CN105203705A - Experimental device and testing method for reservoir damage caused by deposition of heavy components - Google Patents

Experimental device and testing method for reservoir damage caused by deposition of heavy components Download PDF

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Publication number
CN105203705A
CN105203705A CN201510578170.2A CN201510578170A CN105203705A CN 105203705 A CN105203705 A CN 105203705A CN 201510578170 A CN201510578170 A CN 201510578170A CN 105203705 A CN105203705 A CN 105203705A
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receptacle
pressure
reservoir
displacement
core
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CN201510578170.2A
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CN105203705B (en
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贾辉
袁辉
梁玉凯
曾玉斌
王佳伟
黄凯文
宋吉锋
李彦闯
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China National Offshore Oil Corp CNOOC
Zhanjiang Branch of China National Offshore Oil Corp
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China National Offshore Oil Corp CNOOC
Zhanjiang Branch of China National Offshore Oil Corp
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Abstract

The invention discloses an experimental device and a testing method for reservoir damage caused by deposition of heavy components. The experimental device comprises an intermediate container I, a rock core gripper and an intermediate container II which are sequentially connected through needle valves and are all arranged in a thermostat, wherein a constant-flux pump is connected to the intermediate container I through a pipeline; a pressure gauge I and the corresponding needle valve are arranged on the connecting pipeline; a confining pressure pump is connected to the rock core gripper through a pipeline; a pressure gauge II and the corresponding needle valve are arranged on the connecting pipeline; a high-pressure air source is connected to the intermediate container II through a pipeline; a pressure gauge III and a throttling valve are arranged on the connecting pipeline; a sampling opening is also formed in the intermediate container II; a sampler is connected to the sampling opening through the pipeline and the corresponding needle valve. According to the experimental device and the testing method, the aim of determining the damage degree and the rule of the deposition of the heavy components to a reservoir under temperature and pressure conditions of the reservoir is achieved; in addition, the influence of the temperature on test precision is avoided.

