CN106770415B - A kind of evaluation method of microcosmic flowability of the fine and close oil of the low mobility of high viscosity under different Temperature-pressure Conditions - Google Patents

A kind of evaluation method of microcosmic flowability of the fine and close oil of the low mobility of high viscosity under different Temperature-pressure Conditions Download PDF

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CN106770415B
CN106770415B CN201611145372.9A CN201611145372A CN106770415B CN 106770415 B CN106770415 B CN 106770415B CN 201611145372 A CN201611145372 A CN 201611145372A CN 106770415 B CN106770415 B CN 106770415B
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pressure
temperature
oil
evaluation
magnetic resonance
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CN106770415A (en
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闫林
陈福利
王少军
冉启全
刘国良
袁江如
董家辛
袁大伟
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中国石油天然气股份有限公司
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N24/00Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
    • G01N24/08Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
    • G01N24/081Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/30Assessment of water resources

Abstract

The present invention provides a kind of evaluation methods of microcosmic flowability of the fine and close oil of the low mobility of high viscosity under different Temperature-pressure Conditions.T2 spectrum of this method by test sample in varied situations, binding analysis evaluation obtain microcosmic flowability situation of the fine and close oil of the low mobility of high viscosity under different Temperature-pressure Conditions.Using the evaluation method can comprehensively, system, reliably microcosmic flowable characteristic under the different Temperature-pressure Conditions of the fine and close oil of the low mobility of understanding high viscosity.

Description

A kind of microcosmic flowability of the fine and close oil of the low mobility of high viscosity under different Temperature-pressure Conditions Evaluation method
Technical field
It is the present invention relates to the investigative technique of the fine and close oil property employed in unconventional fine and close oil exploitation, in particular to a kind of high The evaluation method of microcosmic flowability of the fine and close oil of the low mobility of viscosity under different Temperature-pressure Conditions, belongs to oil exploitation technology neck Domain.
Background technique
Present Global has entered unconventional oil and gas and has developed the fast-developing epoch, and it is that the nearest whole world most induces one that fine and close oil, which has become, The non-conventional oil resource gazed at, especially using North America as the oily development field of densification of Typical Representative obtain in recent years significantly into Exhibition, has been achieved with commercial mining by " horizontal well+volume fracturing+batch production " mode, makes U.S.'s oil gas external dependence degree substantially Decline.Chinese fine and close oil is resourceful, multiple hundred million tonnes of scale reserves areas is found in basins such as Erdos, Zhunger Basins, in pine Also there is important breakthrough in the basins such as the Liao Dynasty, Bohai Sea Gulf, Sichuan.China's densification oil belongs to the fine and close oil of terrestrial facies, with the fine and close oily phase of North America marine facies Than, there is the distinguishing feature that viscosity of crude is big, gas-oil ratio is low, mobility is small, cause under different temperature, pressure condition, it is fine and close There are notable difference, under conventional normal temperature and pressure, nuclear magnetic resonance is tested determines that microfluid can flow for oily occurrence status and the property employed The method of dynamic property can not reliably evaluate the property employed of the fine and close oil of the low mobility of high viscosity comprehensively.
Reliable evaluation comprehensively is carried out to the microcosmic flowability of the fine and close oil of the low mobility of China's high viscosity, specifies such very The property employed for advising petroleum resources is of great significance for formulating the fine and close oily development technique countermeasure of the low mobility of high viscosity, domestic It there is no microcosmic flowability evaluation method under the different Temperature-pressure Conditions of the fine and close oil of the low mobility of high viscosity at present outside.Conventional oil gas is microcosmic The moveable gel that flowability evaluation is mainly determined according to nuclear magnetic resonance test method under normal temperature and pressure conditions, routine side The advantages of method is can quickly to carry out the evaluation of the oil-gas reservoir property employed, and has substantially met conventional oil gas reservoir and has movably evaluated demand with property, But not only reservoir is fine and close for unconventional fine and close oil, fluid occurrence status multiplicity, and with the fine and close oil of North America marine facies and routine oil reservoir phase Mobility lower than its high viscosity is with conspicuous characteristics, and flowability significant difference under different Temperature-pressure Conditions can not be ignored, therefore conventional nuclear-magnetism Test method can not comprehensively, system, reliably microcosmic flowable spy under the different Temperature-pressure Conditions of the fine and close oil of the low mobility of understanding high viscosity Property.
