CN213122323U - Transient electromagnetic method multi-component post-casing reservoir resistivity detector - Google Patents
Transient electromagnetic method multi-component post-casing reservoir resistivity detector Download PDFInfo
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- CN213122323U CN213122323U CN202021962952.9U CN202021962952U CN213122323U CN 213122323 U CN213122323 U CN 213122323U CN 202021962952 U CN202021962952 U CN 202021962952U CN 213122323 U CN213122323 U CN 213122323U
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Abstract
本实用新型提供一种瞬变电磁法多分量套后储层电阻率探测仪，包括井下处理电路、多个横向探头、纵向探头和多个发射接收电路，该井下处理电路接收地面系统传输过来的电信号，并将电信号转换为发射信号传输给所述多个发射接收电路，所述多个发射接收电路将发射信号进行处理后传输给其对应的探头的发射线圈，并接收探头的接收线圈传输过来的接收信号，所述多个发射接收电路将接收信号进行信号处理后，将处理后的接收信号传输给该井下处理电路，该井下处理电路接收处理后的接收信号，并将接收信号进行信号调理后，传输到地面系统。该瞬变电磁法多分量套后储层电阻率探测仪实现了井下信息高分辨探测和套后储层远距离探测，提高了探测数据的准确性。
The utility model provides a transient electromagnetic method multi-component post-casing reservoir resistivity detector, which comprises a downhole processing circuit, a plurality of transverse probes, a longitudinal probe and a plurality of transmitting and receiving circuits. The downhole processing circuit receives the data transmitted from the ground system. The electrical signal is converted into a transmitting signal and transmitted to the plurality of transmitting and receiving circuits. The plurality of transmitting and receiving circuits process the transmitting signal and transmit it to the transmitting coil of the corresponding probe, and receive the receiving coil of the probe. For the transmitted received signals, the plurality of transmitting and receiving circuits perform signal processing on the received signals, and then transmit the processed received signals to the downhole processing circuit, and the downhole processing circuit receives the processed received signals and processes the received signals. After the signal is conditioned, it is transmitted to the ground system. The transient electromagnetic method multi-component post-casing reservoir resistivity detector realizes high-resolution detection of downhole information and long-distance detection of post-casing reservoir, and improves the accuracy of detection data.
Description
Technical Field
The utility model relates to an oil gas resource development technical field especially involves a transient electromagnetism method multicomponent and overlaps back reservoir resistivity detection instrument.
Background
As the development of oil fields in China enters the middle and later stages successively, the water content of oil wells continuously rises, and the improvement of the recovery ratio and the stable and high yield are difficult. On one hand, under the condition that the exploration difficulty of a new oil well is increased and the exploitation cost is increased at present, how to discover that unexplored oil exists on other layers outside a casing can be realized; on the other hand, when the water content of the oil field increases year by year, the recovery ratio of the crude oil is improved by extracting the residual oil from the oil well with high underground water content to the maximum extent. Through the detection technology behind the cover, know the distribution situation of remaining oil, can provide the basis for the exploitation of remaining oil. The method for detecting the cased reservoir mainly comprises carbon-oxygen ratio logging, boron neutron life logging, resistivity logging and the like. The radial detection depth of carbon-oxygen ratio logging and boron neutron life logging is only about 0.25m, and the method has certain requirements on the mineralization degree of well fluid and formation water and has low adaptability. The resistivity method is considered to be one of the most effective methods in reservoir detection after production well casing, but the problems of low resolution and insufficient detection distance exist at present.
In chinese patent application No. CN200910021654.1, a transient electromagnetic logging device in a cased well is disclosed. The ground monitoring equipment 1 is connected with the underground logging instrument 3 through a cable 2, the underground logging instrument 3 is composed of a transmitting control unit 4, a receiving control unit 5, a magnetizing power supply 6, a magnetizing device 7, a transmitting coil 12 and a receiving coil 13, a transient electromagnetic technology is utilized to transmit low-frequency high-power electromagnetic signals, a changing magnetic field generates a changing electric field according to a Faraday's law of electromagnetic induction, the characteristics of the electric field are determined by the characteristics of a medium, and the magnetic field reflecting the characteristics of the measured medium is received by the underground logging instrument 3, so that the aim of identifying the stratum characteristics through signals detected by the receiving coil is fulfilled. The patent is only provided with one transmitting coil and one receiving coil, the power of the transmitted signal is small, and the detection resolution is low.
