Rock debris sound wave detection module and measurement method

Abstract

The invention provides a rock debris sound wave detection module which comprises an ultrasonic transmitting device used for transmitting high-frequency longitudinal waves; the delay block component can convert the high-frequency longitudinal waves emitted by the ultrasonic wave emitting device into high-frequency transverse waves and enable the high-frequency transverse waves to be vertically emitted into the rock debris sample; the bearing plate is used for placing a rock debris sample; and the ultrasonic receiving device is used for receiving the high-frequency longitudinal waves or the high-frequency transverse waves emitted out of the bearing plate. According to the invention, only one group of ultrasonic transmitting device and ultrasonic receiving device is used, the ultrasonic transmitting device only needs to transmit longitudinal waves, and longitudinal wave and transverse wave waveforms can be generated according to measurement requirements, so that longitudinal wave and transverse wave speed measurement of the rock debris sample is completed; the problems that transverse waves are not easy to generate and the arrival time of the transverse waves is not easy to extract in a traditional measurement method are solved. The rock debris sound wave measurement process is simplified, the rock debris sound wave detection precision is improved, and reliable sound wave data can be provided for formation pressure pre-monitoring while drilling.

Description

Technical Field

[0001] The present invention relates to the technical field of rock cuttings acoustic wave detection, and in particular to a rock cuttings acoustic wave detection module and a measurement method. Background Art

[0002] During the drilling process, the drill bit will produce a large amount of debris when breaking the rock. The debris will return to the ground with the mud circulation. The debris is collected on the ground and used as an important material research object for formation pressure prediction and monitoring. It is not only an economical measurement material, but also an effective and reliable measurement method. The debris comes from the drilled formation, and its physical parameters do not change significantly. Among them, the acoustic wave velocity is an important means of evaluating formation pressure. It is completely possible to obtain the acoustic wave velocity of the drilled formation by measuring the acoustic wave velocity of the rock cuttings on the ground, so that the three pressures of the formation (formation pore (fluid) pressure (Pp), formation collapse pressure (Pc) and formation fracture pressure (Pf)) can be evaluated.

[0003] Practice has proved that the ultrasonic measurement method can easily measure the longitudinal wave velocity of rock cuttings. However, since high-frequency shear waves are not easy to generate and the extraction of shear waves will be interfered by other waveforms, it is difficult to do so, resulting in low accuracy in measuring the shear wave velocity of rock cuttings.

[0004] In view of the problems in the prior art, the present invention provides a rock cuttings acoustic wave detection module and a measurement method. Summary of the invention

[0005] In order to overcome the defects of the prior art, the present invention provides a rock cuttings acoustic wave detection module, the detection module comprising:

[0006] Ultrasonic wave transmitting device 201, which is used to transmit high-frequency longitudinal waves;

[0007] The delay block component 100 is capable of converting the high-frequency longitudinal wave emitted by the ultrasonic emitting device 201 into a high-frequency shear wave, and allowing the high-frequency shear wave to be vertically emitted into the rock chip sample 203;

[0008] A support plate 204 for placing the rock cutting sample 203;

[0009] The ultrasonic receiving device 202 is used to receive the high-frequency longitudinal wave or high-frequency transverse wave emitted from the supporting plate 204 .

[0010] According to one embodiment of the present invention, the delay block component 100 includes a first wedge block 101 and a second wedge block 102, wherein the first wedge block 101 and the second wedge block 102 are made of different materials, and the intersection surface of the first wedge block 101 and the second wedge block 102 is an inclined surface;

[0011] The inclined plane angle of the first wedge block is θ2, and the inclined plane angle of the second wedge block is θ1, which satisfies the following relationship:

[0012]

[0013] Where: V p1 is the longitudinal wave velocity of the first wedge; V s2 is the shear wave velocity of the second wedge;

[0014] The height of the first wedge block satisfies: making the longitudinal wave propagation time of the first wedge block equal to the longitudinal wave propagation time of the second wedge block.

[0015] According to one embodiment of the present invention, as the height of the first wedge block changes, the first wedge block 101 is a hexahedron or a heptahedron, wherein:

[0016] When the first wedge block 101 is a hexahedron, it includes: a first horizontal top surface 1011, a right side inclined surface 1012, a left side vertical surface 1013, a horizontal bottom surface 1014, a first front surface 1015, and a first rear surface 1016, wherein the right side inclined surface 1012 and the left side vertical surface 1013 are connected to the first horizontal top surface 1011, the horizontal bottom surface 1014 is connected to the right side inclined surface 1012 and the left side vertical surface 1013, and the first front surface 1015 and the first rear surface 1016 are connected to the first horizontal top surface 1011, the right side inclined surface 1012, the left side vertical surface 1013, and the horizontal bottom surface 1014;

[0017] When the first wedge block 101 is a heptahedron, it includes: a first horizontal top surface 1011, a right side inclined surface 1012, a left side vertical surface 1013, a horizontal bottom surface 1014, a first front surface 1015, a first rear surface 1016, and a first right side vertical surface 1017, wherein the right side inclined surface 1012 and the left side vertical surface 1013 are connected to the first horizontal top surface 1011, the first right side vertical surface 1017 is connected to the right side inclined surface 1012, the horizontal bottom surface 1014 is connected to the first right side vertical surface 1017 and the left side vertical surface 1013, and the first front surface 1015 and the first rear surface 1016 are connected to the first horizontal top surface 1011, the right side inclined surface 1012, the left side vertical surface 1013, the horizontal bottom surface 1014, and the first right side vertical surface 1017;

[0018] The extended vertical surface 1018 obtained by extending the intersection line of the first horizontal top surface 1011 and the right inclined surface 1012 in the vertical direction divides the horizontal bottom surface 1014 into two areas. The horizontal bottom surface 10141 of the first area is connected to the left vertical surface 1013, and the horizontal bottom surface 10142 of the second area is connected to the right inclined surface 1012 or the first right vertical surface 1017.

[0019] According to one embodiment of the present invention, the second wedge block 102 is a hexahedron, comprising: a second horizontal top surface 1021, a second right vertical surface 1022, a left inclined surface 1023, a bottom inclined surface 1024, a second front surface 1025, and a second rear surface 1026, wherein the second right vertical surface 1022 and the left inclined surface 1023 are connected to the second horizontal top surface 1021, the bottom inclined surface 1024 is connected to the second right vertical surface 1022 and the left inclined surface 1023, and the second front surface 1025 and the second rear surface 1026 are connected to the second horizontal top surface 1021, the second right vertical surface 1022, the left inclined surface 1023, and the bottom inclined surface 1024.

[0020] According to one embodiment of the present invention, the right side inclined surface 1012 of the first wedge block 101 intersects with the bottom inclined surface 1024 of the second wedge block 102, serving as the intersecting surface;

[0021] The supplementary angle between the first horizontal top surface 1011 of the first wedge block 101 and the right inclined surface 1012 is used as the inclined surface angle of the first wedge block;

[0022] The angle between the left inclined surface 1023 and the bottom inclined surface 1024 of the second wedge block 102 is used as the second wedge block inclined surface angle;

[0023] The time required for the high-frequency longitudinal wave to vertically enter from the first horizontal top surface 1011 of the first wedge block 101, propagate in the first wedge block 101, and vertically exit from the horizontal bottom surface 1014 of the first wedge block 101 is taken as the longitudinal wave propagation time of the first wedge block;

[0024] The high-frequency longitudinal wave is vertically injected from the left inclined surface 1023 of the second wedge block 102, propagates in the second wedge block 102, and is converted into a high-frequency transverse wave when reaching the intersection surface. The high-frequency transverse wave propagates in the first wedge block 101, and the time required for vertical injection from the horizontal bottom surface 1014 of the first wedge block 101 is used as the propagation time of the longitudinal wave of the second wedge block.

