CN205477605U - Crack - matrix coupling of simulated formation condition is flowed and is harmd evaluation device - Google Patents
Crack - matrix coupling of simulated formation condition is flowed and is harmd evaluation device Download PDFInfo
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- CN205477605U CN205477605U CN201620303259.8U CN201620303259U CN205477605U CN 205477605 U CN205477605 U CN 205477605U CN 201620303259 U CN201620303259 U CN 201620303259U CN 205477605 U CN205477605 U CN 205477605U
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Abstract
The utility model discloses a crack - matrix coupling of simulated formation condition is flowed and is harmd evaluation device, the device is mainly by the cauldron body (4), rock core (1), crack (6), simulation well (7), pressure boost capsule (3), resistance probe (16), pressure sensor (18), data acquisition system (17), working solution circulation system constitutes, be equipped with in the cauldron body (4) rock core (1), wrap up around the rock core pressure boost capsule (3), the cauldron body has the axle load filling opening, confined pressure filling opening and air inlet, there are crack (6) and simulation well (7) in the rock core, and the distribute drilling of 9 dark rock -entering hearts, there is resistance probe (16) in the drilling, resistance probe connection pressure sensor (18), data acquisition system (17) are connected with pressure sensor to the resistance probe, working solution circulation system is connected to simulation well (7). The utility model discloses the principle is reliable, convenient operation, and the all secondary stress conditions of well and the stratum radial flow that can simulate crack - matrix system confirm crack - matrix system extent of damage, can make more scientific, accurate quantification reservoir harm evaluation.
Description
Technical field
This utility model relates to Low permeability and competent sand and shale formation damage evaluating technical field, particularly relates to a kind of simulated formation bar
The fracture matrix Coupled Flow damage appraisement device of part.
Background technology
The feature that tight sand and shale have low hole, hypotonic and clay mineral content is high, its complex pore structure, pole, duct
It is small, fracture development imperfection.Tight sand and shale gas reservoir typically require use fracturing technique to link up natural seam, formation
Artificial seam, to reach volume increase or the purpose gone into operation.But fracturing fluid enters crack-matrix system and reservoir can produce working solution infringement,
And crack damages owing to being easily subject to fluid structurecoupling by the effect of well week secondary stress.Therefore, scientific and reasonable fracture substrate
System carries out formation damage experimental evaluation, contributes to recognizing tight sand and shale gas reservoir fracture matrix system under actual condition
Damaging mechanisms and more science, assessment is drilled well and single well productivity is caused by storey increase design process accurately impact.
The indoor evaluation method of formation damage specifically include that rock core flowing experiment method (the burnt spring is gorgeous. ultra-low penetration sandstone stores up
Ply stress sensitivity experiments. petroleum journal, 03 phase in 2011；Wu Yahong etc. low permeability reservoir sensitivity experiments method and evaluation are ground
Study carefully. drilling technique, 05 phase in 2009), core analysis technology (Lee builds. simple analysis core analysis technology and application prospect prospect. and section
Skill and enterprise, 02 phase in 2012；Li Taiwei etc. the fracturing fluid nuclear magnetic resonance technique evaluation methodology to reservoir damage. Chongqing science and technology
Institute's journal: natural science edition, 06 phase in 2014), and the method for numerical simulation (Yang Yugui etc. Horizontal Well Drilling well well completion fluid is invaded
Enter to damage Advances in Numerical Simulation. working solution and completion fluid, 06 phase in 2009；Wang Ke etc. fractured reservoir stress sensitivity
Numerical simulation is as a example by the deep gas field of car down warping region gram, storehouse. petroleum journal, 01 phase in 2014).But rock core flowing experiment and rock
Heart analytical technology is confined to the mechanistic qualitative analysis of rock core damage, and the method for numerical simulation then lacks the most rational analog
It is verified.Present stage has seen clearly the dominant mechanism of formation damage the most substantially, therefore should be from fixed for formation damage evaluating
Property moves towards the stage of quantification, also should develop a set of more science, the evaluation methodology of quantification.
