CN106996287B - Injection-production well pattern arrangement method for irregular triangular oil reservoir - Google Patents
Injection-production well pattern arrangement method for irregular triangular oil reservoir Download PDFInfo
- Publication number
- CN106996287B CN106996287B CN201710428224.6A CN201710428224A CN106996287B CN 106996287 B CN106996287 B CN 106996287B CN 201710428224 A CN201710428224 A CN 201710428224A CN 106996287 B CN106996287 B CN 106996287B
- Authority
- CN
- China
- Prior art keywords
- well
- oil reservoir
- injection
- triangle
- gravity center
- 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
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Abstract
The invention discloses an injection-production well pattern arrangement method of an irregular triangular oil reservoir, which comprises the following steps: (a) according to the outline shape of the oil reservoir, the oil reservoir is sketched into a triangular structure, and each vertex, each side midpoint and the gravity center of the triangle are marked; (b) arranging water injection wells at each vertex, each side midpoint and the gravity center of the triangle; (c) and arranging production wells on connecting lines of the gravity center of the triangle and each vertex and connecting lines of the gravity center and the midpoints of the sides. The invention aims to provide an injection-production well pattern arrangement method for an irregular triangular oil reservoir, which aims to solve the problem that the injection-production well pattern arrangement of the triangular oil reservoir easily causes low exploitation efficiency in the prior art and realize the purposes of improving the recovery ratio of the triangular oil reservoir and reducing the water content of produced liquid.
Description
Technical Field
The invention relates to the field of well patterns of oil and gas fields, in particular to an injection-production well pattern arrangement method of an irregular triangular oil reservoir.
Background
The well pattern refers to the distribution mode of oil, gas and water injection wells in the development process of oil and gas fields, is an important link in the development scheme of oil and gas reservoirs, and relates to the development efficiency, the ultimate recovery rate and the economic benefit of oil field development. In the prior art, for the arrangement mode of the oil reservoir well pattern, firstly, the required production well number is obtained by dividing the total geological reserve of the oil reservoir by the single well control reserve obtained by the conventional well test, and then, based on the required production well number, one row of production wells corresponds to one row of water injection wells, so that a latticed well pattern arrangement structure with evenly distributed injection and production wells is designed. The arrangement mode has better recovery efficiency for oil reservoirs with regular structures, particularly oil reservoirs with approximate square and round shapes. However, for an irregular triangular oil reservoir, due to the special shape of the trap structure of the triangular oil reservoir, the conventional grid-type well pattern arrangement is adopted, so that the problems of low recovery rate, quick water breakthrough of an oil well, and even incapability of continuing water injection and water flooding at the middle stage of oil field exploitation are easily caused, and the exploitation efficiency is seriously influenced.
Disclosure of Invention
The invention aims to provide an injection-production well pattern arrangement method for an irregular triangular oil reservoir, which aims to solve the problem that the injection-production well pattern arrangement of the triangular oil reservoir easily causes low exploitation efficiency in the prior art and realize the purposes of improving the recovery ratio of the triangular oil reservoir and reducing the water content of produced liquid.
The invention is realized by the following technical scheme:
the injection-production well pattern arrangement method of the irregular triangular oil reservoir comprises the following steps:
(a) according to the outline shape of the oil reservoir, the oil reservoir is sketched into a triangular structure, and each vertex, each side midpoint and the gravity center of the triangle are marked;
(b) arranging water injection wells at each vertex, each side midpoint and the gravity center of the triangle;
(c) and arranging production wells on connecting lines of the gravity center of the triangle and each vertex and connecting lines of the gravity center and the midpoints of the sides.
