CN104483707B - A kind of single dipole mixed method and device for being used to far detect well logging - Google Patents

Abstract

The present invention relates to a single-dipole hybrid method and device for remote detection logging, comprising: a sound source and at least one receiver are arranged in the well to be detected; when the sound source excites the wave field, the first receiving unit collects the first Logging data, the second receiving unit collects the second logging data, the third receiving unit collects the third logging data, and the fourth receiving unit collects the fourth logging data; for the first logging data, the second logging data, The third logging data and the fourth logging data are combined to obtain monopole receiving data, X direction and Y direction dipole receiving data; according to the form of sound source and monopole receiving data, X direction dipole receiving data Data, receive data with dipole type in Y direction, and obtain conventional logging data and remote detection logging data. The embodiment of the present invention can greatly increase the amplitude of the reflected wave outside the well relative to the direct wave in the well, and then accurately and effectively image the geological structure outside the well.

Description

A single dipole hybrid method and device for remote detection logging

technical field

The invention relates to the field of geophysical logging, in particular to a logging method and device based on a monopole-dipole hybrid working mode.

Background technique

With the continuous deepening of oil and gas exploration and development, people have higher and higher requirements for the resolution and accuracy of geophysical data. Although the resolution and accuracy of conventional logging technology are high, but limited by the detection range and Well technology cannot detect areas other than near the borehole wall.

The technology of reflecting wave imaging of stratum structures and geological bodies in the range of several meters to tens of meters around the well through acoustic logging in the well is called remote detection technology. Raise it up to tens of meters. The application prospect of this remote detection technology is very great. It can be used to display the geological interface intersected with the well; detect the inclined formation interface, fracture, fault, etc. beside the well; it can also be used to track the boundary of the oil reservoir in the horizontal well.

There are two types of sound wave detection technology: monopole longitudinal wave method and dipole shear wave method. The monopole longitudinal wave method uses the longitudinal wave radiated from the monopole sound source in the well to the outside of the well, and uses the monopole to receive the reflected wave reflected back into the well by the reflector outside the well. The sound source frequency of the monopole longitudinal wave is generally around 10kHz, but the The wave attenuation of the frequency causes the detection range of the monopole longitudinal wave method to be limited, ranging from a few meters to tens of meters, and due to the non-directionality of the radiation of the monopole sound source, it is impossible to determine the orientation of the reflector; the dipole shear wave method is The long-distance detection technology developed in recent years uses a frequency of about 3-5kHz or even lower. Due to the low frequency, this method has a deeper detection distance, which can reach a range of tens of meters. In addition, due to the dipole The directivity of the sound source is directional, and this method can not only determine the position of the emitter, but also determine its direction.

However, acoustic remote detection in wells has great limitations both for the monopole longitudinal wave method (monopole excitation and monopole reception) and the recently developed dipole shear wave method (dipole excitation and dipole reception). , that is, compared with the wellbore mode wave, the reflected signal is generally small, and is often superimposed with the wellbore mode wave, which will be suppressed or lose details during digitization, especially if the reflected wave and the direct wave overlap in arrival time, it is relatively The weak reflected wave signal may be submerged in the direct wave, so the current far detection working mode is often not satisfactory in actual data processing, which limits the widespread use of the existing acoustic far detection technology.

Contents of the invention

The purpose of the present invention is to solve the problem that in the existing well logging technology, the reflected wave signal is generally very small, and is often superimposed with the mode wave in the well, which will be suppressed or lost during digitization, especially if the reflected wave and the direct wave arrive at When overlapping, the weaker reflected wave signal may be submerged in the direct wave.

