CN107725046A - The apparatus and method of capillary force during a kind of evaluation reservoir water - Google Patents
The apparatus and method of capillary force during a kind of evaluation reservoir water Download PDFInfo
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- CN107725046A CN107725046A CN201710965248.5A CN201710965248A CN107725046A CN 107725046 A CN107725046 A CN 107725046A CN 201710965248 A CN201710965248 A CN 201710965248A CN 107725046 A CN107725046 A CN 107725046A
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- rock core
- plug
- pressure
- capillary force
- displacement
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000011156 evaluation Methods 0.000 title claims description 11
- 239000011435 rock Substances 0.000 claims abstract description 81
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 239000004744 fabric Substances 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 33
- 239000012530 fluid Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 8
- 239000012528 membrane Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 210000002445 nipple Anatomy 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 12
- 230000035699 permeability Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- -1 sandpack column) Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/007—Measuring stresses in a pipe string or casing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/008—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a kind of apparatus and method for evaluating capillary force during reservoir water, the capillary force on stratum during actual reservoir waterflooding can be simulated.One gum cover is set in the cylinder of core holding unit;Taper sheath is in the end of gum cover;Seal pressure cap is connected through a screw thread with cylinder, fixed plug;Plug is connected through a screw thread with rock core plug, adjusts rock core length;The inner of rock core plug is in gum cover;For Thief zone metal partion (metp) between plug and rock core, its radius and tangential direction have circulation passage;Screen cloth is between the Thief zone metal partion (metp) and rock core plug of the port of export;The outer pipe nipple line anchor tip of rock core plug;Ring crimp head and cylinder external connection.The step of this method provide concrete operations experimental facilities and flow, and how to obtain capillary force and the curve of saturation degree.The present invention solves the influence that semi-permeable plate or semipermeable membrane are brought, while also reduces the influence of liquid effect of end surface so that experimental data is more accurately and reliably.
Description
Technical field
The invention belongs to oil-gas field development laboratory experiment technical field;A kind of in particular it relates to evaluation reservoir water process
The apparatus and method of middle capillary force.
Background technology
Capillary force is capillary pressure, refers to add present on two kinds of immiscible fluid curved interfaces in capillary
Pressure.In oilfield explorating developing process, many properties such as rock pore structure, rock storage and collection performance, the profit of oil reservoir are satisfied
Relation, oil displacement efficiency, the wetability of reservoir rock between degree and water to oil area height etc., are required for using capillary force data
To determine.Therefore, it is to carry out the premise of oil and gas exploration and development accurately and effectively to obtain capillary force data.
The most frequently used method of measurement capillary force mainly has three kinds:Mercury injection method, centrifugal process and semi-permeable plate method.Mercury injection method is surveyed
Examination speed is fast, and measurement range is big, but larger with oil reservoir actual conditions difference, pollutes environment, and rock core can not be reused.Centrifugal process
Test equipment is more complicated with calculating, and measurement range is limited, and maximum pressure only has 1.4MPa.Semi-permeable plate method and reservoir condition
Close, measurement accuracy is high, but can influence fluid distrbution in rock core.These methods, apply it is determined that hair during reservoir water
During pipe power, Railway Project be present:(1) fluid-flow mode in test process under the type of flow of fluid and formation condition is not
Together, such as most accurate semi-permeable plate method enters high-pressure fluid using one end, and other end closing oil phase can not flow out rock core.When
After oil phase reaches hydrophobicity semi-permeable plate, just start to assemble at semi-permeable plate surface and in rock core, cause in rock core
Aqueous phase and rock core outside aqueous phase be disconnected connection.It is obvious that semi-permeable plate can significantly affect the liquid distribution in rock core, no
Stratum condition and parameter can more really be reacted;(2) these methods can not test capillary force under reservoir conditions, therefore measure
There is some difference under capillary force and oil reservoir truth;(3) corresponding with various method of testings test oil reservoir capillary force
Equipment is also a lot, but the capillary force being all unable in actual response and accurate evaluation the injecting process.Such as dynamic hollow billet force test device,
Usual test object is quartz sand or soil (i.e. sandpack column), and pore permeability is all very high, can not formation testing or people
Make the dynamic capillary force of flow in low permeability core
The content of the invention
The invention provides a kind of apparatus and method of capillary force during evaluation reservoir water, underground fluid is specially tested
During flow regime, corresponding capillary force.Experimental facilities is simple to operate, with strong points, can be tested under reservoir conditions,
Capillary force test and evaluation can be carried out to hyposmosis core, while decrease the error that existing experimental facilities is brought.
