28 results about "Sonic logging" patented technology

This invention relates to the field of well logging data processing technology, and particularly to a method, system, and apparatus for improving the resolution of well logging data in thin sand layers. The method includes the following steps: S1, acquiring well logging data from thin sand layers in the area to be analyzed; S2, performing data preprocessing; S3, using wavelet transform technology for multi-resolution analysis to extract characteristic signals of the thin sand layers and enhance their resolution; S4, using a chart correction method to improve accuracy; S5, evaluating whether the characteristic signals of the thin sand layers processed in step S4 are acceptable. If the evaluation is unacceptable, steps S1-S5 are iteratively performed until the evaluation is acceptable. When the evaluation is acceptable, it indicates that the characteristic signals of the thin sand layers processed in step S4 represent well logging data with improved resolution. This achieves rapid and accurate high-resolution processing of acoustic logging data.

This invention discloses a method and system for measuring the performance indicators of an acoustic logging transducer, belonging to the field of geophysical logging technology. The method derives an admittance circle measurement method using an equivalent lumped system of the transducer; an admittance circle measurement system is constructed based on this method; the electrical parameters of the transducer are measured using this system to obtain the transducer admittance curve and admittance circle diagram; and the transducer's performance indicators are calculated based on these diagrams. This invention provides more accurate measurement results and simplifies the operation of testing the admittance circle and performance indicators of the transducer.

This application discloses a rapid positioning device for sonic logging tubes in pile foundations, comprising a pile hole, a reinforcing cage disposed within the pile hole, the reinforcing cage including a plurality of vertical main bars spaced circumferentially and a plurality of outer stirrups welded to the outside of the vertical main bars at vertical intervals, and further including: a plurality of inner stirrups welded to the inside of the vertical main bars at vertical intervals; a positioning member connected to the inner stirrups to position the sonic logging tube; and a connecting member, one end of which is welded to the inner stirrup, and the other end of which is welded to the positioning member. The inner and outer stirrups work together to form a double constraint, thereby enhancing the overall rigidity and shape stability of the reinforcing cage. The connecting member, as a rigid connecting arm, together with the positioning member, ensures that the sonic logging tube maintains a constant preset distance from the main body of the reinforcing cage in the vertical direction, which is beneficial for the effective transmission of ultrasonic signals and for improving the quality of the final bridge pile body.

The utility model discloses a sounding pipe structure with a protection structure, which relates to the technical field of sounding pipes, and comprises a pipe body, a protection end cover is sleeved on the pipe body, a second clamp is clamped outside the protection end cover, a second clamp is sleeved outside the pipe body, and the second clamp is clamped outside the protection end cover. And an elastic buffer piece is arranged between the second clamp and the first clamp. According to the sounding pipe structure with the protection structure, the elastic buffering piece is arranged between the second clamp and the first clamp on the sounding pipe, buffering can be conducted through the elastic buffering piece when the sounding pipe is impacted, and then the sounding pipe can be protected.

This invention discloses an integrated logging-while-drilling (LOD) and measurement drill string assembly, relating to the field of oil and gas drilling engineering technology. It provides a series connection scheme for core protective drill string components, offering two switchable configurations: one with a mud motor and one without. Both configurations consist of an azimuth density neutron logging sub, a bidirectional communication power supply sub, an acoustic logging sub, a resistivity logging sub, an upper connecting sub, a flexible sub, a lower connecting sub, an azimuth gamma logging sub, and a steering actuator connected in series according to a fixed logic. The configuration with a mud motor only requires adding a mud motor at a designated location to complete the structural switch, without changing the series connection of the remaining subs. This assembly scheme is applicable to various drilling scenarios such as offshore exploration and development, deepwater drilling, complex directional wells, highly deviated wells, and horizontal wells. It enables integrated operations of geological steering, formation evaluation, and wellbore stability analysis during drilling, effectively improving drilling efficiency and reducing operational risks.

This utility model proposes a sealing joint for connecting sonic logging pipes, relating to the field of sonic logging pipe sealing test technology. It includes a sonic logging pipe body and a water pressure resistance testing device, as well as an upper mounting block, a lower mounting block, a wedge block, a column, a through hole, a flow hole, an internal pressure connection assembly, a mounting cylinder, a wedge groove, and an adjustable sealing assembly. This application can not only seal both ends of the sonic logging pipe body, but also apply internal pressure along the axial direction of the sonic logging pipe to further improve the sealing effect. Furthermore, the adjustable sealing assembly allows for sealing of sonic logging pipes of different specifications after installation, meeting and adapting to the sealing test requirements of diverse specifications of sonic logging pipes in different projects. Therefore, the sonic logging pipe sealing joint has a better performance.

