CN106285647B - Tracer Technique quantitative assessment sea oil reservoir waterflooding development effect method - Google Patents
Tracer Technique quantitative assessment sea oil reservoir waterflooding development effect method Download PDFInfo
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Abstract
The present invention provides a kind of Tracer Technique quantitative assessment sea oil reservoir waterflooding development effect method, this method comprises: accordingly studying different wells in well group or research unit in reservoir numerical simulation model is added different tracers；Count adjacent oil well output tracer type and tracer quantum of output size around each well；Which water injection well of oil well tracer source determined；Plane connection is by effect situation between judging oil-water well according to each oil well tracer quantum of output size and tracer type, and whether Judge plane reaches equilibrium displacement；Oil well interlayer tracer output type and tracer quantum of output size are counted to reflect that oil-water well longitudinal direction interlayer corresponds to displacement situation；Evaluate reservoir waterflooding whether equilibrium displacement.This method solves marine oil reservoir and invests the problems such as big operation is difficult, significantly reduces the practical tracer application cost in scene, realizes marine oil reservoir waterflooding development effect Fast Evaluation, is reached for mining site and provides the purpose of dynamic adaptation foundation.
Description
Technical field
It is developed the present invention relates to marine oil reservoir high-speed and high-efficiency and improves recovery ratio field, in particular to how to utilize numerical reservoir
The method for simulating Tracer Technique quantitative assessment sea oil reservoir waterflooding development effect.
Background technique
China's offshore oil is ensconced in oil development and is played an important role, and triumph marine chengdao oilfield is China, shallow sea, pole
Area puts into the 1 year oil-producing megaton oil field of development & construction, which is located at Southern Bohai pole shallow sea area, sea situation
Complicated condition, bad environments belong to offshore marginal oilfield, and the exploitation in the oil field is directly related to the marine exploitation success or failure of triumph.
Offshore oilfield has the characteristics that production and infuses water layer multiple, the tubing string service life limits, it is big to invest, and dynamic monitoring means are limited, data lacks
Weary, it is limited that interlayer employs awareness.
In order to make full use of resource, the recovery ratio in platform validity period is improved, it is necessary to first in the exploitation of solution chengdao oilfield
Existing principal contradiction and problem, speed-raising exploitation.Carrying out extract speed-raising exploitation is the important hand for improving platform validity period recovery ratio
One of section, in order to guarantee extract effect, then holding dynamic note and adopting by effect corresponding relationship is key element.How quantitative assessment oil reservoir
Waterflooding development effect simultaneously provides effective foundation for scene allotment, generally uses tracer monitoring result and water suction in mining site practice
Sectional data analysis, but limited by field operation ability and construction operation expense, this method application scale at sea still has in oil field
Certain limitation.
In order to rapidly and efficiently evaluate oil reservoir plane and interlayer 3 D stereo waterflooding development effect, accurately holds note and adopt by effect shape
Condition, reservoir numerical simulation Tracer Technique quantitative assessment sea oil reservoir waterflooding development effect are to reinforce dynamic analysis, improve to infuse and adopt
Situation understanding, improves one of Development Response of Oilfield powerful measure.We have invented a kind of new Tracer Techniques quantitatively to comment thus
Valence sea oil reservoir waterflooding development effect method, solves the above technical problem.
Summary of the invention
Reservoir numerical simulation Tracer Technique quantitative analysis sea waterflooding extraction is utilized the object of the present invention is to provide a kind of
The method of oil reservoir plane and interlayer equilibrium displacement waterflooding development effect solves marine oil reservoir and invests the problems such as big operation is difficult, substantially
Degree reduces the practical tracer application cost in scene, realizes marine oil reservoir waterflooding development effect Fast Evaluation, is reached for mining site offer
The purpose of dynamic adaptation foundation.