Aiming at the problem that the injection-production well pattern arrangement of a triangular oil reservoir easily causes low exploitation efficiency in the prior art, the invention provides an injection-production well pattern arrangement method of an irregular triangular oil reservoir. Then water injection wells are arranged at each vertex, each middle point of each side and the gravity center of the triangle, wherein the gravity center of the triangle is known as the intersection point of the three middle lines. The top points are turning points of the oil reservoir, so that the water injection wells are arranged at the top points to ensure that oil and gas in the oil reservoir are driven to the center; the water injection wells are arranged at the middle points of the edges, so that the barrier effect of the edges of the oil reservoir is enhanced, the oil gas is prevented from being scattered and overflowed from the edges, and the oil gas is driven to the central position from the edges; the water injection well is arranged at the center of gravity position, so that the middle part of the oil deposit can provide a driving force for scattering and overflowing all around, and oil and gas are driven to the production wells distributed in the oil deposit. The production well is arranged on a connecting line of the gravity center and each vertex and a connecting line of the gravity center and the midpoint of each side. The production wells are distributed in a diverging manner outwards by taking the gravity center as a center point, the diverging directions are carried out along the connecting line of the gravity center and each vertex and the connecting line of the gravity center and each side midpoint, six diverging directions are provided, and the production wells are arranged along a straight line according to the length of each section of distance in the six diverging directions. The arrangement mode enables narrow zones and production wells in the triangle to be fewer; the large-area and large-quantity production wells can make the single well obtain larger effective control reserves, and the problem that the traditional grid well pattern arrangement mode causes large and small control reserves of the single well in the triangular oil reservoir is solved, so that the overall recovery ratio of the triangular oil reservoir is greatly improved. Meanwhile, the water injection wells are only arranged at the gravity center in the oil reservoir, and the rest water injection wells are all located at the edge positions, so that the problem that the water content is higher than that of a conventional square or round oil reservoir in the existing narrow triangular oil reservoir exploitation process can be solved, the water breakthrough time of an oil well is delayed, and the water content is reduced.
Further, the method also comprises the step of arranging auxiliary water injection wells between the top points and the middle points of the triangle. Through arranging the auxiliary water injection well, the edge of the oil reservoir is more thoroughly plugged, the oil and gas are prevented from overflowing outside the trap, more powerful drive is provided, and the recovery ratio of the production well in the oil reservoir is further improved.
Preferably, the wellbore trajectory of the production well on the line connecting the gravity center of the triangle and each vertex is set as a vertical well, and the wellbore trajectory of the production well on the line connecting the gravity center of the triangle and the midpoint of each side is set as an extended reach well or a horizontal well. The production well on the connecting line of the gravity center of the triangle and the middle point of each side is an extended reach well or a horizontal well, and the characteristics of high control and high yield of the extended reach well or the horizontal well are utilized to improve the single well control reserve, so that the overall recovery ratio of the oil field is improved. Meanwhile, the production wells on the connecting lines of the gravity center and each vertex are arranged to be vertical wells, and the problem that the whole cost is too high due to the fact that extended reach wells or horizontal wells are adopted in the oil reservoir is solved. The mode that adopts vertical well and large displacement well or horizontal well to arrange in turn sets up the production well, can also ensure that the oil reservoir has three-dimensional mobile form, avoids oil gas to form the problem that flows between the simple layer and lead to the harvesting position too little.
Preferably, the water injection amount of the auxiliary water injection well is adjusted to be less than or equal to 1/2 of the water injection well during the production process. The main function of the auxiliary water injection well lies in blocking oil gas from overflowing from the edge of the oil deposit, so that the water injection amount of the auxiliary water injection well is smaller than that of a conventional water injection well, and the phenomenon that the water content is abnormally increased in advance due to the fact that excessive water is injected into the oil deposit is avoided.
And further reserving adjusting well positions on connecting lines of the gravity centers of the triangles and the auxiliary water injection wells, and protecting the adjusting well positions by erecting fences. After the oil and gas field is put into development for several years, in order to improve the reserve utilization degree and improve the recovery efficiency, the well which needs to be drilled in an encrypted manner is called as an adjusting well. The traditional well position of the adjusting well is directly encrypted at the later stage of exploitation, and is not reserved, so that the problems that the underground collision prevention risk is large, the well position is inconvenient to arrange, the field construction is difficult to meet and the like are easily caused at the later stage. The well position of the adjusting well is reserved on the connecting line of the triangular gravity center and each auxiliary water injection well, other well positions are not arranged on the connecting line, enough drilling and production space can be provided for the later stage no matter the water injection adjusting well or the development adjusting well, the underground anti-collision risk can be avoided, and the problem of difficulty in later-stage exploitation of the oil field is solved to a great extent.
Preferably, the projection of the borehole trajectory of the extended reach well or the horizontal well in the oil interval on the horizontal plane is perpendicular to the line connecting the gravity center of the triangle and the midpoint of each side. The single well control area of the extended reach well or the horizontal well is increased, the well completion position of the extended reach well or the horizontal well is further diverged in the oil reservoir, and therefore the recovery ratio is increased.
