CN105203705B - A kind of heavy component deposition causes the method for testing of reservoir damage - Google Patents
A kind of heavy component deposition causes the method for testing of reservoir damage Download PDFInfo
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- CN105203705B CN105203705B CN201510578170.2A CN201510578170A CN105203705B CN 105203705 B CN105203705 B CN 105203705B CN 201510578170 A CN201510578170 A CN 201510578170A CN 105203705 B CN105203705 B CN 105203705B
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Abstract
The invention discloses experimental provision and method of testing that a kind of heavy component deposition causes reservoir damage, experimental provision includes intermediate receptacle one, core holding unit, intermediate receptacle two, intermediate receptacle one, core holding unit, intermediate receptacle two pass sequentially through needle-valve and connect and be arranged in insulating box, intermediate receptacle one is connected with constant-flux pump by pipeline, and connecting pipe is provided with pressure gauge one and needle-valve；Core holding unit is connected with ring press pump by pipeline, and connecting pipe is provided with pressure gauge two and needle-valve；Intermediate receptacle two-way piping is connected with high-pressure air source, and connecting pipe is provided with pressure gauge three and choke valve, and sample tap is additionally provided with intermediate receptacle two, and sample tap is connected with sampler by pipeline and needle-valve.The measure heavy component deposition under reservoir temperature, pressure condition is realized not to be influenced by temperature reservoir damage degree and the purpose of rule, and measuring accuracy.
Description
Technical field
The present invention relates to experimental study in petroleum exploration and development process and technical field of measurement and test, more particularly to a kind of heavy group
Deposition is divided to cause the experimental provision and method of testing of reservoir damage.
Background technology
During oil development, heavy component deposition is to cause one of the key factor of reservoir damage, in order to release or in advance
The injury that anti-heavy component deposition is caused, needs the sedimentation mechanism and rule of in-depth study heavy component.At present, heavy component sinks
Product has turned into focus and difficult point during domestic and international oil exploitation is studied, its cause reservoir damage analog detection method mainly have with
Lower two kinds：1. heavy component powder is added in crude oil or light oil, determining heavy component using the method for rock core displacement deposits
To the injury situation of reservoir；2. rock core displacement is carried out using crude oil, the cold of reservoir is simulated by reducing the method for experimental temperature
Injury situation.Heavy component solid phase powder is added in displacement fluid, can only illustrate that solid phase particles invade the injury feelings to reservoir
Condition, it is impossible to injury of the heavy component deposition to reservoir in true Simulation of Crude Oil；Due to crude oil constituent part meeting under the high temperature conditions
Gasification volatilization, the cold damage situation of analog portion low temperature reservoir is only capable of by the method for reducing experimental temperature, it is impossible to accurate to survey
Determine injury situation of heavy component deposition of the temperature reservoirs under the conditions of reservoir temperature to reservoir, and reservoir temperature reduction is caused
Cold damage situation.
In order to solve the defect that existing method of testing is present, in the urgent need to one kind can completely simulate reservoir Temperature-pressure Conditions
Under, the method that heavy component deposition causes reservoir damage in Accurate Determining crude oil, so as to realize accurately analyzing oil development process
Middle heavy component deposition is to reservoir permeability extent of injury and the purpose of rule.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, reservoir damage is caused the invention provides a kind of heavy component deposition
Experimental provision and method of testing, heavy component deposition can be accurately tested under reservoir temperature, pressure condition and 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, including
Intermediate receptacle one, core holding unit, intermediate receptacle two, described intermediate receptacle one, core holding unit, intermediate receptacle two lead to successively
Cross needle-valve to connect and be arranged in insulating box, described intermediate receptacle one is connected with constant-flux pump, connecting pipe by pipeline
It is provided with pressure gauge one and needle-valve；Described core holding unit is connected with ring press pump by pipeline, and connecting pipe is provided with pressure
Table two and needle-valve；Described intermediate receptacle two-way piping is connected with high-pressure air source, and connecting pipe is provided with pressure gauge three and section
Stream valve, is additionally provided with sample tap on intermediate receptacle two, sample tap is connected with sampler by pipeline and needle-valve.
