Integrated sensor and method for determining formation drilling parameters

Abstract

The invention provides an integrated sensor and a formation drilling parameter determination method, and belongs to the technical field of logging while drilling in the petroleum industry. The integrated sensor is arranged on a drilling tool, obtains a stratigraphic space gravity vector, a stratigraphic space magnetic field vector and a stratigraphic gamma counting rate in a drilling process, and comprises a mounting framework which is provided with an internal accommodating space, the outer wall of one end of the mounting framework is provided with a gamma ray shielding layer, and the gamma ray shielding layer is provided with a measuring port; the three acceleration sensors are sequentially arranged in the internal accommodating space and are used for measuring three stratum space gravity vectors in the mutually vertical directions; the three magnetic sensors are sequentially arranged in the internal accommodating space and are used for measuring three stratum space magnetic field vectors in the mutually perpendicular directions; and the gamma sensor is arranged in the internal accommodating space corresponding to the position of the gamma ray shielding layer and is used for measuring the stratum gamma counting rate through the measuring port. The device has the advantages of being simple in structure, short in length, accurate in collected data and capable of effectively reducing the drilling cost.

Description

Technical Field

[0001] The invention relates to the technical field of logging while drilling in the petroleum industry, and in particular to an integrated sensor and a method for determining formation drilling parameters. Background Art

[0002] In oil drilling and logging projects, directional instruments are usually composed of three acceleration and three magnetic sensor structures. They measure the gravity vector and magnetic field vector in three-dimensional space in the wellbore, and achieve the purpose of precise control of the wellbore trajectory by calculating the engineering parameters such as well inclination, magnetic azimuth, tool face angle, etc. Gamma imaging instruments usually use single or multiple gamma and magnetic sensor structures. In the wellbore, the gamma sensor measures the intensity of gamma rays in the process of radionuclide decay in the rock formation to achieve the purpose of lithology classification and mud content estimation; the magnetic sensor measures the vector direction of the external magnetic field to realize the direction judgment of the gamma imaging instrument, so as to achieve the purpose of positioning the gamma count rate around the well and two-dimensional imaging.

[0003] However, currently in oil drilling and logging projects, directional instruments and gamma imaging instruments are different logging instruments. In order to achieve accurate measurement of wellbore trajectory engineering parameters, directional instruments are usually installed in non-magnetic drill bits of a specified length to reduce the interference of other drill bits or equipment in measuring the natural magnetic field. Gamma imaging instruments are part of an independent measurement while drilling instrument combination and are usually installed at the lower end of the directional instrument. During drilling construction, the instrument length and sensor measurement points of the measurement while drilling instrument combination are the main factors that limit the acquisition of engineering parameters and rock physical parameters at the same location. In actual application, it is necessary to increase the drilling depth to meet the measurement requirements of the measurement while drilling instrument sensors, which increases the project time and construction cost.

[0004] In addition, gamma imaging uses magnetic sensors to demarcate sectors around the wellbore. Magnetic sensor measurements B x , B y It is the projection of the earth's magnetic field in the radial direction of the instrument. The position of the measurement sector is determined by judging the positional relationship between the gamma sensor measuring point and the projection of the earth's magnetic field vector. Usually, in order to achieve the purpose of imaging, gamma imaging instruments need to use shielding materials to limit the measurement direction of the gamma sensor. In order to meet the environmental requirements of high temperature and strong vibration while drilling measurement, gamma imaging instruments generally use tungsten-nickel-iron alloy as the shielding material of the gamma sensor. Tungsten-nickel-iron alloy material has a certain degree of ferromagnetism. During drilling engineering, road transportation and other activities, the tungsten-nickel-iron alloy material is gradually magnetized after cutting the magnetic field line, resulting in inaccurate measurement results. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide an integrated sensor and a method for determining formation drilling parameters, which is used to solve the problem that in practical applications, the drilling depth needs to be increased to meet the measurement requirements of the while-drilling measurement instrument sensor, which increases the project time and construction cost, and during drilling projects, road transportation and other activities, the tungsten-nickel-iron alloy material is gradually magnetized after cutting the magnetic field lines, resulting in inaccurate measurement results.