The purpose of the present invention can be achieved by the following technical measures: Tracer Technique quantitative assessment sea reservoir water is opened
Effect method is sent out, which includes: step 1, in numerical reservoir
Different wells in well group or research unit are accordingly studied in simulation model, and different tracers are added；Step 2, it counts around each well
Adjacent oil well output tracer type and tracer quantum of output size；Step 3, which water injection well of oil well tracer source determined；
Step 4, judge that plane connection is by effect situation between oil-water well according to each oil well tracer quantum of output size and tracer type, and sentence
Whether disconnected plane reaches equilibrium displacement；Step 5, oil well interlayer tracer output type and tracer quantum of output size are counted with anti-
It reflects oil-water well longitudinal direction interlayer and corresponds to displacement situation；Step 6, evaluation reservoir waterflooding whether equilibrium displacement.
The purpose of the present invention can be also achieved by the following technical measures:
In step 1, different wells in well group or research unit are accordingly studied in reservoir numerical simulation model to be added not
It include to come from the played tracer of which well in each produced liquid in oil well in research well group or unit to distinguish with tracer code name,
To carry out waterflooding development effect evaluation and quantitatively deploy for vector quantization to provide foundation.
In step 2, Production development prediction is carried out with the reservoir numerical simulation model after addition tracer, is adopted after prediction
Each oil well is counted with reservoir numerical simulation keyword individual well tracer rate of withdrawal WTPR, individual well tracer accumulation produced quantity WTPT
The instantaneous quantum of output of tracer and accumulation quantum of output, count each oil well tracer quantum of output size by tracking.
In step 3, big according to oil well tracer output classification and quantum of output in step 2 centered on studied oil well
Different tracer types under small each well institute of combination, which water injection well of oil well tracer source are determined, and analyze oil-water well note and adopt
It corresponds to by effect situation, specifies grease interwell communication by effect relationship, provide foundation for live subsequent quantizatiion allotment.
In step 4, well between acquisition oil-water well is calculated by step 2 tracer quantitative statistics result and corresponds to oil well note
Enter amount allocation proportion relationship, and whether Judge plane reaches equilibrium displacement, plane equilibrium displacement coefficient formula on this basis are as follows:
Wherein, FP- plane equilibrium displacement coefficient, f；
QimaxWell maximum shunt amount, m between-oil-water well3/d；
QiminWell minimum shunt volume, m between-oil-water well3/d；
- well maximum shunt amount direction oil-water well line is averaged oil saturation, f；
- well minimum shunt volume direction oil-water well line is averaged oil saturation, f.
In step 4, it is 3 that whether Judge plane, which reaches the critical value of equilibrium displacement, when equilibrium displacement coefficient is less than 3
Otherwise equilibrium displacement is lack of balance displacement.
In steps of 5, tracer rate of withdrawal CTPR, layering tracer are layered by numerical reservoir simulation method keyword
It accumulates produced quantity CTPT and counts each oil well longitudinally instantaneous quantum of output of each layer tracer and accumulation quantum of output, further clarify note and adopt layer
Between displacement situation, layering tracer yielding condition is counted by each oil well, water injection well layering split stream of injected water amount can be obtained, it is clear
Well judges whether interlayer reaches equilibrium displacement in the connected relation of longitudinal each layer and oil well and by effect situation, realize by
Quantitative analysis of the full well to the longitudinally correspondence connected relation of each layer, interlayer equilibrium displacement coefficient formula are as follows:
Wherein, FV- interlayer equilibrium displacement coefficient, f；
Ii max fw- well corresponds to oil well high aquifer formation injection index, m3/d/m；
fw1- well corresponds to oil well high aquifer formation moisture content, f；
Ii min fw- well corresponds to the low water-bearing layer injection index of oil well, m3/d/m；
fw2- well corresponds to the low water-bearing layer moisture content of oil well, f.
In steps of 5, judge whether interlayer reaches the critical value of equilibrium displacement for 0.3, when interlayer equilibrium displacement coefficient is small
It is equilibrium displacement in 0.3, is otherwise lack of balance displacement.
In step 6, by step 4 and step 5 can integrate between determining oil-water well plane and interlayer whether equilibrium displacement,
When the two reaches equilibrium displacement standard, it is believed that reservoir waterflooding effect is preferable, and otherwise waterflooding development effect has allotment
Space, evaluate the practical waterflooding development effect of current oil reservoir on this basis and there are problem, and plane and longitudinal arrow can be carried out
Quantify quantification allotment, to realize the longitudinal maximization equilibrium displacement with plane of oil reservoir, improves reservoir waterflooding effect.
