CN102966345B - A kind of simulation well system for testing electromagnetic wave resistivity logging instrument - Google Patents
A kind of simulation well system for testing electromagnetic wave resistivity logging instrument Download PDFInfo
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- CN102966345B CN102966345B CN201210518241.6A CN201210518241A CN102966345B CN 102966345 B CN102966345 B CN 102966345B CN 201210518241 A CN201210518241 A CN 201210518241A CN 102966345 B CN102966345 B CN 102966345B
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Abstract
The invention discloses a kind of simulation well system for testing electromagnetic wave resistivity logging instrument, overcome the deficiency that existing simulation well system is difficult to the test requirements document better meeting electromagnetic wave resistivity logging instrument, this system comprises model formation and longitudinally runs through the well layer of described model formation central authorities, and described well layer includes the simulation well that described electromagnetic wave resistivity logging instrument can pass through; Described model formation includes the homogeneous dielectric layer of genesis analysis, resistivity anisotropy layer and cushion coat, the stratomere that described homogeneous dielectric layer dummy level resistivity is identical with vertical resistivity, the stratomere that described resistivity anisotropy layer dummy level resistivity is different with vertical resistivity, described homogeneous dielectric layer and resistivity anisotropy layer and external environment condition are isolated by described cushion coat.The embodiment of the application is that electromagnetic wave resistivity logging instrument provides a noninductive test macro without magnetic, can carry out efficiently and safely operating and testing.
Description
Technical field
The present invention relates to the experimental technique of logging instrument, particularly relating to a kind of simulation well system for testing electromagnetic wave resistivity logging instrument.
Background technology
A kind of novel logger is before coming into operation, and big city, through the development of theoretical research, experimental study and model machine, finally just carries out large batch of production and comes into operation.
For a novel logger, experimental study is very crucial, both whether consistently with theoretical expectation can be used to evaluation appts response, thus the feasibility of the correctness of proof theory and scheme, also can provide guidance according to the parameter designing of result of the test to instrument simultaneously.So the research and development of logger all be unable to do without test, the research and development of reliable testing circumstance to instrument are most important.
Multi-components EPT is mainly used in well logging during field, compare traditional single shaft Electromagnetic Wave Propagation logging while drilling apparatus, this instrument can general measure formation resistivity parameter, can also azimuth be measured, and rely on the sensitivity at multi-components coil array formation interface to be that geosteering while drilling is offered help.Multiple-component induction logging instrument is mainly used in wireline logging field, its feature is can also detect stratum vertical resistivity while the stratum horizontal resistivity that detection is conventional, correct geologic assessment can not be made to overcome conventional induction log tool in the such resistivity anisotropy layer of the thin mutual reservoir of the husky mud stone of such as lamination, thus may occur underestimating the situation of even leaking and estimating to oil-gas Layer.
In order to can the response of evaluation appts under a model determined whether consistent with Theoretical Prediction value; first require that test well model is known deterministic models; a very large round pool is built in usual meeting in underground, fill the salting liquid of certain electrical conductivity in pond.The investigative range of induction logging instrument formation is usually larger, and the max survey depth as array induction logging tool (AIT) is 90 inches (in), and the responsive degree of depth of its formation is much larger than 90in.If model well is built in underground; the response contribution that actual formation outside well bucket understands induction instrument aratus is usually larger; and actual formation is generally heterogeneity medium; its electrical conductivity is unknown; and electrical conductivity can change with the humidity on stratum and change, so the outer stratum of well bucket does not wish to see on the impact research and development testing crew that induction instrument aratus responds.In order to obtain a known deterministic test model, just need the very large subsurface model well of scale of setting up, and model well needs in process of the test to change electrical conductivity, often need change water, thus required cost is high.The another kind of method reducing model well is that model well is built in earth's surface.Model well is built in the words on earth's surface, be the air of noninductive environment outside model well, so it can be seen as radial two-layer known models, built the test well of an induction logging instrument on earth's surface if any testing crew, its diameter is 14 feet (ft), is highly 20ft.But there are problems: what material to build guarantee testing circumstance with stable and noninductive without magnetic, build impact earth's surface being not equal to and not being subject to the earth and even model well basis completely in, how test environment is noninductive builds instrument lifting gear and transmitting device without when magnetic on test well when not affecting, how to improve model well test time efficiency and safety be also necessary, etc.
Electromagnetic wave resistivity logging instrument is a kind of logger carrying out Formation Resistivity Measurement parameter by receiving emitting electromagnetic wave, it comprises for all kinds of EPTs in well logging during, for all kinds of EPTs in wireline logging, for all kinds of induction log tools in wireline logging.
