CN106812508A - 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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- CN106812508A CN106812508A CN201510867379.0A CN201510867379A CN106812508A CN 106812508 A CN106812508 A CN 106812508A CN 201510867379 A CN201510867379 A CN 201510867379A CN 106812508 A CN106812508 A CN 106812508A
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- well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The present invention provides a kind of well concocting method based on multifactor raising offshore oilfield interlayer use rate, including：Step 1, from static parameter, tries to achieve interlayer formation capacity factor percentage；Step 2, statistical computation obtains the moisture content size of each layer in each production profile of oil well；Step 3, according to each layer moisture content size with inversely prroportional relationship amendment interlayer water distribution ratio；Step 4, asks for interlayer effect of saturation degree correction factor and interlayer comprehensively allotment coefficient；Step 5, using interlayer, comprehensively allotment coefficient tries to achieve layering point liquid measure size；Step 6, according to average staturation size between oil-water well with proportional relationship will be layered liquid measure split assign to correspondence well；Step 7, determines that well layering Water injection rate water and Full water well match somebody with somebody water injection rate.The well concocting method for being 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
Improve recovery ratio field the present invention relates to the exploitation of oil-gas reservoir high-speed and high-efficiency, more particularly to based on it is many because
How the well concocting method of interlayer use rate is improved using Research Numerical Simulation Techique under the conditions of element.
Background technology
China's offshore oil is ensconced and played an important role in oil development, and the marine chengdao oilfield of triumph is for I
State pole neritic area puts into the 1 year oil-producing megaton oil field of development ＆ construction, and the oil field is located at Bohai Sea
Bay south pole shallow sea area, sea conditions are complicated, and bad environments belong to offshore marginal oilfield, should
The exploitation in oil field is directly connected to the marine exploitation success or failure of triumph.There is offshore oilfield the tubing string life-span to limit
The features such as making, invest big, high-speed and high-efficiency exploitation is the key of the marine oil reservoir of exploitation.
In order to make full use of resource, the recovery ratio in the platform term of validity is improved, it is necessary to solve Cheng Dao first
Principal contradiction present in oil field development and problem, propose effect exploitation, in order to ensure development effectiveness,
Raising interlayer use rate must be then based oneself upon, development effectiveness and ultimate recovery is improved.
In order to improve oil reservoir interlayer use rate, with reference to the various factors in oil reservoir actual development, comprehensively examine
Consider the influence of each factor, improve interlayer reserves exploitation rate, improve well waterflooding development effect, this is to carry
The key element of waterflooding reservoir water flooding effectiveness high.Therefore, having invented the method, solve
In actual waterflooding reservoir, the well allotment side based on the raising interlayer use rate under the conditions of multifactor
Method.
The content of the invention
It is an object of the invention to provide one kind using Research Numerical Simulation Techique be based on it is multifactor under the conditions of
The well concocting method of interlayer use rate how is improved, is realized that offshore oil is ensconced in the platform term of validity and is realized
The target of high-speed and high-efficiency exploitation.
The purpose of the present invention can be achieved by the following technical measures：Based on multifactor raising offshore oil
The well concocting method of field interlayer use rate, should be based on multifactor raising offshore oilfield interlayer use rate
Well concocting method include：Step 1, from static parameter, tries to achieve interlayer formation capacity factor
Percentage；Step 2, statistical computation obtains the moisture content size of each layer in each production profile of oil well；Step
Rapid 3, according to each layer moisture content size with inversely prroportional relationship amendment interlayer water distribution ratio；Step 4, asks for
Interlayer effect of saturation degree correction factor and interlayer comprehensively allocate coefficient；Step 5, is comprehensively adjusted using interlayer
Distribution coefficient tries to achieve layering point liquid measure size；Step 6, according to average staturation size between oil-water well with just
Proportionate relationship will be layered liquid measure split assign to correspondence well；Step 7, determines that well is layered Reasonable water filling
Amount and Full water well match somebody with somebody water injection rate.
The purpose of the present invention can also be achieved by the following technical measures：
In step 1, the oil well static state geologic parameter from injection-production well group, calculates each oil well vertical
To the formation capacity Kh of each layer, calculating each layer formation capacity factor percentage Ai formula is：
Wherein, Ai --- stratified formations coefficient percentage, %；
Ki --- each layer formation effective permeability size, md；
Hi --- each layer Effective thickness of formation size, m；
I=1~oil well production the number of plies.