[0025] According to one embodiment of the present invention, the detection module includes a rock debris shear wave measurement mode, a shear wave zero-delay measurement mode, a rock debris longitudinal wave measurement mode, and a longitudinal wave zero-delay measurement mode, wherein;

[0026] In the rock chip shear wave measurement mode, the rock chip sample 203 is placed between the bottom surface of the delay block component 100 and the support plate 204, and the ultrasonic transmitter 201 disposed on the left inclined surface 1023 transmits high-frequency longitudinal waves, which are vertically injected into the left inclined surface 1023. The high-frequency longitudinal waves are converted into high-frequency shear waves at the intersection surface. The high-frequency shear waves pass through the first wedge 101, the rock chip sample 203 and the support plate 204, and are received by the ultrasonic receiver 202 disposed at the bottom position of the horizontal bottom surface 10142 of the second zone;

[0027] In the shear wave zero-delay measurement mode, the support plate 204 is placed on the bottom surface of the delay block component 100, and the ultrasonic emitting device 201 disposed on the left inclined surface 1023 emits high-frequency longitudinal waves, which are vertically injected into the left inclined surface 1023. The high-frequency longitudinal waves are converted into high-frequency shear waves at the intersection surface. The high-frequency shear waves pass through the first wedge block 101 and the support plate 204, and are received by the ultrasonic receiving device 202 disposed at the bottom position of the horizontal bottom surface 10142 of the second zone;

[0028] In the rock chip longitudinal wave measurement mode, the rock chip sample 203 is placed between the bottom surface of the delay block component 100 and the support plate 204, and the ultrasonic transmitter 201 disposed on the first horizontal top surface 1011 transmits high-frequency longitudinal waves, which are vertically injected into the first horizontal top surface 1011. The high-frequency longitudinal waves pass through the first wedge 101, the rock chip sample 203 and the support plate 204, and are received by the ultrasonic receiver 202 disposed at the bottom position of the first zone horizontal bottom surface 10141;

[0029] In the longitudinal wave zero-delay measurement mode, the support plate 204 is placed on the bottom surface of the delay block component 100, and the ultrasonic transmitting device 201 arranged on the first horizontal top surface 1011 transmits high-frequency longitudinal waves, which are vertically injected into the first horizontal top surface 1011. The high-frequency longitudinal waves pass through the first wedge block 101 and the support plate 204, and are received by the ultrasonic receiving device 202 arranged at the bottom position of the first zone horizontal bottom surface 10141.

[0030] According to one embodiment of the present invention, the ultrasonic transmitting device 201 adopts an ultrasonic transmitting probe, the ultrasonic receiving device 202 adopts an ultrasonic receiving probe, and the supporting plate 204 adopts an epoxy resin board, wherein the transmitting voltage of the ultrasonic transmitting device 201 satisfies: making the longitudinal wave propagation amplitude of the first wedge block 101 equal to the longitudinal wave propagation amplitude of the second wedge block 102.

[0031] According to another aspect of the present invention, there is also provided a rock cuttings acoustic wave measurement method, which is performed by the detection module as described in any one of the above items, and the method comprises:

[0032] The detection module is used to measure the shear wave zero delay, the shear wave waveform of the rock cuttings sample, the longitudinal wave zero delay, and the longitudinal wave waveform of the rock cuttings sample;

[0033] Based on the shear wave waveform and the longitudinal wave waveform of the rock cuttings sample, the shear wave arrival time is extracted, and combined with the shear wave zero delay, the effective shear wave arrival time of the rock cuttings sample is obtained;

[0034] Based on the longitudinal wave waveform of the rock cuttings sample, the longitudinal wave arrival time is extracted, and combined with the longitudinal wave zero delay, the effective longitudinal wave arrival time of the rock cuttings sample is obtained;

[0035] Based on the effective shear wave arrival time and the effective longitudinal wave arrival time, combined with the thickness of the rock chip sample, the shear wave velocity and the longitudinal wave velocity of the rock chip sample are obtained.

[0036] According to one embodiment of the present invention, the method comprises:

[0037] Subtracting the longitudinal wave waveform of the rock cuttings sample from the shear wave waveform of the rock cuttings sample to obtain a shear wave waveform of the rock cuttings sample with a high signal-to-noise ratio, and extracting the arrival time of the shear wave;

[0038] The effective shear wave arrival time is obtained by subtracting the shear wave zero delay from the shear wave arrival time;

[0039] The longitudinal wave arrival time is extracted from the longitudinal wave waveform of the rock cuttings sample, and the effective longitudinal wave arrival time is obtained by subtracting the longitudinal wave zero delay from the longitudinal wave arrival time.

[0040] According to another aspect of the present invention, a storage medium is provided, which contains a series of instructions for executing the method steps as described in any one of the above.

[0041] The present invention provides a rock cuttings acoustic wave detection module and a measurement method, which have the following advantages over the prior art:

[0042] The present invention only uses a set of ultrasonic transmitting devices and ultrasonic receiving devices. The ultrasonic transmitting device only needs to emit longitudinal waves to generate longitudinal and transverse wave waveforms according to measurement needs, thereby completing the longitudinal and transverse wave velocity measurements of rock cuttings samples, solving the problem that transverse waves are not easy to generate and difficult to extract in traditional measurement methods.

[0043] The present invention simplifies the rock cuttings acoustic wave measurement process, improves the rock cuttings acoustic wave detection accuracy, and can provide reliable acoustic wave data for formation pressure while drilling pre-monitoring.

[0044] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0046] Figure 1 It shows a structural block diagram of a rock cuttings acoustic wave detection module according to an embodiment of the present invention;

[0047] Figure 2A block diagram of a delay block component structure according to an embodiment of the present invention is shown;

[0048] Figure 3 A block diagram of a delay block component structure according to another embodiment of the present invention is shown;

[0049] Figure 4 A schematic diagram of a rock fragment shear wave measurement mode according to an embodiment of the present invention is shown;

[0050] Figure 5 A schematic diagram of a shear wave zero-delay measurement mode according to an embodiment of the present invention is shown;

[0051] Figure 6 A schematic diagram of a rock fragment longitudinal wave measurement mode according to an embodiment of the present invention is shown;

[0052] Figure 7 A schematic diagram of a longitudinal wave zero-delay measurement mode according to an embodiment of the present invention is shown;

[0053] Figure 8 A schematic diagram of PP wave zero-delay measurement according to an embodiment of the present invention is shown;

[0054] Fig. 9 A flowchart of a rock cuttings acoustic wave measurement method according to an embodiment of the present invention is shown;

[0055] Fig.10 A flowchart of a rock cuttings acoustic wave measurement method according to another embodiment of the present invention is shown;

[0056] Fig.11 A schematic diagram of shear wave arrival time extraction according to an embodiment of the present invention is shown.

[0057] In the accompanying drawings, the same reference numerals are used for the same components. In addition, the accompanying drawings are not drawn according to the actual scale.