The invention provides a kind of equipment of capillary force during evaluation reservoir water, including displacement pump, intermediate receptacle, pressure
Power table, core holding unit, metering device and baking oven.
Displacement pump, for adjusting different displacement pressures, the liquid in intermediate receptacle is driven according to no displacement pressure
For into rock core.Core holding unit is by cylinder, seal pressure cap, plug, rock core plug, screen cloth, taper sheath, gum cover, Thief zone metal
Dividing plate, ring crimp head, pipeline anchor tip, screen cloth and baking oven composition.One gum cover, gum cover are set in the cylinder of core holding unit
Inside it is put into tested rock core.A taper sheath is connected in the end of gum cover, to fix gum cover and sealing ring pressure.Cylinder and seal pressure cap
Be connected through a screw thread, seal pressure cap fixed plug, plug is connected through a screw thread with rock core plug, rock core plug the inner in gum cover,
A Thief zone metal partion (metp) is separated between rock core, between the Thief zone metal partion (metp) and rock core plug of the port of export, also one
Individual screen cloth, prevent from shaking out in the injecting process.Ring crimp head and cylinder external connection, connect in the centre bore and cylinder of ring crimp head
Logical, outer end is connected with confined pressure pump, applies confined pressure to core holding unit by confined pressure pump.The core holding unit left and right ends are symmetrical,
But the more screen clothes of the port of export.Rock core length can be adjusted by the screw thread between rock core plug and plug.Pipeline is fixed
Joint seals pipeline in the outer end of rock core plug, allows liquid to be flowed out from pipeline.There are a baking oven, rise temperature outside core holding unit
Spend to reservoir temperature.
Thief zone metal partion (metp) is between rock core and rock core plug, has circulation logical in its radial direction and tangential direction
Road, so as to which the liquid for allowing access into or flowing out can be uniformly distributed in dividing plate.Thief zone metal partion (metp) absolute permeability compares rock
Heart absolute permeability is much higher.Thief zone metal partion (metp) replaces semi-permeable plate or semipermeable membrane, solve semi-permeable plate or
The influence that semipermeable membrane is brought.Because the metal partion (metp) permeability is very high, in order to prevent shaking out, screen cloth is fixed on the port of export
After metal partion (metp).
Further, the invention provides a kind of method of capillary force during evaluation reservoir water, comprise the following steps:
Step 1, rock core is drilled through from scene;
Step 2, rock core is cleaned, recovers core wetability and establishes original water saturation;
Step 3, rock core is loaded into core holding unit, i.e. removal of core plug 4, screen cloth 10 and Thief zone metal partion (metp) 7, by rock
The heart is put into clamper, is sequentially placed into Thief zone metal partion (metp) 7, screen cloth 10 and rock core plug 4.Raise confined pressure, increasing inlet
And back pressure, Fluid pressure in back pressure suffered by rock core and rock core is reached reservoir condition;Open baking oven 11 and raise temperature to oil reservoir temperature
Degree;Step 4, increase the displacement pressure of displacement pump step by step, by water drive for rock core is entered, long enough is kept under each displacement pressure
Time, until oil can not by displacement come out untill;Then pressure is applied under next displacement pressure, until oil can not be driven
Untill out;Pressurization stops when the oil in rock core is residual oil state.It is recorded in meter under each displacement pressure
Oil pump capacity, calculate corresponding water saturation, be depicted as the curve of saturation degree and displacement pressure, be i.e. capillary force and saturation degree
Curve.In displacement process, experimental provision can consume substantial amounts of water, need to recycle water.
Beneficial effects of the present invention:
Thief zone metal partion (metp) and screen cloth in core holding unit of the present invention, can specially test underground fluid flow regime
When, corresponding capillary force.Experimental facilities is simple to operate, with strong points, can be tested under reservoir conditions, can also be to low
Permeate core and carry out capillary force test and evaluation, while solve the influence that semi-permeable plate or semipermeable membrane are brought, also weaken
The influence of liquid effect of end surface, substantially eliminating the error that existing experimental facilities is brought.
Brief description of the drawings
Fig. 1 is core holding unit structural profile illustration of the present invention;
Fig. 2 is Thief zone metal partion (metp) structural profile illustration of the present invention;
Fig. 3 is experimental provision structural representation of the present invention.
In figure, 1- cylinders, 2- seal pressure caps, 3- plugs, 4- rock core plugs, 5- taper sheaths, 6- gum covers, 7- Thief zones metal every
Plate, 8- ring crimp heads, 9- pipeline anchor tips, 10- screen clothes, 11- baking ovens.
