CN103161439A - Horizontal segment updip well group - Google Patents
Horizontal segment updip well group Download PDFInfo
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- CN103161439A CN103161439A CN2011104069996A CN201110406999A CN103161439A CN 103161439 A CN103161439 A CN 103161439A CN 2011104069996 A CN2011104069996 A CN 2011104069996A CN 201110406999 A CN201110406999 A CN 201110406999A CN 103161439 A CN103161439 A CN 103161439A
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Abstract
The invention relates to a well drilling method of a horizontal segment updip well group of well bore sections in well drilling of petroleum, natural gas, coalbed methane, shale gas and oil sand. The horizontal segment updip well group comprises a vertical well and N horizontal wells (N=1, 2, 3 ...), wherein the vertical well is drilled in the center of the horizontal segment updip well group, and the bottom of the vertical well is communicated with the tail ends of the horizontal segments of other wells. The horizontal wells are characterized in that the horizontal segments are inclined upwards, the design method can achieve that reservoir stratums are distributed gently or inclined towards the direction of a drilling machine, and the horizontal wells and large displacement wells are drilled on structures having quite unstable top stratums. Besides, during oil extraction production, oil gas flows upwards, and the problems that water production, sand production, water blocking and sand blocking prematurely occur in horizontal segment updip horizontal wells are resolved.
Description
Technical field
The present invention relates to the boring method of the casing program horizontal segment updip well group in a kind of oil, natural gas, coal bed gas, shale gas, oil-sand drilling well.
Technical background
In oil, natural gas, coal bed gas, shale gas, oil-sand Drilling Design, often run into reservoir distribution mild or to the rig direction tilt (reduction), the unsettled situation in stratum at its top, for example, the top of adjacent reservoir have easily collapse, the water layer of easily expansion, high pressure or low pressure, under these circumstances, be infeasible substantially at the top of reservoir horizontal well drilling and extended reach well.Although the casing program method for designing of conventional " horizontal segment updip horizontal well " can be alleviated or solve the impact of this Geological Defects, get out the well section of growing at oily reservoir, but making gas stream at first to flow to oblique below, this well just can reach ground, in the situation that water or sand are arranged in well, this type of flow of oil gas certainly will promote water and sand flows earthward together, thereby, cause too early water outlet and the problem of shaking out, reduced oil and gas production and productivity effect.
In addition, the front portion of " horizontal segment updip horizontal well " is lower, and the water that density is larger, sand make gas channel become narrow or/and piece is fallen on the stratum is tending towards resulting in blockage in this well section deposition, and when serious, well blocks fully.For such obstruction, the production of hydrocarbons of just having to stop is carried out the drifting operation.
Summary of the invention
The object of the invention is to propose a kind of solve reservoir distribution mild or to the rig direction tilt, the unsettled structure in stratum at its top, the casing program method for designing of existing horizontal well and extended reach well can not satisfy the novel well bore Section Design method of the needs of drilling engineering and petroleum production engineering simultaneously.
The present invention realizes like this; Centre drill a bite straight well of horizontal well group, its bottom is connected with the horizontal segment end of other many mouthfuls of wells, net horizontal section is inclined upwardly, the angle buildup interval of horizontal well and extended reach well extends to the good ground below reservoir and/or reservoir, 1 mouthful of straight well+N mouth horizontal segment updip horizontal well (N=1,2,3 ...).Straight well can utilize exploratory well or the development evaluation well completed to serve as, like this with regard to make much can not horizontal well drilling and the structure of extended reach well come true; Solve the problem that horizontal segment updip well forces gas stream to flow to oblique below, like this, more be conducive to the natural flow of oil gas, thereby improved oil-gas mining speed and final coefficient of mining.
In actual applications, not only save fund, also verified accurate location and the characteristic of reservoir.Straight well has the characteristics that can reserve the sand setting pocket, like this, has just solved " horizontal segment updip horizontal well " and has crossed early leaving, shakes out and the problem such as obstruction.
In addition because the casing program characteristics of the design's method be first get into reservoir bottom, the high-order bit to reservoir creeps into again, in this course, the situation of oil reservoir has had clearly understanding, like this, need to bore the trouble of leading eye when just having saved horizontal well drilling.
Description of drawings
Concrete structure drawings and Examples of the present invention provide.
Figure-1 horizontal segment updip well group schematic diagram.
Legend:
1, well head, 2, straight well, 3, horizontal well #1,4, horizontal well #N, 5, well, 6, inclination section, 7, (updip) horizontal segment, 8, horizontal segment end end, 9, ponding and sand, 10, the sand setting pocket
The specific embodiment
The first step: according to development plan and the surface state in oil field, make relative well head 1 position of straight well 2 and other N mouth " horizontal segment updip horizontal well " 3,4.
