CN105003246A - Method for determining horizontal well fracture number - Google Patents
Method for determining horizontal well fracture number Download PDFInfo
- Publication number
- CN105003246A CN105003246A CN201410154468.6A CN201410154468A CN105003246A CN 105003246 A CN105003246 A CN 105003246A CN 201410154468 A CN201410154468 A CN 201410154468A CN 105003246 A CN105003246 A CN 105003246A
- Authority
- CN
- China
- Prior art keywords
- fractures
- horizontal well
- production
- fracture
- carries out
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The present invention provides a method for determining the horizontal well fracture number. The method comprises a first step of determining a range of a survey region and carrying out regional assignment on a surveyed mesh; a second step of carrying out unstructured mesh encryption on the survey region to set encryption mesh directions and assigning the fracture mesh; a third step of carrying out numerical simulation to obtain single horizontal well yields corresponding to different fracture numbers; a fourth step of performing a dimensionless treatment on horizontal well yields to obtain an influence comparison diagram of the fracture number to a recovery efficiency, and a fifth step of determining a reasonable fracture number by combining the dimensionless yield corresponding to the fracture number and contribution of many years of cumulative oil. The method provided by the present invention is targeted at specific oil deposits, and after the position of a horizontal segment and the direction of the horizontal well are determined, the reasonable fracture number is determined to ensure economic efficiency maximization.
Description
Technical field
The present invention relates to oil field development technical field, particularly relate to a kind of method determining horizontal well Number of Fractures.
Background technology
Along with domestic horizontal well technology is gradually improved, horizontal well has become the important means improving single well productivity, improve reserves exploitation rate, improve recovery ratio, increase economic efficiency.Current horizontal well application substantially covers all Oil-gas Accumulation Types, be widely used in the various oil-gas reservoirs such as viscous crude, fault block, hyposmosis, complex lithology, along with the expansion of horizontal well application, the Margin reservoirs such as thin layer viscous crude, end water viscous crude, super―heavy oil utilize horizontal well to realize effective exploitation.Along with the extensive use since China Petrochemical Industry's horizontal well Eleventh Five-Year Plan, the horizontal well rate of driving a well is basically stable at about 89%, show according to research, the Number of Fractures of horizontal well is more, primiparity and final oil production larger, but along with increasing of Number of Fractures, tired oil increment is more and more less, namely there is rational Number of Fractures can make maximization of economic benefit.We have invented a kind of method of new determination horizontal well Number of Fractures for this reason, solve above technical problem.
Summary of the invention
The object of this invention is to provide a kind of under specific oil reservoir determines the prerequisite that employing horizontal well well type is developed, accurately describe crack and determine the method for Number of Fractures.
Object of the present invention realizes by following technical measures: the method determining horizontal well Number of Fractures, and this determines that the method for horizontal well Number of Fractures comprises: step 1, determines the scope of survey region, and carries out regional assignment to the grid of research; Step 2, carries out unstrctured grid encryption to this survey region and arranges refined net direction, and fracture grid assignment; Step 3, carries out numerical simulation and draws the individual well horizontal well production that different Number of Fractures is corresponding; Step 4, carries out zero dimension by horizontal well production, and obtaining Number of Fractures affects comparison diagram to recovery ratio; And step 5, the contribution amount of the dimensionless production corresponding in conjunction with Number of Fractures and for many years tired oil, determines rational Number of Fractures.
Object of the present invention also realizes by following technical measures:
In step 2, unstrctured grid encryption is carried out to this survey region refined net direction is set, and utilize equivalent flow resistance method principle fracture grid assignment.
In step 2, after utilizing local mesh reflnement module installation fracture length, width, these parameters of flow conductivity, recycling numerical simulation draws the individual well horizontal well production that different Number of Fractures is corresponding.
In step 4, when horizontal well production is carried out zero dimension, horizontal well production/1 crack the horizontal well production of dimensionless production=N crack, and contrasting the recovery ratio increase rate under different Number of Fractures, show that Number of Fractures affects comparison diagram to recovery ratio.
In steps of 5, the contribution amount of the dimensionless production corresponding in conjunction with Number of Fractures and 15 years tired oil, determines rational Number of Fractures.
