CN105989225B - A kind of organic base ternary system glues dense relationship description method - Google Patents
A kind of organic base ternary system glues dense relationship description method Download PDFInfo
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- CN105989225B CN105989225B CN201510070803.9A CN201510070803A CN105989225B CN 105989225 B CN105989225 B CN 105989225B CN 201510070803 A CN201510070803 A CN 201510070803A CN 105989225 B CN105989225 B CN 105989225B
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Abstract
The present invention provides a kind of organic base ternary system and glues dense relationship description method, which glues dense relationship description method and include：Step 1, test data is obtained；Step 2, equation parameter is asked for using least square method recurrence；And step 3, viscosity descriptive model is established according to the equation parameter acquired.The organic base ternary system, which glues dense relationship description method, to be helped to go deep into the mechanism of oil displacement of understanding organic base ternary composite driving, and organic base three-component compound system is instructed to improve the optimization of recovery ratio.The principle of the present invention describes science, accurate, has preferable promotional value.
Description
Technical field
The present invention relates to oil-gas field developments to improve oil recovery field, especially relates to a kind of organic base ternary system
Glue dense relationship description method.
Background technology
As SHENGLI PETROLEUM AREA main force oil field steps into the ultra-high water-containing stage, chemical displacement of reservoir oil technology becomes old filed significantly
Improve one of dominant technology of recovery ratio.Ith, the high-quality chemical flooding resource mobility of II class finishes, and chemical flooding position is after IV class, poly- drive
And marine oil reservoir transfer, requirement to chemical agent also higher, difficulty bigger.Shengli Oil Field IV class chemical floodings resource reserve 1.14 ×
108T, such oil reservoir comprehensive water cut is high, and accumulation water-oil factor is high, and long-term injecting water is washed away so that part reservoir has formd fixed water
Circulation road injects water low effective circulation, it is necessary to carry out the research of combination of plugging and displacing mining type.Gudong crude oil acid value is high, is easy to and alkali
Petroleum soap is generated, is suitable for ternary composite driving, the western Ng5 in 7th areas of Gu Dong implemented in 19922+3Dense well spacing ternary composite driving guide tries
It tests and shows that ternary composite driving improves recovery ratio higher than binary combination flooding, but since injection liquid fouling and production fluid emulsification are serious
Problem, it is difficult to promote.Early-stage study show using organic base substitute inorganic base implement ternary composite driving can effectively solve fouling and
Emulsification problem, since the generation of petroleum soap causes system to have stronger washing oil ability, and organic base compared with binary composite displacement system
Have with polymer and cooperate with tackifying effect, the oil extraction methods of polymer are divided by using organic base+surfactant+superelevation, in advance
Meter can improve more than 10% recovery ratio.How the driving mechanism of this oil displacement system is accurately described, quantification area split is each
The influence of physico-chemical parameter needs to establish organic base ternary composite driving materialization mechanism description model.It not yet sends out both at home and abroad at present
The method that organic base ternary composite displacement system glues dense relationship is now described.We have invented a kind of new organic base ternary systems thus
Dense relationship description method is glued, solves more than technical problem.
Invention content
Contribute to go deep into understanding organic base ternary built composite reservoir oil displacement mechanism the object of the present invention is to provide one kind, guidance is organic
The organic base ternary system of alkali three-component compound system optimization glues dense relationship description method.
The purpose of the present invention can be achieved by the following technical measures：Organic base ternary system glues dense relationship description method,
The organic base ternary system is glued dense relationship description method and is included：Step 1, test data is obtained；Step 2, least square method is utilized
Equation parameter is asked in recurrence；And step 3, viscosity descriptive model is established according to the equation parameter acquired.
The purpose of the present invention can be also achieved by the following technical measures：
In step 1, neat polymer solution viscosity and at least four groups different organic alkali concns are measured with laboratory test
Under the conditions of organic base, polymer and surfactant solution viscosity data.