In the first aspect, the embodiment of the present invention provides a single-dipole hybrid method for remote detection logging, the method includes: arranging a sound source and at least one receiver in the well to be detected, wherein the receiver includes Four receiving units arranged at equal intervals in the circumferential direction, the first receiving unit and the third receiving unit among the four receiving units are located on the X axis, and the second receiving unit and the fourth receiving unit among the four receiving units are located on the Y-axis;

When the sound source excites the wave field, the first receiving unit collects first logging data, the second receiving unit collects second logging data, the third receiving unit collects third logging data, and the fourth receiving unit collects The fourth logging data;

Combining the first well logging data, the second well logging data, the third well logging data and the fourth well logging data to obtain monopole receiving data, X direction dipole receiving data and Y direction dipole receiving data data;

According to the form of the sound source and the monopole-type received data, the X-direction dipole-type received data, and the Y-direction dipole-type received data, conventional well logging data and remote detection well logging data are obtained.

Preferably, the sound source specifically includes: a monopole source or a dipole source.

Preferably, the first well logging data, the second well logging data, the third well logging data and the fourth well logging data are combined to obtain monopole receiving data, X direction dipole receiving data and Y Directional dipole type receiving data specifically includes:

Adding the first well logging data, the second well logging data, the third well logging data and the fourth well logging data to obtain unipolar receiving data;

Subtracting the first logging data and the third logging data to obtain dipole receiving data in the X direction;

and subtracting the second well logging data from the fourth well logging data to obtain dipole receiving data in the Y direction.

Preferably, when the sound source is a monopole source, the monopole-type received data is conventional logging data, and the X-direction dipole-type received data and the Y-direction dipole-type received data are far-detection data well logging data.

Preferably, when the sound source is a dipole source, the monopole-type received data is far detection logging data, and the X-direction dipole-type received data and the Y-direction dipole-type received data are conventional well logging data.

In the second aspect, the embodiment of the present invention provides a single-dipole hybrid device for remote detection logging, the device includes: an arrangement unit, an acquisition unit, a combination unit, and a generation unit;

The arrangement unit is used to arrange the sound source and at least one receiver in the well to be detected, wherein the receiver includes four receiving units arranged at equal intervals in the circumferential direction, and the first receiving unit in the four receiving units and the third receiving unit is located on the X axis, and the second receiving unit and the fourth receiving unit among the four receiving units are located on the Y axis;

The acquisition unit is configured to collect first logging data by the first receiving unit, collect second logging data by the second receiving unit, and collect third logging data by the third receiving unit when the sound source excites the wave field. data, the fourth receiving unit collects fourth logging data;

The combining unit is used to combine the first well logging data, the second well logging data, the third well logging data and the fourth well logging data to obtain monopole receiving data and dipole receiving data in the X direction and Y direction dipole type to receive data;

The generating unit is used to obtain conventional logging data and remote detection logging data according to the form of the sound source and the monopole receiving data, X direction dipole receiving data, and Y direction dipole receiving data .

Preferably, the sound source specifically includes: a monopole source or a dipole source.

Preferably, the combining unit is specifically configured to add the first well logging data, the second well logging data, the third well logging data and the fourth well logging data to obtain unipolar receiving data;

Subtracting the first logging data and the third logging data to obtain dipole receiving data in the X direction;

and subtracting the second well logging data from the fourth well logging data to obtain dipole receiving data in the Y direction.

Preferably, the generating unit is specifically configured to, when the sound source is a monopole source, the monopole type received data is conventional logging data, the X direction dipole type received data and the Y direction The dipole type received data is far detection logging data.

Preferably, the generation unit is specifically configured to, when the sound source is a dipole source, the monopole type received data is far detection logging data, the dipole type received data in the X direction and the Y The data received by the directional dipole type are conventional logging data.

