CN107229083B - A kind of crack induction logging response simulator - Google Patents
A kind of crack induction logging response simulator Download PDFInfo
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- CN107229083B CN107229083B CN201610179062.2A CN201610179062A CN107229083B CN 107229083 B CN107229083 B CN 107229083B CN 201610179062 A CN201610179062 A CN 201610179062A CN 107229083 B CN107229083 B CN 107229083B
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V13/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups G01V1/00 – G01V11/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
- G01V3/26—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
- G01V3/28—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device using induction coils
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Abstract
The invention discloses a kind of crack induction logging response simulators, comprising: stratum simulated assembly is made of multiple conducting ring groups, conductive for simulated formation；Results of fracture simulation component is made of metal mesh group, is coupled with stratum simulated assembly, and simulated formation crack is used for；Induction logging simulated assembly, modeling logging instrument, for carrying out formation fracture induction logging measurement；Wellbore simulated assembly passes through metal mesh group and multiple conducting ring groups, for simulating borehole environment.The present invention can quantitatively determine induction logging response feature in crack under different parameters, establish fracture parameters quantitative evalution model, and then realize fracture evaluation by induction logging data.
Description
Technical field
The invention belongs to physical simulation techniques fields of logging well, specifically, more particularly to a kind of crack induction logging response
Simulator.
Background technique
Crack is not only important hydrocarbon pore volume, but also is the important migration pathway of low permeability reservoir.Whether fracture development,
It is directly related to oil-production capacity.With going deep into for oil-gas exploration and development work, the logging evaluation work of fracture-type reservoir is increasingly drawn
Play the attention of people.Fracture parameters evaluation is the important problem that well log interpretation faces, and resistivity logging is current conventional survey
The effective means in well evaluation crack.
In carbonate reservoir, since shoulder-bed resistivity (SBR) is higher, dual laterolog Formation Resistivity Measurement is mostly used.Mesh
Before have been developed that the imitative experimental appliance that fracture parameters influence dual laterolog response, carried out fracture parameters to bilateral
The experiment influenced to log response, has cleared the relationship of fracture parameters and dual laterolog response, has proposed fracture parameters bilateral
To Quantitative Evaluation with Well Logging model.
But in the relatively low sandstone of background resistivity, shale reservoir, induction logging is mostly used to measure.Currently, being directed to
The simulation analysis design that fracture parameters influence induction logging is less, coincide with actual conditions poor, and do not have in model
Consider the coupled relation in wellbore effect and crack and wellbore, stratum, only can fracture response carry out deterministic simulation, to hinder
Fracture parameters change the quantitative study influenced on induction logging, influence induction logging fracture parameters quantitative assessment.
Summary of the invention
In order to solve the above problem, the present invention provides a kind of crack induction logging response simulators, to accurate quantification
Simulation fracture induction logging response.
According to one embodiment of present invention, a kind of crack induction logging response simulator is provided, comprising:
Stratum simulated assembly is made of multiple conducting ring groups, conductive for simulated formation；
Results of fracture simulation component is made of metal mesh group, is coupled with the stratum simulated assembly, and simulated formation crack is used for；
Induction logging simulated assembly, modeling logging instrument, for carrying out formation fracture induction logging measurement；
Wellbore simulated assembly passes through the metal mesh group and multiple conducting ring groups, for simulating borehole environment.
According to one embodiment of present invention, the conducting ring group is made of annular concentric conducting ring, each ring shaped conductive
Ring concatenates standard resistance box to realize that each conductive loop resistance is controllable.
According to one embodiment of present invention, each conducting ring group by being fixed on same insulation board, between predetermined
Multiple concentric conducting rings away from arrangement are constituted.
According to one embodiment of present invention, the metal mesh group includes multiple metal meshes, the wire of the metal mesh
Diameter, the spacing between wire and the metal mesh it is adjustable.
According to one embodiment of present invention, the metal mesh group is connect with the conducting ring group by predetermined angle, to
Simulated formation is coupled with crack.
According to one embodiment of present invention, the induction logging simulated assembly runs through the conducting ring group and the metal
The center of net group.
According to one embodiment of present invention, the wellbore simulated assembly is the tubular portion for filling different resistivity conducting resinl
Part.
According to one embodiment of present invention, the tubular part is polyvinyl chloride pipe.
According to one embodiment of present invention, the simulator further includes for hanging and fixing the induction logging mould
The suspension fixation member of quasi- component.
