CN106812508B - Well concocting method based on multifactor raising offshore oilfield interlayer use rate - Google Patents
Well concocting method based on multifactor raising offshore oilfield interlayer use rate Download PDFInfo
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- 239000011229 interlayer Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000010410 layer Substances 0.000 claims abstract description 45
- 239000003129 oil well Substances 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 claims abstract description 28
- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 20
- 238000012937 correction Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 230000003068 static effect Effects 0.000 claims abstract description 7
- 238000004088 simulation Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 abstract description 2
- 235000020681 well water Nutrition 0.000 abstract description 2
- 239000002349 well water Substances 0.000 abstract description 2
- 238000011161 development Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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Abstract
The present invention provides a kind of well concocting method based on multifactor raising offshore oilfield interlayer use rate, comprising: step 1, from static parameter, acquires interlayer formation capacity factor percentage；Step 2, the moisture content size of each layer in each production profile of oil well is calculated；Step 3, interlayer water distribution ratio is corrected with inversely prroportional relationship according to each layer moisture content size；Step 4, interlayer effect of saturation degree correction factor and the comprehensive allotment coefficient of interlayer are sought；Step 5, layering liquid separation amount size is acquired using the comprehensive allotment coefficient of interlayer；Step 6, layering liquid measure is split with proportional relationship according to average staturation size between oil-water well and assigns to corresponding well；Step 7, determine well layering Water injection rate water and Full water well with water injection rate.The well concocting method based on multifactor raising offshore oilfield interlayer use rate realizes well water decline, and the good result that oil-producing rises achieves preferable economic benefit and social benefit.
Description
Technical field
Developed the present invention relates to oil-gas reservoir high-speed and high-efficiency and improve recovery ratio field, in particular to based under the conditions of multifactor such as
What improves the well concocting method of interlayer use rate using Research Numerical Simulation Techique.
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 the limitation of tubing string service life, invests big, and high-speed and high-efficiency exploitation is the key that develop marine oil reservoir.
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 propose effect exploitation, in order to guarantee development effectiveness, then must base oneself upon and improve interlayer use rate,
Improve development effectiveness and ultimate recovery.
In order to improve oil reservoir interlayer use rate, in conjunction with the various factors in oil reservoir actual development, each factor is comprehensively considered
It influences, improves interlayer reserves exploitation rate, improve well waterflooding development effect, this is to improve waterflooding reservoir water flooding effectiveness
Key element.For this purpose, having invented this method, solve in practical waterflooding reservoir, based on the raising under the conditions of multifactor
The well concocting method of interlayer use rate.
Summary of the invention
The object of the present invention is to provide it is a kind of using Research Numerical Simulation Techique be based on it is multifactor under the conditions of how to improve layer
Between use rate well concocting method, realize offshore oil ensconce platform validity period in realize high-speed and high-efficiency exploitation target.