Therefore it provides microcosmic flowability evaluation method under a kind of different Temperature-pressure Conditions of the fine and close oil of the low mobility of high viscosity, bright Really microcosmic flowable characteristic under the different Temperature-pressure Conditions of the fine and close oil of the low mobility of high viscosity, for formulating the oily development technique countermeasure tool of densification It is of great importance, there is no microcosmic flowability evaluation side under the different Temperature-pressure Conditions of the fine and close oil of the low mobility of high viscosity at present both at home and abroad Method.
Summary of the invention
In order to solve the above-mentioned technical problem, the purpose of the present invention is to provide a kind of the microcosmic of the fine and close oil of the low mobility of high viscosity The evaluation method of flowability, using the evaluation method can comprehensively, system, reliably the fine and close oil of the low mobility of understanding high viscosity is not With flowable characteristic microcosmic under Temperature-pressure Conditions.
In order to achieve the above object, the present invention provides a kind of fine and close oil of the low mobility of high viscosity under different Temperature-pressure Conditions The evaluation method of microcosmic flowability.This method comprises:
Step A: reservoir rock sample is chosen, standard sample is prepared into, is numbered, weighs, calculating apparent volume, and adopting With high temperature and pressure nuclear magnetic resonance core analysis device test reset condition T2 spectrum;
Step B: carrying out washing oil, drying to the reservoir rock sample, surveys method using gas and measures porosity and permeability, and Using high temperature and pressure nuclear magnetic resonance core analysis device test oven-dried condition T2 spectrum;
Step C: simulated formation water is prepared, the reservoir rock sample is vacuumized into rear saturation simulation water flooding, and use High temperature and pressure nuclear magnetic resonance core analysis device tests water-saturated state T2 spectrum;
Step D: the reservoir rock sample of full water is centrifuged under the conditions of different centrifugal force, and total using high temperature and pressure nuclear-magnetism The core analysis device that shakes is tested T2 under different centrifugal conditions and is composed;
Step E: it will be dried by the reservoir rock sample of step D test, saturation simulation water flooding, using viscosity and reality The comparable fluorocarbon oil expelling water of crude oil makes irreducible water, and using high temperature and pressure nuclear magnetic resonance core analysis device test constraint water state T2 Spectrum;
Step F: the reservoir rock sample is increased into ring with appropriate pressure intervals and is depressed into compact oil reservoir original formation pressure State, and composed using T2 under the conditions of high temperature and pressure nuclear magnetic resonance core analysis device test different pressures;
Step G: after ring pressure is stablized, the reservoir rock sample heated with proper temperature interval original to compact oil reservoir Formation temperature state, and composed using T2 under high temperature and pressure nuclear magnetic resonance core analysis device test condition of different temperatures;
Step H: under compact oil reservoir original formation pressure, formation temperature conditions, water is carried out to the reservoir rock sample Fluorocarbon oil is driven to remaining oil condition, and tests the T2 spectrum of remaining oil condition using high temperature and pressure nuclear magnetic resonance core analysis device;
Step I: carrying out high-pressure mercury test for the reservoir rock sample, to obtain the quarter between T2 spectrum and high-pressure mercury Spend the factor;
Step J: T2 spectrum of the reservoir rock sample under different temperatures, pressure condition is analyzed and evaluated, to obtain Under different condition, different existence state amount of fluid and the distribution in different venturis control pore volume.
In above-mentioned evaluation method, it is preferable that the reservoir rock sample of the selection is the fine and close oily area of the low mobility of high viscosity Block oil-producing interval sample.
In above-mentioned evaluation method, it is preferable that the standard sample is the plunger sample of diameter 2.5cm, length 5cm.
In above-mentioned evaluation method, it is preferable that the high temperature and pressure nuclear magnetic resonance core analysis device is to increase to have matched high temperature The device for carrying out nuclear magnetic resonance test under high-temperature and high-pressure conditions of high pressure clamper and temp.-increasing heating device, 120 DEG C of maximum temperature, Maximum pressure 50MPa.It is highly preferred that temp.-increasing heating device is connected with high-temperature high-pressure clamp, the high-temperature high-pressure clamp and core Magnetism test equipment is connected.
