WO2009154500A1 - Method for optimizing reservoir production analysis - Google Patents
Method for optimizing reservoir production analysis Download PDFInfo
- Publication number
- WO2009154500A1 WO2009154500A1 PCT/RU2008/000387 RU2008000387W WO2009154500A1 WO 2009154500 A1 WO2009154500 A1 WO 2009154500A1 RU 2008000387 W RU2008000387 W RU 2008000387W WO 2009154500 A1 WO2009154500 A1 WO 2009154500A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reservoir
- production
- commingled
- layer
- production data
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004458 analytical method Methods 0.000 title description 8
- 238000005457 optimization Methods 0.000 claims description 5
- 230000002500 effect on skin Effects 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 23
- 238000011156 evaluation Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Classifications
-
- 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
- E21B43/14—Obtaining from a multiple-zone well
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
-
- 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
Definitions
- This invention relates to methods for optimizing the overall reservoir production.
- the invention relates to the use of reservoir and fracture properties in the analysis of production performance of multilayer commingled reservoirs.
- Reservoir characterization and well completion efficiency evaluation in a multilayer commingled system and well production performance data and periodic production log measurements is a very important task.
- Commingled well production data from a system with a number of different layers with varying reservoir and well completion properties should not in general be evaluated using an equivalent single layer reservoir analog. The results of such an analysis for determining estimates of the reservoir properties and completion efficiencies of each of the individual reservoir layers in this case will be very inaccurate.
- the data used in this analysis method are the commingled reservoir system production data (fluid phase flow rates), the wellhead flowing temperatures and pressures, the complete wellbore and tubular goods description and production log information. These values are used in a computational analysis to construct the equivalent individual completed interval production histories that can subsequently be used for the evaluation of the reservoir and completion properties in each of the completed reservoir layers. Obviously, many of these reservoir and well completion properties also affect the allocation of the commingled reservoir production data.
- US6101447, US6691037, US6842700, US5960369 and US6571619 propose methods for obtaining improved well production optimization based on type curves methods, history matching, and other methods for reducing the non- uniqueness of solution. These methods can be applied to different types of reservoirs, such as a conventional reservoir, a tight gas reservoir, and where only incomplete pressure/rate history records are available. These methods only consider that the production performance of a single reservoir layer in the system. It is an object of the invention to provide an improved methodology that can be applied to multi-layer reservoir systems. Disclosure of the invention
- a first aspect of the invention comprises a method for optimizing reservoir production in a commingled hydraulically fractured reservoir comprising: allocating commingled system production data to each of the individual completed intervals in the system; calculating the reservoir and fracture properties for each completed reservoir layer; recalibrating the commingled and individual layer production data by accounting for the individual completed interval reservoir and fracture properties.
- the reservoir and fracture properties are calculated using the transient and stabilized inflow performance relationship established using the multi-rate production log information.
- the individual layer production data may be accounted for by using approximate values of the reservoir and/or fracture properties and then updating and correcting the relative input parameter estimates for every layer in the commingles reservoir system.
- the reservoir and fracture properties may comprise effective permeability, initial reservoir pressure, reservoir effective drainage area, steady state skin effect, average fracture conductivity and/or effective fracture half-length.
- the production data may comprise commingled well production data, wellhead flowing temperatures and/or pressures, the description of the complete wellbore and its tubular components and/or production log information.
- Preferably allocating commingled production data to of the completed intervals in the system comprises using multi-rate production log information.
- the method can further comprise using the well production performance data derived for each layer in the commingled system for further production performance optimization and forecasting.
- Figure 1 shows a flowchart of the workflow for the optimisation of overall reservoir production. Mode(s) for carrying out the invention
- the invention provides a method to maximize the efficiency of the reservoir production data analysis by using the allocation of the commingled production data in a commingled multilayer hydraulically fractured reservoir with multi-rate production log information.
- An additional step in the production data allocation using modern multi- rate production logs to establish the inflow performance behaviour of each of the completed intervals in the well is performed to maximise the efficiency of the reservoir production data analysis.