According to one embodiment of present invention, the simulator further includes for acquiring and recording well logging inductive signal
Signal acquisition component.
Beneficial effects of the present invention:
The present invention can quantitatively determine induction logging response feature in crack under different parameters, establish fracture parameters quantitative assessment
Model, and then fracture evaluation is realized by induction logging data.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is required attached drawing in technical description to do simple introduction:
Fig. 1 is a kind of crack induction logging response simulator structural schematic diagram according to an embodiment of the invention；
Fig. 2 is conducting ring group structural schematic diagram according to an embodiment of the invention, and
Fig. 3 is conductive mesh structural schematic diagram according to an embodiment of the invention；
Wherein, 1. metal mesh；2. conducting ring；3. induction logging instrument；4. chain connected nut；5. logging cable；6. top sheave；
7. bracket；8. lower sheave bracket；9. lower sheave；10. computer；11. induction logging collecting part；12. winch；13. conductive mesh
Retained part；14. conducting resinl；15.PVC pipe；16. transverse conductance silk；17. longitudinal conductive filament；18. insulation board.
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to apply to the present invention whereby
Technological means solves technical problem, and the realization process for reaching technical effect can fully understand and implement.It needs to illustrate
As long as not constituting conflict, each feature in each embodiment and each embodiment in the present invention can be combined with each other,
It is within the scope of the present invention to be formed by technical solution.
As shown in Figure 1, crack induction logging response simulator of the invention includes stratum simulated assembly, results of fracture simulation group
Part, induction logging simulated assembly and wellbore simulated assembly.Wherein, stratum simulated assembly is made of multiple conducting ring groups, is used for mould
Quasi- stratum is conductive；Results of fracture simulation component is made of metal mesh group, is coupled with stratum simulated assembly, and simulated formation crack is used for；Sense
Should log well simulated assembly modeling logging instrument (the usual induction logging simulated assembly can directly choose actual logger), use
In progress formation fracture induction logging measurement；Wellbore simulated assembly passes through metal mesh group and multiple conducting ring groups, for simulating well
Ocular environment.
The crack induction logging response simulator simple structure, it is easy to accomplish, by adjusting the ginseng of multiple conducting ring groups
Number is conductive to simulate different resistivity stratum, and the crack of different situations is simulated by adjusting the parameter of metal mesh group, so as to
To quantitatively determine the crack induction logging response feature under different parameters, fracture parameters quantitative evalution model is established, and then pass through
Induction logging data realizes fracture evaluation.Meanwhile simulator of the invention can be used for the research and development of induction logging instrument, carve
Degree and induction well logging method principle demonstration teaching.
In one embodiment of the invention, conducting ring group is made of annular concentric wire, each conducting ring concatenation mark
Quasi- resistance box is controllable to realize each conductive loop resistance.
In one embodiment of the invention, each conducting ring group by being fixed on same insulation board 18, with preset space length
Multiple concentric conducting rings 2 of arrangement form, as shown in Figure 3.The conductive effect on stratum can it is equivalent at multiple with the exhausted of conductive filament
The conductive effect of listrium is superimposed.3 center of induction logging instrument is placed in conducting ring group center when measurement.By adjusting conducting ring 2
Resistivity, the influence of different basement rock resistivity fracture formation induction log responses can be simulated, solve different basement rock
Induction logging response feature quantitative simulation in crack measures problem under resistivity conditions.
It is produced on concentric conducting ring 2 fixed on insulation board 18, is arranged at a certain pitch and carrys out simulated formation conductive effect, together
The equivalent formation conductivity of heart conducting ring group can be calculated according to following formula:
Wherein, σaFor the equivalent resistivity of conducting ring group, giFor the cell rings geometrical factor of i-th of conducting ring position,
DiFor i-th of conductive ring diameter, RiFor i-th of conducting ring series resistor value.Adjust conductive ring diameter, spacing makes multiple groups conducting ring
Equivalent space resistivity is equal to formation resistivity.In this way, conducting ring group equivalent simulation different resistivity stratum can be used.
In one embodiment of the invention, metal mesh group includes multiple metal meshes 1, and metal mesh 1 is by metal wire knitted system
At between the diameter of, wire, wire spacing and metal mesh it is adjustable.Specifically, as shown in Fig. 2, using laterally
Conductive filament 16 and longitudinal conductive filament 17 weave square conductive metal mesh 1, and metal mesh surface resistivity can be according to surface resistivity formula
It calculates, adjusts wire diameter dwAnd wire spacing hwSo that metal mesh resistivity is equal to given crack resistivity.In this way, can
With the crack of different resistivity in the metal mesh equivalent simulation stratum with different resistivity.By the size for adjusting conductive metal mesh
The log response in different development length cracks can be simulated.Multiple metal meshes are set, it can simulate the crack in multiple stratum.