The present application relates to the technical field of acoustic logging, and particularly relates to a high-stability wide-frequency distributed optical fiber acoustic wave sensing logging method and system. The method comprises the following steps: acquiring logging requirements and downhole geological structure characteristic data, simultaneously collecting corresponding acoustic wave signals, temperature field distribution signals and wellbore structure stress signals, and performing preliminary denoising and synchronization processing and wide-frequency expansion and distortion compensation processing, to generate downhole wide-frequency enhanced acoustic wave signals; based on the downhole wide-frequency enhanced acoustic wave signals, performing downhole propagation stability evaluation and stable adaptive optimization adjustment, to generate corresponding high-stability wide-frequency acoustic wave sensing signals; based on the high-stability wide-frequency acoustic wave sensing signals, performing distributed optical fiber acoustic wave sensing logging analysis, to generate corresponding geological structure and reservoir characteristic logging information. The present application can solve the problems of bandwidth limitation, signal distortion and poor stability of traditional optical fiber acoustic logging in a complex downhole environment, so as to realize high-precision detection of oil and gas reservoirs.

The application discloses a design method and device of a low-frequency transducer, and the method comprises the following steps: obtaining specification size information and detection characteristics of a sonic logging instrument; the specification size information comprises geometric size parameters and environmental tolerance parameters; the detection characteristics comprise measured sound wave types and detection depths; determining the size of a single piezoelectric ceramic sheet in the low-frequency transducer of the sonic logging instrument according to the specification size information; determining the working frequency band of the low-frequency transducer according to the detection characteristics; determining the number of piezoelectric ceramic sheets in the low-frequency transducer according to the working frequency band; and obtaining the design scheme of the low-frequency transducer of the sonic logging instrument according to the size, the number and a preset piezoelectric ceramic sheet physical connection mode. The application can meet the excitation demand of low-frequency sound waves.

This invention provides a low-frequency monopole acoustic logging transducer, acoustic logging instrument, and system, belonging to the field of geological exploration technology. The low-frequency monopole acoustic logging transducer includes: a circumferential frame and an even number of dipole triplet plates, which are vertically mounted on the circumferential frame in a circumferential array. Each dipole triplet plate includes: a metal substrate, a first piezoelectric material element, and a second piezoelectric material element. The first piezoelectric material element is disposed on the upper surface of the metal substrate, and the second piezoelectric material element is disposed on the lower surface of the metal substrate relative to the upper surface. The even number of dipole triplet plates arranged in a circumferential array allows the overall circumferential monopole logging transducer to expand and contract radially to generate a symmetrical sound field. By using dipole triplet plates to reduce the fundamental frequency of vibration through axial space, a low-frequency acoustic signal is obtained, thereby more accurately acquiring Stoneley wave information from the formation and increasing the detection depth.

This invention proposes a logging-while-drilling (LWD) acoustic receiver, its manufacturing method, and its usage method, comprising: a drill collar skeleton, the drill collar skeleton being a hollow cylindrical structure with a water inlet in its center; an arc-shaped frame support, the arc-shaped frame support being evenly arranged circumferentially on the sidewalls of the drill collar skeleton, and receiving transducers being disposed on the arc-shaped frame support, the receiving transducers being evenly arranged circumferentially on the drill collar skeleton; wherein, a watertight insulating prestressed layer is provided on the outer surface of the arc-shaped frame support, which seals and fixes the receiving transducers.

This invention provides an acoustic logging azimuth receiver assembly and an acoustic logging instrument, belonging to the technical field of logging devices. It includes: a mandrel with multiple transverse sound-insulating grooves spaced along its length; multiple receiving transducer assemblies spaced along the mandrel's length; each receiving transducer assembly includes: a base fitted onto the mandrel; at least one receiving transducer mounted on the base via a mounting mechanism; and a locking mechanism mounted on the base for fixing the mounting mechanism to the base. This invention features a simple structure, small size, applicability to various logging instruments, wide applicability, high receiving sensitivity, and compatibility with both azimuth receiving transducers and conventional receiving transducers.