- the additional step involves the calculation of the reservoir and fracture properties for each completed reservoir layer from the inflow performance behaviour of each of the completed intervals in the system and the further recalibration of the production data allocation taking into account the reservoir and fracture properties. This results in a more reliable production performance allocation for each completed layer in the system, and as a result a better optimization of the overall reservoir production.
- the commingled system performance data allocation process takes into account the reservoir and fracture properties such as the effective permeability, initial reservoir pressure, reservoir effective drainage area, steady state skin effect, average fracture conductivity, and effective fracture half-length.
- Figure 1 shows a flow chart of the workflow for the in accordance with an embodiment of the invention.
- the commingled production data in multilayer reservoir is properly allocated to each of completed intervals in the system using multi-rate production log information.
- US7062420 and US7089167 describe methods of allocating data to multilayer commingled reservoirs.
- the production allocation methodology requires the commingled well production data, the well head flowing temperature and pressures, the wellbore completion and tubular component descriptions, and production log information.
- the next step 12 is the validation of the production log information. If only production log information for a single well flow rate is only available then the workflow in this invention is not applicable 14 and the computations are terminated. Otherwise if multi-rate production log information is available then the analysis can proceed to the next step 16.
- the reservoir and fracture properties are calculated using the transient and stabilized inflow performance relationship based in the multi-rate production log information. Such methods are described in SPE 104018 and SPE 68141.
- next step 20 is recalibrating the of the commingled and individual layer production performance histories by accounting for the individual completed interval reservoir and fracture properties that are already known or previously calculated. This may be done by approximating the values of some of the reservoir and/or fracture properties and then subsequently updating and correcting the relative input parameter estimates for every layer in the commingled reservoir system. This results in well production performance values for each layer in the commingled reservoir system. These values can be used 22 separately for further or additional production performance optimization and forecasting purposes.
- the methodology allows consideration of non-Darcy fluid flow in the reservoir or hydraulic fractures in the individual layer performance analysis can also be taken into account to more accurately and reliably establish the reservoir and well completion properties for highly productive oil and gas producing formation in the commingled multilayered reservoir system.
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- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
- Pipeline Systems (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A method for optimizing reservoir production in a commingled hydraulically fractured reservoir comprising: allocating commingled system production data to each of the individual completed intervals in the system; calculating the reservoir and fracture properties for each completed reservoir layer; recalibrating the commingled and individual layer production data by accounting for the individual completed interval reservoir and fracture properties.
Description
Method for optimizing reservoir production analysis
This invention relates to methods for optimizing the overall reservoir production. In particular, the invention relates to the use of reservoir and fracture properties in the analysis of production performance of multilayer commingled reservoirs. Background art
Reservoir characterization and well completion efficiency evaluation in a multilayer commingled system and well production performance data and periodic production log measurements is a very important task. Commingled well production data from a system with a number of different layers with varying reservoir and well completion properties should not in general be evaluated using an equivalent single layer reservoir analog. The results of such an analysis for determining estimates of the reservoir properties and completion efficiencies of each of the individual reservoir layers in this case will be very inaccurate.
There are various methods of allocating commingled production data for individual reservoir layer production performance analyses. One of the most efficient and reliable methods of allocating the commingled well production data to the individual completed intervals in the system is by using periodically obtained multi-rate production logging information. The allocation of the commingled production data to generate the individual completed interval production histories is required for the proper evaluation of the reservoir properties and well completion properties for every layer, such as the reservoir effective permeability, well effective drainage area, and steady state skin effect. In the case of a hydraulically fractured completed reservoir layer in the well, it permits the proper evaluation in each completed reservoir layer of such properties as the average effective fracture conductivity and the effective fracture half-length.
The data used in this analysis method are the commingled reservoir system production data (fluid phase flow rates), the wellhead flowing temperatures and pressures, the complete wellbore and tubular goods description and production log information. These values are used in a computational analysis to construct the equivalent individual completed interval production histories that can subsequently be used for the evaluation of the reservoir and completion properties
in each of the completed reservoir layers. Obviously, many of these reservoir and well completion properties also affect the allocation of the commingled reservoir production data.