The purpose of the present invention can be achieved by the following technical measures: should be dynamic based on multifactor raising offshore oilfield interlayer
Include: with the well concocting method of rate
Step 1, from static parameter, interlayer formation capacity factor percentage is acquired；
Step 2, the moisture content size of each layer in each production profile of oil well is calculated；
Step 3, interlayer water distribution ratio is corrected with inversely prroportional relationship according to each layer moisture content size；
Step 4, interlayer effect of saturation degree correction factor and the comprehensive allotment coefficient of interlayer are sought；
Step 5, layering liquid separation amount size is acquired using the comprehensive allotment coefficient of interlayer；
Step 6, layering liquid measure is split with proportional relationship according to average staturation size between oil-water well and assigns to corresponding well；
Step 7, determine well layering Water injection rate water and Full water well with water injection rate；
In step 1, the oil well static state geologic parameter from injection-production well group calculates each oil well on the stratum of longitudinal each layer
COEFFICIENT K h calculates each layer formation capacity factor percentage Ai formula are as follows:
Wherein, Ki --- i-th layer of formation effective permeability size, md；
Hi --- i-th layer of Effective thickness of formation size, m；
I=1~n oil well production number of plies, n are positive integer；
In step 2, based on numerical simulation operation result, each layer in each production profile of oil well is calculated
Moisture content size；
In step 3, interlayer correction factor Bi under moisture content influence factor is determined, according to each layer moisture content size with inverse ratio
Example relationship corrects interlayer injection allocation water ratio, is fw1 in each layer moisture content, and when fw2, fw3 ... fwn, then moisture content influences interlayer and repairs
Positive coefficient Bi formula are as follows:
Wherein, fwi --- i-th layer of moisture content size；
I=1~n oil well production number of plies, n are positive integer；
In step 4, according to reservoir numerical simulation fitting result, how much quantify between oil-water well each layer remaining oil, according to oil
Water-drive control area is drawn out in well line direction, and it is big to calculate the oil-water well line direction oil saturation that is averaged within this range
It is small, and each layer effect of saturation degree correction factor Ci is acquired, interlayer injection allocation is corrected according to saturation dimension Relationship of Coefficients in direct ratio
Water:
- oil well production layer oil-water well line direction is averaged oil saturation size；
I=1~n oil well production number of plies, n are positive integer；
The comprehensive allotment coefficient Di of interlayer is interlayer formation capacity factor percentage Ai, moisture content influences interlayer correction factor
The product of Bi, effect of saturation degree correction factor tri- coefficients of Ci:
Di=Ai × Bi × Ci
I=1~n oil well production number of plies, n are positive integer；
In steps of 5, according to the reasonable Liquid output calculated result of individual well, layering point is acquired using the comprehensive allotment coefficient Di of interlayer
Liquid measure size QLI:
OLI=QL×Di
QLThe total reasonable Liquid output of the full well of-individual well；
In step 6, corresponding with practical oil well according to the principle centered on oil well on the basis of being layered liquid separation amount result
Well acquires average staturation between oil-water well, splits layering liquid measure with saturation degree proportional relationship and assigns to corresponding well.
The purpose of the present invention can be also achieved by the following technical measures:
In step 7, it centered on well, seeks well and corresponds to oil well getting layering the sum of liquid measure, liquid measure will be layered
The sum of be multiplied with injection-production rati-o obtain layering Water injection rate water；It can be further by each multi-zone flow regulating water addition of well
Full well is obtained with water injection rate.
The well concocting method based on multifactor raising offshore oilfield interlayer use rate in the present invention, technical thought are clear
Chu, using simple, provide practicable technical method to realize that marine oil reservoir high-speed and high-efficiency exploitation improves recovery ratio.The party
Method is adopted in allotment in triumph marine chengdao oilfield main body shop upper section oil reservoir injection and is applied, and successfully directs 32 according to this method
Mouth well saliva well note adopts allotment design.After implementing scene using this method, well water decline, the good effect that oil-producing rises are realized
Fruit achieves preferable economic benefit and social benefit.
Detailed description of the invention
Fig. 1 is of the invention one based on the multifactor well concocting method for improving offshore oilfield interlayer use rate specific
The flow chart of embodiment；
Fig. 2 is that saturation degree average value seeks the schematic diagram of the technique of painting between oil-water well in a specific embodiment of the invention；
Fig. 3 is that oil well corresponds to surrounding well liquid separation amount calculating schematic diagram in a specific embodiment of the invention.
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 well allotment sides of the invention based on multifactor raising offshore oilfield interlayer use rate
The flow chart of method.
In step 101, first from static parameter, each layer formation capacity (Kh) percentage of each oil well is calculated, is asked
Obtain interlayer formation capacity factor percentage.
In step 102, based on numerical simulation operation result, each layer in each production profile of oil well is calculated
Moisture content size.
Interlayer correction factor determines under step 103, moisture content influence factor, according to each layer moisture content size with inverse proportion
Relationship corrects interlayer water distribution ratio.
In step 104, according to reservoir numerical simulation as a result, quantization well between each layer remaining oil how much, calculate oil-water well company
Line direction is averaged oil saturation size, acquires each layer with water injection rate amendment system according to saturation dimension Relationship of Coefficients in direct ratio
Number.
