CN106567703B - A kind of cloth hole optimization method of more radial hole auxiliary pressure breaks - Google Patents
A kind of cloth hole optimization method of more radial hole auxiliary pressure breaks Download PDFInfo
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- CN106567703B CN106567703B CN201610875279.7A CN201610875279A CN106567703B CN 106567703 B CN106567703 B CN 106567703B CN 201610875279 A CN201610875279 A CN 201610875279A CN 106567703 B CN106567703 B CN 106567703B
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- 239000004744 fabric Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005457 optimization Methods 0.000 title claims abstract description 14
- AFEHBIGDWIGTEH-AQRCPPRCSA-N semax Chemical compound C([C@H](NC(=O)[C@H](CCC(O)=O)NC(=O)[C@@H](N)CCSC)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N1[C@@H](CCC1)C(=O)NCC(=O)N1[C@@H](CCC1)C(O)=O)C1=CNC=N1 AFEHBIGDWIGTEH-AQRCPPRCSA-N 0.000 claims description 3
- 238000004088 simulation Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
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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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- E21B41/0092—
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- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sewing Machines And Sewing (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses the cloth hole optimization methods that a kind of more radial holes assist pressure break, include the following steps：Determine the fracture pattern under the conditions of different radial holes；The sweep area for simulating single crack is used in combination ellipse to carry out area fitting, total sweep area in the case of a plurality of major fracture is obtained by oval Concentric rotation；Calculate total sweep area.Sweep area and superposed simulation cracky sweep area of the present invention by using single crack in homogeneous reservoir, it is the pattern that evaluation criterion optimizes radial hole with cracky maximum sweep area synthesis, the foundation of optimal cloth hole scheme is provided for multiple cracking form.The present invention uses alternative pattern of the ellipse as single crack sweep area, simplifies the acquiring method of sweep area, different reservoir, fracture parameters can reach good fitting effect by adjusting the numerical value of oval major and minor axis, have flexibility, generality.
Description
Technical field
The present invention relates to the cloth hole optimization methods that a kind of more radial holes assist pressure break, belong to radial hole auxiliary pressure break skill
Art field.
Background technology
The both wings crack generated at present for conventional pressure break is mostly used " fracture condudtiviy " index and is evaluated, and the index is only
Suitable for evaluating the single crack reservoir, can not evaluate can generate cracky more radial hole auxiliary pressure breaks.For volume
The crack that pressure break generates is mostly used " reservoir reconstruction volume " index and is evaluated, and a large amount of reservoir fine fisssures can be opened when volume fracturing
Seam generates a large amount of secondary cracks, is not suitable for the evaluation of microcrack, the less a plurality of major fracture in secondary crack still.
Radial hole assists in fracturing technique, and a plurality of major fracture can be constructed along hole by the porous pattern of horizontal same layer
Eye Directional Extension, greatly improves reservoir available reserves, improves production capacity, therefore clearly more radial hole auxiliary pressure breaks are split
The interpretational criteria and cloth hole optimization method of slit state are of great significance.
Invention content
Based on above-mentioned technical problem, the present invention provides a kind of cloth hole optimization method of more radial hole auxiliary pressure breaks.
The adopted technical solution is that：
A kind of cloth hole optimization method of more radial hole auxiliary pressure breaks, includes the following steps：
A determines the fracture pattern under the conditions of different radial holes；
B simulates the sweep area in single crack, is used in combination ellipse to carry out area fitting, is obtained by oval Concentric rotation
Total sweep area in the case of a plurality of major fracture；
C calculates total sweep area
C1 eyelets phase angle isWhen two ellipses there are intersection point A (xA,yA)、B(xB,yB)、C(xC,yC)、D(xD,yD), two is ellipse
Intersection point E (x in circle overlapping region with X-axisE,0)、F(xF, 0), and two ellipses rotate correspondence there are center, then pass through ellipse
Following equation group can be obtained in equation：
In formula (1), a, b are respectively elliptical long and short axis values, and simultaneous above formula can acquire four intersection points of two ellipses
A, the specific coordinate of B, C, D；
C2 is according to ellipse area formula S=π ab it is found that the sweep area in each eyelet crack is identical in homogeneous reservoir, always
Sweep area is that the sum of the sweep area in each eyelet crack subtracts overlapping area, i.e.,
Se=nS- (n-1) Sr (2)
In formula (2), n is eyelet number, n >=2；
SrIntegration Solving can be passed through：
C3 simultaneous formula (1), formula (2) and formula (3) can acquire maximum total sweep area Semax, corresponding eyelet phase at this time
AngleIt is the cloth hole azimuth after optimization, under the conditions of porousTo optimize pattern.
Preferably, in step a：The fracture pattern refers to single major fracture or a plurality of major fracture.
Preferably, in step b：Ellipse is substituted using rectangle and carries out area fitting.