[0058] The meanings of the various reference numerals in the accompanying drawings are as follows: 100-delay block component; 101-first wedge block; 102-second wedge block; 1011-first horizontal top surface; 1012-right side inclined surface; 1013-left side vertical surface; 1014-horizontal bottom surface; 10141-first zone horizontal bottom surface; 10142-second zone horizontal bottom surface; 1015-first front surface; 1016-first rear surface; 1017-first right side vertical surface; 1018-extended vertical surface; 1021-second horizontal top surface; 1022-second right side vertical surface; 1023-left side inclined surface; 1024-bottom inclined surface; 1025-second front surface; 1026-second rear surface; 201-ultrasonic transmitting device; 202-ultrasonic receiving device; 203-rock cuttings sample; 204-support plate. DETAILED DESCRIPTION

[0059] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0060] The prior art (CN2638064Y) provides a rock cuttings acoustic wave velocity measuring device, which is composed of an ultrasonic detector, longitudinal wave and transverse wave probes, a fixed pressurizing device, a transmission line, etc. The longitudinal wave and transverse wave probes are each composed of a transmitting probe and a receiving probe. Two guide rails are installed on the base, and the weight block is installed on the guide rails to move up and down. A probe support is installed on the upper side of the base and the lower side of the weight block. The transmitting probe and the receiving probe are installed on the upper and lower probe supports respectively. The two probes are each connected to the ultrasonic detector by an acoustic wave transmission line, and the measured rock cuttings are placed between the two probes. The function of the weight block is to apply a certain pressure to the acoustic wave probe so that it has good contact with the surface of the rock cuttings. By measuring the time it takes for the sound wave to pass through the rock cuttings, the wave velocity of the rock cuttings is calculated, and the physical and mechanical properties, pressure characteristics, and ground stress of the underground rock formation are calculated and analyzed in real time, providing necessary basic data for the exploration and development of oil and natural gas and oil and gas well engineering. However, the prior art requires both a longitudinal wave probe and a shear wave probe to detect the wave velocity of rock cuttings, and cannot simultaneously measure the shear wave velocity and the longitudinal wave velocity of rock cuttings when the ultrasonic detector only emits longitudinal waves.

[0061] The prior art (CN209086440U) provides an ultrasonic detector device that can be stably placed on complex terrain, including an operating table, the operating table is fixedly arranged on a fixed frame, the fixed frame is provided with a support rod, the support rod is sleeved with a telescopic rod, the operating table is provided with an ultrasonic detector, and the bottom of the operating table is also provided with a sound wave transmitter and a sound wave receiver. The advantage of the utility model is that it can obtain the drillability level of the formation at any time, accurately and timely by calculating the returned rock cuttings on complex ground. The position control of the support rod and the telescopic rod is achieved by tightening screws, and the special configuration of the ball-hinged support foot is used to fix the device to the ground, which has the characteristics of high stability and easy operation. However, the prior art cannot simultaneously realize the measurement of the shear wave velocity and the longitudinal wave velocity of the rock cuttings when the ultrasonic detector only emits longitudinal waves.

[0062] The prior art (CN111948293A) provides an ultrasonic measurement system for rock cuttings, the measurement system includes an ultrasonic measurement device, an ultrasonic acquisition device that can be connected to the ultrasonic measurement device signal, and a computer that can be connected to the ultrasonic acquisition device, wherein the ultrasonic measurement device has a base, a support frame arranged on the base, and an ultrasonic probe element arranged on the support frame, and the ultrasonic probe element can emit and receive selective shear waves and longitudinal waves, the ultrasonic acquisition device is used to drive the ultrasonic probe element to work and emit ultrasonic signals and collect reflected wave signals, and the computer is used to display and process the data of the ultrasonic acquisition device. The measurement system uses rock cuttings for measurement, is not limited by the wellbore, and can conveniently perform measurement in real time. However, the prior art cannot simultaneously achieve the measurement of the shear wave velocity and the longitudinal wave velocity of the rock cuttings when the ultrasonic measurement device only emits longitudinal waves.

[0063] In summary, the prior art has the problem that shear waves are not easy to generate and difficult to extract when they arrive. In view of the above-mentioned defects of the prior art, the present invention provides a rock chip acoustic wave detection module and measurement method, which only uses a set of ultrasonic transmitters and ultrasonic receivers. The ultrasonic transmitter only needs to transmit longitudinal waves to generate longitudinal and shear wave waveforms according to measurement needs, thereby completing the longitudinal and shear wave velocity measurements of rock chip samples, simplifying the rock chip acoustic wave measurement process, improving the accuracy of rock chip acoustic wave detection, and providing reliable acoustic wave data for pre-monitoring of formation pressure while drilling.

[0064] Figure 1 A structural block diagram of a rock cuttings acoustic wave detection module according to an embodiment of the present invention is shown.

[0065] like Figure 1 As shown, a rock chip acoustic wave detection module includes: a delay block component 100, an ultrasonic transmitting device 201, an ultrasonic receiving device 202 and a supporting plate 204.

[0066] The ultrasonic transmitting device 201 is used to transmit high-frequency longitudinal waves. The delay block component 100 can convert the high-frequency longitudinal waves emitted by the ultrasonic transmitting device 201 into high-frequency shear waves, and make the high-frequency shear waves vertically enter the rock cutting sample 203. The support plate 204 is used to place the rock cutting sample 203. The ultrasonic receiving device 202 is used to receive the high-frequency longitudinal waves or high-frequency shear waves emitted from the support plate 204.

[0067] In one embodiment, Figure 1 As shown, the delay block component 100 includes a first wedge block 101 and a second wedge block 102, wherein the first wedge block 101 and the second wedge block 102 are made of different materials, and the intersection surface between the two is an inclined surface, that is, the intersection surface between the first wedge block 101 and the second wedge block 102 is an intersecting inclined surface.

[0068] Furthermore, since the materials of the first wedge block 101 and the second wedge block 102 are different, the longitudinal wave velocities and transverse wave velocities of the two are different. The longitudinal wave velocities of the first wedge block 101 and the second wedge block 102 are V and V, respectively. p1 and V p2 The shear wave velocities of the first wedge 101 and the second wedge 102 are V s1 and V s2 In one embodiment, Figure 1 As shown, the first wedge 101 is divided into zone I (V p1 , V s1 ) and II zone (V p1 , V s1 ), the second wedge 102 is divided into zone III (V p2 , V s2 ).

[0069] In one embodiment, Figure 1 As shown, the inclined surface angle of the first wedge block is θ2, and the inclined surface angle of the second wedge block is θ1, which satisfies the following relationship:

[0070]

[0071] Where: V p1 is the longitudinal wave velocity of the first wedge; V s2 is the shear wave velocity of the second wedge.

[0072] Specifically, the first wedge 101 is a polyhedron, the top surface and the bottom surface are parallel, and the inclined surface angle of the first wedge is θ2. The second wedge 102 is also a polyhedron, and the inclined surface angle of the second wedge is θ1. The inclined surface angles of the first wedge 101 and the second wedge 102 satisfy expression (1), so that the high-frequency longitudinal wave incident vertically from the inclined surface of the second wedge 102 will be converted into a high-frequency shear wave incident on the first wedge 101 after reaching the intersecting inclined surface of the two, and will be emitted vertically from the bottom surface of the first wedge 101. The present invention generates a shear wave through the delay block component 100 and makes the shear wave vertically incident on the rock cutting sample 203, thereby realizing the accurate measurement of the shear wave velocity of the rock cuttings.