US6101447, US6691037, US6842700, US5960369 and US6571619 propose methods for obtaining improved well production optimization based on type curves methods, history matching, and other methods for reducing the non- uniqueness of solution. These methods can be applied to different types of reservoirs, such as a conventional reservoir, a tight gas reservoir, and where only incomplete pressure/rate history records are available. These methods only consider that the production performance of a single reservoir layer in the system. It is an object of the invention to provide an improved methodology that can be applied to multi-layer reservoir systems. Disclosure of the invention
Accordingly a first aspect of the invention comprises a method for optimizing reservoir production in a commingled hydraulically fractured reservoir comprising: allocating commingled system production data to each of the individual completed intervals in the system; calculating the reservoir and fracture properties for each completed reservoir layer; recalibrating the commingled and individual layer production data by accounting for the individual completed interval reservoir and fracture properties.
Preferably the reservoir and fracture properties are calculated using the transient and stabilized inflow performance relationship established using the multi-rate production log information.
The individual layer production data may be accounted for by using approximate values of the reservoir and/or fracture properties and then updating and correcting the relative input parameter estimates for every layer in the commingles reservoir system.
The reservoir and fracture properties may comprise effective permeability, initial reservoir pressure, reservoir effective drainage area, steady state skin effect, average fracture conductivity and/or effective fracture half-length.
The production data may comprise commingled well production data, wellhead flowing temperatures and/or pressures, the description of the complete wellbore and its tubular components and/or production log information.
Preferably allocating commingled production data to of the completed intervals in the system comprises using multi-rate production log information.
The method can further comprise using the well production performance data derived for each layer in the commingled system for further production performance optimization and forecasting. Brief description of the drawings
Figure 1 shows a flowchart of the workflow for the optimisation of overall reservoir production. Mode(s) for carrying out the invention
The invention provides a method to maximize the efficiency of the reservoir production data analysis by using the allocation of the commingled production data in a commingled multilayer hydraulically fractured reservoir with multi-rate production log information.
An additional step in the production data allocation using modern multi- rate production logs to establish the inflow performance behaviour of each of the completed intervals in the well is performed to maximise the efficiency of the reservoir production data analysis. The additional step involves the calculation of the reservoir and fracture properties for each completed reservoir layer from the inflow performance behaviour of each of the completed intervals in the system and the further recalibration of the production data allocation taking into account the reservoir and fracture properties. This results in a more reliable production performance allocation for each completed layer in the system, and as a result a better optimization of the overall reservoir production.
The commingled system performance data allocation process takes into account the reservoir and fracture properties such as the effective permeability, initial reservoir pressure, reservoir effective drainage area, steady state skin effect, average fracture conductivity, and effective fracture half-length.
By being able to use these properties in the production data allocation process leads to more reliable computation of the production performance data of each of the layers in the commingles multilayer reservoir. More reliable calculation
of the production performance data for each layer in the commingled system leads to improved efficiency and accuracy of the production forecasts of the commingles system, as well as optimum efficiency obtained in the well stimulation candidate recognition process.
Figure 1 shows a flow chart of the workflow for the in accordance with an embodiment of the invention. In the first step 10 the commingled production data in multilayer reservoir is properly allocated to each of completed intervals in the system using multi-rate production log information. US7062420 and US7089167 describe methods of allocating data to multilayer commingled reservoirs. The production allocation methodology requires the commingled well production data, the well head flowing temperature and pressures, the wellbore completion and tubular component descriptions, and production log information.
The next step 12 is the validation of the production log information. If only production log information for a single well flow rate is only available then the workflow in this invention is not applicable 14 and the computations are terminated. Otherwise if multi-rate production log information is available then the analysis can proceed to the next step 16.
If the required reservoir and fracture properties are already known or can be readily obtained via another means then you can then proceed to the next step 20. If not the reservoir and fracture properties for each layer are calculated 18. The reservoir and fracture properties are calculated using the transient and stabilized inflow performance relationship based in the multi-rate production log information. Such methods are described in SPE 104018 and SPE 68141.
Once reservoir and production properties are available the next step 20 is recalibrating the of the commingled and individual layer production performance histories by accounting for the individual completed interval reservoir and fracture properties that are already known or previously calculated. This may be done by approximating the values of some of the reservoir and/or fracture properties and then subsequently updating and correcting the relative input parameter estimates for every layer in the commingled reservoir system.
