CN204252974U - A kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer - Google Patents
A kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer Download PDFInfo
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- CN204252974U CN204252974U CN201420600404.XU CN201420600404U CN204252974U CN 204252974 U CN204252974 U CN 204252974U CN 201420600404 U CN201420600404 U CN 201420600404U CN 204252974 U CN204252974 U CN 204252974U
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- 239000007924 injection Substances 0.000 claims abstract description 12
- 238000002347 injection Methods 0.000 claims abstract description 12
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- 238000011084 recovery Methods 0.000 abstract description 14
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- 238000005553 drilling Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 33
- 238000011161 development Methods 0.000 description 9
- 239000011148 porous material Substances 0.000 description 9
- 239000010779 crude oil Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
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Abstract
The utility model is a kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer, horizontal well well structure comprises the straight well section extending to oil-containing target zone from ground, two horizontal segments arranged in upper and lower stacked relation be connected with straight well section, two horizontal segments are positioned at oil-containing target zone, upper strata horizontal segment is gas injection section, and lower floor's horizontal segment is production section.Upper strata horizontal section length is 800m, and lower floor's horizontal section length is 1000m.The intersegmental vertical distance of upper strata horizontal segment and lower floor's horizontal segment is 300m.The inclination section with certain radian is provided with between upper strata horizontal segment and straight well section; The steady tilted section with certain radian is provided with between lower floor's horizontal segment and straight well section.Two mouthfuls of water horizontal wells are merged into flatly by the utility model, and achieve the demand that a bite well meets gas injection and oil recovery simultaneously, single well controlled reserves scale is large, save drilling well investment, existing subterranean resource can be utilized better, reduce the waste of resource, improve the recovery utilization rate of resource.
Description
Technical field
The utility model relates to the exploitation of a kind of deep layer bulk or thick-layer shape ligh-oil reservoir, particularly relates to a kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer.
Background technology
Double porosity reservoir, also known as fracture pore medium reservoir, refers to the existing hole of rock crannied reservoir again, and pore media is main crude oil reservoir space, and crack is oil flow channel.The main distinction of dual media and simple medium be exactly matrix to crack feed flow, then flow to shaft bottom by crack.Because fracture permeabgility is much larger than matrix permeability, therefore how improving matrix crude oil recovery percent of reserves is improve the key of oil recovery.
Natural energy exploitation refers to the driving-energy exploitation utilizing oil reservoir itself to have, and driving-energy is more weak, and development effectiveness is bad, and ultimate recovery is lower.
Water filling in oil reservoir is pointed in artificial recharge, to increase its displacement of reservoir oil, is Yanchang Oilfield stable production period, improves one of method of recovery ratio.
Crack is comparatively grown, vertical communication better and the larger massive Double Porosity Reservoir of core intersection, adopt traditional areal well pattern to dispose waterflooding extraction, often occur the phenomenon that water breakthrough is comparatively serious, reserves exploitation degree is low, recovery ratio is low.Especially oil-containing target zone buried depth is greater than to the thick-layer oil reservoir of 4000m, under applying conventional straight well or horizontal well well type development situation, needs well number many, more than oil-containing interval of interest, consume a large amount of drill footages, bring larger financial burden to oil reservoir development.
Thus, the present inventor relies on experience and the practice of being engaged in relevant industries for many years, proposes a kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer, to overcome the defect of prior art.
Utility model content
The purpose of this utility model is to provide a kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer, and the block ligh-oil reservoir of solution deep layer is applied conventional well type exploiting economy and born large problem.
The purpose of this utility model realizes like this, a kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer, described horizontal well well structure comprises the straight well section extending to oil-containing target zone from ground, two horizontal segments arranged in upper and lower stacked relation be connected with described straight well section, two horizontal segments are positioned at oil-containing target zone, described upper strata horizontal segment is gas injection section, and described lower floor horizontal segment is production section.
In a better embodiment of the present utility model, upper strata horizontal section length is 800m, and described lower floor horizontal section length is 1000m.
In a better embodiment of the present utility model, the intersegmental vertical distance of upper strata horizontal segment and lower floor's horizontal segment is 300m.