Description

A kind of heavy component deposition causes experimental provision and the method for testing of reservoir damage
Technical field
The present invention relates to experimental study and technical field of measurement and test in petroleum exploration and development process, particularly relate to experimental provision and method of testing that a kind of heavy component deposition causes reservoir damage.
Background technology
In oil development process, heavy component deposition is one of key factor causing reservoir damage, in order to remove or prevent heavy component to deposit the injury caused, the sedimentation mechanism of the research heavy component that need go deep into and rule.At present, heavy component deposition become domestic and international oil exploitation research in focus and difficult point, it causes the analog detection method of reservoir damage to mainly contain following two kinds: 1. in crude oil or lightweight oil, add heavy component powder, adopts the method for rock core displacement to measure the injury situation of heavy component deposition to reservoir; 2. adopt crude oil to carry out rock core displacement, simulated the cold damage situation of reservoir by the method reducing experimental temperature.Add heavy component solid phase powder in displacement fluid, only can illustrate that solid phase particles invades injury situation to reservoir, cannot the injury of heavy component deposition to reservoir in real simulation crude oil; Due to crude oil under the high temperature conditions constituent part to gasify volatilization, the cold damage situation of part low temperature reservoir only can be simulated by the method reducing experimental temperature, cannot the heavy component deposition injury situation to reservoir of Accurate Determining temperature reservoirs under reservoir temperature condition, and reservoir temperature reduces the cold damage situation caused.
In order to solve the defect that existing method of testing exists, can simulate under reservoir Temperature-pressure Conditions completely in the urgent need to one, in Accurate Determining crude oil, heavy component deposition causes the method for reservoir damage, thus realizes the object to reservoir permeability extent of injury and rule of heavy component deposition in accurate analysis oil development process.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides experimental provision and method of testing that a kind of heavy component deposition causes reservoir damage, under reservoir temperature, pressure condition, accurately can test heavy component deposition cause reservoir damage degree and rule.
The technical solution adopted in the present invention is: a kind of heavy component deposition causes the experimental provision of reservoir damage, comprise intermediate receptacle one, core holding unit, intermediate receptacle two, described intermediate receptacle one, core holding unit, intermediate receptacle two are connected by needle-valve successively and are all arranged in constant temperature oven, described intermediate receptacle one is connected with constant-flux pump by pipeline, and connecting tube is provided with tensimeter one and needle-valve; Described core holding unit is connected with ring press pump by pipeline, and connecting tube is provided with tensimeter two and needle-valve; Described intermediate receptacle two-way piping is connected with high-pressure air source, and connecting tube is provided with tensimeter three and throttling valve, and intermediate receptacle two is also provided with sample tap, and sample tap is connected with sampler by pipeline and needle-valve.
The technical scheme that method of testing of the present invention adopts is: a kind of heavy component deposition causes the method for testing of reservoir damage, comprises the following steps:
A () is got reservoir representative core and is carried out pre-service, and the parameters such as testing rock core factor of porosity ф, length L and cross-sectional area A;
B () gets corresponding reservoir crude oil, viscosity of crude μ i under survey experimental temperature Ti;
C crude oil is injected intermediate receptacle one by (), the air in emptying intermediate receptacle one;
D () uses the air in nitrogen purge intermediate receptacle two;
E rock core after step (a) process is put into core holding unit by ();
F () connects above-mentioned experimental provision;
G () adds ring pressure 2MPa by ring press pump to core holding unit, regulate throttling valve, and slowly to intermediate receptacle two supplementary pressure to make it to reach reservoir pressure, control loop pressure is all the time higher than the pressure 2MPa of intermediate receptacle two in the process;
H experimental temperature is risen to reservoir temperature by (), control in temperature-rise period intermediate receptacle two pressure and core holding unit ring pressure constant;
(i) set the flow Q of constant-flux pump i, open constant-flux pump and start displacement, control the ring pressure of core holding unit in displacement process all the time higher than displacement pressure 2MPa;
When () displacement fluid amount reaches 3 ~ 5 times of rock pore volumes j, sampler is connected on sample tap, the fluid in emptying intermediate receptacle two, metering fluid volume;
K () closes sample tap, start timing simultaneously, record displacement pressure differential deltap P 01,
L () continues displacement 2 times of volume of voids fluids, sample emptying intermediate receptacle two fluid, metering fluid volume V 0, close sample tap, stop timing simultaneously and record measurement time t 0, displacement pressure differential deltap P 02;
M () calculates rock core original permeability according to Darcy formula ;
N () continues to measure the situation of change of permeability Ki with mother oil displacement volume V according to j ~ l step;
O () draws the relation curve of core permeability and mother oil displacement volume.
As a preferred technical solution of the present invention, before every sub-sampling, all use the air in nitrogen purge sampler.
As a preferred technical solution of the present invention, the mensuration of crude oil volume is carried out at that same temperature.
As a preferred technical solution of the present invention, the core pretreatment of described step (a) comprises washing oil, oven dry, saturated local water.
Compared with prior art, the invention has the beneficial effects as follows: achieve under reservoir temperature, pressure condition, to measure the object of heavy component deposition to reservoir damage degree and rule, and measuring accuracy is by the impact of temperature.On the one hand, the present invention can to measure in production run heavy component deposition to the extent of injury of reservoir and rule by accurate simulation; On the other hand, because measuring accuracy is by the impact of temperature, the cold damage situation of reservoir can be measured by accurate simulation.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the one-piece construction schematic diagram of experimental provision of the present invention.
In figure: 1, ring press pump, 2, tensimeter two, 3, constant temperature oven, 4, core holding unit, 5, tensimeter three, 6, throttling valve, 7, high-pressure air source, 8, constant-flux pump, 9, tensimeter one, 10, intermediate receptacle one, 11, intermediate receptacle two, 12, sample tap, 13, sampler.
Embodiment
In order to more clearly understand technical scheme of the present invention, below in conjunction with accompanying drawing, the present invention is further described.
Embodiment one