Disclosed in patent CN104677805A, a kind of rock core damage experimental provision includes core holding unit and pollutes still two parts,
Test integrated to rock core pollution course and seepage flow and overall process is kept the simulation radially pressure reduction of rock core, it is to avoid anthropic factor causes
Experimental error.
Disclosed in patent CN104122181A, a kind of working fluid utilizes two core holding units to reservoir permeability damage appraisement device
Apply two axial forces and three axial forces respectively, simulate the conditions such as different subsurface environment, temperature, pressure and vacuum,
After the waveform that agitator sends passes contaminated rock core, waveform changes to calculate permeability impairment degree.
A kind of method for testing flow conductivity of self-supported crack in riverfrac treatment, rock core grasping system disclosed in patent CN102174883A
Fracture wall both sides apply confined pressure and temperature with simulated formation crack by the condition such as closure stress and temperature, test crack and send out
Flow conductivity change before and after raw infringement.
Above-mentioned analog is confined to substrate or crack individually carry out infringement simulation, however formation damage is made science,
Evaluating accurately and carry out damage appraisement by fracture matrix system, currently available technology cannot true simulation fracture substrate system
The well week secondary stress and the Radial Flow on stratum that system is subject to, therefore uses Practical Project and does not have the biggest reference value.
Utility model content
The purpose of this utility model is to provide the fracture matrix Coupled Flow damage appraisement device of simulation stratum condition, for mould
Intend the well week secondary stress condition and stratum Radial Flow suffered by true formation fracture matrix system, crack can be recorded
Water saturation, pressure and gas flow change before and after matrix system infringement, to determine fracture matrix system damage degree, more
Mend the deficiency of existing formation damage evaluating device.
For reaching above technical purpose, this utility model provides techniques below scheme.
The fracture matrix Coupled Flow damage appraisement device of simulation stratum condition, mainly by rock core and kettle system, stress loading
System, sense and monitoring system, working solution circulating system, a few part of Flow Measuring System composition, specifically include rock core, filter screen,
Simulation well, crack, rubber blanket, axial compression supercharging seal capsule, confined pressure supercharging seal capsule, electric hydraulic pump, pressure sensing
Device, Resistance probe, water tank, valve, Pressure gauge, dosing pump, gas-liquid separator, gas flowmeter, gas cylinder, data acquisition
System, air relief valve, counterbalance valve.
Described rock core is axially and circumference is all wrapped in supercharging seal capsule, and the circumference directly contacted with rock core is also enclosed with a metafiltration
Net, seal capsule can be with rock core free deformation with entering to keep pressure to act on rock sample, and seal capsule outer layer is for being used for clamping rock core
Kettle, rock core kettle uses flange and bolt fastening structure, is in sealing state, have outside rock core kettle pressure inlet and
Air inlet, pressure inlet connects electric hydraulic pump, and air inlet connects gas cylinder；Rock core central authorities have well, described well to be at rock
In the heart, lower end cap central authorities bore an isometrical vertical holes, hole depth runs through whole rock core, at rock core top end cap centered by well,
Being distributed 9 borings going deep into rock core, each boring and the oculocentric radial distance of well are according to log series model, and boring is in same level
Being wired to swirling on face, each drilling depth is equidistant successively decreases, and can transfer Resistance probe in boring, and probe connects pressure biography
Sensor；Well connects working solution circulating system and gas flowmeter；One layer of rubber blanket is placed in described rock core crack；Described work
Making fluid circulation to be made up of water tank, valve, dosing pump, flow meter, gas-liquid separator and counterbalance valve, described counterbalance valve connects
Well head；Described gas flowmeter connects gas-liquid separator.