The present invention introduces a new data acquisition mode (monopole-dipole mixed work), the amplitude of the reflected wave outside the well is enhanced relative to the direct wave in the well, which is beneficial to the extraction and separation of reflected wave signals; in addition, due to the instrument gain Not affected by the direct wave in the high-amplitude well, the reflected wave signal can be effectively amplified in the well, which improves the quantification accuracy of the reflected wave and suppresses the transmission noise, and further improves the accuracy and reliability of the remote detection technology; second, For reflectors that are close to the detection well, in the conventional data acquisition mode, the direct wave in the well and the reflected wave outside the well overlap seriously, and it is difficult to effectively separate them. Furthermore, different remote detection instruments have certain detection blind spots. By introducing new data Acquisition mode can also accurately record the reflection signals corresponding to the reflectors in the detection blind zone, which improves the ability of long-distance detection to identify the reflection interface near the borehole wall; third, in the current acoustic logging technology, sometimes it is necessary to complete conventional Logging tasks, such as measurement of formation velocity, also require imaging of off-hole reflectors. In this case, in order to record the information of the direct wave in the well and the reflected wave outside the well at the same time, it is necessary to adopt an ultra-long logging record length, which in turn causes a large data transmission pressure, and accordingly affects the efficiency of conventional logging operations. speed. The invention separates the collection of conventional well logging data from the collection of remote detection data by introducing a single-pole-dipole mixed working mode, and they do not affect each other and are carried out in parallel. In this way, data acquisition and transmission can be performed according to the needs of logging operations: if only conventional logging operations are required, digitize the part of the conventional logging record length in the received data (monopole or dipole received data) And it can be transmitted to the surface acquisition system in real time, which ensures the speed of conventional logging operations. However, if it is necessary to collect conventional logging data and remote detection logging data at the same time, the remote detection logging data is collected with a longer acquisition window, and is selected for real-time transmission or centralized transmission after being stored in the instrument according to the transmission speed of the cable; Acquisition and transmission are performed using conventional logging data acquisition lengths.

Description of drawings

Fig. 1 is the flow chart of logging method that the embodiment of the present invention provides;

Fig. 2 is a schematic diagram of the arrangement of each receiving unit in the receiver provided by the embodiment of the present invention;

Fig. 3 is a schematic diagram of a combination of receiving units provided by an embodiment of the present invention;

Fig. 4a is the logging type corresponding to the monopole type receiving data, the X direction dipole type receiving data, and the Y direction dipole type receiving data when the monopole source is provided by the embodiment of the present invention;

Fig. 4b is the logging type corresponding to the monopole type receiving data, the X direction dipole type receiving data, and the Y direction dipole type receiving data when the dipole source provided by the embodiment of the present invention;

Fig. 5 is a schematic diagram of a remote detection calculation model provided by an embodiment of the present invention;

Fig. 6 is a conventional logging waveform when the monopole source provided by the embodiment of the present invention;

Fig. 7 is the long-distance detection logging waveform when the monopole source is provided by the embodiment of the present invention;

Fig. 8 is the waveform obtained by subtracting the respective waveforms of the receiving units P1 and P3 at a distance of 4.5m from the sound source when the monopole source is provided by the embodiment of the present invention;

Fig. 9 is a conventional logging waveform when the dipole source provided by the embodiment of the present invention;

Fig. 10 is the long-distance detection logging waveform when the dipole source provided by the embodiment of the present invention;

Fig. 11 is a schematic diagram of a logging device provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to facilitate the understanding of the embodiments of the present invention, further explanations will be given below with specific embodiments in conjunction with the accompanying drawings, which are not intended to limit the embodiments of the present invention.

The logging method provided by the embodiment of the present invention will be described in detail below by taking FIG. 1 as an example. FIG. 1 is a flow chart of the logging method provided by the embodiment of the present invention. As shown in Figure 1, this embodiment specifically includes the following steps:

S101, arrange the sound source and at least one receiver in the well to be detected, wherein the receiver includes four receiving units arranged at equal intervals in the circumferential direction, the first receiving unit and the third receiving unit in the four receiving units Located on the X axis, the second receiving unit and the fourth receiving unit among the four receiving units are located on the Y axis;

Specifically, as shown in FIG. 2 , FIG. 2 is a schematic diagram of an arrangement manner of receiving units in a receiver provided by an embodiment of the present invention. In Fig. 2, multiple receivers are included, and each receiver includes a first receiving unit P1, a second receiving unit P2, a third receiving unit P3 and a fourth receiving unit P4, and the positional relationship of the four receiving units is shown in Fig. As shown, in a detection well where the well axis is the Z axis, the first receiving unit P1 and the third receiving unit P3 can be set on the X axis, and the second receiving unit P2 and the fourth receiving unit P4 can be set on the Y axis.