As shown in Figure 1, a kind of heavy component deposition described in the present embodiment causes the experimental provision of reservoir damage, comprise intermediate receptacle 1, core holding unit 4, intermediate receptacle 2 11, described intermediate receptacle 1, core holding unit 4, intermediate receptacle 2 11 are connected by needle-valve successively and are all arranged in constant temperature oven 3, described intermediate receptacle 1 is connected with constant-flux pump 8 by pipeline, and connecting tube is provided with tensimeter 1 and needle-valve; Described core holding unit 4 is connected with ring press pump 1 by pipeline, and connecting tube is provided with tensimeter 22 and needle-valve; Described intermediate receptacle 2 11 is connected with high-pressure air source 7 by pipeline, and connecting tube is provided with tensimeter 35 and throttling valve 6, and intermediate receptacle 2 11 is also provided with sample tap 12, and sample tap 12 is connected with sampler 13 by pipeline and needle-valve.
A kind of heavy component deposition described in the present embodiment causes the method for testing of reservoir damage, comprises the following steps:
A () is got reservoir representative core and is carried out pre-service, and the parameters such as testing rock core factor of porosity ф, length L and cross-sectional area A;
B () gets corresponding reservoir crude oil, viscosity of crude μ i under survey experimental temperature Ti;
C crude oil is injected intermediate receptacle 1 by (), the air in emptying intermediate receptacle 1;
D () uses the air in nitrogen purge intermediate receptacle 2 11;
E rock core after step (a) process is put into core holding unit 4 by ();
F () connects experimental provision recited above;
G () adds ring pressure 2MPa to core holding unit 4 by ring press pump 1, regulate throttling valve 6, slowly to intermediate receptacle 2 11 supplementary pressure to make it to reach reservoir pressure, control loop pressure is all the time higher than the pressure 2MPa of intermediate receptacle 2 11 in the process;
H experimental temperature is risen to reservoir temperature by (), control in temperature-rise period intermediate receptacle 2 11 pressure and core holding unit 4 ring pressure constant;
(i) set the flow Q of constant-flux pump 8 i, open constant-flux pump 8 and start displacement, control the ring pressure of core holding unit 4 in displacement process all the time higher than displacement pressure 2MPa;
When () displacement fluid amount reaches 3 ~ 5 times of rock pore volumes j, sampler 13 is connected on sample tap 12, the fluid in emptying intermediate receptacle 2 11, metering fluid volume;
K () closes sample tap 12, start timing simultaneously, record displacement pressure differential deltap P 01,
L () continues displacement 2 times of volume of voids fluids, sample emptying intermediate receptacle 2 11 fluid, metering fluid volume V 0, close sample tap 12, stop timing simultaneously and record measurement time t 0, displacement pressure differential deltap P 02;
M () calculates rock core original permeability according to Darcy formula ;
N () continues to measure the situation of change of permeability Ki with mother oil displacement volume V according to j ~ l step;
O () draws the relation curve of core permeability and mother oil displacement volume.
Wherein, in the present embodiment, the air in 13 is all used in nitrogen purge sampler before every sub-sampling.
Wherein, in the present embodiment, the mensuration of crude oil volume is carried out at that same temperature.
Wherein, in the present embodiment, the core pretreatment of described step (a) comprises washing oil, oven dry, saturated local water.
Concrete operational instances 1
Get A oil field II oil group rock core, by rock core oil washing, oven dry, measuring rock core long is L, and cross-sectional area is A, and factor of porosity is ф, by saturated for rock core local water; Get this reservoir crude oil, survey reservoir temperature T 0lower viscosity of crude is μ 0; Crude oil is injected intermediate receptacle 1, with piston, crude oil and lower flow are isolated, open the air in displacement pump emptying receptacles; From the slow nitrogen injection in intermediate receptacle 2 11 top, air in emptying receptacles; Ready rock core is put into core holding unit 4; Experimental provision is connected: ring press pump 1 adds ring pressure 2MPa to core holding unit, regulates throttling valve, slowly to intermediate receptacle 1 supplementary pressure to make it to reach reservoir pressure P according to the schematic flow sheet in Fig. 1 0, control loop pressure is all the time higher than intermediate receptacle 2 11 pressure 2MPa in the process; Experimental temperature is risen to reservoir temperature T 0, the ring pressure controlling intermediate receptacle 2 11 pressure and core holding unit 4 in temperature-rise period is constant; Setting constant-flux pump 8 flow Q 0, open constant-flux pump 8 and start displacement, and start timing, in displacement process, control loop pressure is all the time higher than displacement pressure 2MPa; According to constant-flux pump flow Q 0and rock pore volume LA ф, calculate displacement one times of volume of voids time T ф=LA ф/Q 0; When Dose times reaches the T of 3 ~ 5 times фtime, sampler 13 is connected on sample tap 12, the fluid in emptying intermediate receptacle 2 11, metering fluid volume; Close sample tap 12, start timing simultaneously, record displacement pressure differential deltap P 01; Continue the T of displacement about 2 times ф, sample the fluid of emptying intermediate receptacle 2 11, metering fluid volume V 0, close sample tap 12, stop timing simultaneously and record measurement time t 0, displacement pressure differential deltap P 02; Rock core original permeability is calculated according to Darcy formula ; Continue displacement according to above-mentioned steps, can permeability K be obtained iwith the situation of change of mother oil displacement volume V; The test interval of permeability can be adjusted according to actual conditions in test process; Draw the relation curve of core permeability and mother oil displacement volume.
Thus, can Accurate Determining different reservoir condition, different displacement flows and core permeability when, heavy component deposition is to the extent of injury of reservoir and rule.
Concrete operational instances 2
According to concrete operational instances 1, measure rock core original permeability K 0after, reduce experimental temperature to T i, leave standstill or continue the T of displacement 5 ~ 30 times ф, measure permeability ; So just can measure the cold damage situation under reservoir different temperatures; After mensuration completes, return to the T that reservoir temperature continues displacement 5 ~ 30 times ф, measure the situation of change of permeability, the permeability impairment whether can removed reservoir cold damage and cause be described in production run thus.
Thus, can the cold damage degree of Accurate Determining reservoir and rule.
Set forth a lot of detail in description above so that fully understand the present invention, but the present invention can also adopt other to be different from other modes described here and implement, and therefore, can not be interpreted as limiting the scope of the invention.
In a word; those skilled in the art although the present invention illustrates above-mentioned preferred implementation, should illustrate, although can carry out various change and remodeling; unless such change and remodeling deviate from scope of the present invention, otherwise all should be included in protection scope of the present invention.