In step 105, the comprehensive allotment coefficient of interlayer is sought, i.e. interlayer formation capacity percentage, moisture content influences amendment system
The product of number, the several coefficients of effect of saturation degree correction factor.
In step 106, according to the reasonable Liquid output calculated result of individual well, layering liquid separation is acquired using the comprehensive allotment coefficient of interlayer
Measure size.
It is corresponding with practical oil well according to the principle centered on oil well on the basis of being layered liquid separation amount result in step 107
Layering liquid measure is split according to average staturation size between oil-water well with proportional relationship and assigns to corresponding well by well.
In step 108, centered on well, seek well and correspond to oil well getting layering the sum of liquid measure, according to Reasonable Injection
It adopts than being multiplied and obtaining to be layered Water injection rate water.
In step 109, each multi-zone flow regulating water addition of well can further be obtained into full well with water injection rate.
In an application specific embodiment of the invention, comprise the steps that
(1) the oil well static state geologic parameter from injection-production well group, calculates each oil well in the formation capacity Kh of longitudinal each layer,
Calculate each layer formation capacity factor percentage Ai formula are as follows:
Wherein, Ki --- i-th layer of formation effective permeability size, md；
Hi --- i-th layer of Effective thickness of formation size, m；
I=1~n oil well production number of plies, n are positive integer；
(2) based on numerical simulation operation result, the moisture content of each layer in each production profile of oil well is calculated
Size；
(3) interlayer correction factor Bi under moisture content influence factor is determined, according to each layer moisture content size with inversely prroportional relationship
Interlayer injection allocation water ratio is corrected, is fw1 in each layer moisture content, when fw2, fw3 ... fwn, then moisture content influences interlayer correction factor
Bi formula are as follows:
Wherein, fwi --- i-th layer of moisture content size；
I=1~n oil well production number of plies, n are positive integer；
(4) according to reservoir numerical simulation fitting result, how much quantify between oil-water well each layer remaining oil, according to oil-water well line
Water-drive control area is drawn out in direction, is calculated oil-water well line direction within this range and is averaged oil saturation size, and asks
Each layer effect of saturation degree correction factor Ci is obtained, corrects interlayer injection allocation water according to saturation dimension Relationship of Coefficients in direct ratio:
- oil well production layer oil-water well line direction is averaged oil saturation size；
I=1~n oil well production number of plies, n are positive integer；
(5) the comprehensive allotment coefficient Di of interlayer is interlayer formation capacity factor percentage Ai, moisture content influences interlayer amendment system
The product of number Bi, effect of saturation degree correction factor tri- coefficients of Ci:
Di=Ai × Bi × Ci
I=1~n oil well production number of plies, n are positive integer；
(6) according to the reasonable Liquid output calculated result of individual well, it is big that layering liquid separation amount is acquired using the comprehensive allotment coefficient Di of interlayer
Small QLI:
OLI=QL×Di
QLThe total reasonable Liquid output of the full well of-individual well；
(7) on the basis of being layered liquid separation amount result, according to the principle centered on oil well, well is corresponded to practical oil well, is asked
Average staturation between oil-water well, liquid measure will be layered with saturation degree proportional relationship split and assign to corresponding well.See Fig. 3；
(8) it centered on well, seeks well and corresponds to oil well getting layering the sum of liquid measure, the sum of liquid measure and conjunction will be layered
Reason injection-production ratio, which is multiplied, obtains layering Water injection rate water.
(9) each multi-zone flow regulating water addition of well can further be obtained into full well with water injection rate.