Wrapping up supercharging seal capsule around rock core is to apply axial compression and confined pressure to rock core, and electric hydraulic pump is toward in seal capsule
Portion injects liquid and applies pressure to rock, with the well week secondary stress under simulated formation full-scale condition；Rock core is wrapped circumferentially around a metafiltration
Net so that the gas flowed into from kettle air inlet can flow into substrate from substrate external boundary；One layer of rubber blanket is placed in described crack,
Crack is blocked by rubber blanket deformation energy under axial compressive force effect such that it is able to be individually evaluated matrix damage；Rock core kettle
It is in sealing state, in order to accurately to measure gas flow；The gas cylinder that kettle air inlet connects can gas injection in substrate and crack in the past,
Gas flows out in well and is recycled to well head；Make a call to 9 borings going deep into rock core and radial distance oculocentric with well according to logarithm
Distribution, is because the pressure from well to external boundary and declines in logarithmic distribution, and therefore Resistance probe and pressure transducer are close
Well periphery is the most intensive, near external boundary the most sparse so that detect resistance, pressure data record the most reasonable；Electricity
It is for observed data situation of change on vertical that resistance probe and pressure transducer transfer equidistant the successively decreasing of the degree of depth；In blood circulation
Water tank in well, inject a certain amount of working solution by dosing pump, working solution injects from shaft bottom and circulates away from well head again, is
Because working solution flows out first contact shaft bottom in drill string and is recycled to well head in real well；Counterbalance valve can be used for work liquid application
Add back pressure；Counterbalance valve connects has gas-liquid separator, treatment fluid flow air inlet liquid/gas separator by gas-liquid separation, to be connected with gas-liquid separator
Gas flowmeter will record along with rock core damage process, the gas flow situation of change of stratum simulation radial flow, gas-liquid separator
Isolated liquid is by reflow tank.
This utility model by data collecting system and the pressure of gas flowmeter record fracture matrix system, resistivity and
The data variation of gas flow, owing to simulating rock core real well week secondary stress and Radial Flow, can by Data Comparison
Intuitively fracture matrix system under the conditions of stratum is made Coupled Flow damage appraisement.
Compared with prior art, the beneficial effects of the utility model are:
(1) crack under true subterranean wells week secondary stress, real work liquid cyclic process and stratum Radial Flow can be simulated
Matrix system working solution damages；
(2) fracture and substrate respectively can be realized by the filter screen of parcel around the rubber blanket in crack and rock core and carry out work
Making liquid damage evaluation, it is also possible to by the size of both Data Comparisons gas flow, i.e. the two accounts for fracture matrix system gas stream
The difference of specific gravity of amount；
(3) use Resistance probe to connect pressure transducer and can measure the resistance within rock core and pressure data, truly reflect rock
The intrapore fluid flow state of heart course of damage；Resistance probe and sensor are carried out swirling distribution, it is possible to more reasonably
Record the pressure of Coupled Flow course of damage fracture matrix system, resistivity data, establish for scientific and reasonable appraisal
Data basis；
(4) simple in construction, principle is reliable, easy to operate, and whole simulation course of damage is directly perceived, clear.
Accompanying drawing explanation
Fig. 1 is the overall construction drawing of the fracture matrix Coupled Flow damage appraisement device of simulation stratum condition.
Fig. 2 is to go deep into the distribution of boreholes top view (inner circle is the borehole wall, and cylindrical is rock core external boundary) in rock core.
In figure: 1. rock core；2. filter screen；3. supercharging capsule；4. kettle；5. rubber blanket；6. crack；7. simulation well；8. cavity；9.
Valve；10. hydralic pressure gauge；11. dosing pumps；12. flow meters；13. water tanks；14-A. electrohydraulic cylinder one；14-B. electrohydraulic cylinder two；
15-A. electric hydraulic pump one；15-B. electric hydraulic pump two；16. Resistance probes；17. data collecting systems；18. pressure transducers；
19. counterbalance valves；20. gas-liquid separators；21. gas flowmeters；22. air relief valve；23. gas cylinders.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings, but is not limited to this.
Referring to Fig. 1, Fig. 2.
The fracture matrix Coupled Flow damage appraisement device of simulation stratum condition, by kettle 4, rock core 1, crack 6, simulation well
Eye 7, supercharging capsule 3, electrohydraulic cylinder one 14-A, electrohydraulic cylinder two 14-B, electric hydraulic pump one 15-A, electric hydaulic
Pump two 15-B, gas cylinder 23, Resistance probe 16, pressure transducer 18, data collecting system 17, working solution circulating system form.