[0006] In order to achieve the above object, an embodiment of the present invention provides an integrated sensor, which is arranged on a drilling tool and is used to obtain a formation space gravity vector, a formation space magnetic field vector and a formation gamma count rate during drilling. The integrated sensor includes: A mounting frame having an internal accommodation space, a gamma ray shielding layer being arranged on an outer wall of one end of the mounting frame, and a measuring port being arranged on the gamma ray shielding layer; Three acceleration sensors are sequentially arranged in the internal accommodation space and are used to measure three mutually perpendicular directions of the stratum space gravity vectors; Three magnetic sensors are sequentially arranged in the internal accommodation space and are used to measure three mutually perpendicular directions of the formation space magnetic field vectors; The gamma sensor is arranged in the internal accommodation space corresponding to the position of the gamma ray shielding layer, and is used for measuring the formation gamma count rate through the measuring port.

[0007] Optionally, the three acceleration sensors and the three magnetic sensors are all on the same axis; The measuring direction of each acceleration sensor is parallel to the measuring direction of the corresponding magnetic sensor.

[0008] Optionally, the mounting frame is made of non-magnetic material; The gamma ray shielding layer is made of tungsten-nickel-iron or tungsten-nickel-copper.

[0009] Optionally, the gamma ray shielding layer is tungsten nickel iron; The distance between the magnetic sensor and the gamma ray shielding layer, with the axial direction of the mounting frame as the measuring direction, is greater than 40 cm.

[0010] Optionally, the acceleration sensor is a quartz flexible acceleration sensor or a MEMS acceleration sensor; The magnetic sensor is a fluxgate sensor or a giant magnetoresistance sensor; The gamma sensor is a sodium iodide, bismuth germanate or gadolinium silicate gamma crystal sensor.

[0011] A second aspect of an embodiment of the present invention provides a method for determining formation drilling parameters, the method comprising: The formation space gravity vector and the formation space magnetic field vector of the formation during the drilling process are collected by the above-mentioned integrated sensor; Based on the formation space gravity vector and the formation space magnetic field vector, formation drilling parameters are obtained, and the formation drilling parameters include: gamma count rate direction, gravity tool face angle, well inclination angle and magnetic azimuth.

[0012] Optionally, the gamma count rate direction is calculated using the following formula: ;

[0013] in, is the gamma count rate direction; is the formation space magnetic field vector measured by a magnetic sensor with the radial direction of the mounting frame as the measuring direction and the measuring direction being parallel to the opening direction of the measuring port; It is the spatial magnetic field vector of the formation measured by the magnetic sensor with the radial direction along the mounting frame as the measuring direction.

[0014] Optionally, the gravity tool face angle is calculated using the following formula: ;

[0015] in, is the gravity tool face angle; and It is the stratum space gravity vector measured by two acceleration sensors with the radial direction along the mounting frame as the measuring direction.

[0016] Optionally, the well inclination angle is calculated using the following formula: ;

[0017] in, is the well inclination angle; and is the stratum space gravity vector measured by two acceleration sensors along the radial direction of the mounting frame as the measuring direction; It is the stratum space gravity vector measured by the acceleration sensor with the axial direction of the mounting frame as the measurement direction.

[0018] Optionally, the magnetic azimuth is calculated using the following formula: ;

[0019] in, is the magnetic azimuth; and is the stratum space gravity vector measured by two acceleration sensors along the radial direction of the mounting frame as the measuring direction; is the stratum space gravity vector measured by the acceleration sensor with the axial direction of the mounting frame as the measuring direction; is the formation space magnetic field vector measured by a magnetic sensor with the radial direction of the mounting frame as the measuring direction and the measuring direction being parallel to the opening direction of the measuring port; is the formation space magnetic field vector measured by the magnetic sensor with the radial direction of the mounting frame as the measuring direction; It is the spatial magnetic field vector of the formation measured by the magnetic sensor with the axial direction of the mounting frame as the measuring direction.

[0020] This technical solution integrates three acceleration sensors, three magnetic sensors and a gamma sensor in a mounting frame to perform data measurement during drilling. It has the advantages of simple structure, short length, accurate data collection, effective reduction of drilling costs, construction costs, and improved work efficiency.

[0021] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 is a schematic diagram of the structure of the integrated sensor provided by the present invention; Figure 2 is a schematic diagram of the integrated sensor provided by the present invention during the drilling process; Figure 3 is a front view of a first integrated sensor provided by the present invention; Figure 4 is a front view of a second integrated sensor provided by the present invention; Figure 5 It is a schematic diagram of actual test results of the interference distance of the magnetic field intensity of the magnetic sensor by the axial interference of the magnetic field of the gamma-ray shielding layer of the tungsten-nickel-iron material under saturated magnetization and unsaturated magnetization provided by the present invention; Figure 6 It is a schematic diagram of actual test results of the influence of the gamma-ray shielding layer of tungsten-nickel-iron material on the magnetic azimuth error measured by the integrated sensor under saturated magnetization and unsaturated magnetization provided by the present invention; Figure 7 It is a schematic diagram of actual test results of the influence of the gamma-ray shielding layer of tungsten-nickel-copper material on the axial interference magnetic field under saturated magnetization and unsaturated magnetization provided by the present invention; Figure 8 It is a flow chart of the method for determining formation drilling parameters provided by the present invention.