Tracer Technique quantitative assessment sea oil reservoir waterflooding development effect method in the present invention, technical thought understand, answer
It with simple, solves field operation ability and operating cost limitation problem, is adopted to realize that marine oil reservoir high-speed and high-efficiency exploitation improves
Yield provides practicable technical method.This method is in the northern 11 wellblock extract pilot tests of the marine chengdao oilfield field of razor clam of triumph
It is applied, a bite well Evaluation of Affusion Effect and dynamic adaptation design is successfully directed according to this method.Using this method
After implementing scene, well water decline is realized, the good result that oil-producing rises achieves preferable economic benefit and society's effect
Benefit.
Detailed description of the invention
Fig. 1 is a specific embodiment of Tracer Technique quantitative assessment sea oil reservoir waterflooding development effect method of the invention
Flow chart；
Fig. 2 is that tracer plane flows concentration profile in well；
Fig. 3 is that each oil well tracer quantum of output changes over time figure around well；
Fig. 4 is tracer in longitudinal each layer concentration distribution condition diagram；
Fig. 5 changes over time figure in the longitudinal layered quantum of output of oil well for tracer IW1.
Specific embodiment
To enable above and other objects, features and advantages of the invention to be clearer and more comprehensible, preferably implementation is cited below particularly out
Example, and cooperate shown in attached drawing, it is described in detail below.
As shown in FIG. 1, FIG. 1 is the streams of Tracer Technique quantitative assessment sea oil reservoir waterflooding development effect method of the invention
Cheng Tu.
In step 101, different wells in well group or research unit are accordingly studied in reservoir numerical simulation model and are added not
It include from which in each produced liquid in oil well its purpose is to distinguish in research well group or unit with tracer code name, such as IW1
The played tracer of a little wells, to carry out waterflooding development effect evaluation and quantitatively deploy for vector quantization to provide foundation.
In step 102, adjacent oil well output tracer type and tracer quantum of output size around each well are counted.With
Reservoir numerical simulation model after tracer is added carries out Production development prediction, and reservoir numerical simulation keyword is used after prediction
WTPR (individual well tracer rate of withdrawal), each instantaneous quantum of output of oil well tracer of WTPT (individual well tracer accumulates produced quantity) statistics
And accumulation quantum of output, each oil well tracer quantum of output size is counted by tracking, sees Fig. 2.
In step 103, centered on studied oil well, according to oil well tracer output classification and quantum of output in step 102
Size combines different tracer types under each well institute, which water injection well of oil well tracer source is determined, and analyze oil-water well note
It adopts and corresponds to by effect situation, specify grease interwell communication by effect relationship, provide foundation for live subsequent quantizatiion allotment.
In step 104, plane is connected between judging oil-water well according to each oil well tracer quantum of output size and tracer type
By effect situation, and well between acquisition oil-water well can be calculated by step 102 tracer quantitative statistics result and correspond to oil well injection
Allocation proportion relationship is measured, sees Fig. 3, and whether Judge plane reaches equilibrium displacement (critical value 3) according to the following formula on this basis,
When equilibrium displacement coefficient less than 3 be equilibrium displacement, be otherwise lack of balance displacement.Plane equilibrium displacement coefficient formula are as follows:
Wherein, FP- plane equilibrium displacement coefficient, f；
QimaxWell maximum shunt amount, m between-oil-water well3/d；
QiminWell minimum shunt volume, m between-oil-water well3/d；
- well maximum shunt amount direction oil-water well line is averaged oil saturation, f；
- well minimum shunt volume direction oil-water well line is averaged oil saturation, f.