Second step: bore the larger straight well 2 of a bite diameter in the central authorities of horizontal well group, well 5 its degree of depth are deeper than 30 meters-50 meters of reservoir bottoms, and purpose is for the accurate degree of depth of drilling oil reservoir, reserves enough sand setting pockets 10.
The 3rd step: bore N mouth " horizontal segment updip horizontal well " 3,4 in the distance that distance straight well 2 is suitable, this horizontal well has inclination section 6, and (updip) horizontal segment 7, forms ponding and sand 9 in its bottom.
The 4th step: utilize modern drilling technology, the end 8 of horizontal segment will be connected with the topmost reservoir of straight well 2.
Claims (3)
1. the boring method of horizontal segment updip well group, centre drill a bite straight well of horizontal well group, its bottom is connected with the horizontal segment end of other many mouthfuls of wells.
2. horizontal segment updip well group as claimed in claim 1, net horizontal section is inclined upwardly, and the angle buildup interval of horizontal well and extended reach well extends to the good ground below reservoir or reservoir.
3. horizontal segment updip well group as claimed in claim 1, straight well can utilize exploratory well or the development evaluation well completed to serve as.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104069996A CN103161439A (en) | 2011-12-09 | 2011-12-09 | Horizontal segment updip well group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104069996A CN103161439A (en) | 2011-12-09 | 2011-12-09 | Horizontal segment updip well group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103161439A true CN103161439A (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104069996A Pending CN103161439A (en) | 2011-12-09 | 2011-12-09 | Horizontal segment updip well group |
Country Status (1)
| Country | Link |
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| CN (1) | CN103161439A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234667A (en) * | 2014-07-18 | 2014-12-24 | 张传文 | Brine channel, and system and excavation method thereof |
| CN108894765A (en) * | 2018-08-24 | 2018-11-27 | 广州海洋地质调查局 | The major-minor well construction and its method of deep water shallow layer gas hydrate exploitation |
| CN110043229A (en) * | 2019-04-02 | 2019-07-23 | 广州海洋地质调查局 | A kind of more well group connection convergence recovery methods of Gas Hydrate In Sea Areas |
Citations (6)
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| US5029641A (en) * | 1987-12-17 | 1991-07-09 | Standard Alaska Production Company | Inverted wellbore completion |
| US5402851A (en) * | 1993-05-03 | 1995-04-04 | Baiton; Nick | Horizontal drilling method for hydrocarbon recovery |
| CN1247930A (en) * | 1998-05-27 | 2000-03-22 | 特克马克国际发展公司 | Multiple effluent method for producing petroleum from tar sand |
| US6679322B1 (en) * | 1998-11-20 | 2004-01-20 | Cdx Gas, Llc | Method and system for accessing subterranean deposits from the surface |
| CN1659359A (en) * | 2001-10-19 | 2005-08-24 | Cdx天然气有限公司 | Method and system for dewatering of coal seams |
| CN1727636A (en) * | 1998-11-20 | 2006-02-01 | Cdx天然气有限公司 | Method and system for accessing subterranean deposits from the surface |
-
2011
- 2011-12-09 CN CN2011104069996A patent/CN103161439A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5029641A (en) * | 1987-12-17 | 1991-07-09 | Standard Alaska Production Company | Inverted wellbore completion |
| US5402851A (en) * | 1993-05-03 | 1995-04-04 | Baiton; Nick | Horizontal drilling method for hydrocarbon recovery |
| CN1247930A (en) * | 1998-05-27 | 2000-03-22 | 特克马克国际发展公司 | Multiple effluent method for producing petroleum from tar sand |
| US6679322B1 (en) * | 1998-11-20 | 2004-01-20 | Cdx Gas, Llc | Method and system for accessing subterranean deposits from the surface |
| CN1727636A (en) * | 1998-11-20 | 2006-02-01 | Cdx天然气有限公司 | Method and system for accessing subterranean deposits from the surface |
| CN1659359A (en) * | 2001-10-19 | 2005-08-24 | Cdx天然气有限公司 | Method and system for dewatering of coal seams |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234667A (en) * | 2014-07-18 | 2014-12-24 | 张传文 | Brine channel, and system and excavation method thereof |
| CN108894765A (en) * | 2018-08-24 | 2018-11-27 | 广州海洋地质调查局 | The major-minor well construction and its method of deep water shallow layer gas hydrate exploitation |
| CN110043229A (en) * | 2019-04-02 | 2019-07-23 | 广州海洋地质调查局 | A kind of more well group connection convergence recovery methods of Gas Hydrate In Sea Areas |
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Addressee: Wei Guo Document name: the First Notification of an Office Action |
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Application publication date: 20130619 |