CN201687455U - Three-dimensional staggered well pattern structure of a horizontal well - Google Patents
Three-dimensional staggered well pattern structure of a horizontal well Download PDFInfo
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- CN201687455U CN201687455U CN2010201691095U CN201020169109U CN201687455U CN 201687455 U CN201687455 U CN 201687455U CN 2010201691095 U CN2010201691095 U CN 2010201691095U CN 201020169109 U CN201020169109 U CN 201020169109U CN 201687455 U CN201687455 U CN 201687455U
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Abstract
The utility model provides a three-dimensional staggered well pattern structure of a horizontal well, comprising a horizontal well with multi-port layered distribution; the multi-port horizontal well is arranged in a blocky or thick-layer oil reservoir; each layer of horizontal surface is internally provided with a plurality of rows of horizontal wells; and the planes of all the wells in adjacent rows are staggered in parallel, and all the wells in the adjacent layers are staggered longitudinally. The technical scheme solves the problems that in the prior art, the well pattern mining for the vertical well area and longitudinal difference cause low employing degree of the oil layers, the needed wells are more, the mining of the oil layers of single-layer horizontal well causes low employing degree of oil-gas reserve volume, and the water injection to the well patterns of the vertical well or the single-layer horizontal well has low water-drive conformance factor; and the technical scheme also improves the oil-producing speed and recovery ratio of the oil reservoir and simultaneously reduces the development cost.
Description
Technical field
The utility model belongs to the oil reservoir development field, relates to bulk or thick-layer shape reservoir development, is specifically related to a kind of horizontal well three-dimensional intersection well pattern structure.
Background technology
For a long time, the research of well pattern structure rationally is the problem that people pay attention to always in the oil-gas field development.The forties in 20th century, Muskat has carried out deep research to the seepage flow mechanism of simple well pattern; Simultaneously, people are under 1 the condition in oil reservoir homogeneous and mobility ratio, have proposed the water breakthrough theory between reservoir coverage and the well pattern form constantly.At the end of the sixties, The former Russian scholar Xie Erkaqiaofu has proposed the empirical formula of oil field ultimate recovery and well spacing density; Meanwhile, Daqing oil field has proposed the viewpoint of " pressing oil sand body size well spacing ", adds up the relation of water drive control degree and well pattern by oil sand body figure.At the beginning of the eighties, virgin charter has proposed to obtain the well pattern form of maximum production.At the beginning of the nineties, Qi Yufeng has proposed the well pattern Systems Theory.The nineties in 20th century, people such as Lang Zhaoxin have carried out theoretical research to horizontal well and straight well unitized production well pattern.People such as Cheng Linsong have also set up FEM (finite element) model, and that uses has carried out numerical simulation study to horizontal well five-spot areal well pattern.By above well pattern research and development course as can be seen, along with the continuous development of practice, people are also deepening continuously to the understanding of well pattern.
In oil gas field was produced, the selection of well pattern, deployment and adjustment were the important contents of development plan, also were simultaneously one of oil gas field enterprise key factors of increasing economic efficiency.In producing at the scene, the well pattern form is controlled by the geology characteristic of oil gas field mainly.From the development of well net optimization design as can be seen, present these straight well areal well patterns and individual layer horizontal well areal well pattern are more suitable for the thin layer oil reservoir, belong to two-dimentional well pattern structure design.Yet the design of this well pattern for or during the multiple-zone production of thick-layer shape oil reservoir, have following defective: the exploitation of straight well areal well pattern, longitudinal difference causes producing degree of reservoir low, and required well number is many; Individual layer horizontal wells oil reservoir, the oil and gas reserves development degree is low; Straight well or the pattern flooding of individual layer horizontal well, the water drive sweep efficiency is low.
In a word, well net optimization design at present only is confined to the research in planar space, well pattern longitudinally arrangement optimization still beyond example can seek, design of two dimension well pattern and individual layer complex structural well have been difficult to solve the practical problem of thick-layer oil reservoir exploitation, how to use the space spread rational and effective exploitation oil reservoir of three-dimensional well pattern structure anxious to be solved.
The utility model content
In order to solve top problems of the prior art, the utility model proposes a kind of horizontal well three-dimensional intersection well pattern structure.