[0073] In one embodiment, when performing rock chip sonic wave measurement, the rock chip sample 203 is placed between the bottom surface of the delay block member 100 and the support plate 204. When the ultrasonic transmitting device 201 is placed on the inclined surface of the first wedge block 102 to transmit high-frequency longitudinal waves, the ultrasonic receiving device 202 is placed on the bottom surface of the zone II of the first wedge block 101 to receive high-frequency shear waves.

[0074] In one embodiment, when performing rock chip sonic measurement, the rock chip sample 203 is placed between the bottom surface of the delay block member 100 and the support plate 204. When the ultrasonic transmitting device 201 is placed on the top surface of the first wedge 101, the ultrasonic receiving device 202 is placed on the bottom surface of the I zone of the first wedge 101 to receive high-frequency longitudinal waves.

[0075] The present invention only uses a set of ultrasonic emitting device 201 and ultrasonic receiving device 202. The ultrasonic emitting device 201 only needs to emit longitudinal waves to generate longitudinal and transverse wave waveforms according to measurement requirements, thereby completing the longitudinal and transverse wave velocity measurements of the rock cuttings sample 203, solving the problem that transverse waves are not easy to generate and extract in traditional measurement methods.

[0076] In one embodiment, the height of the first wedge block satisfies: making the longitudinal wave propagation time of the first wedge block equal to the longitudinal wave propagation time of the second wedge block. Specifically, the longitudinal wave propagation time of the first wedge block refers to: the time taken for the longitudinal wave to propagate in the first wedge block 101 and reach the bottom surface from the top surface of the first wedge block 101. The longitudinal wave propagation time of the second wedge block refers to: the total time taken for the longitudinal wave to propagate in the second wedge block 102 and reach the intersecting inclined surface and transform into a transverse wave, and for the transverse wave to propagate in the first wedge block 101.

[0077] In one embodiment, the ultrasonic transmitting device 201 uses an ultrasonic transmitting probe for transmitting high-frequency longitudinal waves. Specifically, when the ultrasonic transmitting probe is placed on the inclined surface of the second wedge block 102, the high-frequency longitudinal wave passes through the second wedge block 102 and reaches the intersecting inclined surface, and then is converted into a high-frequency transverse wave and incident on the first wedge block 101, and is emitted perpendicularly to the bottom surface of the first wedge block 101. When the ultrasonic transmitting probe is placed on the top surface of the first wedge block 101, the high-frequency longitudinal wave passes through the first wedge block 101 directly to the bottom surface of the first wedge block 101, and is emitted perpendicularly to the bottom surface of the first wedge block 101. Furthermore, the transmitting voltage of the ultrasonic transmitting device 201 satisfies: making the longitudinal wave propagation amplitude of the first wedge block 101 equal to the longitudinal wave propagation amplitude of the second wedge block 102.

[0078] In one embodiment, the ultrasonic receiving device 202 uses an ultrasonic receiving probe for receiving high-frequency longitudinal waves and high-frequency transverse waves. Specifically, when the ultrasonic transmitting probe is placed on the inclined surface of the second wedge block 102, the ultrasonic receiving probe is placed on the bottom surface of the II zone of the first wedge block 101 to receive high-frequency transverse waves. When the ultrasonic transmitting probe is placed on the top surface of the first wedge block 101, the ultrasonic receiving probe is placed on the bottom surface of the I zone of the first wedge block 101 to receive high-frequency longitudinal waves.

[0079] In one embodiment, the support plate 204 is an epoxy resin plate. Specifically, the support plate 204 is a flat plate made of epoxy resin, which is used to support the rock cuttings sample 203 to prevent the rock cuttings sample 203 from contacting and sticking with the ultrasonic receiving device 202. Furthermore, the size and thickness of the support plate 204 are fixed, and the rock cuttings sample 203 and the support plate 204 are bonded together as the rock cuttings sample to be measured. When performing rock cuttings acoustic wave measurement, the rock cuttings sample to be measured is placed on the bottom surface of the first wedge 101 and on the ultrasonic receiving device 202.

[0080] As the height of the first wedge changes, the first wedge 101 is a hexahedron (eg Figure 2 ) or a heptahedron (such as Figure 3 ), Figure 2 is a front view of the delay block component 100, as shown Figure 2 As shown, when the first wedge block 101 is a hexahedron, it includes: a first horizontal top surface 1011, a right inclined surface 1012, a left vertical surface 1013, a horizontal bottom surface 1014, a first front surface 1015 ( Figure 2 Not marked), the first rear surface 1016 ( Figure 2 not marked in the figure).

[0081] like Figure 2 As shown, the right side inclined surface 1012 and the left side vertical surface 1013 are connected to the first horizontal top surface 1011, the horizontal bottom surface 1014 is connected to the right side inclined surface 1012 and the left side vertical surface 1013, and the first front surface 1015 and the first rear surface 1016 are connected to the first horizontal top surface 1011, the right side inclined surface 1012, the left side vertical surface 1013, and the horizontal bottom surface 1014.

[0082] Figure 3 is a front view of the delay block component 100, as shown Figure 3 As shown, when the first wedge block 101 is a heptahedron, it includes: a first horizontal top surface 1011, a right inclined surface 1012, a left vertical surface 1013, a horizontal bottom surface 1014, a first front surface 1015 ( Figure 3 Not marked), the first rear surface 1016 ( Figure 3 Not marked in the figure), the first right vertical plane 1017.

[0083] like Figure 3 As shown, the right side inclined surface 1012 and the left side vertical surface 1013 are connected to the first horizontal top surface 1011, the first right side vertical surface 1017 is connected to the right side inclined surface 1012, the horizontal bottom surface 1014 is connected to the first right side vertical surface 1017 and the left side vertical surface 1013, and the first front surface 1015 and the first rear surface 1016 are connected to the first horizontal top surface 1011, the right side inclined surface 1012, the left side vertical surface 1013, the horizontal bottom surface 1014, and the first right side vertical surface 1017.

[0084] like Figure 2 and Figure 3 As shown, the extended vertical plane 1018 obtained by extending the intersection line of the first horizontal top surface 1011 and the right inclined surface 1012 in the vertical direction divides the horizontal bottom surface 1014 into two areas (area I 10141 and area II 10142), the horizontal bottom surface 10141 of the first area is connected to the left vertical surface 1013, and the horizontal bottom surface 10142 of the second area is connected to the right inclined surface 1012 or the first right vertical surface 1017.

[0085] like Figure 2 and Figure 3 As shown, the second wedge block 102 is a hexahedron, including: a second horizontal top surface 1021, a second right vertical surface 1022, a left inclined surface 1023, a bottom inclined surface 1024, a second front surface 1025 ( Figure 2 and Figure 3 Not marked), the second rear surface 1026 ( Figure 2 and Figure 3 not marked in the figure).

[0086] like Figure 2 and Figure 3 As shown, the second right vertical surface 1022 and the left inclined surface 1023 are connected to the second horizontal top surface 1021, the bottom inclined surface 1024 is connected to the second right vertical surface 1022 and the left inclined surface 1023, and the second front surface 1025 and the second rear surface 1026 are connected to the second horizontal top surface 1021, the second right vertical surface 1022, the left inclined surface 1023, and the bottom inclined surface 1024.