This results in well production performance values for each layer in the commingled reservoir system. These values can be used 22 separately for further or additional production performance optimization and forecasting purposes.
The methodology allows consideration of non-Darcy fluid flow in the reservoir or hydraulic fractures in the individual layer performance analysis can also be taken into account to more accurately and reliably establish the reservoir and well completion properties for highly productive oil and gas producing formation in the commingled multilayered reservoir system.
Further variations within the scope of the invention will be apparent.
Claims
1. A method for optimizing reservoir production in a commingled hydraulically fractured reservoir comprising: allocating commingled system production data to each of the individual completed intervals in the system; calculating the reservoir and fracture properties for each completed reservoir layer; recalibrating the commingled and individual layer production data by accounting for the individual completed interval reservoir and fracture properties.
2. A method according to claim 1 wherein the reservoir and fracture properties are calculated using the transient and stabilized inflow performance relationship established using the multi-rate production log information.
3. A method according to claims 1 or 2 wherein accounting for the individual layer production data comprises using approximate values of the reservoir and/or fracture properties and then updating and correcting the relative input parameter estimates for every layer in the commingles reservoir system.
4. A method according to any of the preceding claims wherein the reservoir and fracture properties comprise effective permeability, initial reservoir pressure, reservoir effective drainage area, steady state skin effect, average fracture conductivity and/or effective fracture half-length.
5. A method according to any of the preceding claims wherein the production data comprises commingled well production data, wellhead flowing temperatures and/or pressures, the description of the complete wellbore and its tubular components and/or production log information.
6. A method according to any of the preceding claims wherein allocating commingled production data to of the completed intervals in the system comprises using multi-rate production log information.
7. A method according to any of the preceding claims further comprising using the well production performance data derived for each layer in the commingled system for further production performance optimization and forecasting.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/RU2008/000387 WO2009154500A1 (en) | 2008-06-19 | 2008-06-19 | Method for optimizing reservoir production analysis |
| US12/996,647 US20110155369A1 (en) | 2008-06-19 | 2008-06-19 | Method for optimizing reservoir production analysis |
| RU2010153367/03A RU2478783C2 (en) | 2008-06-19 | 2008-06-19 | Method to produce hydrocarbons from well stretching via multilayer reservoir with hydraulic rupture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/RU2008/000387 WO2009154500A1 (en) | 2008-06-19 | 2008-06-19 | Method for optimizing reservoir production analysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009154500A1 true WO2009154500A1 (en) | 2009-12-23 |
Family
ID=41434263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RU2008/000387 WO2009154500A1 (en) | 2008-06-19 | 2008-06-19 | Method for optimizing reservoir production analysis |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20110155369A1 (en) |
| RU (1) | RU2478783C2 (en) |
| WO (1) | WO2009154500A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288571A (en) * | 2017-07-06 | 2017-10-24 | 中国石油天然气股份有限公司 | A kind of gas well integrated form layering distribution and pressure measurement technique |
| CN109667568A (en) * | 2018-12-29 | 2019-04-23 | 中国石油大学(华东) | A kind of determination method and device combined for interval in stratified injection water technology |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2943970A1 (en) * | 2014-04-30 | 2015-11-05 | Landmark Graphics Corporation | Forecasting production data for existing wells and new wells |
| CN111798328A (en) * | 2019-03-22 | 2020-10-20 | 中国石油化工股份有限公司 | Method for calculating five-point well pattern instantaneous yield of low-permeability oil reservoir |
| US11708754B2 (en) * | 2020-05-11 | 2023-07-25 | Saudi Arabian Oil Company | Systems and methods for generating a drainage radius log |