In chinese patent application No. CN201310511106.3, a transient electromagnetic logging instrument is disclosed, comprising a housing, a circuit module disposed in the housing, and an electromagnetic probe system connected to the circuit module. The circuit module is composed of a direct current power supply, a main control circuit and a power supply module, wherein the direct current power supply is sequentially connected with a power supply voltage stabilizing module, a PWM (pulse width modulation) module, a high-power isolation transformer bank and a power supply conversion module to form a direct current power supply circuit, and the main control circuit takes a digital signal processor as a core and is provided with a communication bus, a power bus, a control bus and a data bus at the periphery. The electromagnetic probe system consists of a transmitting coil with a magnetic core and a plurality of receiving coils. The patent does not have a sleeve magnetizing device, and as the sleeve is made of ferromagnetic materials, most of transmitted and received electromagnetic signals are absorbed by the sleeve, so that the detection distance is influenced.
Therefore, a novel transient electromagnetic method multi-component set-back reservoir resistivity detector is invented, and the technical problems are solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a realized that information high-resolution is surveyed in the pit, improved electromagnetic signal's penetrability, improved the transient electromagnetism method multicomponent of the accuracy of surveying data and overlapped back reservoir resistivity detection instrument.
The purpose of the utility model can be realized by the following technical measures: the transient electromagnetic method multi-component cased reservoir resistivity detector comprises an underground processing circuit, a plurality of transverse probes, a longitudinal probe and a plurality of transmitting and receiving circuits which are connected with the transverse probes and the longitudinal probe in a one-to-one corresponding mode, wherein the underground processing circuit is connected with the transmitting and receiving circuits and is connected with a ground system.
The purpose of the utility model can be realized by the following technical measures:
the underground processing circuit comprises a power supply module, a transmission module, a first main control circuit and a first transmission circuit, wherein the power supply module receives voltage signals transmitted by a ground system, converts the voltage signals into voltage signals required by the underground processing circuit, the first main control circuit is connected to the power supply module and the first transmission circuit respectively, the transmission module receives electric signals transmitted by the ground system, transmits the electric signals to the first main control circuit, the first main control circuit converts the electric signals into transmission signals and transmits the transmission signals to the first transmission circuit, and the first transmission circuit transmits the transmission signals to the plurality of transmitting and receiving circuits.
The underground processing circuit further comprises a signal acquisition circuit, a filter circuit, an operational amplifier circuit, an inverse amplifier circuit and a first filter circuit which are sequentially connected, the first transmission circuit is connected to the signal acquisition circuit and transmits a received signal to the signal acquisition circuit, so that the received signal sequentially passes through the signal acquisition circuit, the filter circuit, the operational amplifier circuit, the inverse amplifier circuit and the first filter circuit to be subjected to signal conditioning, the first filter circuit transmits the received signal subjected to signal conditioning to the first main control circuit, and the first main control circuit transmits the conditioned received signal to a ground system through the transmission module.
This transmission and reception circuit includes second transmission circuit, second master control circuit and the bootstrap circuit who connects gradually, drive circuit and H bridge, this second transmission circuit connects in this second master control circuit, transmit signal for this second master control circuit, this H bridge connects in the transmitting coil of probe, this second master control circuit connects in this bootstrap circuit, transmit signal for this bootstrap circuit, make transmitting signal pass through this bootstrap circuit, the signal processing back of this drive circuit and this H bridge, transmit the transmitting coil of probe by this H bridge.
The transmitting and receiving circuit further comprises a differential amplifying circuit, a second filter circuit and a matching circuit which are sequentially connected, the matching circuit is connected to the second transmission circuit, the differential amplifying circuit is connected to the receiving coil of the probe, the receiving coil of the probe receives the received signals transmitted by the receiving coil, the received signals pass through the differential amplifying circuit, the second filter circuit and the matching circuit to perform signal processing, and the processed received signals are transmitted to the underground processing circuit through the second transmission circuit.
The transient electromagnetic method multi-component cased reservoir resistivity detector also comprises a temperature sensor, wherein the temperature sensor is connected to the underground processing circuit, acquires a temperature signal, transmits the temperature signal to the underground processing circuit and transmits the temperature signal to a ground system through the underground processing circuit.
The detector also comprises a sleeve magnetization probe which is connected to the underground processing circuit and used for magnetizing the sleeve.
The transient electromagnetic method multi-component cased reservoir resistivity detector also comprises a shell, wherein the temperature sensor, the underground processing circuit, the casing magnetization probe, the plurality of transverse probes, the longitudinal probe and the plurality of transmitting and receiving circuits are all arranged in an inner cavity of the shell.
The transient electromagnetic method multi-component jacketed reservoir resistivity detector further comprises a centralizer made of tetrapropylene fluoride rubber, and the transient electromagnetic method multi-component jacketed reservoir resistivity detector is centered in an oil pipe.