Claims (3)
1. the well concocting method based on multifactor raising offshore oilfield interlayer use rate, which is characterized in that should based on mostly because
The well concocting method of raising offshore oilfield interlayer use rate of element includes:
Step 1, from static parameter, interlayer formation capacity factor percentage is acquired；
Step 2, the moisture content size of each layer in each production profile of oil well is calculated；
Step 3, interlayer water distribution ratio is corrected with inversely prroportional relationship according to each layer moisture content size；
Step 4, interlayer effect of saturation degree correction factor and the comprehensive allotment coefficient of interlayer are sought；
Step 5, layering liquid separation amount size is acquired using the comprehensive allotment coefficient of interlayer；
Step 6, layering liquid measure is split with proportional relationship according to average staturation size between oil-water well and assigns to corresponding well；
Step 7, determine well layering Water injection rate water and Full water well with water injection rate；
In step 1, the oil well static state geologic parameter from injection-production well group calculates each oil well in the formation capacity of longitudinal each layer
Kh calculates each layer formation capacity factor percentage Ai formula are as follows:
Wherein, Ki --- i-th layer of formation effective permeability size, md；
Hi --- i-th layer of Effective thickness of formation size, m；
I=1~n oil well production number of plies, n are positive integer；
In step 2, based on numerical simulation operation result, the aqueous of each layer in each production profile of oil well is calculated
Rate size；
In step 3, it determines interlayer correction factor Bi under moisture content influence factor, is closed according to each layer moisture content size with inverse proportion
System's amendment interlayer injection allocation water ratio, is fw1 in each layer moisture content, and when fw2, fw3 ... fwn, then moisture content influences interlayer amendment system
Number Bi formula are as follows:
Wherein, fwi --- i-th layer of moisture content size；
I=1~n oil well production number of plies, n are positive integer；
In step 4, according to reservoir numerical simulation fitting result, how much quantify between oil-water well each layer remaining oil, according to oil-water well
Water-drive control area is drawn out in line direction, is calculated oil-water well line direction within this range and is averaged oil saturation size,
And each layer effect of saturation degree correction factor Ci is acquired, interlayer injection allocation water is corrected according to saturation dimension Relationship of Coefficients in direct ratio
Amount:
- oil well production layer oil-water well line direction is averaged oil saturation size；
I=1~n oil well production number of plies, n are positive integer；
The comprehensive allotment coefficient Di of interlayer is interlayer formation capacity factor percentage Ai, moisture content influences interlayer correction factor Bi, full
The product of tri- coefficients of correction factor Ci is influenced with degree:
Di=Ai × Bi × Ci
I=1~n oil well production number of plies, n are positive integer；
In steps of 5, according to the reasonable Liquid output calculated result of individual well, layering liquid separation amount is acquired using the comprehensive allotment coefficient Di of interlayer
Size QLI:
OLI=QL×Di
QLThe total reasonable Liquid output of the full well of-individual well；
In step 6, on the basis of being layered liquid separation amount result, according to the principle centered on oil well, well is corresponded to practical oil well,
Average staturation between oil-water well is acquired, liquid measure will be layered with saturation degree proportional relationship splits and assign to corresponding well.
2. the well concocting method according to claim 1 based on multifactor raising offshore oilfield interlayer use rate,
It is characterized in that, in step 7, centered on well, seeks well and correspond to oil well getting layering the sum of liquid measure, liquid measure will be layered
The sum of be multiplied with injection-production rati-o obtain layering Water injection rate water.
3. the well concocting method according to claim 2 based on multifactor raising offshore oilfield interlayer use rate,
It is characterized in that, in step 7, each multi-zone flow regulating water addition of well can further be obtained into full well with water injection rate.
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| CN111456695A (en) * | 2019-01-21 | 2020-07-28 | 中国石油天然气股份有限公司 | Layered sandstone reservoir recovery method and device |
| CN111119815B (en) * | 2020-01-03 | 2022-07-26 | 中国石油化工股份有限公司 | Method for determining production well production allocation ratio through balanced displacement |
| CN114427397A (en) * | 2020-09-11 | 2022-05-03 | 中国石油化工股份有限公司 | Chemical flooding injection-production liquid amount determination method for refining to small layer and well group |
| CN112287279B (en) * | 2020-09-27 | 2023-12-26 | 中国石油天然气股份有限公司 | Residual oil prediction method and device |
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