CN1059010C - Method for integrally profile-controlling and water-plugging block - Google Patents

Method for integrally profile-controlling and water-plugging block Download PDF

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CN1059010C
CN1059010C CN97115100A CN97115100A CN1059010C CN 1059010 C CN1059010 C CN 1059010C CN 97115100 A CN97115100 A CN 97115100A CN 97115100 A CN97115100 A CN 97115100A CN 1059010 C CN1059010 C CN 1059010C
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value
profile control
block
water injection
water
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CN1173581A (en
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赵福麟
张贵才
周洪涛
李宜坤
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China University of Petroleum East China
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Abstract

A method for integrally regulating profile and blocking water for a block is mainly characterized in that pressure indexes PI of all water injection wells of the block are measured, and then the pressure indexes PI are used as decision parameters of problems related to the profile control and water blocking according to the magnitude of the pressure indexes PI. The method has strong operability, wide decision-making range and quick decision-making, and can make multiple decisions on the overall profile control and water plugging repeated construction of the block.

Description

A kind of method that is used for block is carried out the integral profile control water blockoff
The present invention relates to a kind of method that is used for block is carried out the integral profile control water blockoff, it belongs to, and formulation and the enforcement to oil field profile control and water plugging scheme provides a kind of effective decision-making technique in the Oil-Gas Field Development Engineering.It mainly is to adopt the pressure index method to determine the significant problem of the block integral profile control water blockoff parties concerned.
In Oil-Gas Field Development Engineering, profile control and water plugging technology is important means and the measure that improves oil recovery factor.Profile control and water plugging technology has developed into the block integral profile control water blockoff stage gradually by the corresponding profile control and water plugging stage of oil-water well of oil well individual well water blockoff stage, well individual well profile control stage, well group.Up to the present still there is not the especially effectively square problem that solves the integral profile control water blockoff of oil field block.In order to make profile control and water plugging become the important measures that improve oil recovery factor, must in block integral, carry out, so want to make profile control and water plugging embody organic conception, and form the center of other comprehensive regulation, one cover way of decision profile control and water plugging significant problem just must be arranged, and this way must be able to solve the problem of 6 aspects in the block integral profile control water blockoff: 1. differentiate block profile control necessity; 2. need on the block to determine the well of profile control and water plugging; 3. the blocking agent of selecting to be fit to is used for profile control and water plugging; 4. calculate the consumption of blocking agent; 5. evaluation effect; 6. decision time of repeating to construct.
Purpose of the present invention provides a kind of brand-new method that is used for block is carried out the integral profile control water blockoff with regard to being to solve of the prior art above-mentioned 6 big practical problems, its major technique characteristics are when block is carried out the integral profile control water blockoff, its operation specifically should comprise the following steps: (1). at first measure the falloff curve of the well head of the whole water injection wells of block, and by the every mouthful of water injection well pressure drop that records
Curve calculates each mouthful water injection well in the closed-in time by the definition of following PI value and appointment
The PI value: PI = ∫ 0 t p ( t ) dt t ,
In the formula, PI is the pressure index (Mpa) of water injection well; P (t) is the tubing pressure (Mpa) behind the water injection well closed-in time t; T is the closed-in time; (2). by two standards the necessity of block profile control is judged:
1.. block mean P I value: block mean P I value is more little to need profile control more, if block mean P I
Value is lower than 10Mpa, and then this block needs profile control;
2.. the PI value extreme difference of block water injection well: PI value extreme difference is meant the maximum value of block water injection well PI value
Poor with minimum value, the big more profile control that needs more of its value, PI value extreme difference surpasses 5Mpa, then should the district
Piece needs profile control;
The block that meets above-mentioned any one standard or meet two standards simultaneously all must carry out profile control; (3). press block mean P I value and water injection well PI value and select profile control well and water injection well, it is flat to select to be lower than block
All the water injection well of PI value is a profile control well, and the water injection well that selection is higher than block mean P I value is augmented injection
Well, near block mean P I value, a little more than or a little less than the water injection well of mean P I value for not locating
The reason well; (4). select the type of profile control agent to carry out profile control; (5). select to repeat the time of profile control and water plugging construction.
In the above-mentioned said method that is used for block is carried out the integral profile control water blockoff, the physical parameter of its pressure index PI value and stratum and fluid has following relation:
