CN110173252B - Encryption method and evaluation method for horizontal well development gas reservoir well pattern - Google Patents
Encryption method and evaluation method for horizontal well development gas reservoir well pattern Download PDFInfo
- Publication number
- CN110173252B CN110173252B CN201910350991.9A CN201910350991A CN110173252B CN 110173252 B CN110173252 B CN 110173252B CN 201910350991 A CN201910350991 A CN 201910350991A CN 110173252 B CN110173252 B CN 110173252B
- Authority
- CN
- China
- Prior art keywords
- well
- encryption
- horizontal well
- horizontal
- development
- 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.)
- Active
Links
Images
Classifications
-
- 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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
Abstract
The invention discloses a method for encrypting a gas reservoir well pattern for horizontal well development and an evaluation method thereof, and relates to the technical field of natural gas reservoir engineering. According to the method for encrypting the well pattern of the horizontal well development gas reservoir, a reasonable number of encryption wells are arranged at proper positions in the minimum horizontal well pattern development unit, so that ordered development of longitudinal well patterns is realized, the utilization rate of the well pattern is improved, uniform oil reservoir utilization is realized, plane contradiction in the oil reservoir development process is reduced, and the method is favorable for increasing the cumulative oil yield of an oil field and improving the recovery ratio. The evaluation method of the horizontal well development gas reservoir well pattern encryption method combines various factors such as cost, gas price, tax and the like, can objectively evaluate the development potential of the oil reservoir and guide the development and production practice of the oil field.
Description
Technical Field
The invention relates to the technical field of natural gas reservoir engineering, in particular to a method for encrypting a horizontal well development gas reservoir well pattern and an evaluation method thereof.
Background
In recent years, horizontal wells are more and more widely applied to compact gas reservoirs, although the contact area between a shaft and the gas reservoir can be greatly increased by using the horizontal wells, the gas seepage resistance is reduced, and the reserve utilization degree of a gas layer encountered by the horizontal well drilling is improved. However, the horizontal well has a lower vertical utilization degree in the reservoir stratum, and the reservoir stratum with part of the horizontal wells not perforated still has a larger development potential, as shown in fig. 1, the gas in the horizontal well perforated layer can easily flow to the shaft and then be exploited to the ground; however, because the presence of the separation layer makes it difficult for fluid in the two gas layers separated by the separation layer to flow into the wellbore across the separation layer, the two gas layers have a low reserve capacity and a large residual capacity.
The well pattern encryption method mainly comprises encryption well number design and encryption mode design, wherein the encryption well number design mainly considers that the investment of an encryption well is less than the income brought by the encryption well; the design of the encryption mode is to take into consideration the position where the encryption well is deployed so as to produce the maximum amount of natural gas. At present, no scholars at home and abroad publicly disclose relevant researches on encryption optimization design of horizontal well development gas reservoir well patterns.
Disclosure of Invention
The invention aims to provide a method for encrypting a well pattern of a horizontal well exploitation gas reservoir and an evaluation method thereof, which can realize effective exploitation of the reservoir which is not used under the condition of economic benefit permission by utilizing a well pattern encryption mode according to the development degree of the reservoir which is not used in the longitudinal direction, and improve the overall recovery ratio of the gas reservoir.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention discloses a method for encrypting a gas reservoir well pattern for horizontal well development, which comprises the following steps of:
scheme 1: when the number of the encrypted wells is 1, the encrypted wells are first encrypted wells, and the first encrypted wells are arranged at diagonal intersection points of quadrangles formed by end points close to the first horizontal well, the second horizontal well, the third horizontal well and the fourth horizontal well;
scheme 2: when the number of the encrypted wells is 2, the encrypted wells are a second encrypted well and a third encrypted well, and the second encrypted well is arranged in the center of a rectangle formed by two end points of a first horizontal well and two end points of a second horizontal well in the minimum horizontal well pattern development unit; the third encrypted well is deployed in the center of a rectangle formed by two end points of a third horizontal well and two end points of a fourth horizontal well in the minimum horizontal well pattern development unit;
scheme 3: when the number of the encrypted wells is 3, the encrypted wells are a first encrypted well, a second encrypted well and a third encrypted well, and the first encrypted well is arranged at a diagonal intersection point of a quadrangle formed by end points close to the first horizontal well, the second horizontal well, the third horizontal well and the fourth horizontal well; the second encrypted well is deployed in the center of a rectangle formed by two end points of the first horizontal well and two end points of the second horizontal well in the minimum horizontal well pattern development unit; and the third encrypted well is deployed in the center of a rectangle formed by two end points of the third horizontal well and two end points of the fourth horizontal well in the minimum horizontal well pattern development unit.