S102. When the sound source excites the wave field, the first receiving unit collects first well logging data, the second receiving unit collects second well logging data, the third receiving unit collects third well logging data, and the fourth receiving unit The unit collects fourth logging data;

Specifically, the sound source may be a monopole source or a dipole source.

S103. Combine the first well logging data, the second well logging data, the third well logging data and the fourth well logging data to obtain monopole receiving data, X direction dipole receiving data and Y direction dipole to receive data;

Specifically, as shown in FIG. 3, the first well logging data, the second well logging data, the third well logging data and the fourth well logging data are added together to obtain unipolar receiving data, and the first well logging data The well data and the third well logging data are subtracted to obtain the dipole receiving data in the X direction, and the second logging data and the fourth logging data are subtracted to obtain the dipole receiving data in the Y direction.

S104, according to the form of the sound source and the monopole-type received data, the X-direction dipole-type received data, and the Y-direction dipole-type received data, obtain conventional logging data and remote detection logging data.

Specifically, as shown in Figure 4a, when the sound source is a monopole source, the monopole type received data is conventional logging data, the X direction dipole type received data and the Y direction dipole type The received data is remote detection logging data.

Among them, for the monopole source, the monopole type received data records conventional logging data, while the dipole type received data in the X and Y directions is the far detection logging data that suppresses the direct wave in the well.

As shown in Figure 4b, when the sound source is a dipole source, the monopole-type received data is far detection logging data, the X-direction dipole-type received data and the Y-direction dipole-type received data The data are conventional logging data.

Among them, for the dipole source, the monopole type receiving data records the far detection logging data, while the dipole type receiving data in the X and Y directions records the conventional dipole logging data.

The above shows that the conventional logging data is collected through the general working mode of the current acoustic logging technology, that is, the monopole source excites the monopole receiver, and the dipole source excites the dipole receiver. The remote detection logging data is obtained through the monopole-dipole mixed working mode, that is, the monopole source excites the dipole receiver, and the dipole source excites the monopole receiver. The monopole-dipole mixed working mode in the embodiment of the present invention can separately collect the direct wave in the well and the reflected wave outside the well according to the requirements of the actual logging operation, and proceed in parallel without interfering with each other. Subsequent data processing is very beneficial.

S105, performing data transmission and processing on conventional well logging data and remote detection well logging data respectively.

Specifically, the conventional logging data can be transmitted in real time and processed on site, and the conventional logging processing software can be used for evaluation. For remote detection logging data, if the data transmission speed meets the requirements, it will be transmitted in real time; if the transmission speed cannot meet the requirements, it will be stored in the instrument, and then read collectively after all measurements are completed, processed in a unified manner, and applied to the remote The detection log processing software was evaluated.

The logging method provided by the embodiment of the present invention introduces a new data acquisition mode (monopole-dipole hybrid operation), and the amplitude of the reflected wave outside the well is enhanced relative to the direct wave in the well, which is beneficial to the extraction and processing of reflected wave signals. In addition, since the instrument gain is not affected by the direct wave in the high-amplitude well, the reflected wave signal can be effectively amplified in the well, increasing the amplitude of the reflected wave outside the well relative to the direct wave in the well, improving the quantification accuracy of the reflected wave and improving the transmission Noise suppression, and then accurate and effective imaging of the geological structure outside the well, further improving the accuracy and reliability of the remote detection technology; second, for reflectors close to the detection well, in the conventional data acquisition mode, the well The direct wave overlaps seriously with the reflected wave outside the well, and it is difficult to effectively separate them. Furthermore, different remote detection instruments have certain detection blind spots. By introducing a new data acquisition mode, the reflection signals corresponding to the reflectors in the detection blind spots can also be accurately detected. record, which improves the ability of far detection to identify the reflection interface near the borehole wall; thirdly, in the current acoustic logging technology, sometimes it is necessary to complete conventional logging tasks (such as the measurement of formation velocity), and it is also necessary to reflect The body is imaged. In this case, in order to record the information of the direct wave in the well and the reflected wave outside the well at the same time, it is necessary to adopt an ultra-long logging record length, which in turn causes a large data transmission pressure, and accordingly affects the efficiency of conventional logging operations. speed. The invention separates the acquisition of conventional well logging data from the acquisition of remote detection well logging data by introducing a single-pole-dipole mixed working mode, which are not affected by each other and are carried out in parallel. In this way, data acquisition and transmission can be performed according to the needs of logging operations: if only conventional logging operations are required, digitize the part of the conventional logging record length in the received data (monopole or dipole received data) And it can be transmitted to the surface acquisition system in real time, which ensures the speed of conventional logging operations. However, if it is necessary to collect conventional logging data and remote detection logging data at the same time, the remote detection logging data is collected with a longer acquisition window, and is selected for real-time transmission or centralized transmission after being stored in the instrument according to the transmission speed of the cable; Acquisition and transmission are performed using conventional logging data acquisition lengths.