Preferably, the sequence of step (b) and step (c) is adjustable.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the injection-production well pattern arrangement method of the irregular triangular oil reservoir, the water injection wells are arranged at the vertexes and used for displacing oil towards the interior of the trap, and the vertexes are turning points of the oil reservoir, so that the water injection wells are arranged at the vertexes and ensure that oil and gas in the oil reservoir are driven towards the center; the water injection wells are arranged at the middle points of the edges, so that the barrier effect of the edges of the oil reservoir is enhanced, the oil gas is prevented from being scattered and overflowed from the edges, and the oil gas is driven to the central position from the edges; the water injection well is arranged at the center of gravity position, so that the middle part of the oil deposit can provide a driving force for scattering and overflowing all around, and oil and gas are driven to the production wells distributed in the oil deposit.
2. According to the injection-production well pattern arrangement method of the irregular triangular oil reservoir, the number of the production wells in a narrower area in the triangle is small by the arrangement mode of the production wells; the large-area and large-quantity production wells can make the single well obtain larger effective control reserves, and the problem that the traditional grid well pattern arrangement mode causes large and small control reserves of the single well in the triangular oil reservoir is solved, so that the overall recovery ratio of the triangular oil reservoir is greatly improved.
3. The injection-production well pattern arrangement method of the irregular triangular oil reservoir can solve the problem that the water content is higher than that of a conventional square or round oil reservoir in the existing narrow triangular oil reservoir exploitation process, delay the water breakthrough time of an oil well and reduce the water content.
4. According to the injection-production well pattern arrangement method for the irregular triangular oil reservoir, well positions of the adjusting wells are reserved on the connecting line between the gravity center of the triangle and each auxiliary water injection well, other well positions are not arranged on the connecting line, enough drilling and production space can be provided for the later stage no matter the water injection adjusting wells or the development adjusting wells, the underground collision prevention risk is avoided, and the problem that the later-stage exploitation of the oil field is difficult is solved to a great extent.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic layout of an embodiment of the present invention;
FIG. 2 is a schematic flow chart of an embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
1-water injection well, 2-production well, 3-auxiliary water injection well and 4-well position adjustment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
the injection-production well pattern arrangement method of the irregular triangular oil reservoir shown in fig. 1 and fig. 2 comprises the following steps: (a) according to the outline shape of the oil reservoir, the oil reservoir is sketched into a triangular structure, and each vertex, each side midpoint and the gravity center of the triangle are marked; (b) arranging water injection wells 1 at each vertex, each side midpoint and the gravity center of the triangle; (c) and the production wells 2 are arranged on the connecting lines of the gravity centers of the triangles and the vertexes and the connecting lines of the gravity centers and the midpoints of the sides. And arranging auxiliary water injection wells 3 between the top points and the middle points of the edges of the triangle. And setting the borehole trajectory of the production well on the connecting line of the gravity center of the triangle and each vertex as a vertical well, and setting the borehole trajectory of the production well on the connecting line of the gravity center of the triangle and each midpoint of the sides as an extended reach well or a horizontal well. And in the process of production, adjusting the water injection quantity of the auxiliary water injection well to be less than or equal to 1/2 of the water injection well. And reserving an adjusting well position 4 on a connecting line of the gravity center of the triangle and each auxiliary water injection well, and protecting the adjusting well position and erecting a fence. The projection of the borehole trajectory of the extended reach well or the horizontal well in the oil interval on the horizontal plane is perpendicular to the connecting line of the gravity center of the triangle and the middle point of each side. The triangles shown in fig. 1 represent production wells 2, the squares represent adjustment well locations 4, the larger circles represent injection wells 1, the smaller circles represent auxiliary injection wells 3, the dotted auxiliary lines for ease of viewing, and the peripheral triangles represent an elongated triangular reservoir. In the embodiment, the water injection wells are arranged at the vertexes for displacing oil towards the interior of the trap, and the