In step 105, oil well interlayer tracer output type and tracer quantum of output are counted using CTPR, CTPT keyword
Size is to reflect that oil-water well longitudinal direction interlayer corresponds to displacement situation.On the basis of step 104, closed yet by numerical reservoir simulation method
Key word CTPR (layering tracer rate of withdrawal), CTPT (layering tracer accumulates produced quantity) each oil well longitudinally each layer tracer of statistics
The instantaneous quantum of output of agent and accumulation quantum of output further clarify note and adopt interlayer displacement situation (model longitudinal grid number is 29 layers), see
Fig. 4.Layering tracer yielding condition is counted by each oil well, water injection well layering split stream of injected water amount can be obtained, see Fig. 5, it is clear
Well judges whether interlayer reaches balanced drive in the connected relation of longitudinal each layer and oil well and by effect situation according to the following equation
For (critical value 0.3), the quantitative analysis of the correspondence connected relation by full well to longitudinal each layer is realized.Interlayer equilibrium displacement system
Number formula are as follows:
Wherein, FV- interlayer equilibrium displacement coefficient, f；
Ii max fw- well corresponds to oil well high aquifer formation injection index, m3/d/m；
fw1- well corresponds to oil well high aquifer formation moisture content, f；
Ii min fw- well corresponds to the low water-bearing layer injection index of oil well, m3/d/m；
fw2- well corresponds to the low water-bearing layer moisture content of oil well, f.
When interlayer equilibrium displacement coefficient less than 0.3 be equilibrium displacement, be otherwise lack of balance displacement.
In step 106, it is whether balanced that plane and interlayer between determining oil-water well can be integrated by step 104 and step 105
Displacement, when the two reaches equilibrium displacement standard, it is believed that reservoir waterflooding effect is preferable, and otherwise waterflooding development effect exists
The space of allotment.The practical waterflooding development effect of current oil reservoir is evaluated on this basis and there are problems, and can be carried out plane and be indulged
It is deployed to vector quantization quantification, to realize the longitudinal maximization equilibrium displacement with plane of oil reservoir, improves reservoir waterflooding effect.
Claims (5)
1. Tracer Technique quantitative assessment sea oil reservoir waterflooding development effect method, which is characterized in that the Tracer Technique is quantitative
Evaluating marine oil reservoir waterflooding development effect method includes:
Step 1, different wells in well group or research unit are accordingly studied in reservoir numerical simulation model, and different tracers are added；
Step 2, adjacent oil well output tracer type and tracer quantum of output size around each well are counted；
Step 3, which water injection well of oil well tracer source determined；
Step 4, according to each oil well tracer quantum of output size and tracer type judge between oil-water well plane connection by effect situation,
And whether Judge plane reaches equilibrium displacement；
Step 5, oil well interlayer tracer output type and tracer quantum of output size are counted to reflect oil-water well longitudinal direction interlayer pair
Answer displacement situation；
Step 6, evaluation reservoir waterflooding whether equilibrium displacement；
In step 4, well between acquisition oil-water well is calculated by step 2 tracer quantitative statistics result and corresponds to oil well injection rate
Allocation proportion relationship, and whether Judge plane reaches equilibrium displacement, plane equilibrium displacement coefficient formula on this basis are as follows:
Wherein, FP- plane equilibrium displacement coefficient, f；
QimaxWell maximum shunt amount, m between-oil-water well3/d；
QiminWell minimum shunt volume, m between-oil-water well3/d；
- well maximum shunt amount direction oil-water well line is averaged oil saturation, f；
- well minimum shunt volume direction oil-water well line is averaged oil saturation, f；
Judge plane whether reach equilibrium displacement critical value be 3, when equilibrium displacement coefficient less than 3 be equilibrium displacement, otherwise
For lack of balance displacement；
In steps of 5, tracer rate of withdrawal CTPR, layering tracer accumulation are layered by numerical reservoir simulation method keyword
Produced quantity CTPT counts each oil well longitudinally instantaneous quantum of output of each layer tracer and accumulation quantum of output, further clarifies note and adopts interlayer drive
For situation, layering tracer yielding condition is counted by each oil well, water injection well layering split stream of injected water amount can be obtained, specify well
In the connected relation of longitudinal each layer and oil well and by effect situation, and judge whether interlayer reaches equilibrium displacement, realizes by full well
To the quantitative analysis of the correspondence connected relation of longitudinal each layer, interlayer equilibrium displacement coefficient formula are as follows:
Wherein, FV- interlayer equilibrium displacement coefficient, f；
Iimaxfw- well corresponds to oil well high aquifer formation injection index, m3/d/m；
fw1- well corresponds to oil well high aquifer formation moisture content, f；
Iiminfw- well corresponds to the low water-bearing layer injection index of oil well, m3/d/m；
fw2- well corresponds to the low water-bearing layer moisture content of oil well, f；
Judge whether interlayer reaches the critical value of equilibrium displacement for 0.3, when interlayer equilibrium displacement coefficient drives less than 0.3 to be balanced
It replaces, is otherwise lack of balance displacement.