The plurality of transverse probes and the longitudinal probe are formed by winding high-temperature enameled wires on a magnetic material.
The utility model provides a transient electromagnetism method multicomponent cover back reservoir resistivity detection instrument for cover back reservoir resistivity is surveyed. The detector utilizes a transient electromagnetic principle, adopts multi-component arrangement and utilizes a casing magnetization technology to realize remote detection (the radial detection distance is 2 meters) of the resistivity of the cased reservoir, and provides technical support for reservoir physical property analysis and residual oil evaluation. The device of the utility model include: centralizer, temperature sensor, processing circuit in the pit, sleeve pipe magnetization probe, horizontal probe, vertical probe, transmission receiving circuit, shell. The multi-component probes of 2 transverse probes and 1 longitudinal probe are structurally arranged, the data of the probes eliminate the influence of receiving and transmitting distance components through array weighting, the signal-to-noise ratio of the transient electromagnetic underground detection system can be improved, and the detection resolution of the detector is improved. Because the sleeve is made of ferromagnetic material, most of the transmitted and received electromagnetic signals are absorbed by the sleeve, in order to weaken the shielding effect of the sleeve on the electromagnetic signals, the sleeve magnetization probe is adopted to carry out segmented magnetization processing on the metal sleeve, so that the magnetic conductivity of the sleeve in the well section where the instrument is located can be effectively reduced, the penetrating capability of the electromagnetic signals on the sleeve is obviously improved, and the remote detection distance is increased. The ambient temperature in which the detector operates has an important influence on the measurement result, and on the one hand, the sensor and the measurement circuit in the instrument are also influenced. The device in the circuit can generate the phenomena of output noise power increase and output voltage drift, but the temperature drift of the electronic device can be effectively inhibited by adopting a high-temperature device and a differential symmetrical compensation measure. On the other hand, the magnetic permeability is under the Curie temperature and is in an increasing relationship with the temperature, and the temperature coefficient of the resistivity of the probe core rod material is changed along with the temperature change. Because the temperature sensor is arranged to measure the auxiliary parameters, a basis is provided for temperature calibration of the probe, the influence of temperature on the detection performance of the probe is reduced, and the accuracy of data is improved. The utility model provides a transition electromagnetism method multicomponent cover back reservoir resistivity detection instrument has following technological effect:
1. the underground information high-resolution detection is realized by adopting the structural arrangement of the multi-component probe and the precise circuit printing;
2. the segmented transient casing magnetizing device weakens the shielding effect of the casing on electromagnetic signals, improves the penetrability of the electromagnetic signals and realizes the remote detection of the sleeved reservoir;
3. the auxiliary measurement parameter temperature is added to provide a basis for the temperature calibration of the probe, and the accuracy of the detection data is improved.
Drawings
Fig. 1 is a structural diagram of a specific embodiment of the transient electromagnetic method multicomponent jacketed reservoir resistivity survey meter of the present invention;
fig. 2 is a system structure block diagram of a specific embodiment of the transient electromagnetic method multicomponent jacketed reservoir resistivity detector of the present invention;
fig. 3 is a circuit block diagram of a specific embodiment of the transient electromagnetic method multicomponent jacketed reservoir resistivity detector of the present invention.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
As shown in fig. 1, fig. 1 is a structural diagram of the transient electromagnetic method multicomponent jacketed reservoir resistivity detector of the present invention. The device of the utility model include: the device comprises a centralizer 1, a temperature sensor 2, a downhole processing circuit 3, a casing magnetization probe 4, a transverse probe 5, a longitudinal probe 6, a transmitting and receiving circuit 7 and a shell 8.
As shown in the system structure block diagram of fig. 2, the surface system 10 is connected to the instrument through a single-core cable and is connected to the downhole processing circuit 3, the downhole processing circuit 3 is connected to each transmitting and receiving circuit 7 through a conducting wire, and data can be transmitted between the downhole processing circuit 3 and each transmitting and receiving circuit 7 and between the surface system 10 in two directions. The temperature sensor 2 and the sleeve magnetization probe 4 are respectively connected with the underground processing circuit 3 through leads. The coil of each transverse and longitudinal probe is connected with the corresponding transmitting and receiving circuit through a lead respectively.