The following describes the waveforms of conventional logging and remote detection when the sound source is a monopole source and a dipole source, respectively.

First case:

In the case of a unipolar source, three-dimensional finite difference simulations are used to calculate the logging waveforms obtained by different data acquisition methods. The model is shown in Figure 5, which is a schematic diagram of the remote detection calculation model provided by the embodiment of the present invention. , the size of the model is x=6.5m, y=3m, z=10.5m, the radius of the fluid-filled wellbore is 0.1m, the borehole center is located at x=y=1.5m, and the sound source is located at z=0.5m. The variable grid finite difference is adopted, the grid near the wellbore is 0.01m, the grid farther outside the well is 0.015m, and the time step is 1.0μs. The geological interface is distributed on the right side of the logging tool; the center frequency of the monopole transmitter of the logging tool is 8 kHz, and the receiver array is on the side of the sound source, and each receiver includes four receiving units shown in Fig. 2 ( P1, P2, P3, P4). The compressional wave velocity of formation 1 is 3000m/s, the shear wave velocity is 1800m/s, and the density is 2000kg/m3; the compressional wave velocity and shear wave velocity of formation 2 are 4500m/s and 2650m/s respectively, and the density is 2400kg/m3; The speed of sound is 1500m/s and the density is 1000kg/m3.

The monopole source is arranged in the well to excite the wave field, and the four receiving units corresponding to each receiver collect logging data respectively. Combine the data received by the four receiving units (P1, P2, P3, P4) to obtain three sets of data: unipolar receiving data, X-direction dipole receiving data, and Y-direction dipole receiving data.

The monopole receiving data is the data obtained in the conventional data acquisition mode, that is, the conventional logging data; the dipole receiving data in the X direction and the Y direction is the data obtained by using the monopole and dipole mixed working mode, that is, the remote detection logging data .

Fig. 6 is a conventional well logging waveform when the monopole source provided by the embodiment of the present invention is used. Fig. 6 also shows the arrival-time curves of direct waves in different types of wells obtained through theoretical calculation, which correspond well to the simulation results. It can be seen from Fig. 6 that conventional dipole waves (i.e., conventional logging data) contain direct waves in wells such as longitudinal waves, shear waves, and Stoneley waves; compared with direct waves in wells, the amplitude of reflected waves from outside the well It is very small, which is mainly due to the large impedance difference between the well and the formation in the fast formation, and the sound energy radiated from the well to the outside is limited. In reality, if attenuation is considered, the amplitude of the reflected wave will be smaller. Moreover, the reflected wave from outside the well overlaps with the Stoneley wave in the well, which makes it difficult to record and extract subsequent reflected waves. From this point of view, the waveform collected in the conventional logging mode is mainly the direct arrival wave in the well, which can be used in traditional acoustic logging operations, such as the measurement of formation velocity and the extraction of formation parameters (porosity, permeability).

