CN106596346A - Device and method for controlling displacement in oil reservoir rock wettability determination - Google Patents
Device and method for controlling displacement in oil reservoir rock wettability determination Download PDFInfo
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- CN106596346A CN106596346A CN201611052725.0A CN201611052725A CN106596346A CN 106596346 A CN106596346 A CN 106596346A CN 201611052725 A CN201611052725 A CN 201611052725A CN 106596346 A CN106596346 A CN 106596346A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000011435 rock Substances 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 238000002474 experimental method Methods 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 50
- 239000000523 sample Substances 0.000 description 43
- 238000011084 recovery Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 239000006101 laboratory sample Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a device and a method for controlling displacement in oil reservoir rock wettability measurement. The method mainly solves the problem that the original oil film in rock pores is damaged by excessive displacement in the existing oil reservoir rock wettability experiment, so that the original wettability is changed. The method is characterized in that: the core holder is connected with a resistivity tester; and the core holder and the resistivity tester are connected with the oil-water metering tank and the container through pipelines. The method for controlling displacement in the determination of the wettability of the oil deposit rock comprises the following steps: 1) detecting data of resistivity change measured in the water-displacing process of the experimental oil, and monitoring the water-containing state of the rock sample in the displacing process through the resistivity change; 2) and detecting data of resistivity change measured in the experimental oil-water flooding process, and monitoring the residual oil state of the rock sample through the resistivity change. The method for controlling the displacement amount in the oil reservoir rock wettability determination can effectively monitor the displacement degree of oil and water in an experiment and ensure that data representing the true oil reservoir rock wettability are obtained.
Description
Technical field
The present invention relates to control displacement in oil extraction in oil field oil reservoir technical field, especially a kind of reservoir rockses wettability determination
The method and device of amount.
Background technology
Specification oil in more detail in People's Republic of China's oil and gas industry standard (SY/T 5153-2007)
Hide rock wettability experimental procedure and associative operation standard.I.e. test in each core sample will first oil drive saturated oils so that its
Constraint water state is reached, again water drive is replaced to residual oil state after the Absorb Water experiment after, and again oily displacement is saturated to after oil suction
Constraint water state.But due to the complexity and particularity of reservoir rockses structure, core sample test experience side in petroleum industry
The uniqueness of method, each laboratory sample does not have the repeatability of experiment.Therefore in above-mentioned crucial detecting step displacement test
In the concrete displacement test amount of each sample be difficult to unified standard volume to define.Therefore fail to be given in the standard and how to control
Displacement amount method (see experimental procedure 3.5.1.1a, 3.5.1.1b and 3.5.3.2,3.5.5.2 in SY/T 5153-2007).It is real
Border in an experiment the irreducible water of core sample, residual oil number by oil-water displacement amount direct control, with direct correlation
Property.The not enough and undue displacement of displacement is different experimental datas by what is obtained.Therefore oily expelling water water drive oil process displacement in testing
Amount number whether reasonable will affect final experimental result.Both at home and abroad displacement amount is not all controlled in the experimental technique at present
Relevant report.
The content of the invention
The present invention cannot be monitored for solving displacement amount in testing due to reservoir rockses wettability present in background technology
And then in destruction blowhole original oil film thus change the problem of original wettability, there is provided a kind of reservoir rockses wettability is surveyed
The method and device of control displacement amount in fixed, the present invention can effectively monitor sample oil, water saturation degree in experiment, to ensure
Wettability experiment can obtain the data of the reservoir rockses wettability for representing real.
The present invention solves its problem can be reached by following technical solution：Displacement is controlled in a kind of reservoir rockses wettability determination
The device of amount, including high-pressure metering pump, middle water container tank and simulative oilcan, the high-pressure metering pump outlet line connects respectively
Middle water container tank and stratum water pot top, the tank bottoms pipeline of the middle water container connects simulative oilcan, the tank bottoms pipe of simulative oilcan
Line connects core holding unit, and on the core holding unit Instrument Measuring Resistivity of Carbon Products is connected to；The tank bottoms pipeline connection simulation of the water pot
Oil tank bottom pipeline；The core holding unit and Instrument Measuring Resistivity of Carbon Products pipeline connection oil-water metering instrument and container, the rock core folder
Holder connects outer press pump.