Claims (5)

1. a heavy component deposits the experimental provision causing reservoir damage, it is characterized in that: comprise intermediate receptacle one (10), core holding unit (4), intermediate receptacle two (11), described intermediate receptacle one (10), core holding unit (4), intermediate receptacle two (11) are connected by needle-valve successively and are all arranged in constant temperature oven (3), described intermediate receptacle one (10) is connected with constant-flux pump (8) by pipeline, and connecting tube is provided with tensimeter one (9) and needle-valve; Described core holding unit (4) is connected with ring press pump (1) by pipeline, and connecting tube is provided with tensimeter two (2) and needle-valve; Described intermediate receptacle two (11) is connected with high-pressure air source (7) by pipeline, connecting tube is provided with tensimeter three (5) and throttling valve (6), intermediate receptacle two (11) is also provided with sample tap (12), sample tap (12) is connected with sampler (13) by pipeline and needle-valve.
2. heavy component deposition causes a method of testing for reservoir damage, it is characterized in that: comprise the following steps:
A () is got reservoir representative core and is carried out pre-service, and the parameters such as testing rock core factor of porosity ф, length L and cross-sectional area A;
B () gets corresponding reservoir crude oil, viscosity of crude μ i under survey experimental temperature Ti;
C crude oil is injected intermediate receptacle one (10) by (), the air in emptying intermediate receptacle one (10);
D () uses the air in nitrogen purge intermediate receptacle two (11);
E rock core after step (a) process is put into core holding unit (4) by ();
F () connects the experimental provision described in claim 1;
G () adds ring pressure 2MPa by ring press pump (1) to core holding unit (4), regulate throttling valve (6), slowly to intermediate receptacle two (11) supplementary pressure to make it to reach reservoir pressure, control loop pressure is all the time higher than the pressure 2MPa of intermediate receptacle two (11) in the process;
H experimental temperature is risen to reservoir temperature by (), control in temperature-rise period intermediate receptacle two (11) pressure and core holding unit (4) ring pressure constant;
(i) set the flow Q of constant-flux pump (8) i, open constant-flux pump (8) and start displacement, control the ring pressure of core holding unit (4) in displacement process all the time higher than displacement pressure 2MPa;
When () displacement fluid amount reaches 3 ~ 5 times of rock pore volumes j, sampler (13) is connected on sample tap (12), the fluid in emptying intermediate receptacle two (11), metering fluid volume;
K () closes sample tap (12), start timing simultaneously, record displacement pressure differential deltap P 01,
L () continues displacement 2 times of volume of voids fluids, sample emptying intermediate receptacle two (11) fluid, metering fluid volume V 0, close sample tap (12), stop timing simultaneously and record measurement time t 0, displacement pressure differential deltap P 02;
M () calculates rock core original permeability according to Darcy formula ;
N () continues to measure the situation of change of permeability Ki with mother oil displacement volume V according to j ~ l step;
O () draws the relation curve of core permeability and mother oil displacement volume.
3. a kind of heavy component deposition according to claim 2 causes the method for testing of reservoir damage, it is characterized in that: all use the air in nitrogen purge sampler in (13) before every sub-sampling.
4. a kind of heavy component deposition according to claim 2 causes the method for testing of reservoir damage, it is characterized in that: the mensuration of crude oil volume is carried out at that same temperature.
5. a kind of heavy component deposition according to claim 2 causes the method for testing of reservoir damage, it is characterized in that: the core pretreatment of described step (a) comprises washing oil, oven dry, saturated local water.
CN201510578170.2A 2015-09-12 2015-09-12 A kind of heavy component deposition causes the method for testing of reservoir damage Active CN105203705B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106124377A (en) * 2016-06-16 2016-11-16 中海石油(中国)有限公司上海分公司 The experimental test procedures of gas reservoir reverse osmosis water suction lock damage evaluation under high-temperature and high-pressure conditions
WO2018010405A1 (en) * 2016-07-14 2018-01-18 西南石油大学 Shale block dynamic damage evaluation apparatus and method based on liquid pressure pulse
CN108225998A (en) * 2016-12-15 2018-06-29 中国石油化工股份有限公司 Acid stimulation analogue experiment method under 7 cm diameter rock core stratum temperature and pressure
CN110144240A (en) * 2019-04-27 2019-08-20 西南石油大学 A kind of device and method for water-in-oil emulsion demulsification