In one embodiment of the invention, metal mesh group is connect with conducting ring group by predetermined angle, to simulated formation
It is coupled with crack.Specifically, metal mesh 1 welds together with concentric 2 contact position of conducting ring by conducting resin adhesion or by metal,
With the coupling of simulated formation and crack.As shown in Figure 1, metal mesh 1 is fixed by clamper 13, by the metal mesh 1 of simulation fracture with
The concentric conducting ring 2 of simulated formation intercouples welding by angle α, with the crack for being α with stratum angle in simulated formation.For
Other inclination angle cracks can make different angle models and be simulated.
In one embodiment of the invention, induction logging simulated assembly 3 runs through the center of conducting ring group and metal mesh group,
As shown in Figure 1.Setting can protrude into situation about having in crannied stratum in this way with analogue inductive logger.
In one embodiment of the invention, wellbore simulated assembly 15 is the tubulose knot for filling different resistivity conducting resinl 14
Structure.The tubular structure includes polyvinyl chloride pipe (pvc pipe).The conduction pvc pipe, which simulates wellbore, makes conduction wherein filling conducting resinl
Glue resistivity is equal to mud resistivity in wellbore.The conductive pvc pipe for simulating wellbore is placed in conducting ring 2 and metal mesh group
Induction logging simulated assembly 3 is set to conductive pvc pipe center, completes the modelling of fracture formation induction logging by the heart.
For induction logging simulated assembly 3 to be fixed in wellbore simulated assembly 15, which further includes for hanging
And the suspension fixation member of fixed induction logging instrument.Specifically, as shown in Figure 1, the suspension fixation member includes logging cable
5, bracket 7, top sheave 6, lower sheave 9, lower sheave bracket 8 and winch 12, top sheave 6 is fixed on bracket 7, by lower sheave
9 are fixed on lower sheave bracket 8, link logging cable 5 and induction logging instrument 3 by chain connected nut 4, logging cable 5 is another
End connects the signal acquisition component for acquiring and recording well logging inductive signal around top sheave 6, lower sheave 9 by winch 12.
The signal acquisition component include induction logging instrument ground signal acquisition system 11 and for handling, the computer of storing data
10。
Induction logging response simulator in crack of the present invention, simple structure, it is easy to accomplish, it can be by adjusting gold
Belong to the spacing between the conductive wire diameter and conductive wire of net 1 to simulate the induction logging in different resistivity crack and ring
It answers；The survey of different angle crack (such as horizontal joint, oblique seam, upright seam) is simulated by adjusting metal mesh and multiple groups conducting ring angle
Well response；Different development length INTERVAL FRACTURE LOG RESPONSE METHODs are simulated by adjusting metal mesh size；By adjusting different metal net spacing
Simulate different spacing crack group log responses；It is split under the conditions of conducting resinl resistivity simulation difference mud by adjusting simulation mud
Response characteristic is stitched, by the shadow for adjusting the resistivity fracture formation induction log response of conducting ring resistivity simulation difference basement rock
It rings, realizes different fracture parameters induction logging response feature quantitative simulation measurement problems.
Measurement result of the invention can quantitatively determine induction logging response feature in crack under different parameters, establish crack ginseng
Number quantitative evalution model, and then fracture evaluation is realized by induction logging data.
When using simulator work, induction log tool 3 is controlled by winch 12 first and is located at simulation wellbore (PVC
Pipe) 15 bottom end.By induction logging signal acquisition part 11, power to induction log tool 3, emission lines in induction log tool 3
For alternating current in circle in space excitation electromagnetic field, which will be in the metal mesh 1 and multiple groups of the simulation fracture to intercouple
Induced current is generated in the conducting ring 2 of simulated formation, the faradic size and 1 resistivity of conductive metal mesh, metal mesh 1 are long
Degree, 2 resistivity of conducting ring, the two angle α, the conducting resinl 14 resistivity correlation for simulating wellbore.The induced current will swash in space
Secondary electromagnetic field is sent out, secondary electromagnetic field signal is detected by 3 receiving coil of induction logging simulated assembly, and then by induction logging signal
Collecting part acquisition, passes through induction logging processing software record storage existing in computer 10.This completes induction loggings
Simulated assembly 3 is measured in pvc pipe bottom end depth point, is then slowly mentioned induction logging instrument 3 in pvc pipe by winch 12
It rises, completes induction logging response measurement at different depth point in entire model, got off by 10 record storage of computer, so just
Complete the simulation of induction logging response under single fracture parameters.