Built with rock core 1, rock core 1 surrounding parcel supercharging capsule 3, between supercharging capsule 3 and kettle 4, there is cavity in described kettle 4
8, kettle has axial compression inlet, confined pressure inlet and air inlet, axial compression inlet connects electrohydraulic cylinder two 14-B and electricity
Hydrodynamic press pump two 15-B, confined pressure inlet connects electrohydraulic cylinder one 14-A and electric hydraulic pump one 15-A, and air inlet is by subtracting
Pressure valve 22 connects gas cylinder 23.
Having crack 6, rock core axial centre to have simulation well 7 in described rock core, described simulation well 7 is to bore one in rock core central authorities
Isometrical vertical holes, hole depth runs through whole rock core, at rock core top end cap centered by well 7, is distributed 9 brills going deep into rock core
, there is Resistance probe 16 in hole in boring, Resistance probe connects pressure transducer 18, and Resistance probe and pressure transducer are all connected with data
Acquisition system 17.
Described simulation well 7 connects working solution circulating system, and described working solution circulating system includes valve 9, hydralic pressure gauge 10, meter
Amount pump 11, flow meter 12, water tank 13, counterbalance valve 19, gas-liquid separator 20, well 7 lower end is sequentially connected with valve 9, liquid
Pressure table 10, dosing pump 11, flow meter 12 and water tank 13, well 7 upper end connects gas-liquid separator 20 by counterbalance valve 19,
Gas-liquid separator 20 connects water tank 13, and gas-liquid separator 20 is also connected with gas flowmeter 21.
Described at rock core top end cap centered by well 7, be distributed 9 borings going deep into rock core, described boring is in same level
Be wired to swirling (Fig. 2) on face, each boring and the oculocentric radial distance of well according to log series model, each drilling depth
Equidistant successively decrease.
Described rock core circumference external boundary wraps up in one layer of detachable filter screen 2, and filter screen is removed, and gas directly flows to well 7 in crack 6,
Can be used to the infringement of independent fracture be evaluated.
Placing one layer of detachable rubber blanket 5 in described rock core crack 6, rubber blanket is deformed upon by axial compressive force effect can be complete
Blocking crack, crack is blocked then gas and is only flowed into simulation well 7 from matrix pores, can be used to individually comment matrix damage
Valency.
Remove rubber blanket 5 in crack 6, and rock core circumference external boundary wraps filter screen 2, then gas is from fracture matrix dual media stream
Enter well 7, carry out Coupled Flow damage appraisement for fracture matrix system.
Gas generation process when simulation does not damages: axial compression and confined pressure are adjusted to preset value, uses gas cylinder 23 to continue toward kettle 4
Air inlet gas injection, gas flows through substrate and crack 6 enters well 7 and then flows out from well head, is observed by gas flowmeter 21
After stablizing to gas flow, record the now pressure of rock core, resistance data by data collecting system 17, pass through gas flowmeter
21 record gas production before now gas flow damages as fracture matrix system.
Independent measurement crack or the data of substrate: keep axial compression and confined pressure constant, use rubber blanket 5 fracture spaces 6 to be blocked up
Live, allow gas flow into from substrate circumference external boundary, the pressure of record rock core substrate and data on flows；Rubber blanket 5 is taken out,
Remove the filter screen 2 of parcel around rock core, allow gas flow in crack 6, the data on flows in record crack.