[0023] Description of Reference Numerals 1-Integrated sensor; 2-Drilling tool; 11-installation frame; 12-gamma ray shielding layer; 13-acceleration sensor; 14-magnetic sensor; 15-gamma sensor; 121-measuring port; 101 - a first acceleration sensor; 102 - a second acceleration sensor; 103 - a third acceleration sensor; 104 - a first magnetic sensor; 105 - a second magnetic sensor; 106 - a third magnetic sensor. DETAILED DESCRIPTION

[0024] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0025] In the embodiments of the present invention, unless otherwise stated, the directional words used, such as "upper, lower, left, right", generally refer to the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the invention product is usually placed when in use. "Inside and outside" refer to inside and outside of a space.

[0026] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0027] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0028] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Figure 1 is a schematic diagram of the structure of the integrated sensor provided by the present invention; Figure 2 is a schematic diagram of the integrated sensor provided by the present invention during the drilling process; Figure 3 is a front view of a first integrated sensor provided by the present invention; Figure 4 is a front view of a second integrated sensor provided by the present invention; Figure 5 It is a schematic diagram of actual test results of the interference distance of the magnetic field intensity of the magnetic sensor by the axial interference of the magnetic field of the gamma-ray shielding layer of the tungsten-nickel-iron material under saturated magnetization and unsaturated magnetization provided by the present invention; Figure 6 It is a schematic diagram of actual test results of the influence of the gamma-ray shielding layer of tungsten-nickel-iron material on the magnetic azimuth error measured by the integrated sensor under saturated magnetization and unsaturated magnetization provided by the present invention; Figure 7 It is a schematic diagram of actual test results of the influence of the gamma-ray shielding layer of tungsten-nickel-copper material on the axial interference magnetic field under saturated magnetization and unsaturated magnetization provided by the present invention; Figure 8 It is a flow chart of the method for determining formation drilling parameters provided by the present invention.

[0032] The prior art directional instruments generally include three accelerations and three magnetic sensors; gamma imaging generally includes two magnetic sensors and a gamma sensor. The main sensors belong to different instruments. When combined measurements are performed underground, the instruments are relatively long and the measuring points are far apart, which increases the drilling cost. This embodiment provides an integrated sensor that integrates the sensor structure of the directional instrument and the gamma imaging. By designing the spacing and materials of the skeleton and shielding materials, the influence of magnetic field interference on the magnetic sensor is reduced, thereby realizing the miniaturized integrated design of the directional and gamma imaging sensors. Figure 1-4 As shown, the integrated sensor is arranged on the drilling tool 2, and is used to obtain the formation space gravity vector, the formation space magnetic field vector and the formation gamma count rate during the drilling process. The integrated sensor 1 includes: The mounting frame 11 has an internal accommodation space, and a gamma ray shielding layer 12 is provided on an outer wall of one end of the mounting frame 11, and the gamma ray shielding layer 12 is provided with a measuring port 121; Three acceleration sensors 13 are sequentially arranged in the internal accommodation space and are used to measure three mutually perpendicular directions of the stratum space gravity vectors; Three magnetic sensors 14 are sequentially arranged in the internal accommodation space and are used to measure three mutually perpendicular directions of the formation space magnetic field vectors; The gamma sensor 15 is disposed in the internal accommodation space corresponding to the location of the gamma ray shielding layer 12 , and is used to measure the formation gamma count rate through the measuring port 121 .

[0033] Specifically, the three acceleration sensors 13 are used to measure the stratum space gravity vectors in three mutually perpendicular directions, wherein each acceleration sensor 13 is used to measure the stratum space gravity vector in one direction, and the order of setting can be set according to the actual situation. Similarly, the magnetic sensor 14 is used to measure the stratum space magnetic field vectors in three mutually perpendicular directions, wherein each magnetic sensor 14 is used to measure the stratum space magnetic field vector in one direction, and the order of setting can be set according to the actual situation. The gamma sensor 15 is arranged in the internal accommodation space corresponding to the gamma ray shielding layer 12, and the gamma ray shielding layer 12 can be pasted on the outer wall of one end of the mounting frame 11, and the gamma ray shielding layer 12 can shield gamma rays, so that the gamma sensor 15 can only measure the stratum gamma count rate through the measuring port 121, thereby ensuring the accuracy of data acquisition.