In above-mentioned evaluation method, it is preferable that in step D, centrifugal condition 150psi, 300psi, 450psi, 600psi。
In above-mentioned evaluation method, it is preferable that in step E, practical crude oil is 30-400mPas in 50 DEG C of viscosity, The viscosity of used fluorocarbon oil is 30-400mPas.
In above-mentioned evaluation method, it is preferable that in step F, the pressure intervals are 5MPa.
In above-mentioned evaluation method, it is preferable that in step G, the temperature interval is 5 DEG C.
In above-mentioned evaluation method, it is preferable that in step J, assay includes to reservoir rock sample in not equality of temperature T2 cutoff value, moveable gel, constraint fluid saturation and the movable fluid saturation of T2 spectrum under degree, pressure condition Degree and throat distribution relationship is analyzed and evaluated.
Utilize the evaluation side of the microcosmic flowability of the fine and close oil of the low mobility of high viscosity of the invention under different Temperature-pressure Conditions Method can comprehensively, system, reliably microcosmic flowable characteristic under the different Temperature-pressure Conditions of the fine and close oil of the low mobility of understanding high viscosity, and it is normal The microcosmic flowability method of fluid is evaluated by nuclear magnetic resonance test method under rule normal temperature and pressure conditions to compare, it is low to high viscosity The mobility densification oil property employed evaluating characteristics are more fully reliable, more can be from the low fine and close oil of mobility of profound level understanding high viscosity not With the difference of flowability under Temperature-pressure Conditions, it is of great significance for formulating such fine and close oily development technique countermeasure.
Detailed description of the invention
Fig. 1 is the evaluation of microcosmic flowability of the fine and close oil of the low mobility of high viscosity of embodiment 1 under different Temperature-pressure Conditions The flow chart of method;
Fig. 2 is original to be tested using high temperature and pressure nuclear magnetic resonance core analysis device reservoir rock sample State T2 spectrum and oven-dried condition T2 spectrum;
Fig. 3 is the full water tested using high temperature and pressure nuclear magnetic resonance core analysis device reservoir rock sample State T2 spectrum, and the T2 spectrum measured under the conditions of 150psi, 300psi, 450psi, 600psi centrifugal force respectively;
Fig. 4 is the full water tested using high temperature and pressure nuclear magnetic resonance core analysis device reservoir rock sample State T2 spectrum and constraint water state T2 spectrum;
Fig. 5 is to increase ring with 5MPa pressure intervals to be depressed into compact oil reservoir original formation pressure state, and use high temperature and pressure T2 is composed under the conditions of the different pressures that nuclear magnetic resonance core analysis device tests reservoir rock sample;
Fig. 6 is to be heated with 15 DEG C of temperature intervals to compact oil reservoir prime stratum state of temperature, and use after ring pressure is stablized T2 is composed under the condition of different temperatures that high temperature and pressure nuclear magnetic resonance core analysis device tests reservoir rock sample;
Fig. 7 is to carry out water drive fluorocarbon oil to reservoir rock sample under compact oil reservoir original formation pressure, formation temperature conditions To remaining oil condition, and tested using high temperature and pressure nuclear magnetic resonance core analysis device different displacement degree when remaining oil The T2 of state is composed;
Fig. 8 be to reservoir rock sample carry out high-pressure mercury test, acquisition T2 spectrum high-pressure mercury between scale because Sub- C;
Fig. 9 A and Fig. 9 B control hole for the moveable oil ratio under normal temperature and pressure and oil reservoir Temperature-pressure Conditions and in different venturis Distribution map in volume.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
Embodiment 1
Present embodiments provide a kind of microcosmic flowability of the fine and close oil of the low mobility of high viscosity under different Temperature-pressure Conditions Evaluation method is the Junggar Basin Jimusaer Sag reed grass ditch group for having the characteristics that typical " the low mobility of high viscosity " to China Fine and close oil microfluid flowability under different Temperature-pressure Conditions is evaluated, and process is as shown in Figure 1, specifically include following step It is rapid:
S101: 4 pieces of reservoir rock samples are chosen, are prepared into standard sample (diameter 2.5cm, length 5cm plunger for first piece Sample), number J1, weighing results 105.09g, calculating apparent volume are 46.56mL, using high temperature and pressure nuclear magnetic resonance rock core point Analysis apparatus tests reset condition T2 spectrum, as shown in Figure 2;
S102: carrying out washing oil, drying to J1 sample, uses gas to survey method measurement porosity as 16.07%, permeability and is 0.24mD, using high temperature and pressure nuclear magnetic resonance core analysis device test oven-dried condition T2 spectrum, as shown in Fig. 2, reset condition T2 Compose, oven-dried condition T2 spectrum display motion space slightly reduction different smaller with oven-dried condition T2 spectral difference;
S103: preparation water type is NaHCO3Type, the simulated formation water that salinity is 35000g/mL, J1 sample is vacuumized Saturation simulation water flooding afterwards, and using high temperature and pressure nuclear magnetic resonance core analysis device test water-saturated state T2 spectrum, such as Fig. 3 institute Show;
S104: by the reservoir rock sample of full water under the conditions of 150psi, 300psi, 450psi, 600psi centrifugal force from The heart, and T2 under different centrifugal conditions is tested using high temperature and pressure nuclear magnetic resonance core analysis device and is composed, as shown in figure 3, by water of satisfying State starts, and with the increase of centrifugal force, water flooding is drained out in sample, and T2 spectrum display motion space gradually reduces, but Reduction amplitude increases with centrifugal force and is reduced, when 600psi when 450psi compared to change rate less than 3%, determine J1 sample saturation Moveable gel 51.83% under water flooding status condition;
S105: J1 sample is dried, saturation simulation water flooding, and using viscosity with practical crude oil, (50 DEG C of viscosity is 45mPa S) comparable fluorocarbon oil expelling water makes irreducible water, and using high temperature and pressure nuclear magnetic resonance core analysis device test constraint water state T2 Spectrum, as shown in Figure 4;
S106: increase ring with 5MPa pressure intervals and be depressed into compact oil reservoir original formation pressure state (35MPa), and using high Warm high pressure nuclear magnetic resonance core analysis device tests reservoir rock sample, obtain normal pressure, 5MPa, 10MPa, 15MPa, 20MPa, 25MPa, 30MPa, 35MPa T2 spectrum under the conditions of totally 8 kinds of ring pressures, as shown in figure 5, measurement result shows that fluid is flowable Property it is insensitive to pressure, confining pressure increases to 35MPa using 5MPa as interval from normal pressure, and T2 composes change rate less than 3%;
S107: after J1 sample loop pressure reaches reservoir formation reset pressure (35MPa) and stablizes, increased with 5 DEG C of temperature intervals Temperature is to compact oil reservoir prime stratum state of temperature (90 DEG C), and using high temperature and pressure nuclear magnetic resonance core analysis device test 30 DEG C, 45 DEG C, 60 DEG C, 75 DEG C, 90 DEG C T2 is composed under the conditions of totally 5 kinds of temperature, as shown in fig. 6, measurement result show it is high viscous in J1 sample It is extremely sensitive to temperature to spend the fine and close oily flowability of low mobility, temperature is that interval increases to 90 DEG C with 15 DEG C from 30 DEG C, and T2 spectrum is movable Space is in increase tendency, and 26.72% when mobile oil saturation is by 30 DEG C increases to 36.32% at 90 DEG C;
S108: it by J1 sample under the conditions of compact oil reservoir original formation pressure (35MPa), formation temperature (90 DEG C), carries out Water drive fluorocarbon oil tests using high temperature and pressure nuclear magnetic resonance core analysis device the T2 spectrum of remaining oil condition to remaining oil condition (Fig. 7), as shown in fig. 7, water drive fluorocarbon oil is carried out since being saturated oil condition with the speed of 0.02mL/min, with injected slurry volume number Increase, moveable oil is displaced successively in J1 sample, but the oil mass that unit volume injection water is displaced gradually decreases, in injection body After product reaches 11PV, the oil mass that unit volume injection water is displaced is significantly reduced, and after injected slurry volume reaches 21PV, injects water base The oil in sample can not be displaced again, and total oil mass that displacement goes out when injected slurry volume reaches 30PV accounts for the 35.3% of saturation oil mass;