2. Tracer Technique quantitative assessment according to claim 1 sea oil reservoir waterflooding development effect method, feature exist
In in step 1, different wells in well group or research unit accordingly being studied in reservoir numerical simulation model, different tracers are added
Agent code name, to distinguish in research well group or unit in each produced liquid in oil well comprising coming from the played tracer of which well, so as into
Row waterflooding development effect, which is evaluated and quantitatively deployed for vector quantization, provides foundation.
3. Tracer Technique quantitative assessment according to claim 1 sea oil reservoir waterflooding development effect method, feature exist
In in step 2, with the reservoir numerical simulation model progress Production development prediction after addition tracer, using oil after prediction
Hide numerical simulation keyword individual well tracer rate of withdrawal WTPR, individual well tracer accumulation produced quantity WTPT counts each oil well tracer
The instantaneous quantum of output of agent and accumulation quantum of output, count each oil well tracer quantum of output size by tracking.
4. Tracer Technique quantitative assessment according to claim 1 sea oil reservoir waterflooding development effect method, feature exist
In in step 3, centered on studied oil well, according to oil well tracer output classification in step 2 and the combination of quantum of output size
Different tracer types under each well institute, determine which water injection well of oil well tracer source, and analyze oil-water well note adopt it is corresponding by
Effect situation specifies grease interwell communication by effect relationship, provides foundation for live subsequent quantizatiion allotment.
5. Tracer Technique quantitative assessment according to claim 1 sea oil reservoir waterflooding development effect method, feature exist
In, in step 6, by step 4 and step 5 can integrate between determining oil-water well plane and interlayer whether equilibrium displacement, when two
When person reaches equilibrium displacement standard, it is believed that reservoir waterflooding effect is preferable, and otherwise waterflooding development effect has the sky of allotment
Between, the practical waterflooding development effect of current oil reservoir is evaluated on this basis and there are problems, and can carry out plane and longitudinal vector quantization
Quantification allotment improves reservoir waterflooding effect to realize the longitudinal maximization equilibrium displacement with plane of oil reservoir.
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| CN113356806B (en) * | 2020-03-04 | 2023-07-04 | 中国石油化工股份有限公司 | Method and device for adjusting gas injection amount based on gas drive wave and coefficient and electronic equipment |
| CN112392456B (en) * | 2020-11-13 | 2023-07-25 | 中国石油天然气股份有限公司 | Well pattern layout rationality judging method and well pattern layout optimizing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3993131A (en) * | 1975-11-03 | 1976-11-23 | Cities Service Company | Tracing flow of petroleum in underground reservoirs |
| CN102650207A (en) * | 2012-05-09 | 2012-08-29 | 中国石油天然气股份有限公司 | Interwell layered tracing monitoring method |
| CN104632197A (en) * | 2013-11-14 | 2015-05-20 | 中国石油化工股份有限公司 | Method for determining water driving equilibrium displacement through tracer technology |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3993131A (en) * | 1975-11-03 | 1976-11-23 | Cities Service Company | Tracing flow of petroleum in underground reservoirs |
| CN102650207A (en) * | 2012-05-09 | 2012-08-29 | 中国石油天然气股份有限公司 | Interwell layered tracing monitoring method |
| CN104632197A (en) * | 2013-11-14 | 2015-05-20 | 中国石油化工股份有限公司 | Method for determining water driving equilibrium displacement through tracer technology |
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