Fig. 7 is the long-distance detection logging waveform when the monopole source is provided by the embodiment of the present invention. In Fig. 7, the received waveform is the difference between the first receiving unit P1 and the third receiving unit P3. The process of calculating the difference attenuates the signals of the same polarity on the first receiving unit and the third receiving unit (in this case, mainly the direct wave signal in the well excited by the monopole source), so it was originally annihilated by the Stoneley The reflected wave under the wave is revealed. The arrival curve corresponding to the theoretical calculation can clearly identify the reflected longitudinal wave and reflected shear wave outside the well. After the reflected signal is adjusted by gain, it is sent to the analog-to-digital converter for quantification, and finally the quantized digital data is transmitted to the ground acquisition system. The accurate position of the geological reflection interface can be further obtained by analyzing and processing the data including formation reflection wave signals collected by the hybrid working mode.

In order to further explain the working principle of the present invention, the waveform received by the receiver at a distance of 4.5 meters from the sound source is extracted, as shown in Figure 8. The waveforms obtained by subtracting the respective waveforms of receiving units P1 and P3 at m. In Figure 8, the dotted line represents the waveform received by a single receiving unit (P1 or P3), and the solid line represents the subtraction of two receiving units (P1- P3) The obtained waveform. It can be seen from Fig. 8 that the two dashed lines representing the waveform of the first receiving unit P1 and the waveform of the third receiving unit P3 are almost completely coincident, which is because: the wave field excited by the monopole source is located at the same depth, and The response of the direct wave in the well received by the two axisymmetric receiving units P1 and P3 is exactly the same, and the direct wave received by the two receiving units is dominant in the waveform (much larger than the amplitude of the reflected wave), so the first receiving unit P1 It almost coincides with the third receiving unit P3 waveform. And through subtraction, the signals with the same polarity in the first receiving unit P1 and the third receiving unit P3 are weakened (here mainly the direct wave in the well excited by the monopole source), leaving only the solid line in Fig. 8 well-reflected waves. From this point of view, through the mixed working mode of monopole source excitation and dipole reception, the amplitude of the reflected wave outside the well is enhanced relative to the direct wave in the well, which is beneficial to the extraction and separation of reflected wave signals.

In addition, comparing the arrival time of the Stoneley wave in Figure 6 with the arrival time of the reflected longitudinal wave in Figure 7, it can be seen that for a reflector (3 meters in this embodiment) that is closer to the well axis, the reflected wave and the direct wave in the well are within The aliasing is serious within the range of logging source distance, and it is difficult to effectively separate them. Through the mixed working mode of monopole source excitation and dipole reception, the reflection signal corresponding to the reflector can also be accurately recorded.

Second case:

In the case of a dipole source, the calculation model is shown in Fig. 5. The variable grid finite difference is used, the grid near the wellbore is 0.01m, the grid farther outside the well is 0.015m, and the time step is 1.2μs. The dipole source points to the X-axis with a center frequency of 3kHz. The compressional wave velocity of formation 1 is 2000m/s, the shear wave velocity is 600m/s, and the density is 2000kg/m3; the compressional wave velocity and shear wave velocity of formation 2 are 3800m/s and 2000m/s respectively, and the density is 2150kg/m3; The speed of sound is 1500m/s and the density is 1000kg/m3. Other parameters are the same as those in the case of monopole source.

A dipole source is arranged in the well to excite the wave field, and four receiving units corresponding to each receiver collect logging data respectively. Combine the data received by the four receiving units (P1, P2, P3, P4) to obtain three sets of data: unipolar receiving data, X-direction dipole receiving data, and Y-direction dipole receiving data.

When the sound source is a dipole source, it can be seen from S103 that: the dipole type receiving data in the X direction and the Y direction is the data obtained in the conventional data acquisition mode, that is, the conventional logging data; The data obtained by the mixed working mode is the remote detection logging data.