S109: to reservoir rock sample carry out high-pressure mercury test, with obtain T2 spectrum high-pressure mercury between scale because Son;There are corresponding relationships by T2 relaxation time and pore radius r known to NMR relaxation theory, and J1 sample is carried out high pressure pressure Mercury test obtains the pore throat radius distribution of rock sample, as shown in figure 8, the mercury pressuring data and T2 modal data that are obtained by test determine T Calibration factor C between~r is 24.7, so as to quantitatively obtain the pore throat radius distribution of J1 sample using nuclear magnetic resonance T 2 spectrum;
S110: being analyzed and evaluated T2 spectrum under J1 sample different temperatures, pressure condition, obtains different under different condition assign Deposit state flow quantity and different venturis control pore volume in distribution, as shown in fig. 9 a and fig. 9b, temperature be 30 DEG C, When ring pressure is 0MPa, J1 sample moveable oil ratio under full oil condition is 26.72%, non-movable oil 73.28%, wherein radius 0.02~0.05 μm of venturi controls 6.52% moveable oil, 0.05~0.1 μm of radius of venturi control 6.8% it is movable The venturi of moveable oil, radius greater than 0.5 μm that oil, 0.1~0.5 μm of radius of venturi control 8.1% control 5.3% can Dynamic oil (Fig. 9 A), at oil reservoir Temperature-pressure Conditions (temperature is 90 DEG C, ring pressure is 35MPa), J1 sample moveable oil under full oil condition Ratio is 36.32%, non-movable oil 63.68%, wherein 0.02~0.05 μm of radius of venturi control 8.8% it is movable Oil, 0.05~0.1 μm of radius of venturi controls 9.4% moveable oil, 0.1-0.5 μm of radius of venturi controls 9.82% The venturi of moveable oil, radius greater than 0.5 μm controls 8.3% moveable oil (Fig. 9 B).Known to the test of above-mentioned J1 sample experiments pair In the fine and close oil of the low mobility of high viscosity, flowability is insensitive to pressure, extremely sensitive to temperature, movable under oil reservoir Temperature-pressure Conditions Oily ratio under normal temperature and pressure conditions compared with significantly increasing, and moveable oil has increase in different scale venturi control pore volume, but Scaling up is different.
Comparative example
For certain fine and close oily sample of the low mobility of Junggar Basin Permian System reed grass ditch group high viscosity, in conventional normal temperature and pressure item It is 26.4% that its moveable gel is measured under part.
Using the evaluation side of the microcosmic flowability of the fine and close oil of the low mobility of high viscosity of the invention under different Temperature-pressure Conditions Method is tested, confining pressure be 35MPa (oil reservoir original formation pressure) under the conditions of, when reservoir temperature be 30 DEG C, 45 DEG C, 60 DEG C, At 75 DEG C, 90 DEG C, measuring moveable gel is respectively 26.8%, 28.3%, 30.9%, 33.3%, 37.1%.
It can be seen from the above result that true moveable gel is conventional up to 37.1% under reservoir temperature and pressure condition 1.4 times of moveable gel value under normal temperature and pressure conditions, this calculates available reserves in such fine and close oil exploitation, opens Originating party formula selection etc. has important guiding effect.
Above embodiments explanation, can using microcosmic under different Temperature-pressure Conditions of the fine and close oil of the low mobility of high viscosity of the invention The evaluation method of mobility can comprehensively, system, it is reliably microcosmic under the different Temperature-pressure Conditions of the fine and close oil of the low mobility of understanding high viscosity can Flow behavior, compared with evaluating the microcosmic flowability method of fluid by nuclear magnetic resonance test method under conventional normal temperature and pressure conditions Compared with, it is more fully reliable to the low mobility densification oil property the employed evaluating characteristics of high viscosity, it more can be low from profound level understanding high viscosity The difference of the fine and close oil property employed under different Temperature-pressure Conditions of mobility has weight for formulating such fine and close oily development technique countermeasure Big meaning.