In step 2, based on numerical simulation operation result, statistical computation obtains each oil well output
The moisture content size of each layer in section.
In step 3, interlayer correction factor Bi under moisture content influence factor is determined, it is aqueous according to each layer
Rate size is in each layer moisture content with inversely prroportional relationship amendment interlayer injection allocation water ratio
When fw1, fw2, fw3 ... fwi, then moisture content influence interlayer correction factor Bi formula are：
Wherein, Ai --- stratified formations coefficient percentage, %；
Fwi --- separated layer water cut size, f；
I=1~oil well production the number of plies.
In step 4, according to reservoir numerical simulation fitting result, each layer remaining oil between oil-water well is quantified
How much, Water-drive control area is drawn out according to oil-water well line direction, profit is calculated within this range
The average oil saturation size in well line direction, and each layer effect of saturation degree correction factor Ci is tried to achieve,
According to saturation dimension Relationship of Coefficients amendment interlayer injection allocation water in direct ratio：
The average oil saturation size in-oil well production layer oil-water well line direction, f；
I=1~oil well production the number of plies.
In step 4, comprehensively allotment coefficient Di is interlayer formation capacity factor percentage Ai, contains interlayer
Water rate influence interlayer correction factor Bi, the product of the several coefficients of effect of saturation degree correction factor Ci：
Di=Ai × Bi × Ci
I=1~oil well production the number of plies.
In steps of 5, according to the reasonable Liquid output result of calculation of individual well, coefficient is comprehensively allocated using interlayer
Di tries to achieve layering point liquid measure size QLi：
OLI=QL×Di
QLThe total rationally Liquid output of the full well of-individual well.
In step 6, on the basis of layering point liquid measure result, according to the principle centered on oil well, with
Actual oil well correspondence well, average staturation is small between trying to achieve oil-water well, will with saturation degree proportional relationship
Layering liquid measure is split and assigns to correspondence well.
In step 7, centered on well, ask for well correspondence oil well and get layering liquid measure sum,
It is multiplied and obtains to be layered Water injection rate water according to injection-production rati-o.
In step 7, each multi-zone flow regulating water of well being added can further obtain full well with water filling
Amount.
The well concocting method based on multifactor raising offshore oilfield interlayer use rate in the present invention,
Technical thought understands, using simple, provided to realize that marine oil reservoir high-speed and high-efficiency exploitation improves recovery ratio
Practicable technical method.The method is adopted in the marine chengdao oilfield main body shop epimere oil reservoir injection of triumph
Applied in allotment, 32 mouthfuls of well saliva well notes are successfully directed according to the method and adopts allotment design.Using
After the method implements scene, well water decline is realized, the good result that oil-producing rises is achieved
Preferable economic benefit and social benefit.
Brief description of the drawings
Fig. 1 is the well allotment side based on multifactor raising offshore oilfield interlayer use rate of the invention
The flow chart of one specific embodiment of method；
Fig. 2 is that saturation degree average value asks for showing for the technique of painting between oil-water well in a specific embodiment of the invention
It is intended to；
Fig. 3 is oil well correspondence surrounding well point liquid measure calculating signal in a specific embodiment of the invention
Figure.
Specific embodiment
It is cited below particularly to enable above and other objects, features and advantages of the invention to become apparent
Go out preferred embodiment, and coordinate shown in accompanying drawing, be described in detail below.
As shown in figure 1, Fig. 1 is of the invention based on multifactor raising offshore oilfield interlayer use rate
Well concocting method flow chart.
In step 101, first from static parameter, each each layer formation capacity (Kh) of oil well is calculated
Percentage, tries to achieve interlayer formation capacity factor percentage.
In step 102, based on numerical simulation operation result, statistical computation obtains each oil well output
The moisture content size of each layer in section.
Interlayer correction factor determines under step 103, moisture content influence factor, according to each layer moisture content
Size is with inversely prroportional relationship amendment interlayer water distribution ratio.
In step 104, according to reservoir numerical simulation result, how much quantify between well each layer remaining oil, meter
The average oil saturation size in oil-water well line direction is calculated, according to saturation dimension coefficient in direct ratio
Relation tries to achieve each layer with water injection rate correction factor.