According to the technical solution of the utility model, this horizontal well three-dimensional intersection well pattern structure comprises the horizontal well of many mouthfuls of layered arrangement, it is characterized in that, many saliva horizontal well is set in bulk or the thick-layer shape oil reservoir, many drainings horizontal well is arranged in every layer of horizontal plane, and each the well plane parallel interlaced arrangement among the adjacent row, the vertical interlaced arrangement of each well in the adjacent layer, heave in the horizontal well plane, vertical stacked staggered three-dimensional well pattern structure thereby constitute.
Further, each layer horizontal well be not in the vertical in same plane.
Preferably,, rather than be completed into stacked shape, form the linear ridges that becomes end water and advance into banded step holder with the section horizontal well certain distance that staggers.
More preferably, bottom horizontal well adult fish thorn-like is arranged.
Use technical scheme described in the utility model, solved straight well areal well pattern exploitation in the prior art, longitudinal difference causes producing degree of reservoir low, and required well number is many; Individual layer horizontal wells oil reservoir, the oil and gas reserves development degree is low; Straight well or the pattern flooding of individual layer horizontal well, the problem that the water drive sweep efficiency is low.
Description of drawings
Fig. 1 is the horizontal well three-dimensional intersection well pattern schematic diagram;
Fig. 2 is a horizontal well three-dimensional intersection well pattern schematic diagram in the plane;
Fig. 3 is a horizontal well three-dimensional intersection well pattern longitudinal profile schematic diagram;
Fig. 4 is that oil well output is with the core intersection variation diagram.
The specific embodiment
Below in conjunction with accompanying drawing, to being elaborated according to horizontal well three-dimensional intersection well pattern structure described in the utility model.
This patent by the preferred planar well pattern, is vertically disposed staggered well pattern on the basis of well pattern research at present, innovation proposes horizontal well three-dimensional intersection well pattern, referring to Fig. 1.
Among Fig. 1, cuboid is represented oil reservoir, and the dotted line parallelogram is represented segmentation face, and H101, H102 etc. represents pound sign, heavy line is represented horizontal wellbore, and branch line is represented fish-bone well branch, the horizontal producing well of 1-, the horizontal gas injection well of 2-, 3-fish-bone water injection well, 4-oil reservoir, 5-segmentation face.
Horizontal well three-dimensional intersection well pattern is to adopt the staggered well pattern of a cover on the plane, vertically goes up multiple zone well and also becomes staggered, and each well is the staggered well pattern of same formation one cover on longitudinal profile, is the staggered well pattern of a cover 3 D stereo.Staggered well spacing on this well pattern is vertical, the target spot of going into that has guaranteed each layer horizontal well becomes to be interspersed in the vertical, each layer horizontal well vertically on not in same plane, with the section horizontal well certain distance that staggers, rather than be completed into stacked shape, the linear ridges that can become end water is advanced into band shape to hold in the palm into, thereby prolong the time of end water water logging to oil well, enlarge swept volume, improve oil recovery factor, concrete horizontal well three-dimensional intersection well pattern such as Fig. 2～Fig. 3.
Among Fig. 2, heavy line is represented the horizontal well pit shaft; On behalf of horizontal well, A go into target spot; Heavy line top H207, H209 etc. represent pound sign.
Among Fig. 3, circle is represented the projection of horizontal well pit shaft on longitudinal profile; Dotted line is represented the oil reservoir segmented line; 1-1,1-2 etc. represent pound sign; Each well is not all in same horizontal plane or same section around every Kou Jing and its; The θ angle is the staggered angle between the vertical offset well.
Three-dimensional, quantitative, physical analogy that can repeat to realize, the double-porosity system physical models of reservoir has determined that horizontal well three-dimensional intersection well pattern is better than the three-dimensional well pattern of simple stack.
Use the technical solution of the utility model, can improve oil well output and oil reservoir produced rate effectively.The oil well output that application level well pattern output formula calculates different core intersections as shown in Figure 7, increase along with reservoir oil layer thickness, the very fast increase of horizontal well well pattern output initial stage of individual layer, but after core intersection is increased to a certain degree, the amplitude that output increases is just very little, illustrate to surpass after the certain distance that the crude oil of outside no longer can (according to actual oil deposit parameter: reservoir pressure 41.24 MPas, horizontal segment heel end stream be pressed 39.24 MPas, 600/300 meter of well spacing/array pitch, horizontal direction permeability 4.1 * 10 by the horizontal well extraction of this one deck
-30.386 milli handkerchief second of millidarcy, viscosity of crude, 450 meters of horizontal section lengths, 800 meters of core intersections, ground crude oil relative density 0.812 gram/cubic centimetre, oil volume factor 1.51, the drainage radius that calculates is 150 meters).