Fig. 9 is a conventional well logging waveform when the dipole source provided by the embodiment of the present invention is used. It can be seen from Fig. 9 that the conventional dipole wave train contains direct waves such as longitudinal waves and bending waves, and the intensity of the bending waves is greater than that of the reflected longitudinal waves outside the well. The dipole waveforms collected in the conventional logging mode can be used for conventional Dipole logging operations, such as the measurement of parameters such as formation shear wave velocity and formation anisotropy. In this embodiment, the reflected longitudinal wave outside the well can be identified from the conventional logging waveform. This is because the impedance between the well and the formation in the slow formation is small, so the intensity of the reflected wave is greater than that in the fast formation in the first case. It is also a reason why the far detection technology is better applied in the slow formation than in the fast formation.

Fig. 10 is a long-range detection logging waveform when the dipole source provided by the embodiment of the present invention is used. In Figure 10, the waveforms of the four receiving units are superimposed to weaken the signals with opposite polarities in each receiving unit (in this embodiment, mainly the direct wave in the well excited by the dipole source), and the direct wave in the well is effectively suppressed , the amplitude of the reflected wave outside the well has been greatly improved compared with that of the mode wave in the well.

Fig. 11 is a schematic diagram of a logging device provided by an embodiment of the present invention. As shown in Fig. 11, this embodiment includes: an arrangement unit 1101, an acquisition unit 1102, a combination unit 1103, and a generation unit 1104;

The arrangement unit 1101 is used to arrange the sound source and at least one receiver in the well to be detected, wherein the receiver includes four receiving units arranged at equal intervals in the circumferential direction, and the first receiving unit among the four receiving units The unit and the third receiving unit are located on the X axis, and the second receiving unit and the fourth receiving unit among the four receiving units are located on the Y axis;

The collection unit 1102 is configured to collect the first logging data by the first receiving unit, collect the second logging data by the second receiving unit, and collect the third logging data by the third receiving unit when the sound source excites the wave field. well data, the fourth receiving unit collects fourth well logging data;

The combination unit 1103 is used to combine the first well logging data, the second well logging data, the third well logging data and the fourth well logging data to obtain monopole receiving data and X direction dipole receiving data. Data and Y direction dipole receiving data;

The generation unit 1104 is used to obtain conventional logging data and remote detection logging data according to the form of the sound source and the monopole type receiving data, the X direction dipole type receiving data, and the Y direction dipole type receiving data data.

Optionally, the sound source specifically includes: a monopole source or a dipole source.

Optionally, the combination unit 1103 is specifically used to:

Adding the first well logging data, the second well logging data, the third well logging data and the fourth well logging data to obtain unipolar receiving data;

Subtracting the first logging data and the third logging data to obtain dipole receiving data in the X direction;

and subtracting the second well logging data from the fourth well logging data to obtain dipole receiving data in the Y direction.

Optionally, the generation unit 1104 is specifically configured to, when the sound source is a monopole source, the monopole received data is conventional logging data, and the dipole received data in the X direction and the The data received by the dipole type in the Y direction is the remote detection logging data.

Optionally, the generation unit 1104 is specifically configured to, when the sound source is a dipole source, the monopole received data is far-detection well logging data, and the X-direction dipole received data and the The data received by the dipole type in the Y direction is conventional logging data.

Professionals should further realize that the units and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the relationship between hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (2)