[0087] like Figure 2 and Figure 3 As shown, the right side inclined surface 1012 of the first wedge block 101 intersects with the bottom inclined surface 1024 of the second wedge block 102 as the intersection surface. The supplementary angle of the angle between the first horizontal top surface 1011 of the first wedge block 101 and the right side inclined surface 1012 is taken as the first wedge inclined surface angle θ2. The angle between the left side inclined surface 1023 of the second wedge block 102 and the bottom inclined surface 1024 is taken as the second wedge inclined surface angle θ1.

[0088] like Figure 2 and Figure 3 As shown, the high-frequency longitudinal wave is vertically injected from the first horizontal top surface 1011 of the first wedge block 101, propagates in the first wedge block 101, and the time required for vertically ejecting from the horizontal bottom surface 1014 of the first wedge block 101 is taken as the first wedge longitudinal wave propagation time. The high-frequency longitudinal wave is vertically injected from the left inclined surface 1023 of the second wedge block 102, propagates in the second wedge block 102, and is converted into a high-frequency transverse wave when it reaches the intersection surface. The high-frequency transverse wave propagates in the first wedge block 101, and the time required for vertically ejecting from the horizontal bottom surface 1014 of the first wedge block 101 is taken as the second wedge longitudinal wave propagation time.

[0089] The present invention provides a rock chip acoustic wave detection module comprising: a rock chip shear wave measurement mode, a shear wave zero-delay measurement mode, a rock chip longitudinal wave measurement mode, and a longitudinal wave zero-delay measurement mode.

[0090] Figure 4 A schematic diagram of a rock fragment shear wave measurement mode according to an embodiment of the present invention is shown.

[0091] like Figure 4 As shown, in the rock chip shear wave measurement mode, the rock chip sample 203 is placed between the bottom surface of the delay block component 100 and the support plate 204, and the ultrasonic transmitting device 201 arranged on the left inclined surface 1023 emits high-frequency longitudinal waves, which are vertically injected into the left inclined surface 1023. The high-frequency longitudinal waves are converted into high-frequency shear waves at the intersection surface. The high-frequency shear waves pass through the first wedge block 101, the rock chip sample 203 and the support plate 204, and are received by the ultrasonic receiving device 202 arranged at the bottom position of the horizontal bottom surface 10142 of the second zone.

[0092] Specifically, the ultrasonic transmitting device 201 is placed on the left side inclined surface 1023, and emits a longitudinal wave and is incident on the second wedge block 102 perpendicularly to the left side inclined surface 1023. The longitudinal wave reaches the intersecting inclined surface and is incident on the first wedge block 101 at an incident angle θ1, and then is converted into a refracted wave PS, which propagates in the first wedge block 101 along the refraction angle θ2. The refracted wave PS is a conversion wave from a longitudinal wave to a transverse wave, and propagates at the transverse wave speed. The refracted wave PS reaches the second zone horizontal bottom surface 10142 of the first wedge block 101, and is emitted perpendicularly to the second zone horizontal bottom surface 10142, enters the interior of the rock cutting sample 203, and propagates as an S wave, that is, as a transverse wave. Then it is incident perpendicularly to the interior of the support plate 204, and is also propagated as an S wave, and finally is incident on the ultrasonic receiving device 202, and the ultrasonic receiving device 202 records the transverse wave waveform of the rock cutting sample 203.

[0093] Figure 5 A schematic diagram of a shear wave zero-delay measurement mode according to an embodiment of the present invention is shown.

[0094] like Figure 5 As shown, in the shear wave zero delay measurement mode, the support plate 204 is placed on the bottom surface of the delay block component 100, and the ultrasonic emitting device 201 arranged on the left inclined surface 1023 emits high-frequency longitudinal waves, which are vertically shot into the left inclined surface 1023. The high-frequency longitudinal waves are converted into high-frequency shear waves at the intersection surface. The high-frequency shear waves pass through the first wedge block 101 and the support plate 204, and are received by the ultrasonic receiving device 202 arranged at the bottom position of the horizontal bottom surface 10142 of the second zone.

[0095] Specifically, the ultrasonic transmitting device 201 is placed on the left side inclined surface 1023, and emits a longitudinal wave and is incident on the second wedge block 102 perpendicularly to the left side inclined surface 1023. The longitudinal wave reaches the intersecting inclined surface and is incident on the first wedge block 101 at an incident angle θ1, and then is converted into a refracted wave PS, which propagates in the first wedge block 101 along the refraction angle θ2. The refracted wave PS is a conversion wave from a longitudinal wave to a transverse wave, and propagates at the transverse wave speed. The refracted wave PS reaches the horizontal bottom surface 10142 of the second zone of the first wedge block 101, and is emitted perpendicularly to the horizontal bottom surface 10142 of the second zone, enters the interior of the support plate 204, and propagates as an S wave, that is, as a transverse wave. Finally, it is incident on the ultrasonic receiving device 202, and the ultrasonic receiving device 202 records the shear wave zero delay waveform. The shear wave zero delay waveform has nothing to do with the rock chip sample 203. Since the sound wave passes through the delay block component 100 and the support plate 204, the sound wave propagation delay is caused.

[0096] Figure 6 A schematic diagram of a cuttings longitudinal wave measurement mode according to an embodiment of the present invention is shown.

[0097] like Figure 6 As shown, in the rock chip longitudinal wave measurement mode, the rock chip sample 203 is placed between the bottom surface of the delay block component 100 and the support plate 204, and the ultrasonic transmitting device 201 arranged on the first horizontal top surface 1011 transmits high-frequency longitudinal waves, which are vertically injected into the first horizontal top surface 1011. The high-frequency longitudinal waves pass through the first wedge block 101, the rock chip sample 203 and the support plate 204, and are received by the ultrasonic receiving device 202 arranged at the bottom position of the first zone horizontal bottom surface 10141.

[0098] Specifically, the ultrasonic emitting device 201 is placed on the first horizontal top surface 1011, emitting longitudinal waves and incident vertically into the first wedge block 101 at the first horizontal top surface 1011, propagating as P waves, that is, propagating as longitudinal waves. The longitudinal waves reach the first zone horizontal bottom surface 10141, and are emitted vertically from the first zone horizontal bottom surface 10141, entering the interior of the rock cutting sample 203, and propagating as P waves. Then, the waves are incident vertically into the interior of the support plate 204, also propagating as P waves, and finally incident directly into the ultrasonic receiving device 202, which records the longitudinal wave waveform of the rock cutting sample 203.

[0099] Figure 7 A schematic diagram of a longitudinal wave zero-delay measurement mode according to an embodiment of the present invention is shown.

[0100] like Figure 7As shown, in the longitudinal wave zero-delay measurement mode, the support plate 204 is placed on the bottom surface of the delay block component 100, and the ultrasonic transmitting device 201 arranged on the first horizontal top surface 1011 transmits high-frequency longitudinal waves, which are vertically injected into the first horizontal top surface 1011. The high-frequency longitudinal waves pass through the first wedge block 101 and the support plate 204, and are received by the ultrasonic receiving device 202 arranged at the bottom position of the first zone horizontal bottom surface 10141.

[0101] Specifically, the ultrasonic transmitting device 201 is placed on the first horizontal top surface 1011, emits longitudinal waves and is incident perpendicularly to the first horizontal top surface 1011 into the first wedge block 101, propagating as P waves, that is, propagating as longitudinal waves. The longitudinal wave reaches the horizontal bottom surface 10141 of the first zone and is emitted perpendicularly to the horizontal bottom surface 10141 of the first zone. It enters the interior of the support plate 204 and propagates as a P wave, and finally is incident on the ultrasonic receiving device 202, which records the longitudinal wave zero delay waveform. The longitudinal wave zero delay waveform has nothing to do with the rock chip sample 203. Since the sound wave passes through the delay block component 100 and the support plate 204, the sound wave propagation delay is caused. This time is also called the longitudinal wave propagation time of the first wedge block 101.