The method of the determination horizontal well Number of Fractures in the present invention, for specific oil reservoir, after determining horizontal segment layer position and horizontal well direction, determines that rational Number of Fractures is to guarantee maximization of economic benefit.Utilize the NWM module in eclipse to describe the length in crack, direction, flow conductivity accurately, and crack width can be accurate to mm rank.Accurate crack is described after, obtain the tired oil of horizontal well under different Number of Fractures.Horizontal well production is carried out zero dimension, and the recovery ratio increase rate under different Number of Fractures is contrasted, show that Number of Fractures affects comparison diagram to recovery ratio.For specified level well, the horizontal well of identical horizontal section length has identical reserves controlling extent, and the dimensionless production corresponding in conjunction with Number of Fractures and the contribution amount of ultimate recovery, can determine rational Number of Fractures.
Accompanying drawing explanation
Fig. 1 is the flow chart determining a specific embodiment of the method for horizontal well Number of Fractures of the present invention;
Fig. 2 is different fractuer direction schematic diagram in NWM module;
Fig. 3 be in a specific embodiment of the present invention Number of Fractures to development effect influence comparison diagram.
Detailed description of the invention
For making above and other object of the present invention, feature and advantage can become apparent, cited below particularly go out preferred embodiment, and coordinate institute's accompanying drawings, be described in detail below.
As shown in Figure 1, Fig. 1 is the flow chart determining the method for horizontal well Number of Fractures of the present invention.
In step 101, define the scope (VOI region) of the survey region that may feed through to, and regional assignment is carried out to the grid of research.Flow process enters into step 102.
In step 102, unstrctured grid encryption is carried out to selected zone and refined net direction is set and utilizes equivalent flow resistance method principle fracture grid assignment.After utilizing local mesh reflnement module installation fracture length, width, these parameters of flow conductivity, recycling numerical simulation software eclipse draws the individual well horizontal well production that different Number of Fractures is corresponding.Flow process enters into step 103.
In step 103, after accurately describing crack, individual well corresponding to different Number of Fractures tires out oil mass to utilize numerical simulation software eclipse to draw.Flow process enters into step 104.
In step 104, output is carried out zero dimension (horizontal well production/1 crack horizontal well production of dimensionless production=N crack), and the recovery ratio increase rate under different Number of Fractures is contrasted, show that Number of Fractures affects comparison diagram to recovery ratio.Flow process enters into step 105.
In step 105, the contribution amount of the dimensionless production corresponding in conjunction with Number of Fractures and 15 years tired oil, determines that rational Number of Fractures is to guarantee maximization of economic benefit.Flow process terminates.
The method of the determination horizontal well Number of Fractures in the present invention, fractured horizontal well exploitation is adopted by determining certain oil reservoir, the deployment region of horizontal well is divided in local mesh reflnement (NWM) module, and in deployment region, the crack of horizontal well is accurately described, by the statistics of the fracture condudtiviy of horizontal well of having gone into operation to oil reservoir of the same type, equivalent flow resistance method principle is used to give mm rank crack equivalent conductivity in NWM module.Behind accurate description crack, under can drawing different Number of Fractures, horizontal well is to the ultimate recovery of this block.Output is carried out zero dimension (horizontal well production/1 crack horizontal well production of dimensionless production=N crack), and the recovery ratio increase rate under different Number of Fractures is contrasted, show that Number of Fractures affects comparison diagram to recovery ratio.Relative to specified level well, horizontal well length is certain, and namely reserves controlling extent is certain, and the dimensionless production corresponding in conjunction with Number of Fractures and the contribution amount of ultimate recovery, can determine rational Number of Fractures.
Can find out in fig. 2, NWM module can describe the fractuer direction of any direction, relates to area grid direction change at survey region internal fissure.As shown in Figure 3, utilize little Ying oil field beam 75 pieces of parameter conceputal modelings, for the horizontal well of 600 meters of horizontal segment lengths, drawing Number of Fractures affects comparison diagram respectively on dimensionless production and recovery ratio increase rate.
The present invention uses the NWM module in eclipse, application equivalent flow resistance ratio juris fracture grid assignment, the individual well obtaining different Number of Fractures corresponding tires out oil mass, and output is carried out zero dimension (horizontal well production/1 crack horizontal well production of dimensionless production=N crack), and the recovery ratio increase rate under different Number of Fractures is contrasted, show that Number of Fractures affects comparison diagram to recovery ratio, finally determines rational Number of Fractures.