Hardware circuit block diagram as shown in fig. 3, a power supply module 31 in the downhole processing circuit 3 converts the voltage transmitted by the cable into the voltage required by the downhole circuit, and a first main control circuit 32 controls a first transmission circuit 33 to perform bidirectional data transmission with a second transmission circuit 71 in the transmitting and receiving circuit 7. The transmitting signal enters the transmitting and receiving circuit 7 from the second transmission circuit 71, and the bootstrap circuit 72 can raise the voltage to prepare for transmitting, and then the transmitting signal is transmitted to the transmitting coil through the driving circuit 73 and the H-bridge circuit 74, and the signal is sent out. After the signal is sent out, the receiving coil receives the response signal, conditions the signal through the differential amplifying circuit 75, the filter circuit 76 and the matching circuit 77, and transmits the signal to the downhole processing circuit 3 through the second transmission circuit 71. The signals received by each probe are collected and integrated through a signal collecting circuit, are subjected to signal conditioning (38) through filtering (35), operational amplification (36), inverse amplification (37) and filtering again, and are finally transmitted back to a main control circuit (32), and are transmitted back to the ground through a transmission module after being integrated with the temperature signals through a single-core cable.
The centralizer 1 material is the tetrafluoroethylene-propylene rubber, and the effect makes the instrument center in oil pipe, avoids the signal of transmission receiving because the instrument is not centered the production error.
The temperature sensor 2 is used for measuring auxiliary measurement parameters, and temperature data are transmitted back to the downhole processing circuit 3 and are transmitted back to the surface system 10 together with other data through a cable, so that a basis is provided for temperature calibration of the probe.
The downhole processing circuit 3 mainly comprises an upper connector, a transmission module 39, a power supply module 31, a filter circuit 38, an inverting amplifier 37, a main control circuit 32, a signal acquisition circuit 34, an operational amplification circuit 36, a lower connector and the like, and is used for completing the up-and-down transmission of signals (the upper connector is connected with a cable to be transmitted to the ground, and the lower connector is connected with other circuit boards). The signals transmitted back by the transmitting and receiving circuits 7 can be conditioned by the underground processing circuit through filtering, amplification, inverse amplification and re-filtering.
The sleeve magnetizing probe 4 is used for magnetizing a sleeve, a direct current is injected onto a magnetizing coil to generate a strong magnetizing field by adopting an electromagnetic yoke longitudinal magnetization method, a main magnetic path is constructed by soft magnetic materials, the local magnetization processing of the sleeve is realized, and the penetration capacity of signals can be effectively improved after the sleeve is magnetized.
The transverse probe 5 and the longitudinal probe 6 are made of magnetic materials and high-temperature enameled wires wound on the magnetic materials and used for transmitting and receiving electric signals. The transmitting coil transmits direct current pulse current to generate a closed magnetic force field in the surrounding sleeve; when the excitation current is switched off, transient current is generated in the sleeve, and the transient current can generate a secondary field signal; the secondary field is received by the receiving coil to generate a voltage signal which can be processed. The voltage signal can reflect the radial resistivity change of the reservoir and the interlayer after the sleeve, and the oil-water content of the reservoir is analyzed. The total number of the probes is 2, and the total number of the probes is 1, and each probe is connected with a transmitting and receiving circuit 7, which comprises a bootstrap circuit 72, a driving circuit 73, a matching circuit 73, an H bridge 74, a filter circuit 75 and a differential amplifying circuit 76. The transmitting and receiving circuit 7 controls the probe to transmit signals, the probe can receive response signals and transmit the response signals back to the transmitting and receiving circuit to perform signal conditioning through the differential amplification circuit, the filtering circuit and the matching circuit.
The temperature sensor 2, the downhole processing circuit 3, the sleeve magnetization probe 4, the transverse probe 5, the longitudinal probe 6 and the transmitting and receiving circuit 7 are all arranged in the inner cavity of the shell 8.
During testing, the instrument connecting cable is put into the well through the winch, and the other end of the cable is connected with the ground control cabinet. The ground control cabinet sends out electric signals through a cable, the electric signals are transmitted to the underground processing circuit, and the underground processing circuit transmits the signals to the transmitting and receiving circuit, so that the probes are controlled to transmit the signals. Meanwhile, the probe receives a voltage signal containing the radial resistivity change information of the jacketed reservoir and the interlayer, and the received signal is conditioned through the transmitting and receiving circuit and transmitted back to the ground control cabinet through the cable for further processing. The auxiliary parameter temperature data transmitted back by the temperature sensor is also transmitted back to the ground chassis through a cable.
Claims (10)
1. The transient electromagnetic method multi-component cased reservoir resistivity detector is characterized by comprising an underground processing circuit, a plurality of transverse probes, a longitudinal probe and a plurality of transmitting and receiving circuits which are connected with the transverse probes and the longitudinal probe in a one-to-one corresponding mode, wherein the underground processing circuit is connected with the transmitting and receiving circuits and is connected with a ground system.