In step 105, interlayer comprehensively allotment coefficient, i.e. interlayer formation capacity percentage, aqueous is asked for
Rate influence correction factor, the product of the several coefficients of effect of saturation degree correction factor.
In step 106, according to the reasonable Liquid output result of calculation of individual well, coefficient is comprehensively allocated using interlayer
Try to achieve layering point liquid measure size.
In step 107, on the basis of layering point liquid measure result, according to the principle centered on oil well, with
Actual oil well correspondence well, liquid will be layered according to average staturation size between oil-water well with proportional relationship
Amount is split and assigns to correspondence well.
In step 108, centered on well, ask for well correspondence oil well and get layering liquid measure sum,
It is multiplied and obtains to be layered Water injection rate water according to injection-production rati-o.
In step 109, each multi-zone flow regulating water of well is added can further obtain full well with water filling
Amount.
In an application specific embodiment of the invention, following steps are included：
(1) the oil well static state geologic parameter from injection-production well group, calculates each oil well in each layer in longitudinal direction
Formation capacity (Kh), calculating each layer formation capacity percentage Ai formula is；
(i=1~oil well production number of plies)
Wherein, Ai --- stratified formations coefficient percentage, %；
Ki --- each layer formation effective permeability size, md；
Hi --- each layer Effective thickness of formation size, m.
(2) based on numerical simulation operation result, statistical computation is obtained in each production profile of oil well
The moisture content size fwi of each layer；
(3) interlayer correction factor Bi under moisture content influence factor is determined, according to each layer moisture content size
With inversely prroportional relationship amendment interlayer injection allocation water ratio, such as each layer moisture content be fw1, fw2, fw3 ... fwi,
Then moisture content influence interlayer correction factor Bi formula are：
(i=1~oil well production number of plies)
Wherein, Ai --- stratified formations coefficient percentage, %；
Fwi --- separated layer water cut size, f；
(4) according to reservoir numerical simulation fitting result, each layer remaining oil is how much between quantization oil-water well,
Water-drive control area is drawn out according to oil-water well line direction, Fig. 2 is seen, calculates fuel-displaced within this range
The average oil saturation size in well line direction, and each layer is tried to achieve with water injection rate correction factor Ci,
According to saturation dimension Relationship of Coefficients amendment interlayer injection allocation water in direct ratio；
(i=1~oil well production number of plies)
The average oil saturation size in-oil well production layer oil-water well line direction, f.
(5) interlayer comprehensively allotment coefficient, i.e. interlayer formation capacity percentage, moisture content influence are asked for
The product of correction factor, the several coefficients of effect of saturation degree correction factor；
Di=Ai × Bi × Ci (i=1~oil well production number of plies)
(6) according to the reasonable Liquid output result of calculation of individual well, using interlayer, comprehensively allotment coefficient is tried to achieve point
Layer point liquid measure size QLi；
OLI=QL×Di
QLThe total rationally Liquid output of the full well of-individual well.
(7) on the basis of layering point liquid measure result, according to the principle centered on oil well, with actual oil
Well correspondence well, average staturation is small between trying to achieve oil-water well according to step 4 method, with saturation degree direct ratio
Example relation will be layered liquid measure split assign to correspondence well, see Fig. 3；
(8) centered on well, ask for well correspondence oil well and get layering liquid measure sum, according to
Injection-production rati-o is multiplied and obtains being layered Water injection rate water；
(9) being added each multi-zone flow regulating water of well can further obtain full well with water injection rate.
Claims (10)
1. based on the multifactor well concocting method for improving offshore oilfield interlayer use rate, its feature
It is that the well concocting method that should be based on multifactor raising offshore oilfield interlayer use rate includes：
Step 1, from static parameter, tries to achieve interlayer formation capacity factor percentage；
Step 2, statistical computation obtains the moisture content size of each layer in each production profile of oil well；
Step 3, according to each layer moisture content size with inversely prroportional relationship amendment interlayer water distribution ratio；
Step 4, asks for interlayer effect of saturation degree correction factor and interlayer comprehensively allotment coefficient；
Step 5, using interlayer, comprehensively allotment coefficient tries to achieve layering point liquid measure size；
Step 6, will be layered liquid measure and split point according to average staturation size between oil-water well with proportional relationship
To correspondence well；
Step 7, determines that well layering Water injection rate water and Full water well match somebody with somebody water injection rate.