vertexes are turning points of the oil reservoir, so that the water injection wells are arranged at the vertexes to ensure that oil and gas in the oil reservoir are driven towards the center; the water injection wells are arranged at the middle points of the edges, so that the barrier effect of the edges of the oil reservoir is enhanced, the oil gas is prevented from being scattered and overflowed from the edges, and the oil gas is driven to the central position from the edges; the water injection well is arranged at the center of gravity position, so that the middle part of the oil deposit can provide a driving force for scattering and overflowing all around, and oil and gas are driven to the production wells distributed in the oil deposit. The arrangement structure of the production wells ensures that the narrower zone in the triangle and the production wells are fewer; the large-area and large-quantity production wells can make the single well obtain larger effective control reserves, and the problem that the traditional grid well pattern arrangement mode causes large and small control reserves of the single well in the triangular oil reservoir is solved, so that the overall recovery ratio of the triangular oil reservoir is greatly improved. In addition, the method can also solve the problem that the water content is higher than that of the conventional square or round oil reservoir in the existing narrow triangular oil reservoir exploitation process, delay the water breakthrough time of an oil well and reduce the water content. The well position of the adjusting well is reserved on the connecting line of the triangular gravity center and each auxiliary water injection well, other well positions are not arranged on the connecting line, enough drilling and production space can be provided for the later stage no matter the water injection adjusting well or the development adjusting well, the underground anti-collision risk can be avoided, and the problem of difficulty in later-stage exploitation of the oil field is solved to a great extent.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The injection-production well pattern arrangement method of the irregular triangular oil reservoir is characterized by comprising the following steps of:
(a) according to the outline shape of the oil reservoir, the oil reservoir is sketched into a triangular structure, and each vertex, each side midpoint and the gravity center of the triangle are marked;
(b) arranging water injection wells at each vertex, each side midpoint and the gravity center of the triangle;
(c) arranging production wells on connecting lines of the gravity center of the triangle and each vertex and connecting lines of the gravity center and the midpoints of each side;
further comprising: arranging auxiliary water injection wells between the top points and the middle points of the edges of the triangle;
and the well track of the production well on the connecting line of the gravity center of the triangle and the middle point of each side is set as a vertical well, and the well track of the production well on the connecting line of the gravity center of the triangle and the middle point of each side is set as an extended reach well or a horizontal well.
2. The injection-production well pattern arrangement method of the irregular triangular oil reservoir as claimed in claim 1, wherein the injection amount of the auxiliary injection well is adjusted to be less than or equal to 1/2 of the injection well during the production process.
3. The injection-production well pattern arrangement method of the irregular triangular oil reservoir according to claim 1, further comprising: and reserving adjusting well positions on connecting lines of the gravity centers of the triangles and the auxiliary water injection wells, and protecting the adjusting well positions by erecting fences.
4. The injection-production well pattern arrangement method of the irregular triangular oil reservoir according to claim 1, characterized in that the projection of the borehole trajectory of the extended reach well or the horizontal well in the oil interval on the horizontal plane is perpendicular to the connecting line of the center of gravity of the triangle and the midpoint of each side.
5. The method for arranging the injection-production well pattern of the irregular triangular oil reservoir as claimed in claim 1, wherein the sequence of the step (b) and the step (c) is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710428224.6A CN106996287B (en) | 2017-06-08 | 2017-06-08 | Injection-production well pattern arrangement method for irregular triangular oil reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710428224.6A CN106996287B (en) | 2017-06-08 | 2017-06-08 | Injection-production well pattern arrangement method for irregular triangular oil reservoir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106996287A CN106996287A (en) | 2017-08-01 |
| CN106996287B true CN106996287B (en) | 2020-03-27 |
Family
ID=59436081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710428224.6A Active CN106996287B (en) | 2017-06-08 | 2017-06-08 | Injection-production well pattern arrangement method for irregular triangular oil reservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106996287B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107766978B (en) * | 2017-10-23 | 2020-03-17 | 南京特雷西能源科技有限公司 | Intelligent optimization method for irregular well pattern |