Claims (8)

1. a kind of evaluation method of microcosmic flowability of the fine and close oil of the low mobility of high viscosity under different Temperature-pressure Conditions, feature exist In, this method comprises:
Step A: choosing reservoir rock sample, be prepared into standard sample, is numbered, weighs, calculating apparent volume, and using high Warm high pressure nuclear magnetic resonance core analysis device test reset condition T2 spectrum;
The reservoir rock sample of selection is the low mobility densification oilfield oil-producing interval sample of high viscosity;
Step B: washing oil, drying are carried out to the reservoir rock sample, method is surveyed using gas and measures porosity and permeability, and is used High temperature and pressure nuclear magnetic resonance core analysis device tests oven-dried condition T2 spectrum;
Step C: preparing simulated formation water, the reservoir rock sample is vacuumized rear saturation simulation water flooding, and use high temperature High pressure nuclear magnetic resonance core analysis device tests water-saturated state T2 spectrum;
Step D: the reservoir rock sample of full water is centrifuged under the conditions of different centrifugal force, and uses high temperature and pressure nuclear magnetic resonance rock Heart analytical equipment is tested T2 under different centrifugal conditions and is composed;
Step E: it will be dried by the reservoir rock sample of step D test, saturation simulation water flooding, using viscosity and practical crude oil Comparable fluorocarbon oil expelling water makes irreducible water, and using high temperature and pressure nuclear magnetic resonance core analysis device test constraint water state T2 spectrum;
In step E, the practical crude oil is 30-400mPas in 50 DEG C of viscosity;
Step F: increasing ring for the reservoir rock sample with appropriate pressure intervals and be depressed into compact oil reservoir original formation pressure state, And it is composed using T2 under the conditions of high temperature and pressure nuclear magnetic resonance core analysis device test different pressures;
Step G: after ring pressure is stablized, the reservoir rock sample is heated to compact oil reservoir prime stratum with proper temperature interval State of temperature, and composed using T2 under high temperature and pressure nuclear magnetic resonance core analysis device test condition of different temperatures;
Step H: under compact oil reservoir original formation pressure, formation temperature conditions, water drive fluorine is carried out to the reservoir rock sample Oil tests using high temperature and pressure nuclear magnetic resonance core analysis device the T2 spectrum of remaining oil condition to remaining oil condition;
Step I: by the reservoir rock sample carry out high-pressure mercury test, with obtain T2 spectrum high-pressure mercury between scale because Son;
Step J: T2 spectrum of the reservoir rock sample under different temperatures, pressure condition is analyzed and evaluated, to obtain not With under the conditions of, different existence state amount of fluid and different venturis control pore volume in distribution.
2. evaluation method according to claim 1, which is characterized in that the standard sample is diameter 2.5cm, length 5cm Plunger sample.
3. evaluation method according to claim 1, which is characterized in that the high temperature and pressure nuclear magnetic resonance core analysis device To increase the device for carrying out nuclear magnetic resonance test under high-temperature and high-pressure conditions for having matched high-temperature high-pressure clamp and temp.-increasing heating device, most 120 DEG C of high-temperature, maximum pressure 50MPa.
4. evaluation method according to claim 3, which is characterized in that the temp.-increasing heating device and the high temperature and pressure clamp Device is connected, and the high-temperature high-pressure clamp is connected with nuclear-magnetism test equipment.
5. evaluation method according to claim 1, which is characterized in that in step D, centrifugal condition 150psi, 300psi、450psi、600psi。
6. evaluation method according to claim 1, which is characterized in that in step F, the pressure intervals are 5MPa.
7. evaluation method according to claim 1, which is characterized in that in step G, the temperature interval is 5 DEG C.
8. evaluation method according to claim 1, which is characterized in that in step J, the assay includes to described T2 cutoff value, the moveable gel, constraint saturated with fluid of T2 spectrum of the reservoir rock sample under different temperatures, pressure condition Degree and moveable gel are analyzed and evaluated with throat distribution relationship.
CN201611145372.9A 2016-12-13 2016-12-13 A kind of evaluation method of microcosmic flowability of the fine and close oil of the low mobility of high viscosity under different Temperature-pressure Conditions CN106770415B (en)

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CN108896598A (en) * 2018-04-17 2018-11-27 中国石油天然气股份有限公司 A kind of method and device of determining fine and close oil content
CN108827999B (en) * 2018-06-25 2021-03-19 成都北方石油勘探开发技术有限公司 Method for evaluating movable oil proportion and movable oil resource amount of low-pore-permeability sandstone reservoir

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