| US11840927B2 (en) | 2020-09-18 | 2023-12-12 | Saudi Arabian Oil Company | Methods and systems for gas condensate well performance prediction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1461891A1 (en) * | 1987-07-27 | 1989-02-28 | Государственный Геофизический Трест "Татнефтегеофизика" | Method of determining depletion parameters of oil formation |
| US5305209A (en) * | 1991-01-31 | 1994-04-19 | Amoco Corporation | Method for characterizing subterranean reservoirs |
| RU2119583C1 (en) * | 1997-04-07 | 1998-09-27 | Внедренческий научно-исследовательский инженерный центр "Нефтегазтехнология" | Method for monitoring development of oil deposits |
| RU2274747C2 (en) * | 2000-10-04 | 2006-04-20 | Шлюмбергер Текнолоджи Б.В. | Optimization method for oil production from multilayer compound beds with the use of dynamics of oil recovery from compound beds and geophysical production well investigation data |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU964117A1 (en) * | 1977-03-09 | 1982-10-07 | Казанский государственный университет им.Ульянова-Ленина | Method of determining collector properties of formations of gas and water deposit |
| RU2072031C1 (en) * | 1993-11-10 | 1997-01-20 | Татарский Государственный Научно-Исследовательский И Проектный Институт Нефтяной Промышленности | Method for exploration of multi-seam oil deposit with reservoirs of different structure type |
| US5960369A (en) * | 1997-10-23 | 1999-09-28 | Production Testing Services | Method and apparatus for predicting the fluid characteristics in a well hole |
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| DZ3413A1 (en) * | 2000-09-12 | 2002-03-21 | Sofitech Nv | EVALUATION OF MULTI-LAYERED AMALGAMATED TANK AND HYDRAULIC FRACTURE PROPERTIES USING AMALGAMATED TANK PRODUCTION DATA AND PRODUCTION LOGGING INFORMATION |
| US6571619B2 (en) * | 2001-10-11 | 2003-06-03 | Schlumberger Technology Corporation | Real time petrophysical evaluation system |
| EA006215B1 (en) * | 2002-05-31 | 2005-10-27 | Шлюмбергер Текнолоджи Б.В. | Method and apparatus for effective well and reservoir evaluation without the need for well pressure history |
| US6691037B1 (en) * | 2002-12-12 | 2004-02-10 | Schlumberger Technology Corporation | Log permeability model calibration using reservoir fluid flow measurements |
| RU2263211C1 (en) * | 2004-03-04 | 2005-10-27 | Арбузов Владимир Михайлович | Control method for multizone reservoir development |
| RU2290507C2 (en) * | 2005-01-11 | 2006-12-27 | Открытое акционерное общество "Сургутнефтегаз" | Method for determining filtration parameters of complex build collectors and multi-layer objects |
| RU2285790C1 (en) * | 2005-04-12 | 2006-10-20 | Закрытое акционерное общество "УфаНИПИнефть" | Method to control stacked pool oil deposit development with the use of residual net oil maps |
-
2008
- 2008-06-19 WO PCT/RU2008/000387 patent/WO2009154500A1/en active Application Filing
- 2008-06-19 RU RU2010153367/03A patent/RU2478783C2/en not_active IP Right Cessation
- 2008-06-19 US US12/996,647 patent/US20110155369A1/en not_active Abandoned
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1461891A1 (en) * | 1987-07-27 | 1989-02-28 | Государственный Геофизический Трест "Татнефтегеофизика" | Method of determining depletion parameters of oil formation |
| US5305209A (en) * | 1991-01-31 | 1994-04-19 | Amoco Corporation | Method for characterizing subterranean reservoirs |
| RU2119583C1 (en) * | 1997-04-07 | 1998-09-27 | Внедренческий научно-исследовательский инженерный центр "Нефтегазтехнология" | Method for monitoring development of oil deposits |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288571A (en) * | 2017-07-06 | 2017-10-24 | 中国石油天然气股份有限公司 | A kind of gas well integrated form layering distribution and pressure measurement technique |
| CN107288571B (en) * | 2017-07-06 | 2020-08-11 | 中国石油天然气股份有限公司 | Integrated layered gas distribution and pressure measurement process for gas well |
| CN109667568A (en) * | 2018-12-29 | 2019-04-23 | 中国石油大学(华东) | A kind of determination method and device combined for interval in stratified injection water technology |
| CN109667568B (en) * | 2018-12-29 | 2021-05-11 | 中国石油大学(华东) | Method and device for determining layer section combination in layered water injection process |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2010153367A (en) | 2012-07-27 |
| US20110155369A1 (en) | 2011-06-30 |
| RU2478783C2 (en) | 2013-04-10 |
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