| CN107957987B (en) * | 2017-11-28 | 2022-11-25 | 北京金双狐油气技术有限公司 | Method for automatically typesetting well marking data by using mesh subdivision technology |
| CN110306968A (en) * | 2018-03-27 | 2019-10-08 | 中国石油化工股份有限公司 | Irregular well pattern optimization method and its computer readable storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1167465A (en) * | 1968-02-08 | 1969-10-15 | Texaco Development Corp | A Method for the Recovery of Hydrocarbons |
| CN1786411A (en) * | 2005-12-12 | 2006-06-14 | 大庆油田有限责任公司 | Method for optimizing area well net of enhancing lowest permeable reservoir oil extracting amount |
| CN101595273A (en) * | 2006-10-13 | 2009-12-02 | 埃克森美孚上游研究公司 | The well that is used for the optimization of original position shale oil exploitation is arranged |
| CN103790565A (en) * | 2012-10-29 | 2014-05-14 | 中国石油化工股份有限公司 | Complicated fault block oil reservoir development well pattern optimizing design method |
| CN105239989A (en) * | 2015-10-10 | 2016-01-13 | 中国石油天然气股份有限公司 | Oil recovery method |
| CN105756654A (en) * | 2015-12-30 | 2016-07-13 | 中国石油大学(华东) | Water-drive reservoir well network optimization design method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002364942A1 (en) * | 2001-10-24 | 2003-06-30 | Shell Internationale Research Maatschappij B.V. | Soil remediation well positioning in relation to curved obstructions |
-
2017
- 2017-06-08 CN CN201710428224.6A patent/CN106996287B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1167465A (en) * | 1968-02-08 | 1969-10-15 | Texaco Development Corp | A Method for the Recovery of Hydrocarbons |
| CN1786411A (en) * | 2005-12-12 | 2006-06-14 | 大庆油田有限责任公司 | Method for optimizing area well net of enhancing lowest permeable reservoir oil extracting amount |
| CN101595273A (en) * | 2006-10-13 | 2009-12-02 | 埃克森美孚上游研究公司 | The well that is used for the optimization of original position shale oil exploitation is arranged |
| CN103790565A (en) * | 2012-10-29 | 2014-05-14 | 中国石油化工股份有限公司 | Complicated fault block oil reservoir development well pattern optimizing design method |
| CN105239989A (en) * | 2015-10-10 | 2016-01-13 | 中国石油天然气股份有限公司 | Oil recovery method |
| CN105756654A (en) * | 2015-12-30 | 2016-07-13 | 中国石油大学(华东) | Water-drive reservoir well network optimization design method |
Non-Patent Citations (3)
| Title |
|---|
| 三角形小断块稠油油藏注采井网优化研究;田鸿照等;《重庆科技学院学报（自然科学版）》;20150430;第17卷(第2期);第52-54页 * |
| 刘桂玲等.高邮凹陷南断阶不规则油藏井网优化研究.《石油天然气学报（江汉石油学院学报）》.2013,第35卷(第11期),第108-111页. * |
| 高邮凹陷南断阶不规则油藏井网优化研究;刘桂玲等;《石油天然气学报（江汉石油学院学报）》;20131130;第35卷(第11期);第108-111页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106996287A (en) | 2017-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106996287B (en) | Injection-production well pattern arrangement method for irregular triangular oil reservoir | |
| CN107387053B (en) | Method for collaborative fracturing of main cracks and complex crack network of large channel | |
| CN101818620B (en) | Mining method for maximum reservoir contact well | |
| CN102606129B (en) | Method and system for thin interbed oilfield development | |
| CN107435535B (en) | A method of exploitation high dip angle heavy crude reservoir is driven using plane gravity | |
| CN102071922B (en) | Low permeable oil deposit virtual horizontal well development method | |
| CN107975357A (en) | The well pattern structure and oil production method of super-heavy oil deposit | |
| CN104100244A (en) | Well spacing method for coal bed gas communication well groups and application of well spacing method in fracturing yield increase | |
| CN103256025A (en) | Composite well net type coal bed gas mining method | |
| CN109281642B (en) | Method for improving multi-layer oil reservoir development effect after polymer flooding | |
| CN201763308U (en) | Fishbone well type structure | |
| CN105089594A (en) | Water-control effect-enhancing fracturing method of carbonate reservoir | |
| CN207093050U (en) | A kind of gas drive well pattern structure of high water cut rate high inclination-angle LOW PERMEABILITY RESERVOIR | |
| CN106996288B (en) | Triangular oil reservoir injection-production well pattern arrangement | |
| CN108331558B (en) | Horizontal well for gas layer and drilling and fracturing method of horizontal well | |
| CN104343453A (en) | Filling mining method of slowly-inclined medium-thick ore deposit | |
| CN206513360U (en) | A kind of three-dimensional well pattern structure | |
| CN103670423B (en) | A kind of method of tunneling on stratiform phyllite rock mass | |
| CN206144547U (en) | Hyposmosis oil reservoir well pattern structure | |
| CN106761406A (en) | A kind of ground L-type mash gas pumping drilling | |
| CN103628848A (en) | Multidirectional interlayer water flooding displacement oil extraction method and system | |
| CN107013202B (en) | Flooding pattern distributed architecture suitable for diamond shape trap | |
| CN207004504U (en) | A kind of flooding pattern arrangement of rhombus trap | |
| US20170247990A1 (en) | Method for drilling and fracture treating multiple wellbores | |
| CN207004492U (en) | Distributed architecture is adopted suitable for the note of sealene triangle oil reservoir |
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 |