Preferably, the first infill well, the second infill well and the third infill well are vertical wells.
The invention discloses an evaluation method of the horizontal well development gas reservoir well pattern encryption method, which is characterized by comprising the following steps of:
s1: calculating the minimum accumulated gas production Q required by the well construction investment of a recovery encrypted wellmin；
S2: evaluating final accumulated gas production Q of single well of encrypted well in three sets of well pattern encryption schemesFinal (a Chinese character of 'gan')；
S3: and selecting an optimal implementation scheme from the three sets of well pattern encryption schemes according to the relationship between investment and return.
Preferably, in step S1, the minimum accumulated gas production required for the encrypted well construction investment is calculated according to the following formula,
Qminwell-building investment ÷ (air price-unit operating cost-unit tax fund)
Wherein: the well construction investment is the well drilling cost plus the well completion cost.
Preferably, in step S2, a three-dimensional fine geologic model is established by developing a fine description of a reservoir in a target region, and a numerical model history fitting including block pressure fitting, single well yield fitting, single well oil pressure and casing pressure fitting is developed by combining historical production data, and finally, a numerical simulation method is used for evaluation.
Further preferably, the three-dimensional fine geological model comprises a gas reservoir tectonic model, a sedimentary facies model and a property model.
Preferably, the specific steps of step S3 are:
s3.1: will QFinal (a Chinese character of 'gan')And QminComparing;
s3.2: at QFinal (a Chinese character of 'gan')＞QminThe scheme of (4) is that the scheme with the maximum total gas production is selected as the optimal embodiment.
Compared with the prior art, the invention has at least the following beneficial effects:
according to the method for encrypting the well pattern of the horizontal well development gas reservoir, disclosed by the invention, by arranging a reasonable number of encryption wells at proper positions in a minimum horizontal well pattern development unit, ordered development of each longitudinal sleeve layer system is realized, the well pattern utilization rate is improved, meanwhile, uniform oil reservoir utilization is realized, plane contradiction in the oil reservoir development process is reduced, and the method is favorable for increasing the cumulative oil production of an oil field and improving the recovery ratio.
The evaluation method of the horizontal well development gas reservoir well pattern encryption method disclosed by the invention can be used for objectively evaluating the development potential of an oil reservoir and guiding the development and production practice of an oil field by combining various factors such as cost, gas price, tax and the like.
Drawings
FIG. 1 is a schematic illustration of horizontal well mining;
FIG. 2 is a schematic illustration of the location of the horizontal and infill wells of scenario 1 of the present invention;
FIG. 3 is a schematic illustration of the location of the horizontal and infill wells of scenario 2 of the present invention;
fig. 4 is a schematic position diagram of the horizontal well and the infill well of option 3 of the present invention.
In the figure: the method comprises the following steps of 1, 2, 3, 4, 5, 6 and 7.
Detailed Description
The invention is further described below by evaluating the gas reservoir pattern encryption and pattern encryption schemes developed for a gas field horizontal well.