[0034] Preferably, the gamma sensor 15 has a certain length and is therefore disposed along the axial direction of the mounting frame 11 . Similarly, the gamma ray shielding layer 12 also has a certain length and the measuring port 121 is in a strip shape to match the length of the gamma sensor 15 .

[0035] Further, the three acceleration sensors 13 and the three magnetic sensors 14 are all on the same axis; The measuring direction of each acceleration sensor is parallel to the measuring direction of the corresponding magnetic sensor.

[0036] Specifically, in this embodiment, the three acceleration sensors 13 and the three magnetic sensors 14 are all arranged on the axis of the mounting frame 11 , so that they are located in the axial middle portion of the mounting frame 11 .

[0037] In addition, the three acceleration sensors 13 are divided into: acceleration sensor X101, acceleration sensor Y102, acceleration sensor Z103, and the measurement axes of the three acceleration sensors are orthogonal to each other, forming a three-dimensional coordinate system direction, measuring the space gravity vector G x , G y , G zThe three magnetic sensors 14 are divided into: magnetic sensor X104, magnetic sensor Y105, magnetic sensor Z106 measuring axes are orthogonal to each other, measuring the space magnetic field vector B x , B y , B z Among them, the measuring directions of the acceleration sensor X101 and the magnetic sensor X104 are parallel, the measuring directions of the acceleration sensor Y102 and the magnetic sensor Y105 are parallel, and the measuring directions of the acceleration sensor Z103 and the magnetic sensor Z106 are parallel; more specifically, the measuring axis direction of the magnetic sensor X104 is parallel to the opening direction of the measuring port 121 of the gamma ray shielding layer 12.

[0038] In one embodiment, the sensors on the integrated sensor 1 are arranged in the axial order of acceleration sensor Z103, acceleration sensor X101, acceleration sensor Y102, magnetic sensor X104, magnetic sensor Y105, magnetic sensor Z106, and gamma sensor 107; wherein the acceleration sensor Z103, acceleration sensor X101, acceleration sensor Y102, magnetic sensor X104, magnetic sensor Y105, and magnetic sensor Z106 can be swapped in order.

[0039] Furthermore, the mounting frame 11 is made of non-magnetic material; The gamma ray shielding layer 12 is made of tungsten-nickel-iron or tungsten-nickel-copper.

[0040] Specifically, the mounting frame 11 is made of non-magnetic material. To ensure structural strength, it is configured as a cylindrical structure so that there is a storage space inside. In addition, to ensure the accuracy of data measurement by the magnetic sensor 14, the mounting frame 11 is configured as non-magnetic material, preferably, as high-density aluminum material.

[0041] In one embodiment, the gamma ray shielding layer 12 is tungsten nickel iron; The distance between the magnetic sensor 14 and the gamma-ray shielding layer 12 in the axial direction along the mounting frame as the measuring direction is greater than 40 cm.

[0042] Specifically, in order to ensure the accuracy of the data measured by the magnetic sensor Z106 , a certain spacing distance is set between the magnetic sensor Z106 and the gamma ray shielding layer 12 in the axial direction of the integrated sensor 1 .

[0043] During the design process, Figure 3 As shown, the measuring points of the magnetic sensors X104, Y105 and X106 are in the axial direction of the integrated sensor 1, and the interference magnetic field △B when the gamma ray shielding layer 12 is tungsten nickel iron c B measured by magnetic sensor Z106 zThere is a significant impact, but the impact on magnetic sensor X104 and magnetic sensor Y105 is small. Therefore, adjusting the arrangement order of magnetic sensor Z106 in the integrated sensor can increase the L spacing distance of the interference magnetic field source.

[0044] like Figure 4 As shown, the order of the magnetic sensor X104, the magnetic sensor Y105 and the magnetic sensor Z106 is changed to reduce the influence of the interfering magnetic field on the magnetic sensor Z106.