Therefore, at thick-layer oil reservoir or the massive oil pool of core intersection greater than 300 meters, individual layer horizontal well well pattern can not be employed fully.Development degree is relevant with core intersection, and for last routine oil reservoir, the individual layer horizontal well is merely able to exploit to be employed apart from 150 meters of horizontal wells with interior crude oil, and when the oil reservoir of oil reservoir had 800 meters, the reserves development degree had only 37.5%.Because crude oil is not exploited greatly, so the rate of oil production of whole oil reservoir and recovery ratio are all very low.
According to the parameter of concrete oil reservoir, the distance between the horizontal-well network that core intersection that application obtains and Relationship with Yield can be determined to superpose in the vertical.Numerical reservoir simulation method also can be used for determining of distance between the horizontal-well network.The horizontal wellbore appropriate distance need be considered geological conditionss such as actual reservoir rocks and physical properties of fluids, and how the existing method of calculating rational spacing between wells is because based on straight well and plane well pattern, and not all suitable.From raising rate of oil production, recovery ratio, country is to rate of oil production and requirement stable production period, reasonable economically under the satisfied existing development technique condition, and proposition production capacity-economic law is determined the appropriate distance between the horizontal-well network.
At first determine or the horizontal well production formula is determined horizontal productivity according to development datas such as formation testing, pilot productions.
Secondly, calculate the rate of oil production that the oil field, back that brings in a well can reach.According to oil well initial stage daily oil production, calculate the well yearly rate-oil production that makes new advances by this piece production decline rule again, add old well yearly rate-oil production, obtain this piece yearly rate-oil production, thereby obtain rate of oil production.
Rate of oil production=this piece yearly rate-oil production/this piece oil in place * 100%
Calculate after-tax profit:
Annual profit=annual sales revenue-year cost of production expense-sales tax and additional-Xin well gross investment
E＝V-C-T-I
In the formula, E---oil field after-tax profit, ten thousand yuan; V---income from sales, ten thousand yuan;
C---operating cost and expense, ten thousand yuan; T---sales tax and additional, ten thousand yuan;
I---gross investment, ten thousand yuan.
Income from sales=this piece yearly rate-oil production * commodity rate * selling price
Operating cost and expense and sales tax and additional estimation, the pertinent regulations in " economic assessment of construction projects method and parameter " newly issued by middle oily joint-stock company are calculated.
Therefore, former formula is deformed into:
E＝dNp×(p×R
oc-C
t-T
rs)-A
of
xI
sw
In the formula:
DNp---the accumulation produce oil (only developing oil fields in comprehensive artificial recharge to utilize the Xie Shi empirical formula to calculate) that will increase after the new well input exploitation, ten thousand tons;
P---crude oil price, unit/ton; R
Oc---crude oil commodity rate, decimal;
C
t---cost per unit and expense in development period, unit/ton; T
Rs---sales tax and additional, unit/ton;
A
o---the oil reservoir oil area, square kilometre; f
x---well spacing density, mouthful/square kilometre;
I
Sw---individual well investment, ten thousand yuan.
Rate of oil production and after-tax profit when calculating different well spacing also made curve, and rate of oil production meets the demands and all belongs to rational spacing between wells corresponding near the well spacing interval the yield curve crest, and the well spacing of zero profit correspondence is a critical spacing.
Industrial applicibility
Producing well is mainly exploited oil reservoir below-2100 meters in Bian Tainan buried hill oil pool flooding pattern imperfection, the oil reservoir, adopts straight well area well pattern, and well pattern is perfect substantially, but exploitation effect is relatively poor.Oil reservoir fails to employ more than-1830 meters, 6 mouthfuls of straight well productions are only arranged, producing degree of reservoir is poor, rate of oil production is far below " CNPC's oil field development outline " and " China National Petroleum company oil-gas field development industry standard ", and this plane square areal well pattern is difficult to effectively employ the buried hill oil pool more than-1830 meters.
Use the technical solution of the utility model to test, utilize the horizontal well layering to dispose, improve the reserves development degree at the oil reservoir more than-1830 meters; Adopt the three-dimensional well pattern exploitation of horizontal well at this buried hill oil pool,, carry out the test of horizontal well well group by optimum well pattern design; The test well group is disposed 2 mouthfuls of water horizontal wells (limit platform H16, limit platform H18)-1800 meters positions with-2120 meters.These two mouthfuls of wells are interspersed in the vertical, and alternate angle is 30 degree, and horizontal section length is 700 meters, and vertically well spacing is 370 meters, and horizontal well plane well spacing is 300 meters.Horizontal well has been obtained higher output after going into operation.Limit platform H16 well initial production is 18 tons/day, and peripheral with only 4 tons/day of degree of depth straight well initial productions, horizontal well production improves 3.5 times.