Invention broadly provides a kind of method that oil-water displacement is controlled in reservoir rockses wettability determination, comprises the following steps：
1), rock sample stratum resistivity of water is determined with Instrument Measuring Resistivity of Carbon Products first：Determine the stratum water of rock sample
Resistivity as the resistivity determined in whole experiment minimum, when core sample by water drive for after water saturation be close to
Resistivity value is no less than this value when 100%；
2) delta data of resistivity during oily expelling water, is recorded, is reflected in displacement process by the change of resistivity
The saturation state of rock sample is determining displacement test process：With experiment with oily displacement, make rock sample relatively low by reaching compared with high-moisture percentage
The moisture content of intimate minimum extreme value, when rock sample eventually arrives at constraint water state, change in resistance should be changed from small to big, and finally count
Value is basically unchanged；
3) data of change in resistance during water drive oil, are recorded；The rock in displacement process is gone out by the reacting condition of resistivity
The residual oil state of sample is determining displacement test process：Replaced with stratum water drive, make rock sample by higher oil content to relatively low oil-containing
Rate, when rock sample eventually arrives at residual oil state, change in resistance should from large to small, displacement be terminated when being finally basically unchanged.
The principle of displacement amount method is controlled in the reservoir rockses wettability determination：Because core sample is in different water cut saturation shape
Have corresponding resistivity value during state, determined with the delta data of core sample resistivity in experiment core sample containing watery
State, decides whether to continue oil-water displacement experiment according to the change of resistivity with constant.When core sample resistivity value is changed very little,
Illustrate that rock core moisture content has reached requirement of experiment, stop oil-water displacement.
It is of the invention to have the advantages that compared with above-mentioned background technology：Control in the reservoir rockses wettability determination is driven
For the device and method of amount, further clearly specification experimental procedure, by original personal subjective judgment determines displacement test
Process is changed to be determined by the change of resistivity value, reduces impact of the anthropic factor to experimental data.Make the constraint of rock sample
Water state and residual oil state are closer to layer reality on the spot, the more scientific reliability of final experimental result.The present invention passes through
The change of sample resistivity in monitoring experiment, when last resistivity no longer changes, has illustrated rock sample interior moisture content
Irreducible water (water drive oil is also in the same manner) state is reached, thus can reflect that oil (water) displacement in experiment core sample has reached
Experiment purpose.Laboratory sample can in time be ensured not by undue or not enough oil-water displacement by said method, experiment effect is improve
Rate reduces experimental cost.Experimental data makes the inspection of reservoir cores wettability in petroleum industry with more scientific and reliability
More specification, accurately is surveyed, makes testing result more scientifically reflect the wetting state of oilbearing stratum rock.Reservoir rockses moistening
Property is one of key data indispensable in oilfield development program.The accurate experimental data of science is applied to formulate oil field development
Scheme, for understanding oil reservoir lithologic character, instructs secondary oil field, tertiary oil recovery and additive method to recover the oil and improves oil recovery factor
There is particularly important meaning.
Description of the drawings：
Accompanying drawing 1 is experimental determination device schematic flow sheet of the present invention；
Water container in the middle of 1- high-pressure metering pumps, 2-, 3- simulative oilcans, 4- water pots, 5- core holding units, 6- Instrument Measuring Resistivity of Carbon Products,
7- oil-water metering tanks, the outer press pumps of 8-, 9- containers.
Accompanying drawing 2 is sample moisture content and resistivity relation curve chart in the embodiment of the present invention 1.
Specific embodiment：
Below in conjunction with specific embodiment, the invention will be further described：
Embodiment 1
As shown in figure 1, the device of displacement amount is controlled in a kind of reservoir rockses wettability determination, including high-pressure metering pump 1, middle water
Container 2 and simulative oilcan 3, the outlet line of the high-pressure metering pump 1 connects respectively middle water container 2 and the top of water pot 4, it is described in
Between the tank bottoms pipeline of water container 2 connection simulative oilcan 3, the tank bottoms pipeline of simulative oilcan 3 connection core holding unit 5, on core holding unit 5
It is connected to Instrument Measuring Resistivity of Carbon Products 6；The tank bottoms pipeline connection tank bottoms pipeline of simulative oilcan 3 of the water pot 4；The core holding unit 5 and
The pipeline of Instrument Measuring Resistivity of Carbon Products 6 connection oil-water metering tank 7 and container 9, the core holding unit 5 connects outer press pump 8, and each profit holds
Device is imported and exported to be had switch gate as needed to control the flowing of fluid.