[0045] The gamma ray shielding layer 12 is made of tungsten nickel iron, and its magnetic pole strength is P L , the interfering magnetic field is △B c and the distance is L, the relationship is as follows:

[0046] The gamma ray shielding layer 12 is made of tungsten-nickel-iron, and the magnetic pole strength P of tungsten-nickel-iron is L Under different magnetization conditions and at different distances L, the interference magnetic field △B c Measure B for magnetic sensor Z106 z The impact is different. Figure 5 As shown in the figure, the actual test results of the magnetization of tungsten nickel iron and the interference distance of the magnetic sensor are shown, which illustrate the measurement of B under saturated magnetization and unsaturated magnetization. z impact.

[0047] Similarly, when using a magnetic sensor with cocentric multi-axis measurement points such as a dual-axis fluxgate or a tri-axis fluxgate, it is necessary to measure B z , adjust the distance between the magnetic sensor Z106 and the gamma ray shielding layer 12.

[0048] Figure 6 The actual test results of the influence of tungsten-nickel-iron on the measurement of magnetic azimuth error by the integrated sensor 1 under saturated magnetization and unsaturated magnetization are illustrated.

[0049] pass Figure 5 and Figure 6 It can be seen that the axial interference magnetic field △B c Less than 50nT, the error effect on magnetic azimuth measurement can be ignored.

[0050] pass Figure 5 and Figure 6 It can be seen that when the gamma-ray shielding layer 12 is made of tungsten-nickel-iron and the distance between it and the magnetic sensor Z106 is greater than 40 cm, the error effect on the magnetic azimuth angle measurement can be ignored.

[0051] In another embodiment, the gamma shielding effect is based on tungsten-based alloys. Referring to the tungsten-based material standard "YS / T 1148-2016 Tungsten-based Heavy Alloys", tungsten-nickel-copper alloys also have suitable tensile strength, hardness and elongation. Figure 7 As shown, the gamma ray shielding layer is tungsten nickel copper, and its saturated magnetization and unsaturated magnetization have an axial interference magnetic field △B c Therefore, when the tungsten-nickel-copper alloy is used as the gamma-ray shielding layer 12 , the spacing distance L between the magnetic sensor Z106 and the gamma-ray shielding layer 12 may not be considered.

[0052] Further, the acceleration sensor 13 is a quartz flexible acceleration sensor or a MEMS acceleration sensor; The magnetic sensor 14 is a fluxgate sensor or a giant magnetoresistance sensor; The gamma sensor 15 is a sodium iodide, bismuth germanate or gadolinium silicate gamma crystal sensor.

[0053] Specifically, the above-mentioned sensor is used for measurement, has a long service life, and can also ensure the accuracy of data measurement.

[0054] like Figure 8 As shown, an embodiment of the present invention further provides a method for determining formation drilling parameters, the method comprising: Step 101, collecting the formation space gravity vector and formation space magnetic field vector of the formation during the drilling process through the above-mentioned integrated sensor; Step 102: Based on the formation space gravity vector and the formation space magnetic field vector, formation drilling parameters are obtained, wherein the formation drilling parameters include: gamma count rate direction, gravity tool face angle, well inclination angle and magnetic azimuth.

[0055] Furthermore, the gamma count rate direction is calculated using the following formula: ;

[0056] in, is the gamma count rate direction; is the formation space magnetic field vector measured by a magnetic sensor with the radial direction of the mounting frame as the measuring direction and the measuring direction being parallel to the opening direction of the measuring port; It is the spatial magnetic field vector of the formation measured by the magnetic sensor with the radial direction along the mounting frame as the measuring direction.

[0057] Furthermore, the gravity tool face angle is calculated using the following formula: ;

[0058] in, is the gravity tool face angle; and It is the stratum space gravity vector measured by two acceleration sensors with the radial direction along the mounting frame as the measuring direction.

[0059] Furthermore, the well inclination angle is calculated using the following formula: ;

[0060] in, is the well inclination angle; and is the stratum space gravity vector measured by two acceleration sensors along the radial direction of the mounting frame as the measuring direction; It is the stratum space gravity vector measured by the acceleration sensor with the axial direction of the mounting frame as the measurement direction.

[0061] Furthermore, the magnetic azimuth is calculated using the following formula: ;

[0062] in, is the magnetic azimuth; and is the stratum space gravity vector measured by two acceleration sensors along the radial direction of the mounting frame as the measuring direction; is the stratum space gravity vector measured by the acceleration sensor with the axial direction of the mounting frame as the measuring direction; is the formation space magnetic field vector measured by a magnetic sensor with the radial direction of the mounting frame as the measuring direction and the measuring direction being parallel to the opening direction of the measuring port; is the formation space magnetic field vector measured by the magnetic sensor with the radial direction of the mounting frame as the measuring direction; It is the spatial magnetic field vector of the formation measured by the magnetic sensor with the axial direction of the mounting frame as the measuring direction.