Simulation fracture matrix system Coupled Flow course of damage: keep axial compression and confined pressure constant, by the rubber blanket 5 in crack
Take out, around rock core, wrap up filter screen 2, use gas cylinder 23 continuously toward gas injection in kettle.Open working solution circulating system by water tank 13
Interior working solution pumps in well 7, opens counterbalance valve 19 and applies back pressure to working solution；Working solution is recycled to the same of well head from shaft bottom
Time, can constantly invade fracture matrix system and cause Coupled Flow to damage it, cause the Resistance probe 16 inserted in rock core 1 to be visited
The resistivity surveyed constantly reduces, simultaneously the pressure data of the pressure transducer 18 detectable corresponding site hole that Resistance probe connects；
Along with the carrying out of infringement, the gas flow of gas flowmeter 21 record is gradually lowered, and when flow tends towards stability, coupling stream is described
Dynamic infringement has been maxed out；The omnidistance Usage data collection system 17 of infringement gathers the pressure in rock core, resistance data, gas stream
Gauge 21 records the gas flow data gone out from gas-liquid separator separates.
Crack or the data of substrate during the circulation of independent measurement working solution: keeping axial compression and confined pressure constant, gas cylinder is ventilated continuously,
Working solution circulating system is properly functioning；Use rubber blanket 5 fracture spaces 6 to be blocked, allow gas flow into from substrate circumference external boundary
Well 7, Usage data collection system 17 and gas flowmeter 21 record the pressure of rock core substrate, resistance and data on flows；
Rubber blanket 5 is taken out, removes the filter screen 2 of parcel around rock core, allow gas flow in crack 6, by gas flowmeter 21
The data on flows in record crack.
Measure fracture matrix data when circulating without working solution: keep axial compression and confined pressure constant, close working solution circulating system,
Working solution is discharged, repeats first step and can measure pressure, resistance and the flow after fracture matrix system is damaged
Data, repeating second step can fracture and substrate measure respectively.
Claims (4)
1. the fracture matrix Coupled Flow damage appraisement device of simulation stratum condition, by kettle (4), rock core (1), crack (6),
Simulation well (7), supercharging capsule (3), electrohydraulic cylinder one (14-A), electrohydraulic cylinder two (14-B), electric hydaulic
Pump one (15-A), electric hydraulic pump two (15-B), gas cylinder (23), Resistance probe (16), pressure transducer (18),
Data collecting system (17), working solution circulating system form, it is characterised in that described kettle (4) built with rock core (1),
Wrap up supercharging capsule (3) around rock core, there is cavity (8) between supercharging capsule and kettle, kettle has axial compression inlet, encloses
Pressure injection entrance and air inlet, axial compression inlet connects electrohydraulic cylinder two (14-B) and electric hydraulic pump two (15-B),
Confined pressure inlet connects electrohydraulic cylinder one (14-A) and electric hydraulic pump one (15-A), and air inlet passes through air relief valve (22)
Connect gas cylinder (23)；Having crack (6) in described rock core, rock core axial centre has simulation well (7), described simulation well
(7) being to bore an isometrical vertical holes in rock core central authorities, hole depth runs through whole rock core, in rock core top end cap with well is
The heart, is distributed 9 borings going deep into rock core, has Resistance probe (16) in boring, and Resistance probe connects pressure transducer (18),
Resistance probe and pressure transducer are all connected with data collecting system (17)；Described simulation well (7) connects working solution cyclic system
System, described working solution circulating system includes valve (9), hydralic pressure gauge (10), dosing pump (11), flow meter (12), water
Case (13), counterbalance valve (19), gas-liquid separator (20), well lower end be sequentially connected with valve (9), hydralic pressure gauge (10),
Dosing pump (11), flow meter (12) and water tank (13), well upper end connects gas-liquid separator (20) by counterbalance valve (19),
Gas-liquid separator connects water tank, and gas-liquid separator is also connected with gas flowmeter (21).
2. the fracture matrix Coupled Flow damage appraisement device of simulation stratum condition as claimed in claim 1, it is characterised in that institute
Stating at rock core top end cap centered by well (7), be distributed 9 borings going deep into rock core, described boring is in same level
Being wired to swirling on face, each boring and the oculocentric radial distance of well are according to log series model, and each drilling depth is equidistant
From successively decreasing.
3. the fracture matrix Coupled Flow damage appraisement device of simulation stratum condition as claimed in claim 1, it is characterised in that institute
Stating rock core circumference external boundary and wrap up in one layer of detachable filter screen (2), filter screen is removed, and gas directly flows to mould in crack (6)
Intend well (7), be evaluated for the infringement of independent fracture.