The method have the benefit that：
1, the present invention is by using sweep area of the single crack in homogeneous reservoir and superposed simulation is cracky involves
Area is the pattern that evaluation criterion optimizes radial hole with cracky maximum sweep area synthesis, is multiple cracking form
The foundation of optimal cloth hole scheme is provided.
2, the present invention uses alternative pattern of the ellipse as single crack sweep area, simplifies the side of seeking of sweep area
Method, different reservoir, fracture parameters can reach good fitting effect by adjusting the numerical value of oval major and minor axis, have flexibly
Property, generality.
Description of the drawings
Fig. 1 is monolete aspect graph；
Fig. 2 is multiple cracking aspect graph；
Fig. 3 is the schematic diagram that multiple cracking uses ellipse as the progress area fitting of crack sweep area.
Specific implementation mode
Sweep area and superposed simulation cracky spread area of the present invention by using single crack in homogeneous reservoir
Product is the pattern that evaluation criterion optimizes radial hole with cracky maximum sweep area synthesis.Below in conjunction with the accompanying drawings with
The invention will be further described for specific implementation mode：
A kind of cloth hole optimization method of more radial hole auxiliary pressure breaks, includes the following steps：
A application numerical simulation softwares determine fracture pattern (single major fracture or a plurality of master under the conditions of different radial holes
Crack), as shown in Figure 1 and Figure 2.
B application numerical simulation softwares simulate the sweep area in single crack, are used in combination ellipse to carry out area fitting, by ellipse
Circular shape concentric rotation obtains total sweep area in the case of a plurality of major fracture.As shown in figure 3, the left sides Fig. 3 are numerical simulation software
The area that oil saturation changes is defined as sweep area in top plan view, is intended by ellipse by analog result
It closes；Total sweep area in the case of a plurality of major fracture can be obtained by oval Concentric rotation, such as the right sides Fig. 3.
C calculates total sweep area
The phase angle in homogeneous formationUnder the conditions of carry out in porous eye auxiliary fracturing reform, overall sweep area is each hole
The superposition of sweep area when eye independent pressure break, then uniquely influence the variable of overall sweep area under conditions of determining other parameters
For eyelet phase angle
C1 eyelets phase angle isWhen two ellipses there are intersection point A (xA,yA)、B(xB,yB)、C(xC,yC)、D(xD,yD), two is ellipse
Intersection point E (x in circle overlapping region with X-axisE,0)、F(xF, 0), and two ellipses rotate correspondence there are center, then pass through ellipse
Following equation group can be obtained in equation：
In formula (1), a, b are respectively elliptical long and short axis values,For elliptic equation, x1、y1、x2、y2Respectively
Refer to 1,2 two elliptical coordinate), simultaneous above formula can acquire the specific coordinate of four intersection points A, B, C, D of two ellipses.
C2 is according to ellipse area formula S=π ab it is found that the sweep area in each eyelet crack is identical in homogeneous reservoir, always
Sweep area is that the sum of the sweep area in each eyelet crack subtracts overlapping area, i.e.,
Se=nS- (n-1) Sr (2)
In formula (2), n is eyelet number, n >=2；By taking same layer holes as an example, Se=S1+S2-Sr=2S-Sr；SrProduct can be passed through
Divide and solves：
Because of symmetric figure centered on oval overlay region in formula, therefore Y-axis positive axis area can only be sought by symmetry,
It is whole overlay region area after doubling.
C3 simultaneous formula (1), formula (2) and formula (3) can acquire maximum total sweep area Semax, corresponding eyelet phase at this time
AngleBe optimization after cloth hole azimuth namely same layer it is porous under the conditions of pattern, under the conditions of porousFor most
Optimizing pore arrangement mode, n are eyelet number.As under the conditions of four holesTo optimize pattern.
In above-mentioned steps：Rectangle can also be used and substitute ellipse progress area fitting, solution throughway is identical.
It takes or uses for reference prior art and can be realized in the part that do not addressed in aforesaid way.
It should be noted that under the introduction of this specification, any equivalent substitute side that those skilled in the art are made
Formula or obvious variant, should all be within protection scope of the present invention.
Claims (3)
1. a kind of cloth hole optimization method of more radial hole auxiliary pressure breaks, it is characterised in that include the following steps：
A determines the fracture pattern under the conditions of different radial holes；
B simulates the sweep area in single crack, and ellipse is used in combination to carry out area fitting, is obtained by oval Concentric rotation a plurality of
Total sweep area in the case of major fracture；
C calculates total sweep area
C1 eyelets phase angle isWhen two ellipses there are intersection point A (xA,yA)、B(xB,yB)、C(xC,yC)、D(xD,yD), two oval weights
Intersection point E (x in folded region with X-axisE,0)、F(xF, 0), and two ellipses rotate correspondence there are center, then pass through elliptic equation
Following equation group can be obtained：
In formula (1), a, b are respectively elliptical long and short axis values, x1、y1For one of them elliptical coordinate, x2、y2It is another ellipse
Round coordinate, simultaneous above formula can acquire the specific coordinate of four intersection points A, B, C, D of two ellipses；
C2 it is found that the sweep area in each eyelet crack is identical in homogeneous reservoir, always involves according to ellipse area formula S=π ab
Area is that the sum of the sweep area in each eyelet crack subtracts overlapping area, i.e.,
Se=nS- (n-1) Sr (2)
In formula (2), n is eyelet number, n >=2；
SrIntegration Solving can be passed through：
C3 simultaneous formula (1), formula (2) and formula (3) can acquire maximum total sweep area Semax, corresponding eyelet phase angle at this time
It is the cloth hole azimuth after optimization, under the conditions of porousTo optimize pattern.