[0063] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0064] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0065] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a single-chip microcomputer, a chip or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0066] In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. An integrated sensor, characterized in that: The integrated sensor is arranged on the drilling tool (2) and is used to obtain the formation space gravity vector, the formation space magnetic field vector and the formation gamma count rate during the drilling process. The integrated sensor (1) comprises: A mounting frame (11) having an internal accommodation space, a gamma ray shielding layer (12) being provided on an outer wall of one end of the mounting frame (11), and a measurement port (121) being provided on the gamma ray shielding layer (12); Three acceleration sensors (13) are arranged in sequence in the internal accommodation space and are used to measure three mutually perpendicular directions of the stratum space gravity vectors; Three magnetic sensors (14) are arranged in sequence in the internal accommodation space and are used to measure three mutually perpendicular directions of the stratum space magnetic field vectors; A gamma sensor (15) is arranged in an internal accommodation space corresponding to the location of the gamma ray shielding layer (12), and is used to measure the formation gamma count rate through the measurement port (121).

2. The integrated sensor according to claim 1, characterized in that: The three acceleration sensors (13) and the three magnetic sensors (14) are all located on the same axis; The measuring direction of each acceleration sensor is parallel to the measuring direction of the corresponding magnetic sensor.

3. The integrated sensor according to claim 1, characterized in that: The mounting frame (11) is made of non-magnetic material; The gamma ray shielding layer (12) is made of tungsten-nickel-iron or tungsten-nickel-copper.

4. The integrated sensor according to claim 1, characterized in that: The gamma ray shielding layer (12) is tungsten nickel iron; The distance between the magnetic sensor (14) and the gamma ray shielding layer (12) is greater than 40 cm, with the axial direction of the mounting frame as the measuring direction.

5. The integrated sensor according to claim 1, characterized in that: The acceleration sensor (13) is a quartz flexible acceleration sensor or a MEMS acceleration sensor; The magnetic sensor (14) is a fluxgate sensor or a giant magnetoresistance sensor; The gamma sensor (15) is a sodium iodide, bismuth germanate or gadolinium silicate gamma crystal sensor.

6. A method for determining formation drilling parameters, characterized in that: The method comprises: The integrated sensor according to any one of claims 1 to 5 is used to collect the formation space gravity vector and the formation space magnetic field vector of the formation during the drilling process; Based on the formation space gravity vector and the formation space magnetic field vector, formation drilling parameters are obtained, and the formation drilling parameters include: gamma count rate direction, gravity tool face angle, well inclination angle and magnetic azimuth.

7. The method for determining formation drilling parameters according to claim 6, characterized in that: The gamma count rate direction is calculated using the following formula: ； in, is the gamma count rate direction; is the formation space magnetic field vector measured by a magnetic sensor with the radial direction of the mounting frame as the measuring direction and the measuring direction being parallel to the opening direction of the measuring port; It is the spatial magnetic field vector of the formation measured by the magnetic sensor with the radial direction along the mounting frame as the measuring direction.

8. The method for determining formation drilling parameters according to claim 6, characterized in that: The gravity tool face angle is calculated using the following formula: ； in, is the gravity tool face angle; and It is the stratum space gravity vector measured by two acceleration sensors with the radial direction along the mounting frame as the measuring direction.

9. The method for determining formation drilling parameters according to claim 6, characterized in that: The well inclination angle is calculated using the following formula: ； in, is the well inclination angle; and is the stratum space gravity vector measured by two acceleration sensors along the radial direction of the mounting frame as the measuring direction; It is the stratum space gravity vector measured by the acceleration sensor with the axial direction of the mounting frame as the measurement direction.

10. The method for determining formation drilling parameters according to claim 6, characterized in that: The magnetic azimuth is calculated using the following formula: ； in, is the magnetic azimuth; and is the stratum space gravity vector measured by two acceleration sensors along the radial direction of the mounting frame as the measuring direction; is the stratum space gravity vector measured by the acceleration sensor with the axial direction of the mounting frame as the measuring direction; is the formation space magnetic field vector measured by a magnetic sensor with the radial direction of the mounting frame as the measuring direction and the measuring direction being parallel to the opening direction of the measuring port; is the formation space magnetic field vector measured by the magnetic sensor with the radial direction of the mounting frame as the measuring direction; It is the spatial magnetic field vector of the formation measured by the magnetic sensor with the axial direction of the mounting frame as the measuring direction.

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