Embodiment
With reference to the accompanying drawings and detailed description, the present invention is described in further details.
As shown in figure 1, core holding unit is by cylinder 1, seal pressure cap 2, plug 3, rock core plug 4, taper sheath 5, gum cover 6, height
Percolated metal dividing plate 7, ring crimp head 8, pipeline anchor tip 9, screen cloth 10 and baking oven 11 form.
There is a gum cover 6 in cylinder 1, tested rock core can be put into gum cover 6.Outside retainer ring crimp head 8 and cylinder 1
Connection, the centre bore of ring crimp head 8 connect with the inside of cylinder 1, and the top of ring crimp head 8 can be with connecting pipeline, pipeline and confined pressure pump
Connection, confined pressure can be applied to rock core by confined pressure pump.
Core holding unit left and right ends are symmetrical, but the more screen clothes 10 of the port of export.A cone is connected in the end of gum cover 6
Shape set 5, to fix gum cover 6 and sealing ring pressure.The both ends of cylinder 1 are connected through a screw thread with seal pressure cap 2, with fixed plug 3.Plug
3 are connected through a screw thread with rock core plug 4, and the length of rock core can be adjusted by the screw thread between plug 3 and rock core plug 4.Rock core
The inner of plug 4 is in gum cover 6, by confined pressure to seal rock core.Thief zone metal partion (metp) 7 is between rock core plug 4 and rock core, screen cloth
10 between the metal partion (metp) 7 and rock core plug 4 of the port of export.Pipeline anchor tip 9 seals pipeline in the outer end of rock core plug 4, allows liquid
Body flows out from pipeline.There are a baking oven 11, rise temperature to reservoir condition outside core holding unit.
As shown in Fig. 2 Thief zone metal partion (metp) 7 is made of stainless steel material.The thickness of Thief zone metal partion (metp) 7 is
3mm, channel diameter 2-3mm, there is circulation passage in radial direction and tangential direction, runner 2-4mm is wide, to allow access into or flow
The liquid gone out can be uniformly distributed in dividing plate, reduce the influence etc. of effect of end surface.The absolute permeability of Thief zone metal partion (metp) 7
It is more much higher than rock core absolute permeability.After the Thief zone metal partion (metp) 7 of the port of export, screen cloth 10, fixed sand grains are added.
Specific implementation step is as follows:
(1) rock core is made:Rock sample is obtained at the scene, then drills through the rock core for meeting requirement of experiment;
(2) clean and dry rock core:Rock core is cleaned with water and petroleum ether, then dries rock core with baking box;
(3) recover core wettability and establish initial oil water saturation:First by the fully saturated water of rock core, then rock core satisfied
And oil, until constraint water state;
(4) rock core is installed:Removal of core plug 4, screen cloth 10 and Thief zone metal partion (metp) 7, rock core is put into clamper, according to
It is secondary to be put into Thief zone metal partion (metp) 7, screen cloth 10 and rock core plug 4.The screw thread between rock core plug 4 and plug 3 is adjusted, is located at rock core
The middle part of core holding unit;
(5) equipment is adjusted and checked, confined pressure is added by confined pressure pump, back pressure is controlled by back-pressure valve, makes back pressure suffered by rock core
Reach reservoir condition with Fluid pressure in rock core;
(6) baking oven 11, rise temperature to reservoir temperature are opened;
(7) rock core displacement test:Increase the displacement pressure of displacement pump step by step, by water drive for rock core is entered, in each displacement
The sufficiently long time is kept under pressure, untill oil can not be come out by displacement;Then pressure is applied under next displacement pressure
Power, untill oil can not be come out by displacement;The oil being eventually until in rock core comes out (constraint water state) by complete displacement.Use tricks
Measuring device is recorded in the oil pump capacity under each displacement pressure, calculates corresponding water saturation, is depicted as saturation degree and displacement pressure
Curve, i.e. capillary force and saturation degree curve.Rock core displacement test is carried out again, is repeated the above steps, you can is obtained multigroup
Experimental data.
Claims (3)
1. it is a kind of evaluate reservoir water during capillary force apparatus and method, it is characterised in that core holding unit by cylinder 1,
Seal pressure cap 2, plug 3, rock core plug 4, taper sheath 5, gum cover 6, Thief zone metal partion (metp) 7, ring crimp head 8, pipeline anchor tip
9th, screen cloth 10 and baking oven 11 form.
2. the apparatus and method of capillary force during a kind of evaluation reservoir water as claimed in claim 1, it is characterised in that high
Percolated metal dividing plate 7 is made of stainless steel material;The thickness of Thief zone metal partion (metp) 7 is 3mm, channel diameter 2-3mm, half
Footpath direction and tangential direction have a circulation passage, and runner 2-4mm is wide.