The test of electromagnetic wave resistivity logging instrument is also very strict to the requirement of environment, and during test, instrument is noninductive without magnetic in 10 meters except vertical direction, and testing circumstance electrical quantity is stablized, and security requirement is also higher.The pond of existing ground or underground is all difficult to the test requirements document meeting electromagnetic wave resistivity logging instrument preferably.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiency that existing simulation well system is difficult to the test requirements document better meeting electromagnetic wave resistivity logging instrument.
In order to solve the problems of the technologies described above, the invention provides a kind of simulation well system for testing electromagnetic wave resistivity logging instrument, comprise model formation and longitudinally running through the well layer of described model formation central authorities, wherein:
Described well layer includes the simulation well that described electromagnetic wave resistivity logging instrument can pass through;
Described model formation includes the homogeneous dielectric layer of genesis analysis, resistivity anisotropy layer and cushion coat, the stratomere that described homogeneous dielectric layer dummy level resistivity is identical with vertical resistivity, the stratomere that described resistivity anisotropy layer dummy level resistivity is different with vertical resistivity, described homogeneous dielectric layer and resistivity anisotropy layer and external environment condition are isolated by described cushion coat.
Preferably, the thin solid containing hole and liquid is arranged alternately in described resistivity anisotropy layer.
Preferably, the described liquid of thin solid described in tool conductive capability and tool conductive capability is arranged alternately in described resistivity anisotropy layer.
Preferably, be arranged alternately in described resistivity anisotropy layer and do not have the described liquid of thin solid described in conductive capability and tool conductive capability.
Preferably, the conducting medium of isotropic is filled with in described cushion coat.
Preferably, the below of described cushion coat position and described homogeneous dielectric layer and resistivity anisotropy layer.
Preferably, this system comprises:
Insulating base, carries described well layer and model formation.
Preferably, this system comprises:
Lifting transmission subsystem, lifts by crane described electromagnetic wave resistivity logging instrument when carrying out described test, for described electromagnetic wave resistivity logging instrument provides electric power and communications facility.
Preferably, this system comprises:
Dosing subsystem, for described model formation provides conducting medium.
Compared with prior art, the embodiment of the application is that electromagnetic wave resistivity logging instrument provides a noninductive test macro without magnetic, can carry out efficiently and safely operating and testing.The embodiment of the application is when testing electromagnetic wave resistivity logging instrument, instrument is noninductive without magnetic in 10 meters except vertical direction, and testing circumstance electrical quantity is stablized, and can verify the sensitivity of multi-components logging instrument formation resistivity anisotropy, and efficiently simple to operate, safety is high.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from manual, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in manual, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide the further understanding to technical solution of the present invention, and forms a part for manual, is used from and explains technical scheme of the present invention, do not form the restriction to technical solution of the present invention with the embodiment one of the application.
Fig. 1 is the organigram of the simulation well system for testing electromagnetic wave resistivity logging instrument of the embodiment of the present application.
Fig. 2 is the organigram of another simulation well system for testing electromagnetic wave resistivity logging instrument of the embodiment of the present application.
Fig. 3 is the organigram of the 3rd simulation well system for testing electromagnetic wave resistivity logging instrument of the embodiment of the present application.
Detailed description of the invention
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.Each feature in the embodiment of the present application and embodiment be combineding with each other, all within protection scope of the present invention under prerequisite of not conflicting mutually.
As shown in Figure 1, the embodiment of the present application include for the simulation well system testing electromagnetic wave resistivity logging instrument the main water pot 10 formed primarily of well layer 110 and model formation 120.
Main water pot 10 provides test environment for logging instrument.Main water pot 10 inner radial is divided into well layer 110 and model formation 120, the central authorities on the longitudinal penetration model stratum 120 of well layer 110.Well layer 110 includes the simulation well of simulated formation well, and the internal diameter of simulation well is greater than the external diameter of logging instrument, is convenient to passing through of logging instrument.In the embodiment of the application, well layer 110 is a sleeve pipe, and sleeve pipe can be insulating material pipe, also can be the composite material tube with certain conductive capability.
The external diameter of model formation 120 is the internal diameter of main water pot 10, and model formation 120 includes homogeneous dielectric layer 121, resistivity anisotropy layer 122 and cushion coat 123 in the vertical from top to bottom successively.
The stratomere that homogeneous dielectric layer 121 dummy level resistivity is identical with vertical resistivity, for the test of the isotropism detectivity of electromagnetic wave resistivity logging instrument provides testing circumstance.The test of the anisotropy detectivity of resistivity anisotropy layer 122 electromagnetic wave resistivity logging instrument.Homogeneous dielectric layer 121 and resistivity anisotropy layer 122 are mainly isolated with external environment condition by cushion coat 123; to carry out electromagnetic protection to homogeneous dielectric layer 121 and resistivity anisotropy layer 122; avoid surrounding environment especially largely on the impact of tester, ensure the stable of test environment electrical quantity.