As above-mentioned, the clear technical scheme that the utility model proposes that described in detail.Although the utility model is described and explained to preferred embodiment of the present utility model in detail, but this area those skilled in the art be appreciated that, under the situation of the spirit and scope of the present utility model that do not deviate from the claims definition, can in form and details, make multiple modification.
Claims (4)
1. horizontal well three-dimensional intersection well pattern structure, it comprises the horizontal well of many mouthfuls of layered arrangement, it is characterized in that, many saliva horizontal well is set in bulk or the thick-layer shape oil reservoir, many drainings horizontal well is arranged in every layer of horizontal plane, and each the well plane parallel interlaced arrangement among the adjacent row, the vertical interlaced arrangement of each well in the adjacent layer, heave in the horizontal well plane, vertical stacked staggered three-dimensional well pattern structure thereby constitute.
2. according to horizontal well three-dimensional intersection well pattern structure described in the claim 1, it is characterized in that each layer horizontal well be not in the vertical in same plane.
3. according to horizontal well three-dimensional intersection well pattern structure described in the claim 2, it is characterized in that,, rather than be completed into stacked shape, form the linear ridges that becomes end water and advance into banded step holder with the certain distance that staggers on the section horizontal well horizontal direction.
4. according to horizontal well three-dimensional intersection well pattern structure described in the claim 3, it is characterized in that bottom horizontal well adult fish thorn-like is arranged.
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| CN2010201691095U CN201687455U (en) | 2010-04-26 | 2010-04-26 | Three-dimensional staggered well pattern structure of a horizontal well |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806207A (en) * | 2010-04-26 | 2010-08-18 | 徐萍 | Horizontal well three-dimensional intersection well pattern structure |
| CN102628353A (en) * | 2012-03-21 | 2012-08-08 | 中国海洋石油总公司 | Well pattern adjustment and well pattern encryption method applied to on-sea hypotonic oil deposit exploitation |
| CN103899285A (en) * | 2012-12-29 | 2014-07-02 | 中国石油化工股份有限公司 | Similar limit water cut period take-turn water drive method for multi-layer sandstone reservoir |
| CN106593399A (en) * | 2016-12-26 | 2017-04-26 | 中国石油天然气股份有限公司 | Production well pattern for developing ultra-thin oil reservoir |
-
2010
- 2010-04-26 CN CN2010201691095U patent/CN201687455U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806207A (en) * | 2010-04-26 | 2010-08-18 | 徐萍 | Horizontal well three-dimensional intersection well pattern structure |
| CN102628353A (en) * | 2012-03-21 | 2012-08-08 | 中国海洋石油总公司 | Well pattern adjustment and well pattern encryption method applied to on-sea hypotonic oil deposit exploitation |
| CN102628353B (en) * | 2012-03-21 | 2015-08-05 | 中国海洋石油总公司 | A kind of Well pattern edjustment and well pattern thickening method being applied to the exploitation of marine LOW PERMEABILITY RESERVOIR |
| CN103899285A (en) * | 2012-12-29 | 2014-07-02 | 中国石油化工股份有限公司 | Similar limit water cut period take-turn water drive method for multi-layer sandstone reservoir |
| CN103899285B (en) * | 2012-12-29 | 2016-08-03 | 中国石油化工股份有限公司 | Multilamellar sandstone oil reservoir near limit Water-cut Period is rotated water drive method |
| CN106593399A (en) * | 2016-12-26 | 2017-04-26 | 中国石油天然气股份有限公司 | Production well pattern for developing ultra-thin oil reservoir |
| CN106593399B (en) * | 2016-12-26 | 2019-06-11 | 中国石油天然气股份有限公司 | Production well pattern for developing ultra-thin oil reservoir |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA PETROLEUM +. NATURAL GAS CO., LTD. Free format text: FORMER OWNER: XU PING Effective date: 20120516 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 124010 PANJIN, LIAONING PROVINCE TO: 100007 DONGCHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120516 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: PetroChina Company Limited Address before: 124010 Oilfield Development Institute, exploration and Development Institute, No. 95 petroleum street, Xinglongtai District, Liaoning, Panjin Patentee before: Xu Ping |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101229 |