2. The transient electromagnetic multi-component cased reservoir resistivity survey instrument of claim 1, wherein the downhole processing circuit comprises a power module, a transmission module, a first master control circuit and a first transmission circuit, the power module receives a voltage signal transmitted from a surface system and converts the voltage signal into a voltage signal required by the downhole processing circuit, the first master control circuit is respectively connected to the power module and the first transmission circuit, the transmission module receives an electrical signal transmitted from the surface system and transmits the electrical signal to the first master control circuit, the first master control circuit converts the electrical signal into a transmission signal and transmits the transmission signal to the first transmission circuit, and the transmission signal is transmitted to the plurality of transmitting and receiving circuits through the first transmission circuit.
3. The transient electromagnetic method multicomponent cased reservoir resistivity survey instrument according to claim 2, wherein the downhole processing circuit further comprises a signal acquisition circuit, a filter circuit, an operational amplifier circuit, an inverting amplifier circuit and a first filter circuit connected in sequence, the first transmission circuit is connected to the signal acquisition circuit and transmits a received signal to the signal acquisition circuit, so that the received signal is subjected to signal conditioning by passing through the signal acquisition circuit, the filter circuit, the operational amplifier circuit, the inverting amplifier circuit and the first filter circuit in sequence, the first filter circuit transmits the conditioned received signal to the first master control circuit, and the first master control circuit transmits the conditioned received signal to a ground system through the transmission module.
4. The transient electromagnetic method multicomponent cased reservoir resistivity detector according to claim 1, wherein the transmitting and receiving circuit includes a second transmission circuit, a second main control circuit, a bootstrap circuit, a driving circuit and an H-bridge, which are connected in sequence, the second transmission circuit is connected to the second main control circuit, and transmits the transmitting signal to the second main control circuit, the H-bridge is connected to the transmitting coil of the probe, the second main control circuit is connected to the bootstrap circuit, and transmits the transmitting signal to the bootstrap circuit, so that the transmitting signal is transmitted to the transmitting coil of the probe by the H-bridge after being processed by the bootstrap circuit, the driving circuit and the H-bridge.
5. The transient electromagnetic multi-component cased reservoir resistivity survey instrument of claim 4, wherein the transmitting and receiving circuit further comprises a differential amplifying circuit, a second filter circuit and a matching circuit connected in sequence, the matching circuit is connected to the second transmission circuit, the differential amplifying circuit is connected to the receiving coil of the probe, the receiving coil of the probe receives the received signal transmitted from the receiving coil, the received signal is processed by the differential amplifying circuit, the second filter circuit and the matching circuit, and the processed received signal is transmitted to the downhole processing circuit through the second transmission circuit.
6. The transient electromagnetic multicomponent cased reservoir resistivity survey instrument of claim 1, further comprising a temperature sensor connected to the downhole processing circuit, wherein the temperature sensor collects temperature signals and transmits the temperature signals to the downhole processing circuit and to a surface system via the downhole processing circuit.
7. The transient electromagnetic multicomponent cased reservoir resistivity survey instrument of claim 6, further comprising a casing magnetization probe connected to the downhole processing circuit for magnetizing the casing.
8. The transient electromagnetic multicomponent cased reservoir resistivity survey instrument of claim 7, further comprising a housing, the temperature sensor, the downhole processing circuitry, the casing magnetization probe, the plurality of transverse probes, the longitudinal probe, and the plurality of transmit-receive circuits being disposed within an interior cavity of the housing.
9. The transient electromagnetic multicomponent cased reservoir resistivity survey instrument of claim 1, further comprising a centralizer made of tetrapropylene fluoride rubber for centering the transient electromagnetic multicomponent cased reservoir resistivity survey instrument in the tubing.
10. The transient electromagnetic multicomponent cased reservoir resistivity survey instrument of claim 1, wherein the plurality of transverse probes and the longitudinal probe are comprised of high temperature enameled wire wound on a magnetic material.
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| CN202021962952.9U CN213122323U (en) | 2020-09-09 | 2020-09-09 | Transient electromagnetic method multi-component post-casing reservoir resistivity detector |
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| CN202021962952.9U CN213122323U (en) | 2020-09-09 | 2020-09-09 | Transient electromagnetic method multi-component post-casing reservoir resistivity detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115962812A (en) * | 2021-10-13 | 2023-04-14 | 中国石油化工股份有限公司 | Oil-gas well temperature difference method flow measurement system and error correction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115962812A (en) * | 2021-10-13 | 2023-04-14 | 中国石油化工股份有限公司 | Oil-gas well temperature difference method flow measurement system and error correction method |
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