The technical scheme that method of testing of the present invention is used for：A kind of heavy component deposition causes the survey of reservoir damage
Method for testing, comprises the following steps：
（a）Reservoir representative core is taken to be pre-processed, and the ginseng such as testing rock core porosity ф, length L and cross-sectional area A
Number；
（b）Corresponding reservoir crude oil is taken, viscosity of crude μ i under experimental temperature Ti are surveyed；
（c）Crude oil is injected into intermediate receptacle one, the air in emptying intermediate receptacle one；
（d）With the air in nitrogen purge intermediate receptacle two；
（e）By step（a）Rock core after treatment is put into core holding unit；
（f）The above-mentioned experimental provision of connection；
（g）Add ring to press 2MPa to core holding unit by ring press pump, adjust choke valve, slowly supplement pressure to intermediate receptacle two
Power makes up to reservoir pressure, and control ring pressure is consistently higher than the pressure 2MPa of intermediate receptacle two in the process；
（h）Experimental temperature is risen into reservoir temperature, the pressure of intermediate receptacle two and core holding unit ring are controlled in temperature-rise period
Pressure is constant；
（i）Set the flow Q of constant-flux pumpi, open constant-flux pump and start displacement, the ring of core holding unit is controlled in displacement process
Pressure is consistently higher than displacement pressure 2MPa；
（j）When displacement fluid amount reaches 3~5 times of rock pore volumes, sampler is connected on sample tap, in the middle of emptying
Fluid in container two, measures fluid volume；
（k）Sample tap is closed, timing, record displacement pressure differential deltap P is started simultaneously at01,
（l）Continue 2 times of pore volume fluids of displacement, the sampling emptying fluid of intermediate receptacle two, metering fluid volume V0, pass takes
Sample mouthful, while stopping timing and recording time of measuring t0, displacement pressure differential deltap P02；
（m）Rock core original permeability is calculated according to Darcy formula；
（n）Continue to determine situations of change of the permeability Ki with mother oil displacement volume V according to j~l steps；
（o）Draw the relation curve of core permeability and mother oil displacement volume.
As a preferred technical solution of the present invention, per sub-sampling before with the air in nitrogen purge sampler.
Used as a preferred technical solution of the present invention, the measure of crude oil volume is carried out at that same temperature.
As a preferred technical solution of the present invention, described step（a）Core pretreatment include washing oil, drying,
Saturation stratum water.
Compared with prior art, the beneficial effects of the invention are as follows：Realize and determine heavy under reservoir temperature, pressure condition
Component deposition is not influenced by temperature to reservoir damage degree and the purpose of rule, and measuring accuracy.On the one hand, the present invention can
Extent of injury and rule of the heavy component deposition to reservoir in accurate simulation measure production process；On the other hand, due to test essence
Degree is not influenced by temperature, and is capable of the cold damage situation of accurate simulation measure reservoir.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, embodiment will be described below needed for the accompanying drawing to be used
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, general for this area
For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the overall structure diagram of experimental provision of the present invention.
In figure：1st, ring press pump, 2, pressure gauge two, 3, insulating box, 4, core holding unit, 5, pressure gauge three, 6, choke valve, 7,
High-pressure air source, 8, constant-flux pump, 9, pressure gauge one, 10, intermediate receptacle one, 11, intermediate receptacle two, 12, sample tap, 13, sampler.
Specific embodiment
In order to be able to be more clearly understood that technical scheme, the present invention is further described below in conjunction with the accompanying drawings.
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, including in
Between container 1, core holding unit 4, intermediate receptacle 2 11, described intermediate receptacle 1, core holding unit 4, intermediate receptacle two
11 pass sequentially through needle-valve connects and is arranged in insulating box 3, and described intermediate receptacle 1 is connected with advection by pipeline
Pump 8, connecting pipe is provided with pressure gauge 1 and needle-valve；Described core holding unit 4 is connected with ring press pump 1 by pipeline, connection
Pipeline is provided with pressure gauge 22 and needle-valve；Described intermediate receptacle 2 11 is connected with high-pressure air source 7, connecting pipe by pipeline
Pressure gauge 35 and choke valve 6 are provided with, sample tap 12 is additionally provided with intermediate receptacle 2 11, sample tap 12 passes through pipeline and needle-valve
It is connected with sampler 13.