This invention discloses a method for inverting the velocity of the cemented medium behind the casing based on ultrasonic Lamb waves, relating to the field of geophysical logging. This invention utilizes a back-casing scanning imaging logging instrument to perform ultrasonic Lamb wave logging and ultrasonic pulse reflection logging at various depth points, acquiring waveform records at each depth point. The casing thickness and acoustic impedance of the cemented medium behind the casing at specified azimuths are inverted and calculated. Based on the ultrasonic Lamb wave logging waveform records, Fourier transforms are performed on the near-curved and far-curved Lamb wave full-wave waveforms at each specified azimuth of each depth point, calculating the phase difference between near and far-curved Lamb waves and performing group delay processing. Combining this with the operating frequency band of the back-casing scanning imaging logging instrument, the frequency values ​​corresponding to the minimum values ​​of the group delay at each azimuth of each depth point are obtained. After obtaining the frequency set, the wave velocity and medium type of the cemented medium behind the casing are determined based on the frequency values, the number of minimum frequencies, and the acoustic impedance values ​​at each azimuth of the frequency set.

The application provides a sandstone type uranium ore prediction method based on pseudo-three-dimensional seismic data. The method comprises the following steps: a. obtaining two-dimensional seismic SGY profile data of a working area; b. performing trace head analysis on the SGY profile data; c. obtaining point coordinate data; d. processing the point coordinate data; e. processing the SGY profile data; f. collecting gamma and acoustic logging curves of the working area; g. processing the logging curve data; h. performing multi-parameter lithology inversion according to the processed SGY data and the logging curve data; and i. predicting a favorable sandstone type uranium ore forming area. The application fully utilizes two-dimensional seismic data, acoustic logging data and gamma logging data sensitive to sandstone type uranium ore to accurately and effectively predict the favorable sandstone type uranium ore forming area, reduces the uranium resource key exploration range in the working area, provides geophysical prospecting basis for subsequent drilling construction, greatly reduces the exploration cost and improves the exploration efficiency.

This utility model relates to the field of sonic logging pipe docking technology, specifically to a sonic logging pipe docking and sealing installation clamp. It includes a sonic logging pipe body, with two pipe bodies docked and sealed using a docking clamp mechanism. The docking clamp mechanism includes a docking component and a locking component. The docking component includes a sleeve, with threaded tapered sleeves and docking sleeves at both ends. A sealing ring is embedded in the inner wall of the threaded tapered sleeve. The locking component is fitted onto the outer side of the threaded tapered sleeve and threadedly connected to it. This sonic logging pipe docking and sealing installation clamp, through the cooperation of the docking component, locking component, and locking mechanism, ensures a neat docking of the sonic logging pipe bodies by fitting them onto the docking sleeve. The sealing ring and sealing collar effectively prevent leakage, achieving the purpose of aligning and sealing the connection points of the sonic logging pipe bodies.

The application provides a rock mechanics parameter determination method, and belongs to the field of oil and gas exploration and development. The method comprises the following steps: performing a point load experiment on a core of coring rock to measure the static uniaxial compressive strength of the rock; calculating the reservoir dynamic uniaxial compressive strength of the rock by using acoustic logging data, and fitting the two to obtain a dynamic-static uniaxial compressive strength fitting model; calculating the static uniaxial compressive strength of the rock for which the core cannot be obtained by using the dynamic-static uniaxial compressive strength fitting model, and calculating the formation elastic modulus of the rock according to the static compressive strength; and calculating the formation Poisson's ratio of the rock according to the drilling mechanical specific energy value, density logging and minimum horizontal stress data of the formation in which the rock is located. The application uses a point load experiment combined with a related empirical formula, uses the obtained core to analyze the rock mechanics parameters of other rocks for which the core cannot be obtained, and provides basic data support for drilling and completion, oil and gas exploitation design and construction.

This utility model discloses a non-destructive testing device for existing bridge foundation piles, comprising a pre-embedded transparent sonic logging tube and a detector. The transparent sonic logging tube is embedded in the foundation pile at the bottom of the pile cap, and an inlet communicating with the transparent sonic logging tube is provided on the pile cap. The detector includes a cable, an endoscope probe, and an ultrasonic probe. The cable is connected to the endoscope probe and the ultrasonic probe, and the detector is inserted into the transparent sonic logging tube through the inlet. This utility model, by providing an inlet on the pile cap and designing the sonic logging tube to be transparent, and by combining an endoscope probe and an ultrasonic probe with the detector, can continuously perform imaging inspection of the foundation pile concrete. Furthermore, the sonic logging tube is not concealed or covered after the pile cap construction is completed, and can continue to be used for long-term, continuous acoustic transmission testing and endoscopic imaging inspection through the inlet and the sonic logging tube.