In a better embodiment of the present utility model, between described upper strata horizontal segment and described straight well section, be provided with the inclination section with certain radian; The steady tilted section with certain radian is provided with between described lower floor horizontal segment and described straight well section.
From the above mentioned, the utility model establishes the horizontal well well structure of single-well injection-production, in implementation process, two mouthfuls of water horizontal wells are merged into flatly, achieve the demand that a bite well meets gas injection and oil recovery simultaneously, single well controlled reserves scale is large, save drilling well investment, existing subterranean resource can have been utilized better, reduce the waste of resource, improve the recovery utilization rate of resource, there is great economic benefit and environmental benefit.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the utility model and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: be the generalized section of the utility model horizontal well well structure.
Fig. 2: be the single-well injection-production sectional drawing of the utility model horizontal well well structure.
Fig. 3: be same oil reservoir different well type development effectiveness comparison diagram.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and detailed description of the invention of the present utility model is described.
As shown in Figure 1, the utility model provides a kind of horizontal well well structure 10 for the block fractured reservoir exploitation of deep layer, this horizontal well well structure 10 comprises the straight well section 1 extending to oil-containing target zone a from ground, two horizontal segments 2 arranged in upper and lower stacked relation be connected with straight well section 1,3, two horizontal segments 2,3 are positioned at oil-containing target zone a, and upper strata horizontal segment 2 is gas injection section, and lower floor's horizontal segment 3 is production section.Upper strata horizontal segment 2 length is 800m, and lower floor's horizontal segment 3 length is 1000m; Upper strata horizontal segment 2 is 300m with the intersegmental vertical distance of lower floor's horizontal segment 3, is conducive to the swept volume expanding injected media.
This horizontal well well structure 10 is applicable to the block Double Porosity Reservoir of deep layer, and the well pattern improving recovery ratio with traditional straight well gas injection development has obvious difference.For the block ligh-oil reservoir of deep layer, as adopted traditional straight well areal well pattern, because straight well producing well section is short, control pasta amasss little, therefore needs more straight well to realize effectively employing of reserves resources.Upper strata of the present utility model horizontal segment 2 length is 800m, and lower floor's horizontal segment 3 length is 1000m, and it is many that individual well bores chance crack, and greatly, single well controlled reserves is large, and saved drilling well investment, well yield is high for drainage area, and rate of oil production is fast, can realize whole development.For deep layer massive oil pool, especially the oil-containing target zone degree of depth is at the oil reservoir of below 4000m, by the more drill footage of consumption and investment on oil-containing target zone, horizontal well well structure 10 of the present utility model is in implementation process, two mouthfuls of water horizontal wells are merged into flatly, achieve the demand that a bite well meets gas injection and oil recovery simultaneously, saved the drill footage of individual well, single well controlled reserves is 2 times of horizontal well, 6 times of straight well.
Further, between upper strata horizontal segment 2 and straight well section 1, be provided with the inclination section 21 with certain radian; The steady tilted section 31 with certain radian is provided with between lower floor's horizontal segment 3 and straight well section 1.As shown in Figure 2, this horizontal well well structure 10 starts deflecting at oil-containing target zone a, namely forms inclination section 21 and steady tilted section 31.Two horizontal segments 2,3 are opened with perforation or lower screen casing mode, upper strata horizontal segment 2 gas injection, and lower floor's horizontal segment 3 is production section, the gas medium of injection because of gravitational differentiation up, crude oil is driven to oil reservoir bottom and production section, thus realizes effective displacement.
For Double Porosity Reservoir, especially pore media is the oil reservoir of main oils reservoir space, as adopted traditional artificial recharge exploitation, because of pore media and fracture medium permeability contrast large, inject water mainly along fractuer direction flowing, pore media crude oil development degree is low.Laboratory test research also shows, in the fracture-type reservoir of pore media as main oils reservoir space, because fracture medium and pore media permeability contrast are comparatively large, waterflooding extraction pore media recovery percent of reserves is only 14.8%, and oil displacement efficiency only has 24.68%.Adopt gas injection development greatly can improve pore media crude oil recovery percent of reserves, 43.64% is improved relative to water drive, oil displacement efficiency can reach 63.43%, and therefore choosing the hydrocarbon gas at upper strata of the present utility model horizontal segment 2 is injected media, carries out the top note hydrocarbon gas displacement of reservoir oil and carrys out supplementary stratum energy.As shown in Figure 3, under the analog computation of oil reservoir actual parameter, contrast adopts single-well injection-production mode and the straight well gas injection development effect of the utility model horizontal well, and the utility model comparatively straight well exploitation finally can improve recovery percent of reserves 14.26%.