A kind of heavy component deposition described in the present embodiment causes the method for testing of reservoir damage, comprises the following steps：
（a）Reservoir representative core is taken to be pre-processed, and the ginseng such as testing rock core porosity ф, length L and cross-sectional area A
Number；
（b）Corresponding reservoir crude oil is taken, viscosity of crude μ i under experimental temperature Ti are surveyed；
（c）Crude oil is injected into intermediate receptacle 1, the air in emptying intermediate receptacle 1；
（d）With the air in nitrogen purge intermediate receptacle 2 11；
（e）By step（a）Rock core after treatment is put into core holding unit 4；
（f）Connect experimental provision recited above；
（g）2MPa is pressed to core holding unit 4 plus ring by ring press pump 1, choke valve 6 is adjusted, intermediate receptacle 2 11 is slowly given
Supplement pressure makes up to reservoir pressure, and control ring pressure is consistently higher than the pressure 2MPa of intermediate receptacle 2 11 in the process；
（h）Experimental temperature is risen into reservoir temperature, the pressure of intermediate receptacle 2 11 and core holding unit 4 are controlled in temperature-rise period
Ring pressure is constant；
（i）Set the flow Q of constant-flux pump 8i, open constant-flux pump 8 and start displacement, core holding unit 4 is controlled in displacement process
Ring pressure be consistently higher than displacement pressure 2MPa；
（j）When displacement fluid amount reaches 3~5 times of rock pore volumes, sampler 13 is connected on sample tap 12, emptied
Fluid in intermediate receptacle 2 11, measures fluid volume；
（k）Sample tap 12 is closed, timing, record displacement pressure differential deltap P is started simultaneously at01,
（l）Continue 2 times of pore volume fluids of displacement, the sampling emptying fluid of intermediate receptacle 2 11, metering fluid volume V0, close
Sample tap 12, while stopping timing and recording time of measuring t0, displacement pressure differential deltap P02；
（m）Rock core original permeability is calculated according to Darcy formula；
（n）Continue to determine situations of change of the permeability Ki with mother oil displacement volume V according to j~l steps；
（o）Draw the relation curve of core permeability and mother oil displacement volume.
Wherein, in the present embodiment, with the air in nitrogen purge sampler 13 before every sub-sampling.
Wherein, in the present embodiment, the measure of crude oil volume is carried out at that same temperature.
Wherein, in the present embodiment, described step（a）Core pretreatment include washing oil, drying, saturation stratum water.
Specific operational instances 1
The oil group rock core of A oil fields II is taken, by rock core oil washing, drying, a length of L of rock core is determined, cross-sectional area is A, and porosity is
ф, by rock core saturation stratum water；The reservoir crude oil is taken, reservoir temperature T is surveyed0Lower viscosity of crude is μ0；Crude oil is injected into intermediate receptacle
One 10, crude oil is isolated with lower flow with piston, open the air in displacement pump emptying receptacles；It is slow from the top of intermediate receptacle 2 11
Slow nitrogen injection, air in emptying receptacles；Ready rock core is put into core holding unit 4；According to the schematic flow sheet in Fig. 1
Connection experimental provision：Ring press pump 1 adds ring to press 2MPa to core holding unit, adjusts choke valve, slow to be supplemented to intermediate receptacle 1
Pressure makes up to reservoir pressure P0, in the process control ring pressure be consistently higher than the pressure 2MPa of intermediate receptacle 2 11；Will experiment
Temperature rises to reservoir temperature T0, control the ring pressure of the pressure of intermediate receptacle 2 11 and core holding unit 4 constant in temperature-rise period；Setting
The flow Q of constant-flux pump 80, open constant-flux pump 8 and start displacement, and start timing, control ring pressure is consistently higher than displacement pressure in displacement process
Power 2MPa；According to advection pump discharge Q0And rock pore volume LA ф, calculate one times of pore volume time T of displacementф= LAф/Q0；
When Dose times reach 3~5 times of TфWhen, sampler 13 is connected on sample tap 12, the stream in emptying intermediate receptacle 2 11
Body, measures fluid volume；Sample tap 12 is closed, timing, record displacement pressure differential deltap P is started simultaneously at01；Continue the T of about 2 times of displacementф,
The fluid of sampling emptying intermediate receptacle 2 11, metering fluid volume V0, sample tap 12 is closed, while when stopping timing and recording measurement
Between t0, displacement pressure differential deltap P02；Rock core original permeability is calculated according to Darcy formula；According to above-mentioned step
It is rapid to continue displacement, can obtain permeability KiWith the situation of change of mother oil displacement volume V；Can be adjusted according to actual conditions in test process
The test interval of whole permeability；Draw the relation curve of core permeability and mother oil displacement volume.
Thus, can be in the case of Accurate Determining different reservoir condition, different displacement flows and core permeability, heavy group
Divide extent of injury and rule of the deposition to reservoir.
Specific operational instances 2
According to specific operational instances 1, rock core original permeability K is determined0Afterwards, experimental temperature to T is reducedi, stand or continue
The T that 5~30 times of displacementф, determine permeability；The cold injury under reservoir different temperatures can thus be determined
Evil situation；After the completion of measure, the T that reservoir temperature continues 5~30 times of displacement is returned toф, the situation of change of permeability is determined, thus
For open-birth produce during whether can release the permeability impairment that reservoir cold damage is caused.
Thus, can Accurate Determining reservoir cold damage degree and rule.
Many details are elaborated in above description in order to fully understand the present invention, but, the present invention can be with
Other modes described here are different from using other to implement, it is thus impossible to be interpreted as limiting the scope of the invention.