In the embodiment of the application, the upper and lower relation of homogeneous dielectric layer 121 and resistivity anisotropy layer 122 can be exchanged.Also namely, resistivity anisotropy layer 122 also can be arranged at the top of homogeneous dielectric layer 121.
Isotropism conducting medium is provided with in homogeneous dielectric layer 121.In the embodiment of the application, the isotropism conducting medium arranged in homogeneous dielectric layer 121 is the salting liquid with certain electrical conductivity.
The stratomere that resistivity anisotropy layer 122 dummy level resistivity is different with vertical resistivity, for the test of the anisotropy detectivity of electromagnetic wave resistivity logging instrument provides testing circumstance, this stratomere is generally the thin mutual reservoir of husky mud stone.In the embodiment of the application, be arranged alternately the thin solid containing hole and liquid in resistivity anisotropy layer 122, the thin solid and the liquid that wherein contain hole have conductive capability separately.In the embodiment of the application, thin solid also can be isolator.
The embodiment of the application, by being arranged alternately thin solid containing hole and liquid, carrys out the stratomere that dummy level resistivity is different with vertical resistivity, to test the performance of logging instrument horizontal resistivity and vertical resistivity.
In the embodiment of the application, the resistivity value of resistivity anisotropy layer 122 can be changed as required.
In the embodiment of the application, although resistivity anisotropy layer 122 material used itself does not have anisotropy, by the stack combinations of whole material layer, macroscopically can be equivalent to anisotropic material, simulate the characteristic of anisotropic material with this.
Cushion coat 123 is arranged between homogeneous dielectric layer 121 and resistivity anisotropy layer 122 and the earth, and isolation ground resistivity is on the impact of homogeneous dielectric layer 121 and resistivity anisotropy layer 122.
In the embodiment of the application, be filled with isotropic conducting medium in cushion coat 123, such as salting liquid.For convenience of operation, in cushion coat 123, the resistivity of salting liquid can be consistent with the salting liquid resistivity of other layers in main water pot 10.Cushion coat 123 is the bigger the better highly in theory, but only need ensure in practical operation that various logger does not disturb by the earth response signal in resistivity anisotropy layer 122.
As shown in Figure 1, in the embodiment of the application, main water pot 10 can be arranged on insulating base 15.Because insulating base 15 and electrical resistivity of earth layer around are not easily measured, and very unstable with Changes in weather, and insulating support generally can be adopted to support main water pot 10, be not suitable for the test of homogeneous dielectric layer 121 and resistivity anisotropy layer 122 pairs of logging instrument.The embodiment of the application, the main water pot 10 including well layer 110 and model formation 120 is carried on insulating base 15, and surrounding environment can be avoided further on the impact of well layer 110 and model formation 120 etc.
In the embodiment of the application, high strength, alkali proof fiber can be adopted to strengthen polymer (FRP) muscle and to replace traditional reinforcing bar to build insulating base 15.For guarantee test environment is noninductive without magnetic, therefore have higher requirement to the construction of system ground, traditional reinforced concrete structure can not meet the instructions for use of this cover system.The embodiment of the application adopts the alkaline-resisting screw thread glass fiber reinforced plastic of high strength, carries out infrastructure in order to replace traditional reinforcing bar.
For convenience of the operation of operating personnel and operation, the embodiment of the application also comprises and is arranged on the peripheral and noninductive framework platform without magnetic of main water pot 10, convenient working personnel ascend operation.
Above-mentioned main water pot 10 and insulating base 15 can be collectively referred to as test subsystem.
As shown in Figure 2, the embodiment of the application can also comprise lifting transmission subsystem 20, lifting by crane logging instrument and providing electric power and communications facility for logging instrument, facilitating logging instrument to utilize this test subsystem to carry out various test when carrying out the test of logging instrument.
In the embodiment of the application, lifting transmission subsystem 20, primarily of pillar crane and logging cable composition, is for logging instrument provides the accessory system of power and power communications.Logging cable from ground system along tower fuselage, tower horn, suspension hook introduce logging instrument instrument string.Due to the design feature of pillar crane, can meet instrument ensure when testing in subsystem and testing around in 10 meters without metal (vertical direction logging cable does not affect well logging), avoid transmission line directly to cause the noninductive non-magnetic environment of ground failure from simulating well layer 110.During test, lifting transmission subsystem 20 can ensure that logging instrument carries out exchanges data with ground system and keeps powering while moving both vertically in test subsystem.