The related data of the change of resistivity during detection water drive oil；Experiment water drive oil process is as shown in phantom in Figure 1.In height
Under pressure dosing pump 1 (constant flow, determine displacement amount) drives, the oil in displacement pump drives in the top of injection water water pot 4, injects water and enters rock
Heart clamp holder 5 is driven in core sample 1, is flowed out in outlet, reaches stopping water drive oil process after the displacement amount of setting.In the same manner oil drives
Water process is that oil is initially injected in middle water container 2 in high-pressure metering pump 1, and simulation oil is injected in simulative oilcan 3 in the middle water capacity
It is injected into after the displacement amount that setting is reached in the core sample in clamper 5 under the pressure effect of the Water transport of device 2 and completes oily expelling water
Experiment.Rock core oil expelling water is as shown in solid lines in fig. 1.Instrument Measuring Resistivity of Carbon Products on core holding unit, can survey in time in an experiment
Make during water drive oil, oily expelling water resistivity of water in sample.Fig. 2 is shown in the change of the water drive oil process resistivity of core sample 1
Shown, table 1 is experiment rock core resistivity and moisture content corresponding data table.The later stage is driven to have a resistance in low speed and middling speed
It is necessary to raising displacement velocity in time during one platform of rate variable quantity very little.In the high speed displacement stage, change in resistance is seldom
Displacement should in time be stopped.It thus is avoided that excessive displacement has manually changed the original wettability of core sample.Through low speed, in
Speed, high-speed driving finally illustrate that core sample has reached the residual oil (irreducible water) of requirement of experiment when resistivity no longer changes
State.Stop displacement process, terminate this displacement test.
The saturation state of core sample is reacted with the change curve of core sample resistivity in experiment, according to the change of resistivity with
It is constant come decide whether continue oil-water displacement experiment.Core sample resistivity value is changed very little, and illustrates that rock core moisture content reaches
Requirement of experiment, stops oil-water displacement.As shown in Fig. 2 the incipient stage, resistivity curve declines quickly, in illustrating core sample
By a large amount of displacements of water out, curve stage casing change in resistance is not very big to oil, accelerates decline again in curve back segment resistivity, directly
It is minimum to constant resistance rate phase change rate is finally stablized, it has been finally reached experiment purpose.
The rock core resistivity of table 1.-aqueous rate score
Embodiment 2-6：
Tested by carrying out the oily expelling water of different displacement amounts to core sample 2-6, step is with embodiment 1, the oily expelling water mistake for drawing
Journey change in resistance data are shown in Table 2, and from table 2, whether detection sample reaches the final water saturation of needs, different rock cores
Sample needs different displacement amounts can be only achieved, and to avoid displacement undue and displacement is not enough, only when last stage resistivity
When change in value is minimum, now the water in core sample has stablized constant, here it is the result of our requirements.It is electric from Fig. 2
Resistance rate curve it is also seen that；If stage casing is the slowly varying stage. support without this data, in an experiment our subjective poles
Easily judge that now displacement test should be nearly completed, core sample is substantially saturated and finishes this and terminate displacement, thus will no
To different optimal displacement amounts, the experimental data of acquisition is false, then this experimental data is impossible to science
Property and accuracy.
According to the quantum of output of water in accumulative oily expelling water experimentation or the quantum of output oil content of accumulative flood pot test process oil, then
Finally no longer change with reference to the number curve of record resistivity, it is determined that terminate displacement test order, into the next one of test experience
Step.
The present invention adopts above scheme, by the change of sample resistivity in monitoring experiment, when resistivity no longer changes, explanation
Rock sample interior moisture content has reached irreducible water (water drive oil is also in the same manner) state, thus can reflect the oil (water) of experiment
Displacement has reached experiment purpose.By said method can reflect in time water content in sample number, it is ensured that experiment sample
Product by undue or not enough oil-water displacement, do not improve conventional efficient.Experimental data makes oil with more scientific and reliability
The detection of reservoir cores wettability more specification, accurately in industry, testing result is more scientifically reflected reflect ground
The wetting state of lower reservoir rock.For understanding oil reservoir lithologic character, secondary oil field, tertiary oil recovery and additive method is instructed to adopt
It is significant that oil improves oil recovery factor.