1. A single dipole hybrid method for remote detection logging, characterized in that, the method comprises: The sound source and at least one receiver are arranged in the well to be detected, wherein the receiver includes four receiving units arranged at equal intervals in the circumferential direction, and the first receiving unit and the third receiving unit in the four receiving units are located at X axis, the second receiving unit and the fourth receiving unit in the four receiving units are located on the Y axis; When the sound source excites the wave field, the first receiving unit collects first logging data, the second receiving unit collects second logging data, the third receiving unit collects third logging data, and the fourth receiving unit collects The fourth logging data; Combining the first well logging data, the second well logging data, the third well logging data and the fourth well logging data to obtain monopole receiving data, X direction dipole receiving data and Y direction dipole receiving data data; Obtain conventional logging data and remote detection logging data according to the form of the sound source and the monopole receiving data, X direction dipole receiving data, and Y direction dipole receiving data; Wherein, adding the first well logging data, the second well logging data, the third well logging data and the fourth well logging data to obtain the unipolar receiving data; Subtracting the first logging data and the third logging data to obtain dipole receiving data in the X direction; Subtracting the second well logging data and the fourth well logging data to obtain dipole receiving data in the Y direction; The sound source specifically includes: a monopole source and a dipole source; Wherein, when the sound source is a monopole source, the monopole type received data is conventional well logging data, and the X direction dipole type received data and the Y direction dipole type received data are telescopic well logging data. Well data; when the sound source is a dipole source, the monopole type received data is far detection logging data, the X direction dipole type received data and the Y direction dipole type received data are conventional Logging data; performing data transmission and processing on the conventional logging data and the remote detection logging data; Among them, real-time transmission and on-site processing of the conventional logging data, and application of conventional logging processing software for evaluation; processing of the remote detection logging data, if the data transmission speed meets the requirements, then real-time transmission, if the If the above-mentioned transmission speed does not meet the requirements, it will be stored in the instrument, read after all measurements are completed, and be evaluated by remote detection logging processing software; The remote detection logging data is used to attenuate the direct wave signal in the well, determine the reflection signal, and after the gain adjustment of the reflection signal, send it to the analog-to-digital converter for quantification, and obtain the quantization data of the reflection wave; wherein, the reflection signal Signals include: reflected longitudinal waves and reflected shear waves outside the well. 2. A single dipole mixing device for remote detection well logging, characterized in that the device comprises: an arrangement unit, an acquisition unit, a combination unit, and a generation unit; The arrangement unit is used to arrange the sound source and at least one receiver in the well to be detected, wherein the receiver includes four receiving units arranged at equal intervals in the circumferential direction, and the first receiving unit in the four receiving units and the third receiving unit is located on the X axis, and the second receiving unit and the fourth receiving unit among the four receiving units are located on the Y axis; The acquisition unit is configured to collect first logging data by the first receiving unit, collect second logging data by the second receiving unit, and collect third logging data by the third receiving unit when the sound source excites the wave field. data, the fourth receiving unit collects fourth logging data; The combining unit is used to combine the first well logging data, the second well logging data, the third well logging data and the fourth well logging data to obtain monopole receiving data and X direction dipole receiving data and Y direction dipole type to receive data; The combining unit is specifically configured to add the first logging data, the second logging data, the third logging data and the fourth logging data to obtain unipolar receiving data; Subtracting the first logging data and the third logging data to obtain dipole receiving data in the X direction; Subtracting the second well logging data and the fourth well logging data to obtain dipole receiving data in the Y direction; The generation unit is used to obtain conventional logging data and remote detection logging data according to the form of the sound source and the monopole type receiving data, the X direction dipole type receiving data, and the Y direction dipole type receiving data ; The sound source specifically includes: a monopole source and a dipole source; wherein, the generating unit is specifically used for, when the sound source is a monopole source, the monopole received data is conventional measurement Well data, the dipole type reception data in the X direction and the dipole type reception data in the Y direction are far detection logging data; when the sound source is a dipole source, the monopole type reception data is far The detection logging data, the X-direction dipole-type receiving data and the Y-direction dipole-type receiving data are conventional logging data; perform data transmission and processing on the conventional logging data and the remote detection logging data ; The generation unit is specifically used for real-time transmission and on-site processing of the conventional well logging data, and evaluation using conventional well logging processing software; for processing the remote detection well logging data, if the data transmission speed meets the requirements, then Carry out real-time transmission, if the transmission speed does not meet the requirements, then store it in the instrument, read it again after all the measurements are completed, and use the remote detection logging processing software to evaluate; the remote detection logging data is used for Attenuate the direct wave signal in the well, determine the reflected signal, adjust the gain of the reflected signal, send it to the analog-to-digital converter for quantization, and obtain the quantified data of the reflected wave; wherein, the reflected signal includes: the reflected longitudinal wave and the reflected shear wave outside the well .