[0102] Figure 8 A schematic diagram of PP wave zero-delay measurement according to an embodiment of the present invention is shown.

[0103] like Figure 8 As shown, the ultrasonic transmitting device 201 is placed on the left side inclined surface 1023, emitting longitudinal waves and incident into the second wedge block 102 perpendicularly to the left side inclined surface 1023. The longitudinal waves reach the intersecting inclined surface and enter the first wedge block 101 at an incident angle θ1, and then are converted into refracted waves PP, which propagate in the first wedge block 101 along the refraction angle θ3. The refracted wave PP is a conversion wave from longitudinal waves to longitudinal waves, and propagates at the longitudinal wave speed. The refracted wave PP reaches the second zone horizontal bottom surface 10142 of the first wedge block 101, and is emitted perpendicularly to the second zone horizontal bottom surface 10142, enters the interior of the support plate 204, and propagates as a P wave, that is, a longitudinal wave. Finally, it is incident on the ultrasonic receiving device 202, and the ultrasonic receiving device 202 records the PP wave zero delay waveform. The PP wave zero delay waveform has nothing to do with the rock chip sample 203. Since the sound wave passes through the delay block component 100 and the support plate 204, the sound wave propagation delay is caused. This time is also called the longitudinal wave propagation time of the second wedge block 102.

[0104] according to Figure 8 In the schematic diagram of PP wave zero delay measurement shown in FIG. 1 , the distance between the first horizontal top surface 1011 and the horizontal bottom surface 1014 of the first wedge 101 is adjusted so that the longitudinal wave propagation time of the first wedge 101 is equal to the longitudinal wave propagation time of the second wedge 102. That is, the height of the first wedge needs to satisfy: the longitudinal wave propagation time of the first wedge is equal to the longitudinal wave propagation time of the second wedge.

[0105] According to another aspect of the present invention, a rock cuttings acoustic wave measurement method is provided, which is performed by a rock cuttings acoustic wave detection module.

[0106] Fig. 9 A flowchart of a rock cuttings acoustic wave measurement method according to an embodiment of the present invention is shown.

[0107] like Fig. 9 As shown, in step S901, the shear wave zero delay, the shear wave waveform of the rock cuttings sample, the longitudinal wave zero delay, and the longitudinal wave waveform of the rock cuttings sample are measured by the detection module. Figure 4 The rock chip shear wave measurement mode shown in the figure measures the shear wave waveform of the rock chip sample. Figure 5 The shear wave zero delay measurement mode shown in the figure measures the shear wave zero delay, and the Figure 6 The longitudinal wave waveform of the rock cuttings sample is obtained by measuring the longitudinal wave waveform of the rock cuttings sample. Figure 7 The longitudinal wave zero delay measurement mode shown measures the longitudinal wave zero delay.

[0108] like Fig. 9 As shown, in step S902, based on the shear wave waveform and longitudinal wave waveform of the rock cuttings sample, the shear wave arrival time is extracted, and combined with the shear wave zero delay, the effective shear wave arrival time of the rock cuttings sample is obtained. Specifically, the shear wave waveform of the rock cuttings sample with a high signal-to-noise ratio is subtracted from the longitudinal wave waveform of the rock cuttings sample from the shear wave waveform of the rock cuttings sample, and the shear wave arrival time is extracted. Further, the effective shear wave arrival time is obtained by subtracting the shear wave zero delay from the shear wave arrival time.

[0109] like Fig. 9 As shown, in step S903, based on the longitudinal wave waveform of the rock cuttings sample, the longitudinal wave arrival time is extracted, and combined with the longitudinal wave zero delay, the effective longitudinal wave arrival time of the rock cuttings sample is obtained. Specifically, the longitudinal wave arrival time is extracted from the longitudinal wave waveform of the rock cuttings sample, and the longitudinal wave zero delay is subtracted from the longitudinal wave arrival time to obtain the effective longitudinal wave arrival time.

[0110] like Fig. 9 As shown, in step S904, based on the effective shear wave arrival time and the effective longitudinal wave arrival time, combined with the thickness of the rock cuttings sample, the shear wave velocity and the longitudinal wave velocity of the rock cuttings sample are obtained. Specifically, the shear wave velocity of the rock cuttings sample is calculated by the thickness of the rock cuttings sample and the effective shear wave arrival time. The longitudinal wave velocity of the rock cuttings sample is calculated by the thickness of the rock cuttings sample and the effective longitudinal wave arrival time.

[0111] Fig.10 A flowchart of a rock cuttings acoustic wave measurement method according to another embodiment of the present invention is shown.

[0112] like Fig.10 As shown, in step S1001, the shear wave zero delay is measured. Specifically, Figure 5 As shown, the ultrasonic transmitting device 201 is placed on the left inclined surface 1023 of the second wedge block 102, the ultrasonic receiving device 202 is placed on the bottom surface of zone II of the first wedge block 101 to receive shear waves, and the supporting plate 204 is placed between the bottom surface of zone II of the first wedge block 101 and the ultrasonic receiving device 202 to measure the zero delay of the shear wave.

[0113] like Fig.10 As shown, in step S1002, the shear wave waveform of the rock cuttings sample is measured. Specifically, Figure 4 As shown, the ultrasonic transmitting device 201 is placed on the left inclined surface 1023 of the second wedge block 102, the ultrasonic receiving device 202 is placed on the bottom surface of zone II of the first wedge block 101 to receive shear waves, and the rock cuttings sample 203 is placed on the bottom surface of zone II of the first wedge block 101, the supporting plate 204 and the ultrasonic receiving device 202 to measure the shear wave waveform of the rock cuttings sample 203.

[0114] like Fig.10 As shown, in step S1003, the longitudinal wave zero delay is measured. Specifically, Figure 7 As shown, the ultrasonic transmitting device 201 is placed on the first horizontal top surface 1011 of the first wedge block 101, the ultrasonic receiving device 202 is placed on the bottom surface of zone I of the first wedge block 101 to receive longitudinal waves, and the supporting plate 204 is placed between the bottom surface of zone I of the first wedge block 101 and the ultrasonic receiving device 202 to measure the zero delay of the longitudinal waves.

[0115] like Fig.10 As shown, in step S1004, the longitudinal wave waveform of the rock cuttings sample is measured. Specifically, Figure 6 As shown, the ultrasonic transmitting device 201 is placed on the first horizontal top surface 1011 of the first wedge block 101, the ultrasonic receiving device 202 is placed on the bottom surface of zone I of the first wedge block 101 to receive longitudinal waves, and the rock cutting sample 203 is placed on the bottom surface of zone I of the first wedge block 101, the supporting plate 204 and the ultrasonic receiving device 202 to measure the longitudinal wave waveform of the rock cutting sample 203.

[0116] like Fig.10 As shown, in step S1005, the shear wave waveform is subtracted from the longitudinal wave waveform to obtain a high signal-to-noise ratio shear wave waveform. Specifically, the shear wave waveform of the cuttings sample is subtracted from the longitudinal wave waveform of the cuttings sample to obtain a high signal-to-noise ratio shear wave waveform of the cuttings sample.