4. the fracture matrix Coupled Flow damage appraisement device of simulation stratum condition as claimed in claim 1, it is characterised in that institute
Placing one layer of detachable rubber blanket (5) in stating rock core crack (6), rubber blanket is deformed upon by axial compressive force effect can be complete
Entirely blocking crack, crack is blocked then gas and is only flowed into simulation well (7) from matrix pores, is used for individually entering matrix damage
Row is evaluated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620303259.8U CN205477605U (en) | 2016-04-12 | 2016-04-12 | Crack - matrix coupling of simulated formation condition is flowed and is harmd evaluation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620303259.8U CN205477605U (en) | 2016-04-12 | 2016-04-12 | Crack - matrix coupling of simulated formation condition is flowed and is harmd evaluation device |
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| CN205477605U true CN205477605U (en) | 2016-08-17 |
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| CN201620303259.8U Expired - Fee Related CN205477605U (en) | 2016-04-12 | 2016-04-12 | Crack - matrix coupling of simulated formation condition is flowed and is harmd evaluation device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756674A (en) * | 2016-04-12 | 2016-07-13 | 西南石油大学 | Crack-substrate coupling flow damage evaluating device and method by simulating formation conditions |
| CN109989737A (en) * | 2018-01-03 | 2019-07-09 | 中国石油化工股份有限公司 | A method of realizing rock self-supporting crack |
| CN110018105A (en) * | 2019-04-29 | 2019-07-16 | 中国石油大学(北京) | Matrix-Fracture System gas simulated flowing apparatus and method |
| CN110044772A (en) * | 2019-04-13 | 2019-07-23 | 太原理工大学 | A kind of visualization gas liquid two-phase flow coupling experiment device |
| CN110242290A (en) * | 2019-06-25 | 2019-09-17 | 中国石油集团川庆钻探工程有限公司 | Shale core bedding crack flow simulation evaluation device and method |
| CN111720117A (en) * | 2020-06-30 | 2020-09-29 | 中国石油大学(北京) | Oil and gas well productivity evaluation experiment method considering different well completion modes |
| CN114776285A (en) * | 2022-04-26 | 2022-07-22 | 西南石油大学 | Device for evaluating contribution of fracture filling and perforation capacity of highly-deviated well |
-
2016
- 2016-04-12 CN CN201620303259.8U patent/CN205477605U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756674A (en) * | 2016-04-12 | 2016-07-13 | 西南石油大学 | Crack-substrate coupling flow damage evaluating device and method by simulating formation conditions |
| CN105756674B (en) * | 2016-04-12 | 2023-02-21 | 西南石油大学 | Fracture-matrix coupling flow damage evaluation device and method for simulating formation conditions |
| CN109989737A (en) * | 2018-01-03 | 2019-07-09 | 中国石油化工股份有限公司 | A method of realizing rock self-supporting crack |
| CN110044772A (en) * | 2019-04-13 | 2019-07-23 | 太原理工大学 | A kind of visualization gas liquid two-phase flow coupling experiment device |
| CN110018105A (en) * | 2019-04-29 | 2019-07-16 | 中国石油大学(北京) | Matrix-Fracture System gas simulated flowing apparatus and method |
| CN110242290A (en) * | 2019-06-25 | 2019-09-17 | 中国石油集团川庆钻探工程有限公司 | Shale core bedding crack flow simulation evaluation device and method |
| CN111720117A (en) * | 2020-06-30 | 2020-09-29 | 中国石油大学(北京) | Oil and gas well productivity evaluation experiment method considering different well completion modes |
| CN114776285A (en) * | 2022-04-26 | 2022-07-22 | 西南石油大学 | Device for evaluating contribution of fracture filling and perforation capacity of highly-deviated well |
| CN114776285B (en) * | 2022-04-26 | 2024-05-31 | 西南石油大学 | High-inclination well fracturing filling crack and hole productivity contribution evaluation device |
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