Aspects provide for methods that successfully evaluates multiple compressional and shear arrival events received by a sonic logging tool to evaluate the presence of structures, such as shoulder beds, in downhole environments. In particular, the methods described herein enable automated determination of properties of laminated reservoir formations by, for example, enabling the automated determination of arrival times and slownesses of multiple compressional and shear arrival events received by a sonic logging tool.

This utility model discloses an ultrasonic testing device for pile foundations, including a positioning component and a fixing plate. The fixing plate is fixedly connected to the top surface of the ultrasonic testing instrument, and its outer periphery protrudes beyond the outer periphery of the ultrasonic testing instrument. The outer periphery of the fixing plate is smaller than the inner diameter of the sonic logging tube. The positioning component includes an integrally formed sleeve and a collar. The central axes of the sleeve and the collar coincide with the central axis of the sonic logging tube. The sleeve is inserted tightly into the sonic logging tube, and the collar rests on the top of the sonic logging tube. A mounting plate is also provided on the collar, on which a positioning wheel is mounted. The traction connection line of the ultrasonic testing instrument is guided upward from the inside of the sonic logging tube through the positioning wheel. The positioning wheel has a concave guide arc surface, and its surface tangent coincides with the central axis of the sonic logging tube. This utility model achieves stability and reliability of the ultrasonic testing instrument during lowering and raising, while maintaining as much overlap as possible with the pile foundation axis, thereby ensuring the accuracy of the test results.

This invention discloses an enhanced connection device and method for achieving long-term sealing of sonic logging pipe joints, comprising: a sonic logging pipe and a sonic logging pipe joint; adjacent sonic logging pipes are connected by the sonic logging pipe joint; a sealing tape is wrapped around the outer surface of the sonic logging pipe joint; the two ends of the sealing tape extend to the outer surfaces of the two sonic logging pipes at both ends of the sonic logging pipe joint, respectively, for sealing the connection between the sonic logging pipe and the sonic logging pipe joint. This invention is applicable to sonic logging pipes of all joint types, has low cost, is convenient to construct, effectively prevents mud and cement slurry in the trench from seeping into the sonic logging pipe, improves the survival rate of the sonic logging pipe, reduces the burial rate, and lowers construction costs.

This invention discloses a cement sheath micro-gap pressure testing device, method, data, medium, and application, relating to the field of oil and gas well sealing technology. It includes an outer casing and an inner casing, with the outer casing fitted over the outer side of the inner casing, forming an annular cavity between them; a sealing element that seals the inner cavity of the inner casing; a pressure injection system connected to the inner cavity of the inner casing; a pressure control system connected to the pressure injection system; an acoustic logging tool housed within the inner cavity of the inner casing; a logging control system connected to the acoustic logging tool; a micro-gap size acquisition system; and a data association system. This invention can simulate the generation and evolution process of cement sheath micro-gap under varying downhole pressure conditions, establish a calibration relationship between acoustic response and micro-gap state, and provide experimental basis for evaluating cement sheath sealing integrity and optimizing cementing quality.

The utility model relates to the technical field of acoustic logging instruments, in particular to a novel delay body structure suitable for an acoustic velocity measuring probe for solid mineral exploration, which comprises a first delay body, a connecting sleeve is sleeved at one end of the first delay body, and a second delay body is arranged in the other end of the connecting sleeve. The second sound delaying body and the first sound delaying body are both fixedly connected with abutting rings, the second sound delaying body and the first sound delaying body are both sleeved with fixing bases, one fixing base is fixedly connected with a receiving crystal, the other fixing base is fixedly connected with an emitting crystal, and the two fixing bases are fixed through a fixing mechanism. According to the sound delay structure, the sound wave duration delay effect in the logging instrument is improved, the mechanical strength of the sound delay structure is enhanced, data measured by the instrument is more accurate, and the anti-seismic performance is more reliable.

This invention relates to the field of acoustic logging technology, specifically disclosing an acoustic logging method and system for cased wells. The method includes: acquiring the position signal of an acoustic transmitter within the cased well and the reflected acoustic signal; determining whether the reflected acoustic signal includes formation wave signals that are not distorted by the well media; converting the undesirable wave signal into a first electrical control signal, calculating the position of the undesirable wave signal based on the acoustic transmitter position signal and the reflected acoustic signal, and controlling the acoustic transmitter to rotate closer to the undesirable wave signal position until a good wave signal is generated; or converting the good wave signal into a second electrical control signal, controlling the acoustic transmitter to rotate back to its original position based on the acoustic transmitter position signal, and continuing logging until the undesirable wave signal is acquired again, repeating the above control steps. This method can autonomously adjust the position of the acoustic transmitter even when the signal data is interfered with, improving the accuracy of detection.