Claims (5)
1. determine the method for horizontal well Number of Fractures, it is characterized in that, this determines that the method for horizontal well Number of Fractures comprises:
Step 1, determines the scope of survey region, and carries out regional assignment to the grid of research;
Step 2, carries out unstrctured grid encryption to this survey region and arranges refined net direction, and fracture grid assignment;
Step 3, carries out numerical simulation and draws the individual well horizontal well production that different Number of Fractures is corresponding;
Step 4, carries out zero dimension by horizontal well production, and obtaining Number of Fractures affects comparison diagram to recovery ratio; And
Step 5, the contribution amount of the dimensionless production corresponding in conjunction with Number of Fractures and for many years tired oil, determines rational Number of Fractures.
2. the method determining horizontal well Number of Fractures according to claim 1, is characterized in that, in step 2, carries out unstrctured grid encryption and arranges refined net direction, and utilize equivalent flow resistance method principle fracture grid assignment to this survey region.
3. the method determining horizontal well Number of Fractures according to claim 2, it is characterized in that, in step 2, after utilizing local mesh reflnement module installation fracture length, width, these parameters of flow conductivity, recycling numerical simulation draws the individual well horizontal well production that different Number of Fractures is corresponding.
4. the method determining horizontal well Number of Fractures according to claim 1, it is characterized in that, in step 4, when horizontal well production is carried out zero dimension, horizontal well production/1 crack the horizontal well production of dimensionless production=N crack, and the recovery ratio increase rate under different Number of Fractures is contrasted, show that Number of Fractures affects comparison diagram to recovery ratio.
5. the method determining horizontal well Number of Fractures according to claim 1, is characterized in that, in steps of 5, the contribution amount of the dimensionless production corresponding in conjunction with Number of Fractures and 15 years tired oil, determines rational Number of Fractures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410154468.6A CN105003246A (en) | 2014-04-17 | 2014-04-17 | Method for determining horizontal well fracture number |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410154468.6A CN105003246A (en) | 2014-04-17 | 2014-04-17 | Method for determining horizontal well fracture number |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105003246A true CN105003246A (en) | 2015-10-28 |
Family
ID=54376077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410154468.6A Pending CN105003246A (en) | 2014-04-17 | 2014-04-17 | Method for determining horizontal well fracture number |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105003246A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298464A (en) * | 2015-11-26 | 2016-02-03 | 东北石油大学 | Method for describing tight reservoir volume fracture tree random seamed web without containing natural fracture |
| CN107194070A (en) * | 2017-05-23 | 2017-09-22 | 西南石油大学 | A kind of method that horizontal well fracture parameters are determined based on PEBI mesh refinements |
| CN109424348A (en) * | 2017-09-05 | 2019-03-05 | 中国石油化工股份有限公司 | The judgment method and system of the more cluster perforating and fracturing Number of Fractures of horizontal well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090125280A1 (en) * | 2007-11-13 | 2009-05-14 | Halliburton Energy Services, Inc. | Methods for geomechanical fracture modeling |
| CN102606126A (en) * | 2012-03-27 | 2012-07-25 | 东方宝麟科技发展(北京)有限公司 | Non-planar network fracturing control method for fractured reservoir |
| CN103256035A (en) * | 2013-05-22 | 2013-08-21 | 中国石化集团华北石油局 | Fracturing fracture geological design method of horizontal well of dense gas field |
| CN103437746A (en) * | 2013-06-28 | 2013-12-11 | 东方宝麟科技发展(北京)有限公司 | Volume fracturing method for multiple cracks in multiple sections of horizontal well |
| CN103577886A (en) * | 2012-08-06 | 2014-02-12 | 中国石油化工股份有限公司 | Staged fracturing yield prediction method of low-permeability gas reservoir horizontal well |
-
2014
- 2014-04-17 CN CN201410154468.6A patent/CN105003246A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090125280A1 (en) * | 2007-11-13 | 2009-05-14 | Halliburton Energy Services, Inc. | Methods for geomechanical fracture modeling |