Step 1: designing three sets of well pattern encryption schemes;
for a rectangular horizontal well development unit formed by a first horizontal well 1, a second horizontal well 2, a third horizontal well 3 and a fourth horizontal well 4, all the encrypted well types are straight wells, the number of the encrypted wells in the three sets of schemes is 1, 2 and 3 respectively, and the deployment positions of the encrypted wells are as follows:
scheme 1: when the number of the encryption wells is 1, the first encryption well 5 is arranged at a diagonal intersection point of a quadrangle formed by end points close to the first horizontal well 1, the second horizontal well 2, the third horizontal well 3 and the fourth horizontal well 4; namely: the first encryption well 5 is deployed at the central position of a rectangle formed by the first horizontal well 1, the second horizontal well 2, the third horizontal well 3 and the fourth horizontal well 4, as shown in fig. 2;
scheme 2: when the number of the encrypted wells is 2, the second encrypted well 6 is deployed in the center of a rectangle formed by two end points of the first horizontal well 1 and two end points of the second horizontal well 2 in the minimum horizontal well pattern development unit; the third encrypted well 7 is arranged in the center of a rectangle formed by two end points of the third horizontal well 3 and two end points of the fourth horizontal well 4 in the minimum horizontal well pattern development unit; namely: the second encryption well 6 is arranged at the central symmetrical position of the rectangle formed by the first horizontal well 1 and the second horizontal well 2, and the third encryption well 7 is arranged at the central symmetrical position of the rectangle formed by the third horizontal well 3 and the fourth horizontal well 4, as shown in fig. 3;
scheme 3: when the number of the encryption wells is 3, the first encryption well 5 is arranged at a diagonal intersection point of a quadrangle formed by end points close to the first horizontal well 1, the second horizontal well 2, the third horizontal well 3 and the fourth horizontal well 4; the second encrypted well 6 is arranged in the center of a rectangle formed by two end points of the first horizontal well 1 and two end points of the second horizontal well 2 in the minimum horizontal well pattern development unit; the third encrypted well 7 is arranged in the center of a rectangle formed by two end points of the third horizontal well 3 and two end points of the fourth horizontal well 4 in the minimum horizontal well pattern development unit; namely: the second encryption well 6 is deployed at the central symmetrical position of the rectangle formed by the first horizontal well 1 and the second horizontal well 2, the third encryption well 7 is deployed at the central symmetrical position of the rectangle formed by the third horizontal well 3 and the fourth horizontal well 4, and the first encryption well 5 is deployed at the central position of the rectangle formed by the first horizontal well 1, the second horizontal well 2, the third horizontal well 3 and the fourth horizontal well 4, as shown in fig. 4.
Step 2: calculating the minimum accumulated gas production Q required by the well construction investment of a recovery encrypted wellminWherein the well depth of the gas well is 3300 meters, the drilling investment of a newly drilled straight well in 2017 is 475 ten thousand yuan, the well completion cost is 257 ten thousand yuan, the gas price is 1.145 ten thousand yuan per ten thousand yuan, the operating cost of 0.2051 ten thousand yuan per ten thousand of gasThe tax is 0.06717 ten thousand yuan.
Well construction investment, drilling cost and well completion cost
QminWell-building investment ÷ (air price-unit operating cost-unit tax fund)
Calculating the minimum accumulated gas production required by the well construction investment of a recovery encrypted well according to the equation to be 839 ten thousand square;
and step 3: establishing a three-dimensional fine geological model including a gas reservoir sedimentary facies model, a lithofacies model, a structural model and an attribute model by developing fine description of a reservoir in a target region; on the basis, historical production data is combined, and numerical model historical fitting is carried out, wherein the numerical model historical fitting comprises block pressure fitting, single well yield fitting, single well oil pressure fitting and casing pressure fitting; finally adopting a numerical simulation method, and under the condition of different encryption well numbers, the final accumulated gas production Q of the encryption wellFinal (a Chinese character of 'gan')See table 1;
and 4, step 4: according to the calculation results of the step 1 and the step 2, in the scheme 3, when the number of the encryption wells is 3, the final accumulated gas production amount Q of each encryption well is obtainedFinal (a Chinese character of 'gan')758 ten thousand square, less than the minimum accumulated gas production required to recover a single well investment gas well, thus abandoning the scheme; in the scheme 1 and the scheme 2, when the number of the encryption wells is 1 and 2, the final accumulated gas production Q of each encryption well is obtainedFinal (a Chinese character of 'gan')1365 ten thousand squares and 1050 ten thousand squares respectively which are more than the minimum accumulated gas production Q required for recovering the single-well investment gas wellminAnd selecting the scheme 2 as the optimal scheme for the encryption of the gas reservoir well pattern developed by the horizontal well of the gas field according to the principle that the total gas production amount is the most.
TABLE 1 Final gas production and total gas production in single well of encrypted well in different schemes
In conclusion, the evaluation method for the encryption method for developing the gas reservoir well pattern by the horizontal well, provided by the invention, combines various factors such as cost, gas price, tax and the like, more objectively evaluates the three encryption schemes provided by the invention, and can further guide the development and production practice of the oil field.