2. a kind of cloth hole optimization method of more radial hole auxiliary pressure breaks according to claim 1, which is characterized in that step
In a：The fracture pattern refers to single major fracture or a plurality of major fracture.
3. a kind of cloth hole optimization method of more radial hole auxiliary pressure breaks according to claim 1, which is characterized in that step
In b：Ellipse is substituted using rectangle and carries out area fitting.
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| CN201610875279.7A CN106567703B (en) | 2016-10-08 | 2016-10-08 | A kind of cloth hole optimization method of more radial hole auxiliary pressure breaks |
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| CN201610875279.7A CN106567703B (en) | 2016-10-08 | 2016-10-08 | A kind of cloth hole optimization method of more radial hole auxiliary pressure breaks |
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|---|---|---|---|---|
| US5960371A (en) * | 1997-09-04 | 1999-09-28 | Schlumberger Technology Corporation | Method of determining dips and azimuths of fractures from borehole images |
| CN105178952A (en) * | 2015-09-09 | 2015-12-23 | 中国石油天然气股份有限公司 | Method and device for determining spacing of artificial fractures of horizontal well |
| CN105354639A (en) * | 2015-11-10 | 2016-02-24 | 中国石油天然气股份有限公司 | Full-cycle capacity prediction method and device for dense oil multi-medium coupling seepage |
| CN105370268A (en) * | 2015-10-23 | 2016-03-02 | 中国石油天然气集团公司 | Method and device of optimizing staged fracturing parameters of horizontal well |
| CN105625990A (en) * | 2014-10-30 | 2016-06-01 | 中国石油化工股份有限公司 | Method for mining shale oil by virtue of horizontal well through performing volume fracturing on reservoirs |
Family Cites Families (3)
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|---|---|---|---|---|
| RU2488146C2 (en) * | 2008-03-27 | 2013-07-20 | Предрилл Стрессиз Интернэшнл Пти. Лтд. | Predicting stress on investigated area |
| FR2967200A1 (en) * | 2010-11-10 | 2012-05-11 | IFP Energies Nouvelles | METHOD FOR CHARACTERIZING FRACTURE FRACTURE NETWORK AND METHOD FOR OPERATING IT |
| US8967262B2 (en) * | 2011-09-14 | 2015-03-03 | Baker Hughes Incorporated | Method for determining fracture spacing and well fracturing using the method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5960371A (en) * | 1997-09-04 | 1999-09-28 | Schlumberger Technology Corporation | Method of determining dips and azimuths of fractures from borehole images |
| CN105625990A (en) * | 2014-10-30 | 2016-06-01 | 中国石油化工股份有限公司 | Method for mining shale oil by virtue of horizontal well through performing volume fracturing on reservoirs |
| CN105178952A (en) * | 2015-09-09 | 2015-12-23 | 中国石油天然气股份有限公司 | Method and device for determining spacing of artificial fractures of horizontal well |
| CN105370268A (en) * | 2015-10-23 | 2016-03-02 | 中国石油天然气集团公司 | Method and device of optimizing staged fracturing parameters of horizontal well |
| CN105354639A (en) * | 2015-11-10 | 2016-02-24 | 中国石油天然气股份有限公司 | Full-cycle capacity prediction method and device for dense oil multi-medium coupling seepage |
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| 压裂水平井数值模拟理论与方法研究;单娴;《中国博士学位论文全文数据库，工程科技Ⅰ辑》;20150615(第6期);全文 * |
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Inventor after: Liu Xiaoqiang Inventor after: Zhang Kaiwen Inventor after: Qu Zhanqing Inventor after: Guo Tiankui Inventor after: Li Xiaolong Inventor after: Li Jianxiong Inventor after: Li Guannan Inventor after: Tian Yu Inventor after: Zhang Wei Inventor after: Tian Kehan Inventor before: Qu Zhanqing Inventor before: Zhang Kaiwen Inventor before: Li Xiaolong Inventor before: Guo Tiankui Inventor before: Li Jianxiong Inventor before: Liu Xiaoqiang Inventor before: Li Guannan Inventor before: Tian Yu Inventor before: Zhang Wei Inventor before: Tian Kehan |
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