In step 2, cubic polynomial Numerical regression is carried out using least square method, acquires equation parameter.
In step 3, by the equation parameter ao of acquisition1、ao2、ao3、ao4Substitute into organic base three-component compound system viscosity, mu with
Organic base concentration CaoThe viscosity calculations formula of compound display relationships more three times：
In formula：
μ is the viscosity of organic base and polymer solution system, mPa.s；CaoFor the concentration of organic base, mg/L；ao1、ao2、
ao3、ao4Respectively viscosity parameter, (mg/L)-3、(mg/L)-2、(mg/L)-1、mg/L；μpFor polymer solution viscosity, mPa.s；
In above formula：
μwFor the viscosity of water, mPa.s；C41For the concentration of polymer in solution, mg/L；CsepFor formation water salinity, mg/
L；Sp is viscosity parameter, dimensionless；ap3、ap2、ap1Respectively viscosity parameter, (mg/L)-3、(mg/L)-2、(mg/L)-1。
In step 3, the viscosity calculations formula acquired using recurrence, asks for the ternary composite driving oil body under similar organic base
It is the viscosity data under any concentration.
Organic base ternary system in the present invention glues dense relationship description method, is advised according to the basic seepage flow of ternary composite driving
Rule introduces organic base to aqueous viscosity affecting parameters, establishes the mathematical model of description organic base ternary composite driving viscosity, propose
Description method of the organic base to viscosity influence.This method helps to go deep into the mechanism of oil displacement of understanding organic base ternary composite driving,
Organic base three-component compound system is instructed to improve the optimization of recovery ratio.The principle of the present invention describes science, accurate, has and preferably pushes away
Wide value.
Description of the drawings
Fig. 1 is the flow chart that the organic base ternary system of the present invention glues a specific embodiment of dense relationship description method；
Fig. 2 is the indoor experimental data statistical results chart in the specific embodiment of the present invention.
Specific embodiment
For enable the present invention above and other objects, features and advantages be clearer and more comprehensible, it is cited below particularly go out preferable implementation
Example, and coordinate institute's accompanying drawings, it is described in detail below.
(1) viscosity change in porous media is tied up to for description organic base ternary complex, glues dense equation in polymer
On the basis of, increase influence of the organic base to viscosity in ternary system.Reflect the ability that organic alkali systems influence viscosity.
(2) it is counted and found by indoor experimental data, organic base three-component compound system viscosity, mu and organic base concentration CaoIt is compound
More display relationships three times.
In formula：
μ is the viscosity of organic base and polymer solution system, mPa.s；CaoFor the concentration of organic base, mg/L；ao1、ao2、
ao3、ao4Respectively viscosity parameter, (mg/L)-3、(mg/L)-2、(mg/L)-1、mg/L；μpFor polymer solution viscosity, mPa.s.
In above formula：
μwFor the viscosity of water, mPa.s；C41For the concentration of polymer in solution, mg/L；CsepFor formation water salinity, mg/
L；Sp is viscosity parameter, dimensionless；ap3、ap2、ap1Respectively viscosity parameter, (mg/L)-3、(mg/L)-2、(mg/L)-1。
A specific embodiment of dense relationship description method is glued as shown in FIG. 1, FIG. 1 is organic base ternary system of the invention
Flow chart.
In step B1, to obtain neat polymer solution viscosity under a certain concentration and at least 4 groups of difference organic bases
The viscosity of concentration mixed liquor.Flow enters step B2.
In step B2, cubic polynomial Numerical regression is carried out using least square method, acquires parameter ao1、ao2、ao3、ao4。
Flow enters step B3.
In step B3, by parameter ao1、ao2、ao3、ao4Equation (1) is substituted into, so as to acquire the organic base three under any concentration
First composite displacement system glues dense relation data.
In application one embodiment of the invention, table 1 is that organic base influences laboratory test results to polymer viscosity.In table
Various types of polymer test concentrations are all 1500mg/L, as can be seen from the table, various with the difference of organic alkali concn
The viscosity of type polymer is also with changing.Pass through the processing to laboratory test results, it is established that organic base ternary is answered
The description method of zoarium system displacement phase viscosity.