The foregoing is only the schematic detailed description of the invention of the utility model, and be not used to limit scope of the present utility model.Any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present utility model and principle and amendment, all should belong to the scope of the utility model protection.
Claims (4)
1. the horizontal well well structure for the block fractured reservoir exploitation of deep layer, it is characterized in that: described horizontal well well structure comprises the straight well section extending to oil-containing target zone from ground, two horizontal segments arranged in upper and lower stacked relation be connected with described straight well section, two horizontal segments are positioned at oil-containing target zone, described upper strata horizontal segment is gas injection section, and described lower floor horizontal segment is production section.
2., as claimed in claim 1 for the horizontal well well structure of the block fractured reservoir exploitation of deep layer, it is characterized in that: described upper strata horizontal section length is 800m, described lower floor horizontal section length is 1000m.
3., as claimed in claim 2 for the horizontal well well structure of the block fractured reservoir exploitation of deep layer, it is characterized in that: the intersegmental vertical distance of described upper strata horizontal segment and lower floor's horizontal segment is 300m.
4. the horizontal well well structure for the block fractured reservoir exploitation of deep layer as described in claim arbitrary in claims 1 to 3, is characterized in that: between described upper strata horizontal segment and described straight well section, be provided with the inclination section with certain radian; The steady tilted section with certain radian is provided with between described lower floor horizontal segment and described straight well section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420600404.XU CN204252974U (en) | 2014-10-16 | 2014-10-16 | A kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer |
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| CN201420600404.XU CN204252974U (en) | 2014-10-16 | 2014-10-16 | A kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer |
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| CN204252974U true CN204252974U (en) | 2015-04-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089573A (en) * | 2015-07-21 | 2015-11-25 | 中国石油天然气股份有限公司 | Recovering method for improving substrate and microfracture oil flooding efficiency in dual medium reservoir gas injection |
| CN105574251A (en) * | 2015-12-15 | 2016-05-11 | 中国石油大学(北京) | Geomechanics based design method for deflecting azimuth of fracture type stratal directional well |
| CN108316910A (en) * | 2017-09-20 | 2018-07-24 | 中国石油大学(北京) | The well pattern structure and development approach of deep layer bulk fractured reservoir are developed for gas drive |
| CN109958410A (en) * | 2019-03-06 | 2019-07-02 | 大连理工大学 | A kind of device and method closing object using individual well joint underground heat production of water |
| CN108316910B (en) * | 2017-09-20 | 2024-04-26 | 中国石油大学(北京) | Well pattern structure for gas-driven development of deep block-shaped fractured reservoir and development method |
-
2014
- 2014-10-16 CN CN201420600404.XU patent/CN204252974U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089573A (en) * | 2015-07-21 | 2015-11-25 | 中国石油天然气股份有限公司 | Recovering method for improving substrate and microfracture oil flooding efficiency in dual medium reservoir gas injection |
| CN105574251A (en) * | 2015-12-15 | 2016-05-11 | 中国石油大学(北京) | Geomechanics based design method for deflecting azimuth of fracture type stratal directional well |
| CN105574251B (en) * | 2015-12-15 | 2018-07-27 | 中国石油大学(北京) | The design method in the slit formation stratum directional well deflecting orientation based on geomechanics |
| CN108316910A (en) * | 2017-09-20 | 2018-07-24 | 中国石油大学(北京) | The well pattern structure and development approach of deep layer bulk fractured reservoir are developed for gas drive |
| CN108316910B (en) * | 2017-09-20 | 2024-04-26 | 中国石油大学(北京) | Well pattern structure for gas-driven development of deep block-shaped fractured reservoir and development method |
| CN109958410A (en) * | 2019-03-06 | 2019-07-02 | 大连理工大学 | A kind of device and method closing object using individual well joint underground heat production of water |
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Granted publication date: 20150408 |
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| CF01 | Termination of patent right due to non-payment of annual fee |