As shown in Figure 3, the embodiment of the application can also comprise dosing subsystem 30, be connected with the homogeneous dielectric layer 121 in model formation 120, resistivity anisotropy layer 122 and cushion coat 123, for the model formation 120 etc. in test subsystem provides the conducting medium with certain resistivity.In the embodiment of the application, conducting medium can be such as salting liquid, dosing subsystem 30 consist predominantly of in test subsystem, inject liquid injection pump, carry out from the excavationg pump of test subsystem extracted liquid and dosing subsystem 30 self the dosing drainage pump that discharges.In the embodiment of the application, in dosing subsystem 30, can also diving mixer be set.Required for test conducting liquid can stir rapidly by diving mixer at short notice.With traditional dependence water pot Inner eycle, salt is melted and make the uniform operating type of salt solution, the dosing subsystem 30 in the embodiment of the present application can save time and the energy in a large number.
Generally adopt the thin layer intermeshing of fixed resistance rate to come compared with simulation well resistivity anisotropy stratum with traditional analog environment, more easily can change the electrical conductivity (in other words resistivity) of anisotropic band as required compared with application.
Traditional simulation well does not design cushion coat compared with the present invention, and the impact that the earth produces test environment is obvious.Because the electrical quantity of the earth exists uncertain with weather, this impact is difficult to eliminate.The application, by arranging cushion coat, overcomes the external factors such as the earth to the impact of test environment, improves test accuracy.
Although the embodiment disclosed by the present invention is as above, the embodiment that described content only adopts for ease of understanding the present invention, and be not used to limit the present invention.Those of skill in the art belonging to any the present invention; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be carried out in the form implemented and details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (6)
1. one kind for testing the simulation well system of electromagnetic wave resistivity logging instrument, comprise for logging instrument provides the main water pot of test environment, model formation is set in main water pot and longitudinally runs through the well layer of described model formation central authorities, also comprise lifting transmission subsystem, dosing subsystem and insulating base, wherein:
Described well layer includes the simulation well that described electromagnetic wave resistivity logging instrument can pass through;
Described model formation includes the homogeneous dielectric layer of genesis analysis, resistivity anisotropy layer and cushion coat, the stratomere that described homogeneous dielectric layer dummy level resistivity is identical with vertical resistivity, the stratomere that described resistivity anisotropy layer dummy level resistivity is different with vertical resistivity, described homogeneous dielectric layer and resistivity anisotropy layer and external environment condition are isolated by described cushion coat, isolation ground resistivity is on the impact of homogeneous dielectric layer and resistivity anisotropy layer, various logger is not disturbed by the earth response signal in resistivity anisotropy layer,
Lifting transmission subsystem, lifts by crane described electromagnetic wave resistivity logging instrument when carrying out described test, for described electromagnetic wave resistivity logging instrument provides electric power and communications facility;
Dosing subsystem, for described model formation provides conducting medium;
Insulating base, carries described well layer and model formation, and described insulating base adopts high strength alkaline-resisting screw thread glass fiber reinforced plastic to replace traditional reinforcing bar.
2. system according to claim 1, wherein:
The thin solid containing hole and liquid is arranged alternately in described resistivity anisotropy layer.
3. system according to claim 2, wherein:
The described liquid of thin solid described in tool conductive capability and tool conductive capability is arranged alternately in described resistivity anisotropy layer.
4. system according to claim 2, wherein:
Be arranged alternately in described resistivity anisotropy layer and do not have the described liquid of thin solid described in conductive capability and tool conductive capability.
5. system according to claim 1, wherein:
The conducting medium of isotropic is filled with in described cushion coat.
6. system according to claim 1, wherein:
Described cushion coat is positioned at the below of described homogeneous dielectric layer and resistivity anisotropy layer.
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| CN105317428B (en) * | 2014-06-24 | 2019-05-07 | 中国石油天然气集团公司 | Determine the method and device of electromagnetic signal channel model |
| CN109577963A (en) * | 2018-10-19 | 2019-04-05 | 中国石油天然气股份有限公司 | Simulate the device and its construction method of the response of anisotropic formation array lateral logging |
| CN110107278A (en) * | 2019-04-11 | 2019-08-09 | 西南石油大学 | Open-hole logging processing simulation method |
| CN116084912A (en) * | 2021-11-08 | 2023-05-09 | 中国石油天然气集团有限公司 | Signal calibration device for multi-depth logging instrument |
| CN114135270A (en) * | 2021-11-19 | 2022-03-04 | 傅宇涵 | Oil and natural gas exploitation logging instrument in pit |
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| SU1509676A1 (en) * | 1987-02-24 | 1989-09-23 | Ленинградская лесотехническая академия им.С.М.Кирова | Apparatus for studying filter properties of fibrous masses |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |
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