3. the apparatus and method of capillary force during a kind of evaluation reservoir water as claimed in claim 1, it is characterised in that bag
Include following steps:
Step 1, rock core is drilled through from scene;
Step 2, rock core is cleaned, recovers core wetability and establishes original water saturation;
Step 3, rock core is loaded into core holding unit, i.e. removal of core plug 4, screen cloth 10 and Thief zone metal partion (metp) 7, rock core is put
Enter in clamper, be sequentially placed into Thief zone metal partion (metp) 7, screen cloth 10 and rock core plug 4.Raise confined pressure, increasing inlet and return
Pressure, makes Fluid pressure in back pressure suffered by rock core and rock core reach reservoir condition;Temperature is raised to reservoir temperature;
Step 4, increase the displacement pressure of displacement pump step by step, by water drive for rock core is entered, keep enough under each displacement pressure
The long time, untill oil can not be come out by displacement;Then pressure is applied under next displacement pressure, until oil can not be by
Untill displacement comes out;Pressurization stops when the oil in rock core is residual oil state.Each displacement pressure is recorded in meter
Under oil pump capacity, calculate corresponding water saturation, be depicted as the curve of saturation degree and displacement pressure, i.e. capillary force and saturation degree
Curve.In displacement process, experimental provision can consume substantial amounts of water, need to recycle water.
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CN201710965248.5A CN107725046A (en) | 2017-10-17 | 2017-10-17 | The apparatus and method of capillary force during a kind of evaluation reservoir water |
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CN201710965248.5A CN107725046A (en) | 2017-10-17 | 2017-10-17 | The apparatus and method of capillary force during a kind of evaluation reservoir water |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111021976A (en) * | 2019-12-27 | 2020-04-17 | 西南石油大学 | Low-permeability water-invasion gas reservoir failure development high-temperature high-pressure physical simulation experiment device and method |
CN111141889A (en) * | 2018-11-05 | 2020-05-12 | 安徽恩蔓智能科技有限公司 | Intelligent water injection instrument |
CN112179826A (en) * | 2020-09-14 | 2021-01-05 | 中国石油大学(华东) | Device for measuring dynamic capillary force of high-temperature and high-pressure rock core based on time domain reflection technology and experimental method |
CN112630124A (en) * | 2020-12-17 | 2021-04-09 | 中国石油大学(北京) | High-temperature-resistant rock core holder and rock core pulse attenuation gas permeability test system thereof |
CN113029898A (en) * | 2021-02-22 | 2021-06-25 | 西南石油大学 | Device and method for testing dynamic flow conductivity of crack and gas supply capacity of bedrock |
CN113074862A (en) * | 2021-03-05 | 2021-07-06 | 中国地质大学(北京) | Porous medium capillary pressure measuring device and method containing gas hydrate |
CN114965579A (en) * | 2021-02-24 | 2022-08-30 | 中国石油化工股份有限公司 | Oil, gas and water three-phase fluid saturation calibration test device and method |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111141889A (en) * | 2018-11-05 | 2020-05-12 | 安徽恩蔓智能科技有限公司 | Intelligent water injection instrument |
CN111021976A (en) * | 2019-12-27 | 2020-04-17 | 西南石油大学 | Low-permeability water-invasion gas reservoir failure development high-temperature high-pressure physical simulation experiment device and method |
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CN112179826A (en) * | 2020-09-14 | 2021-01-05 | 中国石油大学(华东) | Device for measuring dynamic capillary force of high-temperature and high-pressure rock core based on time domain reflection technology and experimental method |
CN112630124A (en) * | 2020-12-17 | 2021-04-09 | 中国石油大学(北京) | High-temperature-resistant rock core holder and rock core pulse attenuation gas permeability test system thereof |
CN113029898A (en) * | 2021-02-22 | 2021-06-25 | 西南石油大学 | Device and method for testing dynamic flow conductivity of crack and gas supply capacity of bedrock |
CN113029898B (en) * | 2021-02-22 | 2022-04-15 | 西南石油大学 | Device and method for testing dynamic flow conductivity of crack and gas supply capacity of bedrock |
CN114965579A (en) * | 2021-02-24 | 2022-08-30 | 中国石油化工股份有限公司 | Oil, gas and water three-phase fluid saturation calibration test device and method |
CN113074862A (en) * | 2021-03-05 | 2021-07-06 | 中国地质大学(北京) | Porous medium capillary pressure measuring device and method containing gas hydrate |
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