[0117] like Fig.10 As shown, in step S1006, the shear wave arrival time is extracted, and the shear wave zero delay is subtracted from the shear wave arrival time to obtain the effective shear wave arrival time. Specifically, the shear wave arrival time is extracted from the shear wave waveform of the rock cuttings sample with a high signal-to-noise ratio, and the shear wave zero delay is subtracted from the shear wave arrival time to obtain the effective shear wave arrival time of the rock cuttings sample.

[0118] like Fig.10 As shown, in step S1007, the shear wave velocity of the rock cuttings sample is calculated. Specifically, the shear wave velocity of the rock cuttings sample is calculated based on the thickness of the rock cuttings sample and the effective shear wave arrival time.

[0119] like Fig.10 As shown, in step S1008, the P-wave arrival time is extracted and the P-wave zero delay is subtracted to obtain the effective P-wave arrival time. Specifically, the P-wave arrival time is extracted from the P-wave waveform of the rock cuttings sample, and the P-wave zero delay is subtracted from the P-wave arrival time to obtain the effective P-wave arrival time of the rock cuttings sample.

[0120] like Fig.10 As shown, in step S1009, the longitudinal wave velocity of the rock cuttings sample is calculated. Specifically, the longitudinal wave velocity of the rock cuttings sample is calculated based on the thickness of the rock cuttings sample and the effective longitudinal wave arrival time.

[0121] like Fig.10 As shown, in step S1010, the longitudinal wave velocity and the shear wave velocity of the rock cutting sample are obtained. Specifically, the rock cutting sample 203 is numbered according to the formation depth where it is located, and the longitudinal wave velocity and the shear wave velocity of the rock cutting sample 203 are recorded.

[0122] Fig.11 A schematic diagram of shear wave arrival time extraction according to an embodiment of the present invention is shown.

[0123] like Fig.11 As shown, the distance between the first horizontal top surface 1011 and the horizontal bottom surface 1014 of the first wedge 101 is adjusted so that the longitudinal wave propagation time of the first wedge 101 is equal to the longitudinal wave propagation time of the second wedge 102. Then, the transmitting voltage of the ultrasonic transmitting device 201 is adjusted so that the longitudinal wave propagation amplitude of the first wedge 101 is equal to the longitudinal wave propagation amplitude of the second wedge 102. Finally, the longitudinal wave waveform of the rock cutting sample 203 is subtracted from the shear wave waveform of the rock cutting sample 203 to obtain the shear wave waveform of the rock cutting sample 203 with a high signal-to-noise ratio, and then the shear wave arrival time is accurately extracted.

[0124] The rock cuttings acoustic wave detection module and the measuring method provided by the present invention can also be used in conjunction with a computer-readable storage medium, on which a computer program is stored, and the computer program is executed to run a rock cuttings acoustic wave measuring method. The computer program can run computer instructions, and the computer instructions include computer program code, which can be in source code form, object code form, executable file or some intermediate form.

[0125] Computer-readable storage media may include: any entity or device that can carry computer program code, recording media, USB flash drives, mobile hard disks, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0126] It should be noted that the content contained in computer-readable storage media can be appropriately increased or decreased based on the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, based on legislation and patent practices, computer-readable storage media do not include electrical carrier signals and telecommunications signals.

[0127] In summary, the present invention provides a rock chip acoustic wave detection module and measurement method, which have the following advantages over the prior art:

[0128] The present invention only uses a set of ultrasonic transmitting devices and ultrasonic receiving devices. The ultrasonic transmitting device only needs to emit longitudinal waves to generate longitudinal and transverse wave waveforms according to measurement needs, thereby completing the longitudinal and transverse wave velocity measurements of rock cuttings samples, solving the problem that transverse waves are not easy to generate and difficult to extract in traditional measurement methods.

[0129] The present invention simplifies the rock cuttings acoustic wave measurement process, improves the rock cuttings acoustic wave detection accuracy, and can provide reliable acoustic wave data for formation pressure while drilling pre-monitoring.

[0130] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0131] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0132] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0133] Certain terms are used throughout this application document to indicate specific system components. As those skilled in the art will recognize, different names can usually be used to indicate the same components, so this application document is not intended to distinguish those components that are only different in name but not in function. In this application document, the terms "comprise", "include" and "have" are used in an open form, and therefore should be interpreted as meaning "including but not limited to...". In addition, the terms "substantially", "substantially" or "approximately" that may be used in this article relate to the tolerances of the corresponding terms accepted by the industry. The term "coupling" as may be used in this article includes direct coupling and indirect coupling via other components, elements, circuits, or modules, wherein for indirect coupling, the components, elements, circuits, or modules between them do not change the information of the signal but can adjust its current level, voltage level, and / or power level. Inferred coupling (for example, one of the elements is coupled to another element by inference) includes direct and indirect coupling between two elements in the same way as "coupling".

[0134] The "one embodiment" or "embodiment" mentioned in the specification means that the specific features, structures or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0135] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0136] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A rock chip acoustic wave detection module, characterized in that: The detection module comprises: An ultrasonic transmitting device (201) for transmitting high-frequency longitudinal waves; A delay block component (100) capable of converting the high-frequency longitudinal wave emitted by the ultrasonic emitting device (201) into a high-frequency shear wave, and allowing the high-frequency shear wave to be vertically emitted into the rock chip sample (203); A support plate (204) for placing the rock cuttings sample (203); The ultrasonic receiving device (202) is used to receive high-frequency longitudinal waves or high-frequency transverse waves emitted from the supporting plate (204).

2. A rock chip acoustic wave detection module according to claim 1, characterized in that: The delay block component (100) comprises a first wedge block (101) and a second wedge block (102), wherein the first wedge block (101) and the second wedge block (102) are made of different materials, and the intersection surface between the first wedge block (101) and the second wedge block (102) is an inclined surface; The inclined plane angle of the first wedge block is θ2, and the inclined plane angle of the second wedge block is θ1, which satisfies the following relationship: Where: V p1 is the longitudinal wave velocity of the first wedge; V s2 is the shear wave velocity of the second wedge; The height of the first wedge block satisfies: making the longitudinal wave propagation time of the first wedge block equal to the longitudinal wave propagation time of the second wedge block.

3. A rock chip acoustic wave detection module as claimed in claim 2, characterized in that: As the height of the first wedge changes, the first wedge (101) is a hexahedron or a heptahedron, wherein: When the first wedge block (101) is a hexahedron, it comprises: a first horizontal top surface (1011), a right side inclined surface (1012), a left side vertical surface (1013), a horizontal bottom surface (1014), a first front surface (1015), and a first rear surface (1016), wherein the right side inclined surface (1012) and the left side vertical surface (1013) are connected to the first horizontal top surface (1011), the horizontal bottom surface (1014) is connected to the right side inclined surface (1012) and the left side vertical surface (1013), and the first front surface (1015) and the first rear surface (1016) are connected to the first horizontal top surface (1011), the right side inclined surface (1012), the left side vertical surface (1013), and the horizontal bottom surface (1014); When the first wedge block (101) is a heptahedron, it comprises: a first horizontal top surface (1011), a right side inclined surface (1012), a left side vertical surface (1013), a horizontal bottom surface (1014), a first front surface (1015), a first rear surface (1016), and a first right side vertical surface (1017), wherein the right side inclined surface (1012) and the left side vertical surface (1013) are connected to the first horizontal top surface (1011), the first right side vertical surface (1017) is connected to the right side inclined surface (1012), the horizontal bottom surface (1014) is connected to the first right side vertical surface (1017) and the left side vertical surface (1013), and the first front surface (1015) and the first rear surface (1016) are connected to the first horizontal top surface (1011), the right side inclined surface (1012), the left side vertical surface (1013), the horizontal bottom surface (1014), and the first right side vertical surface (1017); The extended vertical surface (1018) obtained by extending the intersection line of the first horizontal top surface (1011) and the right side inclined surface (1012) in the vertical direction divides the horizontal bottom surface (1014) into two areas, the horizontal bottom surface (10141) of the first area is connected to the left side vertical surface (1013), and the horizontal bottom surface (10142) of the second area is connected to the right side inclined surface (1012) or the first right side vertical surface (1017).