Make both different resistivity metal mesh 1, different resistivity multiple groups conducting ring 2, different angle model, different side lengths
Square-shaped metal net 1,14 model of different resistivity conducting resinl, i.e. analog difference crack resistivity, Different Strata resistivity, no
Same fracture dip, different fracture penetrations and different mud resistivity model induction logging response features.
While it is disclosed that embodiment content as above but described only to facilitate understanding the present invention and adopting
Embodiment is not intended to limit the invention.Any those skilled in the art to which this invention pertains are not departing from this
Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But scope of patent protection of the invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of crack induction logging response simulator, comprising:
Stratum simulated assembly is made of multiple conducting ring groups, conductive for simulated formation；
Results of fracture simulation component is made of metal mesh group, is coupled with the stratum simulated assembly, and simulated formation crack is used for；
Induction logging simulated assembly, modeling logging instrument, for carrying out formation fracture induction logging measurement；
Wellbore simulated assembly passes through the metal mesh group and multiple conducting ring groups, for simulating borehole environment.
2. simulator according to claim 1, which is characterized in that the conducting ring group is by annular concentric conducting ring structure
At each annular conductive rings concatenation standard resistance box is controllable to realize each conductive loop resistance.
3. simulator according to claim 1 or 2, which is characterized in that each conducting ring group is same by being fixed on
It is constituted on insulation board, with multiple concentric conducting rings that preset space length arranges.
4. simulator according to claim 1, which is characterized in that the metal mesh group includes multiple metal meshes, described
Spacing and the metal mesh between the diameter of the wire of metal mesh, wire it is adjustable.
5. simulator according to claim 4, which is characterized in that the metal mesh group and the conducting ring group are by predetermined
Angle connection, couples to simulated formation with crack.
6. simulator according to claim 1, which is characterized in that the induction logging simulated assembly runs through the conduction
The center of ring group and the metal mesh group.
7. simulator according to claim 1, which is characterized in that the wellbore simulated assembly is filling different resistivity
The tubular part of conducting resinl.
8. simulator according to claim 7, which is characterized in that the tubular part is polyvinyl chloride pipe.
9. simulator according to claim 1, which is characterized in that the simulator further includes for hanging and fixing
The suspension fixation member of the induction logging simulated assembly.
10. simulator according to claim 1, which is characterized in that the simulator further includes for acquiring and remembering
The signal acquisition component of record well logging inductive signal.
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| CN201610179062.2A CN107229083B (en) | 2016-03-25 | 2016-03-25 | A kind of crack induction logging response simulator |
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| CN201610179062.2A CN107229083B (en) | 2016-03-25 | 2016-03-25 | A kind of crack induction logging response simulator |
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| CN109901230B (en) * | 2019-04-02 | 2020-08-11 | 中国科学院地质与地球物理研究所 | Equipment for temperature correction and deep stratum environment simulation of induction logging instrument |
| CN114076781B (en) * | 2020-08-20 | 2024-03-19 | 中国石油化工股份有限公司 | Experimental device, system and method for simulating electric logging response of formation fracture |
| CN113219141B (en) * | 2021-06-01 | 2023-03-14 | 盾构及掘进技术国家重点实验室 | Grooved pipe device for micro-fracture development characteristics in tunnel surrounding rock and monitoring method |
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| US8428923B2 (en) * | 1999-04-29 | 2013-04-23 | Schlumberger Technology Corporation | Method system and program storage device for simulating a multilayer reservoir and partially active elements in a hydraulic fracturing simulator |
| CN101609170B (en) * | 2009-07-14 | 2011-03-30 | 中国海洋石油总公司 | Simulation well device for three-dimensional induction logging experiments |
| US9057799B2 (en) * | 2012-03-19 | 2015-06-16 | Baker Hughes Incorporated | Induction logging signals and directional guidance antenna systems |
| CN104564036B (en) * | 2013-10-09 | 2018-10-26 | 中国石油集团长城钻探工程有限公司 | The bearing calibration of induction logging Kelvin effect |
| CN105019892B (en) * | 2015-07-03 | 2018-09-21 | 中国石油大学(华东) | A method of simulation fracture hole type Reservoir Body electric logging response |
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