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1320731A (en) * 1969-06-18 1973-06-20 Svenska Entreprenad Sentab Arrangement at an installation in rock cavities for oil storage on heated water bed
CN102053055A (en) * 2010-12-03 2011-05-11 西南石油大学 High-temperature high-pressure multifunctional core sulfur deposition test device and method
CN102507414A (en) * 2011-11-22 2012-06-20 中国石油天然气股份有限公司 Core permeability experimental testing method and device under condition of stratum pressure
CN102900408A (en) * 2012-10-15 2013-01-30 西南石油大学 Experimental evaluation method of gas-injection displaceable oil of fracture-cave type carbonate reservoir

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1320731A (en) * 1969-06-18 1973-06-20 Svenska Entreprenad Sentab Arrangement at an installation in rock cavities for oil storage on heated water bed
CN102053055A (en) * 2010-12-03 2011-05-11 西南石油大学 High-temperature high-pressure multifunctional core sulfur deposition test device and method
CN102507414A (en) * 2011-11-22 2012-06-20 中国石油天然气股份有限公司 Core permeability experimental testing method and device under condition of stratum pressure
CN102900408A (en) * 2012-10-15 2013-01-30 西南石油大学 Experimental evaluation method of gas-injection displaceable oil of fracture-cave type carbonate reservoir

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106124377A (en) * 2016-06-16 2016-11-16 中海石油(中国)有限公司上海分公司 The experimental test procedures of gas reservoir reverse osmosis water suction lock damage evaluation under high-temperature and high-pressure conditions
CN106124377B (en) * 2016-06-16 2018-11-13 中海石油(中国)有限公司上海分公司 The experimental test procedures of gas reservoir reverse osmosis water suction lock damage evaluation under high-temperature and high-pressure conditions
WO2018010405A1 (en) * 2016-07-14 2018-01-18 西南石油大学 Shale block dynamic damage evaluation apparatus and method based on liquid pressure pulse
CN108225998A (en) * 2016-12-15 2018-06-29 中国石油化工股份有限公司 Acid stimulation analogue experiment method under 7 cm diameter rock core stratum temperature and pressure
CN110144240A (en) * 2019-04-27 2019-08-20 西南石油大学 A kind of device and method for water-in-oil emulsion demulsification

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