In a word, although the present invention illustrates above-mentioned preferred embodiment, although it should be noted that those skilled in the art
Member can carry out various change and remodeling, unless such change and remodeling deviate from the scope of the present invention, otherwise should all wrap
Include within the scope of the present invention.
Claims (4)
1. a kind of heavy component deposition causes the method for testing of reservoir damage, it is characterised in that：Comprise the following steps：
（a）Reservoir representative core is taken to be pre-processed, and testing rock core porosity ф, length L and cross-sectional area A parameter；
（b）Corresponding reservoir crude oil is taken, viscosity of crude μ i under experimental temperature Ti are surveyed；
（c）By the intermediate receptacle one of crude oil injection experimentses device（10）, empty intermediate receptacle one（10）In air；
（d）With nitrogen purge intermediate receptacle two（11）In air；
（e）By step（a）Rock core after treatment is put into core holding unit（4）；
（f）Connection experimental provision；
（g）By ring press pump（1）To core holding unit（4）Plus ring pressure 2MPa, adjust choke valve（6）, slowly give intermediate receptacle two
（11）Supplement pressure makes up to reservoir pressure, and control ring pressure is consistently higher than intermediate receptacle two in the process（11）Pressure
2MPa；
（h）Experimental temperature is risen into reservoir temperature, intermediate receptacle two is controlled in temperature-rise period（11）Pressure and core holding unit（4）
Ring pressure is constant；
（i）Setting constant-flux pump（8）Flow Qi, open constant-flux pump（8）Start displacement, core holding unit is controlled in displacement process（4）
Ring pressure be consistently higher than displacement pressure 2MPa；
（j）When displacement fluid amount reaches 3~5 times of rock pore volumes, by sampler（13）It is connected to sample tap（12）On, emptying
Intermediate receptacle two（11）In fluid, measure fluid volume；
（k）Close sample tap（12）, start simultaneously at timing, record displacement pressure differential deltap P01,
（l）Continue 2 times of pore volume fluids of displacement, sampling emptying intermediate receptacle two（11）Fluid, metering fluid volume V0, pass takes
Sample mouthful（12）, while stopping timing and recording time of measuring t0, displacement pressure differential deltap P02；
（m）Rock core original permeability is calculated according to Darcy formula；
（n）Continue to determine situations of change of the permeability Ki with mother oil displacement volume V according to j~l steps；
（o）Draw the relation curve of core permeability and mother oil displacement volume；
Described experimental provision structure is as follows：Including intermediate receptacle one（10）, core holding unit（4）, intermediate receptacle two（11）, institute
The intermediate receptacle one stated（10）, core holding unit（4）, intermediate receptacle two（11）Needle-valve is passed sequentially through to connect and be arranged at perseverance
Incubator（3）Interior, described intermediate receptacle one（10）Constant-flux pump is connected with by pipeline（8）, connecting pipe is provided with pressure gauge one
（9）And needle-valve；Described core holding unit（4）Ring press pump is connected with by pipeline（1）, connecting pipe is provided with pressure gauge two
（2）And needle-valve；Described intermediate receptacle two（11）High-pressure air source is connected with by pipeline（7）, connecting pipe is provided with pressure gauge
Three（5）And choke valve（6）, intermediate receptacle two（11）On be additionally provided with sample tap（12）, sample tap（12）Connected by pipeline and needle-valve
It is connected to sampler（13）.
2. a kind of heavy component deposition according to claim 1 causes the method for testing of reservoir damage, it is characterised in that：Often
Nitrogen purge sampler is used before sub-sampling（13）In air.
3. a kind of heavy component deposition according to claim 1 causes the method for testing of reservoir damage, it is characterised in that：It is former
The measure of oil volume is carried out at that same temperature.
4. a kind of heavy component deposition according to claim 1 causes the method for testing of reservoir damage, it is characterised in that：Institute
The step of stating（a）Core pretreatment include washing oil, drying, saturation stratum water.
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| 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 |
| CN105973786A (en) * | 2016-07-14 | 2016-09-28 | 西南石油大学 | Shale base block dynamic damage evaluation device and method based on liquid pressure pulse |
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| CN108982333A (en) * | 2018-10-18 | 2018-12-11 | 四川富利斯达石油科技发展有限公司 | A kind of gas survey core porosity device |
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| CN114062215B (en) * | 2020-08-03 | 2023-10-31 | 中国石油天然气股份有限公司 | Core high-pressure measurement permeability experimental device and evaluation method |
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| CN102507414B (en) * | 2011-11-22 | 2014-05-14 | 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 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC (China) Limited Zhanjiang Branch Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100000 China oil tower, 25 Chaoyangmen North Street, Chaoyang District, Beijing Co-patentee before: CNOOC (China) Limited Zhanjiang Branch Patentee before: China National Offshore Oil Corporation |
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