The core sample 2-6 of table 2 oil expelling water process change in resistance tables of data
Claims (3)
1. the device of displacement amount, including high-pressure metering pump are controlled in a kind of reservoir rockses wettability determination（1）, middle water container
（2）And simulative oilcan（3）, the high-pressure metering pump（1）Outlet line connects respectively middle water container（2）And water pot（4）Top,
The middle water container（2）Tank bottoms pipeline connects simulative oilcan（3）, simulative oilcan（3）Tank bottoms pipeline connects core holding unit
（5）, it is characterised in that：The core holding unit（5）On be connected to Instrument Measuring Resistivity of Carbon Products（6）；The water pot（4）Tank bottoms pipeline connect
Connect simulative oilcan（3）Tank bottoms pipeline；The core holding unit（5）And Instrument Measuring Resistivity of Carbon Products（6）Pipeline connects oil-water metering tank（7）
And container（9）, the core holding unit（5）The outer press pump of connection（8）.
2. the method that displacement amount device is controlled in a kind of reservoir rockses wettability determination described in a kind of application claim 1, bag
Include following steps：
1）, first determine rock sample stratum resistivity of water as a normal data with Instrument Measuring Resistivity of Carbon Products, be whole
The minimum of the resistivity determined in displacement test；
2）, during the oily expelling water of record resistivity delta data, the rock in displacement process is monitored by the change of resistivity
The saturation state of sample is determining test experience process：
With experiment with oily displacement, make rock sample by the moisture content that relatively low intimate minimum extreme value is reached compared with high-moisture percentage, rock sample is final
When reaching constraint water state, change in resistance should be changed from small to big, and last numerical value terminates displacement when being basically unchanged；
3）, record water drive oil during change in resistance data；The data of the change of resistivity, lead to during record water drive oil
The change for crossing resistivity determines test experience process to monitor the residual oil state of the rock sample in displacement process：
Experimental water displacement is used, makes rock sample by higher oil content to relatively low oil content, when rock sample eventually arrives at residual oil state,
Change in resistance should from large to small, displacement be terminated when being finally basically unchanged.
3. the method that displacement amount is controlled in a kind of reservoir rockses wettability determination according to claim 2, it is characterised in that：
The saturation state of core sample is reacted with the delta data of core sample resistivity in experiment, according to the change of resistivity with it is constant
To decide whether to continue oil-water displacement experiment；Core sample resistivity value is changed very little, and illustrates that rock core moisture content has reached experiment
Require, stop oil-water displacement.
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| CN201611052725.0A CN106596346A (en) | 2016-11-24 | 2016-11-24 | Device and method for controlling displacement in oil reservoir rock wettability determination |
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| CN201611052725.0A CN106596346A (en) | 2016-11-24 | 2016-11-24 | Device and method for controlling displacement in oil reservoir rock wettability determination |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507241A (en) * | 2017-09-14 | 2019-03-22 | 北京康普瑞基石油工程技术有限公司 | A kind of new method and equipment of resistance measurement rock wettability |
| CN112782477A (en) * | 2019-11-11 | 2021-05-11 | 中国石油化工股份有限公司 | Method and system for measuring electrical response characteristics of rock core in different wetting states |
| CN112859180A (en) * | 2021-01-04 | 2021-05-28 | 中国石油天然气集团有限公司 | Rock wettability recognition method and device based on rock electrical experiment data |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112782477A (en) * | 2019-11-11 | 2021-05-11 | 中国石油化工股份有限公司 | Method and system for measuring electrical response characteristics of rock core in different wetting states |
| CN112782477B (en) * | 2019-11-11 | 2024-05-14 | 中国石油化工股份有限公司 | Method and system for measuring electrical response characteristics of rock core in different wetting states |
| CN112859180A (en) * | 2021-01-04 | 2021-05-28 | 中国石油天然气集团有限公司 | Rock wettability recognition method and device based on rock electrical experiment data |
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Application publication date: 20170426 |