Claims (6)
1. The method for encrypting the horizontal well developed gas reservoir well pattern is characterized in that a rectangular minimum horizontal well pattern development unit consisting of a first horizontal well (1), a second horizontal well (2), a third horizontal well (3) and a fourth horizontal well (4) comprises the following three sets of well pattern encryption schemes:
when the number of the encryption wells is 1, the encryption well is a first encryption well (5), and the first encryption well (5) is arranged at the center of a rectangle formed by a first horizontal well (1), a second horizontal well (2), a third horizontal well (3) and a fourth horizontal well (4);
when the number of the encryption wells is 2, the encryption wells are a second encryption well (6) and a third encryption well (7), and the second encryption well (6) is arranged in the center of a rectangle formed by the first horizontal well (1) and the second horizontal well (2); the third encrypted well (7) is arranged at the center of a rectangle formed by the third horizontal well (3) and the fourth horizontal well (4);
when the number of the encryption wells is 3, the encryption wells are a first encryption well (5), a second encryption well (6) and a third encryption well (7), and the first encryption well (5) is arranged at the center of a rectangle formed by a first horizontal well (1), a second horizontal well (2), a third horizontal well (3) and a fourth horizontal well (4); the second encryption well (6) is arranged in the center of a rectangle formed by the first horizontal well (1) and the second horizontal well (2); the third encrypted well (7) is arranged at the center of a rectangle formed by the third horizontal well (3) and the fourth horizontal well (4);
the first encryption well (5), the second encryption well (6) and the third encryption well (7) are all vertical wells.
2. The evaluation method for the horizontal well development gas reservoir well pattern encryption method based on the claim 1 is characterized by comprising the following steps:
s1: calculating the minimum accumulated gas production Q required by the well construction investment of a recovery encrypted wellmin；
S2: evaluating final accumulated gas production Q of single well of encrypted well in three sets of well pattern encryption schemesFinal (a Chinese character of 'gan')；
S3: and selecting an optimal implementation scheme from the three sets of well pattern encryption schemes according to the relationship between investment and return.
3. The evaluation method for the encryption method of the horizontal well development gas reservoir well pattern according to claim 2, characterized in that in step S1, the minimum accumulated gas production required by the investment of the well construction of the encrypted well is calculated according to the following formula,
Qminwell-building investment ÷ (air price-unit operating cost-unit tax fund)
Wherein: the well construction investment is the well drilling cost plus the well completion cost.
4. The evaluation method of the horizontal well development gas reservoir well pattern encryption method according to claim 2, wherein in step S2, a three-dimensional fine geological model is established by developing fine description of a reservoir in a target area, and numerical model history fitting including block pressure fitting, single well yield fitting, single well oil pressure and casing pressure fitting is developed by combining historical production data, and finally, a numerical simulation method is adopted for evaluation.
5. The evaluation method of the horizontal well development gas reservoir well pattern encryption method according to claim 2, wherein the three-dimensional fine geological model comprises a gas reservoir tectonic model, a sedimentary facies model and an attribute model.