In the formula, q is a water injection well day fluence; μ is a fluid dynamic viscosity; K is an in-place permeability; H is a formation thickness; r eIt is the water injection well Control Radius; is a formation porosity; C is a system compressibility; T is the closed-in time.
In the described said method, the consumption of its profile control agent depends on the predetermined improvement value of water injection well pressure index value, with flow factor and formation thickness, its profile control agent be to calculate by following formula with flow factor by the injection test result: β = W h f ΔP I ′
In the formula, β uses flow factor; W is the profile control agent consumption; h fIt is the water filling layer thickness; Δ PI ' is the variation of PI value before and after the injection test profile control agent.
Come enumeration technical characterstic of the present invention below in conjunction with embodiment.
In practical operation and implementing, designer of the present invention realizes the decision-making of block integral profile control water blockoff as follows, that is: 1. decision parameters PI values obtains
Measure the well head falloff curve of whole water injection wells on the block, and curve calculates the PI value of water injection well by the following PI value defined formula and the closed-in time of appointment thus: PI = ∫ 0 t p ( t ) dt t In the formula, PI is the pressure index (Mpa) of water injection well; P (t) is the tubing pressure (Mpa) behind the water injection well closed-in time t; T is the closed-in time.2. the judgement of block profile control necessity
By two standards the necessity of block profile control is judged 1. block mean P I value: the more little profile control that needs more of block mean P I value, the block of the low 10Mpa of average PI value needs profile control.2. the PI value extreme difference of block water injection well: PI value extreme difference is meant the poor of the maximum value of block water injection well PI value and minimum value, and the big more profile control that needs more of its value generally is that the block that PI value extreme difference surpasses 5Mpa needs profile control.
Usually, meet necessity that one of them or the block that meets two standards simultaneously all have profile control.3. profile control well is selected
It is selected to press block mean P I value and water injection well PI value.The water injection well that normally is lower than block mean P I value is a profile control well, and the water injection well that is higher than block mean P I value is the augmented injection well, near block mean P I value, a little more than or a little less than the water injection well of mean P I value for not handling well.4. the selection of profile control agent
The selection of water injection well profile control agent is that routinely 4 standards are carried out, i.e. the PI value and the cost of the salinity of formation temperature, formation water, water injection well.5. the calculating of profile control agent consumption:
Calculate the consumption of profile control agent by following three steps, promptly 1. determine the prescription of profile control agent.2. the flow factor of using by the following formula definition is calculated in the profile control agent injection test: β = W h f Δ PI ′ In the formula, β uses flow factor; W is the profile control agent consumption; h fIt is the water filling layer thickness; Δ PI ' is the variation of PI value before and after the injection test profile control agent.3. by the formal consumption of constructing of consumption coefficient calculations profile control agent:
W=βh fΔPI
In the formula, Δ PI is the predetermined 6. evaluation of profile control effect of improvement value (MPa) of water injection well PI value before and after the profile control
The foundation of its evaluation mainly is a 1. water injection well well head falloff curve; 2. injection IPR curve; 3. profile-log of water injection; 4. WATER DISPLACEMENT CURVES; 5. the production curve of tracer before and after the profile control; 6. the production curve of oil well and block (day production fluid, composite water cut and day produce oil).7. repeat the decision of engineering time
Because profile control agent moves into the stratum, the plugging action of near wellbore zone is reduced, then curve descends.It is that the PI value reduces that curve descends.When PI value before the PI value is decreased to profile control or a certain rational designated value, be the time that repeats to construct.8. 1. water blockoff oil well selected of the decision-making of oilwell water shutoff: the water blockoff oil well by production capacity, high moisture, be in low PI value zone (from distinguishing
Piece PI value isopleth map is found out) etc. condition selected.2. the selection of water shutoff agent: water shutoff agent is pressed salinity, the oil well PI value of living in of formation temperature, formation water
Zone and condition such as cost select.3. the water shutoff agent consumption is definite: by w=β ' h tCalculate.β ' is the water shutoff agent flow factor in the formula,
Its value is at 2~20m 3The scope of/m (stratum).Concrete β ' value should be with reference to the construction with condition
Selecting of oil well.4. the evaluation of water plugging effect: can comment by the production profile of oil well before and after the water blockoff and the variation of production curve
Valency.5. repeat determining of engineering time: by the variation decision of production curve.
Decision-making technique of the present invention is implemented the block (20) in some oil field, has all obtained good effect.That this technology is compared with the profile control and water shutoff method of prior art is workable, decision-making face width, decision-making rapidly, and can repeat construction to the block integral profile control water blockoff and repeatedly make a strategic decision, so this technology is specially adapted to the block integral profile control water blockoff is made a strategic decision.