Influence table of 1 organic base of table to polymer viscosity
Fig. 2 is the indoor experimental data statistical results chart in the specific embodiment of the present invention, as seen from Figure 2, is built
All more than 0.85, the method energy Efficient Characterization proposed in the present invention has for vertical description method and laboratory test results related coefficient
Machine alkali three-component compound system displacement phase viscosity, the numerical simulation technology that recovery ratio is improved for organic base three-component compound system are established
Basis.
Claims (4)
1. organic base ternary system glues dense relationship description method, which is characterized in that the organic base ternary system glues dense relationship description
Method includes：
Step 1, test data is obtained；
Step 2, equation parameter is asked for using least square method recurrence；And
Step 3, viscosity descriptive model is established according to the equation parameter acquired；
In step 3, by the equation parameter ao of acquisition1、ao2、ao3、ao4Substitute into organic base three-component compound system viscosity, mu with it is organic
Alkali concn CaoMeet the viscosity calculations formula of cubic polynomial relationship：
In formula：
μ is the viscosity of organic base and polymer solution system, mPa.s；CaoFor the concentration of organic base in solution, mg/L；ao1、ao2、
ao3、ao4Respectively organic base ternary composite displacement system viscosity parameter, unit：(mPa.s)·(mg/L)-3、(mPa.s)·(mg/
L)-2、(mPa.s)·(mg/L)-1、mPa.s；μpFor polymer solution viscosity, unit：mPa.s；
In above formula：
μwFor the viscosity of water, unit：mPa.s；C41For the concentration of polymer in solution, unit：mg/L；CsepFor water flooding mineralising
Degree, unit：mg/L；Sp is formation water salinity to the affecting parameters of Polymer Flooding viscosity, dimensionless；ap3、ap2、ap1Point
Not Wei Polymer Flooding viscosity parameter, unit：(mg/L)-3、(mg/L)-2、(mg/L)-1。
2. organic base ternary system according to claim 1 glues dense relationship description method, which is characterized in that in step 1,
The organic base under neat polymer solution viscosity and at least four groups of difference organic base concentration conditions is measured with laboratory test, is gathered
Close object and surfactant solution viscosity data.
3. organic base ternary system according to claim 1 glues dense relationship description method, which is characterized in that in step 2,
Cubic polynomial Numerical regression is carried out using least square method, acquires equation parameter.
4. organic base ternary system according to claim 1 glues dense relationship description method, which is characterized in that in step 3,
The viscosity calculations formula acquired using recurrence, asks for the viscosity under the ternary composite oil-displacing system any concentration under similar organic base
Data.
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| WO2006102042A1 (en) * | 2005-03-16 | 2006-09-28 | Baker Hughes Incorporated | Saponified fatty acids as breakers for viscoelastic surfactant-gelled fluids |
| CN103745082A (en) * | 2013-12-11 | 2014-04-23 | 中国石油化工股份有限公司 | Numerical simulation method for heterogeneous oil combination flooding system |
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| WO2006102042A1 (en) * | 2005-03-16 | 2006-09-28 | Baker Hughes Incorporated | Saponified fatty acids as breakers for viscoelastic surfactant-gelled fluids |
| CN103745082A (en) * | 2013-12-11 | 2014-04-23 | 中国石油化工股份有限公司 | Numerical simulation method for heterogeneous oil combination flooding system |
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| 亚熔盐法铬盐清洁生产工艺多元电解质水溶液基础物性研究;郭雅杰，;《中国优秀硕士学位论文全文数据库工程科技I辑（月刊）》;20110115(第01期);B023-82 * |
| 原油储库生产运行调度优化技术研究;周宏志,;《中国优秀硕士学位论文全文数据库工程科技I辑（月刊）》;20110615(第06期);B019-300 * |
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