| CN102606126A (en) * | 2012-03-27 | 2012-07-25 | 东方宝麟科技发展(北京)有限公司 | Non-planar network fracturing control method for fractured reservoir |
| CN103577886A (en) * | 2012-08-06 | 2014-02-12 | 中国石油化工股份有限公司 | Staged fracturing yield prediction method of low-permeability gas reservoir horizontal well |
| CN103256035A (en) * | 2013-05-22 | 2013-08-21 | 中国石化集团华北石油局 | Fracturing fracture geological design method of horizontal well of dense gas field |
| CN103437746A (en) * | 2013-06-28 | 2013-12-11 | 东方宝麟科技发展(北京)有限公司 | Volume fracturing method for multiple cracks in multiple sections of horizontal well |
Non-Patent Citations (1)
| Title |
|---|
| 陈辉 等: "压裂水平井裂缝布局研究", 《石油天然气学报（江汉石油学院学报）》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298464A (en) * | 2015-11-26 | 2016-02-03 | 东北石油大学 | Method for describing tight reservoir volume fracture tree random seamed web without containing natural fracture |
| CN105298464B (en) * | 2015-11-26 | 2018-02-16 | 东北石油大学 | The tree-shaped random seam net description method of compact reservoir volume fracturing without intrinsic fracture |
| CN107194070A (en) * | 2017-05-23 | 2017-09-22 | 西南石油大学 | A kind of method that horizontal well fracture parameters are determined based on PEBI mesh refinements |
| CN109424348A (en) * | 2017-09-05 | 2019-03-05 | 中国石油化工股份有限公司 | The judgment method and system of the more cluster perforating and fracturing Number of Fractures of horizontal well |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lichun et al. | Exploration of fan-controlled large-area lithologic oil reservoirs of Triassic Baikouquan Formation in slope zone of Mahu Depression in Junggar Basin | |
| CN107044277B (en) | Low permeable and heterogeneity reservoir horizontal well refracturing yield potential evaluation method | |
| CN104616350B (en) | Fracture hole type carbonate reservoir three-dimensional physical model method for building up | |
| Zeng et al. | Analysis of influencing factors of production performance of enhanced geothermal system: A case study at Yangbajing geothermal field | |
| CN104141481B (en) | Horizontal well spacing method for ultra-low permeability tight reservoir | |
| Sun | Advanced production decline analysis and application | |
| CN103577886A (en) | Staged fracturing yield prediction method of low-permeability gas reservoir horizontal well | |
| CN103590818B (en) | Method and device for semi-analytically determining temperature distribution in shaft | |
| CN103778298B (en) | The multi-level finite element modeling method of two dimension flow motion in the simulation porous media improved | |
| CN103400020A (en) | Numerical reservoir simulation method for measuring flowing situation of a plurality of intersected discrete cracks | |
| CN103912248A (en) | Method for predicting water content of water-flooding oil field | |
| CN103867175A (en) | Steam flooding well pattern structure and steam flooding development method thereof | |
| CN104314547A (en) | HAFD segmented optimization method and system | |
| Zeng et al. | Numerical investigation of electricity generation potential from fractured granite reservoir by water circulating through three horizontal wells at Yangbajing geothermal field | |
| CN103939066A (en) | Method for determining oil well liquid production capacities by determining water injection capacities of one-injection and multi-production well group | |
| CN105003246A (en) | Method for determining horizontal well fracture number | |
| CN102654586A (en) | Multi-scale fracture modeling method | |
| CN104712301A (en) | Method for determining fracturing size of volcanic reservoir | |
| CN106150461A (en) | Chemical flooding numerical reservoir simulation method | |
| Zhai et al. | Parametric study of the geothermal exploitation performance from a HDR reservoir through multilateral horizontal wells: The Qiabuqia geothermal area, Gonghe Basin | |
| CN103334740B (en) | Consider the method for the determination drainage front of free-boundary problem | |
| CN106401549A (en) | Method of building influence plate on horizontal well production effect by crack and well trajectory angle | |
| CN106845685B (en) | Parameter optimization method for reducing horizontal well oil testing fracturing operation cost | |
| CN111101930B (en) | Single-well exploitation production-increasing potential evaluation method in gas reservoir development mode | |
| Xue et al. | Productivity model for gas reservoirs with open-hole multi-fracturing horizontal wells and optimization of hydraulic fracture parameters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151028 |