2. according to claim 1 based on the multifactor water for improving offshore oilfield interlayer use rate
Well concocting method, it is characterised in that in step 1, the oil well static state geologic parameter from injection-production well group
Set out, calculate formation capacity Kh of each oil well in each layer in longitudinal direction, calculate each layer formation capacity factor hundred
Divide and be than Ai formula：
Wherein, Ai --- stratified formations coefficient percentage, %；
Ki --- each layer formation effective permeability size, md；
Hi --- each layer Effective thickness of formation size, m；
I=1~oil well production the number of plies.
3. according to claim 1 based on the multifactor water for improving offshore oilfield interlayer use rate
Well concocting method, it is characterised in that in step 2, based on numerical simulation operation result, system
It is calculated the moisture content size of each layer in each production profile of oil well.
4. according to claim 1 based on the multifactor water for improving offshore oilfield interlayer use rate
Well concocting method, it is characterised in that in step 3, determines interlayer amendment under moisture content influence factor
Coefficient B i, according to each layer moisture content size with inversely prroportional relationship amendment interlayer injection allocation water ratio, each
Layer moisture content is fw1, and when fw2, fw3 ... fwi, then moisture content influences interlayer correction factor Bi formula
For：
Wherein, Ai --- stratified formations coefficient percentage, %；
Fwi --- separated layer water cut size, f；
I=1~oil well production the number of plies.
5. according to claim 1 based on the multifactor water for improving offshore oilfield interlayer use rate
Well concocting method, it is characterised in that in step 4, according to reservoir numerical simulation fitting result, amount
Each layer remaining oil is how much between carburetion well, and Water-drive control area is drawn out according to oil-water well line direction,
The average oil saturation size in oil-water well line direction is calculated within this range, and tries to achieve each layer saturation
Degree influence correction factor Ci, according to saturation dimension Relationship of Coefficients amendment interlayer injection allocation water in direct ratio
Amount：
The average oil saturation size in-oil well production layer oil-water well line direction, f；
I=1~oil well production the number of plies.
6. according to claim 1 based on the multifactor water for improving offshore oilfield interlayer use rate
Well concocting method, it is characterised in that in step 4, comprehensively allotment coefficient Di is interlayer stratum to interlayer
Coefficient factor percentage Ai, moisture content influence interlayer correction factor Bi, effect of saturation degree correction factor
The product of the several coefficients of Ci：
Di=Ai × Bi × Ci
I=1~oil well production the number of plies.
7. according to claim 1 based on the multifactor water for improving offshore oilfield interlayer use rate
Well concocting method, it is characterised in that in steps of 5, according to the reasonable Liquid output result of calculation of individual well,
Using interlayer, comprehensively allotment coefficient Di tries to achieve layering point liquid measure size QLi：
OLI=QL×Di
QLThe total rationally Liquid output of the full well of-individual well.
8. according to claim 1 based on the multifactor water for improving offshore oilfield interlayer use rate
Well concocting method, it is characterised in that in step 6, on the basis of layering point liquid measure result, according to
Principle centered on oil well, with actual oil well correspondence well, average staturation is small between trying to achieve oil-water well,
With saturation degree proportional relationship will be layered liquid measure split assign to correspondence well.
9. according to claim 1 based on the multifactor water for improving offshore oilfield interlayer use rate
Well concocting method, it is characterised in that in step 7, centered on well, asks for well correspondence oil
Well gets layering liquid measure sum, is multiplied and obtains to be layered Water injection rate water according to injection-production rati-o.
10. according to claim 9 based on multifactor raising offshore oilfield interlayer use rate
Well concocting method, it is characterised in that in step 7, be by each multi-zone flow regulating water addition of well
Full well can further be obtained with water injection rate.
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| CN111119815A (en) * | 2020-01-03 | 2020-05-08 | 中国石油化工股份有限公司 | Method for determining production well production allocation ratio through balanced displacement |
| 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 |
| CN112287279A (en) * | 2020-09-27 | 2021-01-29 | 中国石油天然气股份有限公司 | Residual oil prediction method and device |
| 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 |
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| 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 |
| CN112287279A (en) * | 2020-09-27 | 2021-01-29 | 中国石油天然气股份有限公司 | Residual oil prediction method and device |
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