4. A rock chip acoustic wave detection module as claimed in claim 3, characterized in that: The second wedge block (102) is a hexahedron, comprising: a second horizontal top surface (1021), a second right vertical surface (1022), a left inclined surface (1023), a bottom inclined surface (1024), a second front surface (1025), and a second rear surface (1026), wherein the second right vertical surface (1022) and the left inclined surface (1023) are connected to the second horizontal top surface (1021), the bottom inclined surface (1024) is connected to the second right vertical surface (1022) and the left inclined surface (1023), and the second front surface (1025) and the second rear surface (1026) are connected to the second horizontal top surface (1021), the second right vertical surface (1022), the left inclined surface (1023), and the bottom inclined surface (1024).

5. A rock chip acoustic wave detection module as claimed in claim 4, characterized in that: The right side inclined surface (1012) of the first wedge block (101) intersects with the bottom inclined surface (1024) of the second wedge block (102), serving as the intersecting surface; The supplementary angle of the angle between the first horizontal top surface (1011) of the first wedge block (101) and the right inclined surface (1012) is used as the inclined surface angle of the first wedge block; The included angle between the left inclined surface (1023) and the bottom inclined surface (1024) of the second wedge block (102) is used as the second wedge block inclined surface included angle; The time required for the high-frequency longitudinal wave to vertically enter from the first horizontal top surface (1011) of the first wedge block (101), propagate in the first wedge block (101), and vertically exit from the horizontal bottom surface (1014) of the first wedge block (101) is used as the first wedge longitudinal wave propagation time; The high-frequency longitudinal wave is vertically injected from the left inclined surface (1023) of the second wedge block (102), propagates in the second wedge block (102), and is converted into a high-frequency transverse wave when reaching the intersection surface. The high-frequency transverse wave propagates in the first wedge block (101), and the time required for the high-frequency transverse wave to be vertically injected from the horizontal bottom surface (1014) of the first wedge block (101) is used as the propagation time of the second wedge longitudinal wave.

6. A rock chip acoustic wave detection module according to any one of claims 4 to 5, characterized in that: The detection module includes a rock chip shear wave measurement mode, a shear wave zero-delay measurement mode, a rock chip longitudinal wave measurement mode, and a longitudinal wave zero-delay measurement mode, wherein; In the rock chip shear wave measurement mode, the rock chip sample (203) is placed between the bottom surface of the delay block component (100) and the support plate (204), and a high-frequency longitudinal wave is emitted by an ultrasonic emitting device (201) arranged on the left inclined surface (1023), and vertically enters the left inclined surface (1023). The high-frequency longitudinal wave is converted into a high-frequency shear wave at the intersection surface. The high-frequency shear wave passes through the first wedge block (101), the rock chip sample (203) and the support plate (204), and is received by an ultrasonic receiving device (202) arranged at the bottom position of the horizontal bottom surface (10142) of the second zone; In the shear wave zero-delay measurement mode, the support plate (204) is placed on the bottom surface of the delay block component (100), and a high-frequency longitudinal wave is emitted by an ultrasonic emitting device (201) disposed on the left inclined surface (1023), and vertically enters the left inclined surface (1023). The high-frequency longitudinal wave is converted into a high-frequency shear wave at the intersection surface. The high-frequency shear wave passes through the first wedge block (101) and the support plate (204), and is received by an ultrasonic receiving device (202) disposed at the bottom position of the horizontal bottom surface (10142) of the second zone; In the rock chip longitudinal wave measurement mode, a rock chip sample (203) is placed between the bottom surface of the delay block component (100) and the support plate (204), and a high-frequency longitudinal wave is emitted by an ultrasonic emitting device (201) arranged on the first horizontal top surface (1011), and vertically enters the first horizontal top surface (1011). The high-frequency longitudinal wave passes through the first wedge (101), the rock chip sample (203) and the support plate (204), and is received by an ultrasonic receiving device (202) arranged at the bottom position of the first zone horizontal bottom surface (10141); In the longitudinal wave zero-delay measurement mode, a support plate (204) is placed on the bottom surface of the delay block component (100), and a high-frequency longitudinal wave is emitted by an ultrasonic emitting device (201) arranged on the first horizontal top surface (1011), and vertically enters the first horizontal top surface (1011). The high-frequency longitudinal wave passes through the first wedge block (101) and the support plate (204), and is received by an ultrasonic receiving device (202) arranged at the bottom position of the first zone horizontal bottom surface (10141).

7. A rock chip acoustic wave detection module according to any one of claims 1 to 6, characterized in that: The ultrasonic transmitting device (201) adopts an ultrasonic transmitting probe, the ultrasonic receiving device (202) adopts an ultrasonic receiving probe, and the supporting plate (204) adopts an epoxy resin plate, wherein the transmitting voltage of the ultrasonic transmitting device (201) satisfies: making the longitudinal wave propagation amplitude of the first wedge block (101) equal to the longitudinal wave propagation amplitude of the second wedge block (102).

8. A rock cuttings acoustic wave measurement method, characterized in that: Executed by a detection module as described in any one of claims 1 to 7, the method comprises: The detection module is used to measure the shear wave zero delay, the shear wave waveform of the rock cuttings sample, the longitudinal wave zero delay, and the longitudinal wave waveform of the rock cuttings sample; Based on the shear wave waveform and the longitudinal wave waveform of the rock cuttings sample, the shear wave arrival time is extracted, and combined with the shear wave zero delay, the effective shear wave arrival time of the rock cuttings sample is obtained; Based on the longitudinal wave waveform of the rock cuttings sample, the longitudinal wave arrival time is extracted, and combined with the longitudinal wave zero delay, the effective longitudinal wave arrival time of the rock cuttings sample is obtained; Based on the effective shear wave arrival time and the effective longitudinal wave arrival time, combined with the thickness of the rock chip sample, the shear wave velocity and the longitudinal wave velocity of the rock chip sample are obtained.

9. A rock cuttings acoustic wave measurement method as claimed in claim 8, characterized in that: The method comprises: Subtracting the longitudinal wave waveform of the rock cuttings sample from the shear wave waveform of the rock cuttings sample to obtain a shear wave waveform of the rock cuttings sample with a high signal-to-noise ratio, and extracting the arrival time of the shear wave; The effective shear wave arrival time is obtained by subtracting the shear wave zero delay from the shear wave arrival time; The longitudinal wave arrival time is extracted from the longitudinal wave waveform of the rock cuttings sample, and the effective longitudinal wave arrival time is obtained by subtracting the longitudinal wave zero delay from the longitudinal wave arrival time.

10. A storage medium, characterized in that: It contains a series of instructions for executing the method steps as claimed in any one of claims 8-9.

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