The utility model belongs to the technical field of detection equipment, particularly relates to a concrete pouring detection auxiliary device, and provides the following scheme aiming at the problems that an existing transducer collides with the inner wall of a sounding pipe and additional measurement equipment needs to be added, the concrete pouring detection auxiliary device comprises the sounding pipe and the transducer, a clamping assembly is clamped on the transducer, and the clamping assembly comprises a clamping ring. The inner wall of the clamping ring is connected with the outer wall of the top end of the transducer, the clamping ring is connected with a supporting rod, the top end of the supporting rod is connected with a detection rope, and the two T-shaped ends of the supporting rod are connected with telescopic assemblies respectively. The other ends of the two telescopic assemblies are connected with pulley bases respectively, pulleys are arranged on the two pulley bases respectively, and the pulleys roll on the inner wall of the sounding pipe. According to the concrete pouring detection auxiliary device, in the moving process of the energy converter, the energy converter can be effectively prevented from inclining or colliding with the inner wall of the sounding pipe, the accuracy of the detection result can be improved, and the energy converter can be prevented from being damaged.

The present application belongs to the technical field of oil and gas exploration and development, and discloses a kind of cap rock natural gas capillary sealing mechanism identification and evaluation method, including the judgment of cap rock natural gas capillary sealing mechanism based on multidimensional data;Cap rock natural gas capillary sealing mechanism evaluation model is constructed;Through density logging, neutron logging and acoustic logging data, gas-bearing layer is identified, and the gas saturation of gas-bearing layer is calculated through density logging and neutron logging data;The breakthrough pressure of sandstone and mudstone is calculated;Based on the number of layers of gas-bearing layer, gas saturation, sandstone breakthrough pressure and mudstone breakthrough pressure, cap rock natural gas capillary sealing mechanism evaluation model is substituted to obtain cap rock natural gas capillary sealing mechanism evaluation parameter.The present application can identify and evaluate the area that part of cap rock sealing capacity is less affected by physical property, overpressure and hydrocarbon concentration and mainly controlled by natural gas capillary sealing mechanism.

This utility model discloses a shared device for sonic logging pipes and post-grouting pipes in engineering pile foundations. It includes multiple sonic logging and post-grouting pipes detachably installed on the stirrups of a reinforcing cage, and further includes: a plug detachably installed at the top of the shared pipes; and a grouting joint connected to the bottom of the shared pipes. Several grouting holes are drilled through the grouting joint, and each grouting hole outlet is equipped with an anti-clogging cap that can be opened and closed to reduce the probability of mud and sand entering the pile body and causing blockage. This utility model has a simple structure and a novel and reasonable design, achieving the dual purpose of serving as both an integrity testing channel and a grouting pipe. It prevents soil or gravel from entering the shared pipes and allows for more uniform injection of grouting material into them.

Aspects of the subject technology relate to systems, methods, and computer-readable media for synthesizing sonic logs for downhole environments. Data associated with a wellbore in a formation is accessed. A model configured to identify one or more characteristics associated with sound traveling through one or more formation is accessed. The data is applied to the model to predict a characteristics of the formation that is identifiable through sonic logging.

This invention relates to the field of geothermal well sand production identification technology, and discloses an intelligent method and system for identifying sand-producing layers in geothermal wells. The method includes: collecting sonic logging, resistivity, and gamma-ray data from the geothermal well to form a raw data set; extracting multi-dimensional features from the data to obtain a set of feature parameters composed of sonic transit time, resistivity gradient, and gamma-ray anomaly features; constructing a dynamic formation model based on this set to characterize formation characteristics at different depth intervals; comparing the model with a preset standard formation characteristic library to identify target depth intervals with significant differences; analyzing formation parameter variation trends based on historical sand production records to determine potential sand-producing layers; calculating formation stability indices to generate sand production risk levels, and correcting the risk levels based on real-time downhole monitoring data; finally generating an identification report containing a description of formation characteristics and sand production risk distribution at the target depth interval, and outputting targeted sand production prevention and control suggestions.