Claims (3)

1. method that is used for block is carried out the integral profile control water blockoff, it is characterized in that this method comprises the following steps: (1). at first measure the falloff curve of the well head of the whole water injection wells of block, and calculate the PI value of each mouthful water injection well by the every mouthful of water injection well falloff curve that records by closed-in time of the definition of following PI value and appointment: PI = ∫ 0 t p ( t ) dt t ,
In the formula, PI is the pressure index (Mpa) of water injection well; P (t) is the tubing pressure (Mpa) behind the water injection well closed-in time t; T is the closed-in time; (2). by two standards the necessity of block profile control to be judged: 1.. block mean P I value: block mean P I value is more little to need profile control more, if block mean P I value is lower than 10Mpa, then this block needs profile control; 2.. the PI value extreme difference of block water injection well: PI value extreme difference is meant the poor of the maximum value of block water injection well PI value and minimum value, the big more profile control that needs more of its value, PI value extreme difference surpasses 5Mpa, and then this block needs profile control;
The block that meets above-mentioned any one standard or meet two standards simultaneously all must carry out profile control; (3). press block mean P I value and water injection well PI value and select profile control well and water injection well, select to be lower than block
The water injection well of mean P I value is a profile control well, selects to be higher than the water injection well of block mean P I value for increasing
Annotate well, near block mean P I value, a little more than or a little less than the water injection well of mean P I value be
Do not handle well; (4). select the type of profile control agent to carry out profile control; (5). select to repeat the time of profile control and water plugging construction.
2. the method that is used for block is carried out the integral profile control water blockoff according to claim 1 is characterized in that the physical parameter of pressure index PI value and stratum and fluid has following relation:
Figure C9711510000022
In the formula, q is a water injection well day fluence; μ is a fluid dynamic viscosity; K is an in-place permeability; H is a formation thickness; r eIt is the water injection well Control Radius; is a formation porosity; C is a system compressibility; T is the closed-in time.
3. the method that is used for block is carried out the integral profile control water blockoff according to claim 1, the consumption that it is characterized in that profile control agent depends on the predetermined improvement value of water injection well pressure index value, with flow factor and formation thickness, its profile control agent be to calculate by following formula with flow factor by the injection test result: β = W h f ΔP I ′
In the formula, β uses flow factor; W is the profile control agent consumption; h fIt is the water filling layer thickness; Δ PI ' is the variation of PI value before and after the injection test profile control agent.
CN97115100A 1997-08-06 1997-08-06 Method for integrally profile-controlling and water-plugging block Expired - Fee Related CN1059010C (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
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CN1295422C (en) * 2001-08-27 2007-01-17 石油大学(华东) Edge water scheduling technique for oil field using edge water to displace oil
CN105868558A (en) * 2016-03-29 2016-08-17 中国石油天然气股份有限公司 Method for evaluating profile control injectability of water injection well
CN106874666A (en) * 2017-02-10 2017-06-20 中国石油天然气股份有限公司 Method for judging whether water injection well is acidified on line and acidification degree
CN107794285A (en) * 2016-08-30 2018-03-13 中国石油化工股份有限公司 A kind of preparation method and application of displacement of reservoir oil biopolymer

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CN1079484C (en) * 1999-08-19 2002-02-20 白云渡 Section regulation process for interrupted water-injection depth of water injection well
CN102606119B (en) * 2012-02-07 2014-08-06 中国石油天然气股份有限公司 Fixed-point gel-placing water-blocking profile control agent and use method thereof
CN103075142B (en) * 2013-01-14 2016-06-22 中国石油大学(华东) A kind of waterflooding oil field water blockoff oil well well choosing method
CN103244087B (en) * 2013-05-21 2016-01-20 中国石油大学(北京) A kind of low-permeability oil deposit profile control and water plugging selects well decision-making technique
CN103291265A (en) * 2013-06-24 2013-09-11 西南石油大学 Method for judging full profile control degree of water injection well
CN103643928B (en) * 2013-11-21 2016-05-11 中国海洋石油总公司 A kind of depth profile control method step by step based on pressure field and velocity field distribution
CN103867188B (en) * 2014-03-14 2017-03-22 山东石大油田技术服务股份有限公司 Decision method used for profile control of oil-field water injection well
CN106351625B (en) * 2015-07-17 2021-01-29 中国石油化工股份有限公司 Dynamic system analysis method for oilfield flooding development
CN105715238A (en) * 2015-12-01 2016-06-29 山东石大油田技术服务股份有限公司 Real time monitoring and controlling method for displacement pressure gradient of waterflooding development oil reservoir
CN106761618A (en) * 2016-12-26 2017-05-31 中国石油天然气股份有限公司 Method and device for determining profile control dosage for water injection well
CN107355200B (en) * 2017-09-08 2020-03-03 北京科技大学 Method for improving water drive well selection by nano-micron particle dispersion system
CN108590571A (en) * 2018-03-27 2018-09-28 中国石油天然气股份有限公司 Method for determining dosage of profile control agent of low-permeability fractured water-breakthrough reservoir for water injection well

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US4915170A (en) * 1989-03-10 1990-04-10 Mobil Oil Corporation Enhanced oil recovery method using crosslinked polymeric gels for profile control
US4964461A (en) * 1989-11-03 1990-10-23 Mobil Oil Corporation Programmed gelation of polymers using melamine resins
US5103909A (en) * 1991-02-19 1992-04-14 Shell Oil Company Profile control in enhanced oil recovery

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1295422C (en) * 2001-08-27 2007-01-17 石油大学(华东) Edge water scheduling technique for oil field using edge water to displace oil
CN105868558A (en) * 2016-03-29 2016-08-17 中国石油天然气股份有限公司 Method for evaluating profile control injectability of water injection well
CN107794285A (en) * 2016-08-30 2018-03-13 中国石油化工股份有限公司 A kind of preparation method and application of displacement of reservoir oil biopolymer
CN106874666A (en) * 2017-02-10 2017-06-20 中国石油天然气股份有限公司 Method for judging whether water injection well is acidified on line and acidification degree

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