6. The evaluation method for the horizontal well development gas reservoir well pattern encryption method according to claim 2, wherein the specific steps of the step S3 are as follows:
s3.1: will QFinal (a Chinese character of 'gan')And QminComparing;
s3.2: at QFinal (a Chinese character of 'gan')＞QminThe scheme of (4) is that the scheme with the maximum total gas production is selected as the optimal embodiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910350991.9A CN110173252B (en) | 2019-04-28 | 2019-04-28 | Encryption method and evaluation method for horizontal well development gas reservoir well pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910350991.9A CN110173252B (en) | 2019-04-28 | 2019-04-28 | Encryption method and evaluation method for horizontal well development gas reservoir well pattern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110173252A CN110173252A (en) | 2019-08-27 |
| CN110173252B true CN110173252B (en) | 2021-08-31 |
Family
ID=67690200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910350991.9A Active CN110173252B (en) | 2019-04-28 | 2019-04-28 | Encryption method and evaluation method for horizontal well development gas reservoir well pattern |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110173252B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617048B (en) * | 2019-10-08 | 2021-11-02 | 中国石油天然气股份有限公司 | Gas storage well spacing method |
| CN111502615B (en) * | 2019-12-19 | 2022-03-08 | 大庆油田有限责任公司 | Well group injection-production relationship perfection quantitative evaluation method based on plane |
| CN111441757B (en) * | 2020-06-09 | 2022-02-11 | 陕西延长石油（集团）有限责任公司 | Well arrangement method for determining directional well pattern of dense gas reservoir |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5957202A (en) * | 1997-03-13 | 1999-09-28 | Texaco Inc. | Combination production of shallow heavy crude |
| CN202810813U (en) * | 2012-08-08 | 2013-03-20 | 张方礼 | Well pattern structure for using combustion and steam combination flooding to jointly exploit thick oil |
| CN205297523U (en) * | 2015-12-29 | 2016-06-08 | 中国石油天然气股份有限公司 | Well type is adopted to notes to old oil field development |
| CN106761631A (en) * | 2016-12-30 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of oil production method and well pattern |
-
2019
- 2019-04-28 CN CN201910350991.9A patent/CN110173252B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5957202A (en) * | 1997-03-13 | 1999-09-28 | Texaco Inc. | Combination production of shallow heavy crude |
| CN202810813U (en) * | 2012-08-08 | 2013-03-20 | 张方礼 | Well pattern structure for using combustion and steam combination flooding to jointly exploit thick oil |
| CN205297523U (en) * | 2015-12-29 | 2016-06-08 | 中国石油天然气股份有限公司 | Well type is adopted to notes to old oil field development |
| CN106761631A (en) * | 2016-12-30 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of oil production method and well pattern |
Non-Patent Citations (1)
| Title |
|---|
| 苏里格气田苏53区块合理井网井距研究;朱新佳;《石油地质与工程》;20100131;第24卷(第1期);第73-75页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110173252A (en) | 2019-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110173252B (en) | Encryption method and evaluation method for horizontal well development gas reservoir well pattern | |
| CA2651527C (en) | Method and system for enhancing a recovery process employing one or more horizontal wellbores | |
| Miskimins | Design and life-cycle considerations for unconventional-reservoir wells | |
| CN102799955B (en) | Water bursting coefficient is less than 0.06MPa/m district Water Inrush and evaluates three figure methods | |
| CN106437674A (en) | Imitation horizontal well waterflooding well pattern adapting method | |
| CN111080789B (en) | Method and device for determining well position of encrypted well in complex fault block oil reservoir exploitation area | |
| WO2004007906A1 (en) | A subterranean drainage pattern and a method for drilling ramped wellbores | |
| CN108343420A (en) | A kind of big well group well-arranging procedure of the factory operation of multifactor Cooperative Analysis | |
| CN113177322B (en) | Fracturing single well control reserve calculation method | |
| CN115163025A (en) | In-situ leaching precise mining method for sandstone-type uranium ore | |
| CN110306965A (en) | A kind of method for increasing for coal bed gas low yield wellblock | |
| CN103628848B (en) | Multidirectional interlayer displacement in flooding oil production method and system | |
| CN105046060B (en) | A kind of seat earth high artesian underground single hole dredges drop optimization method | |
| RU2579039C1 (en) | Method for development of low-permeability oil-gas formations | |
| CN210068123U (en) | Shale gas reservoir multilateral well exploitation well pattern structure | |
| CN105275457B (en) | Self-contained old filed fluvial depositional reservoir horizontal well disposes optimal mode research method | |
| Dietrich | Steamflooding in a Waterdrive Reservoirs Upper Tulare Sands, South Belridge Field | |
| RU2519949C1 (en) | Method for development of oil pool section | |
| Carpenter | Best practices for waterflooding optimization improve oil recovery in mature fields | |
| CN112012711A (en) | Fracturing method for highly deviated well | |
| US20150198013A1 (en) | Horizontal wellbore orientation system | |
| RU2788189C1 (en) | Method for developing oil deposits | |
| CN218669315U (en) | Well spacing system for coal bed gas exploitation | |
| CN212428764U (en) | Self-driving well for self-injection and self-production in same layer of same well | |
| Kumar et al. | Application of Inflow Control Devices in Horizontal Well in Bottom Water Drive Reservoir using Reservoir Simulation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |