CN102628353A - Well pattern adjustment and well pattern encryption method applied to on-sea hypotonic oil deposit exploitation - Google Patents
Well pattern adjustment and well pattern encryption method applied to on-sea hypotonic oil deposit exploitation Download PDFInfo
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Abstract
The invention relates to a well pattern adjustment and well pattern encryption method applied to on-sea hypotonic oil deposit exploitation. A horizontal well A, a horizontal well B and a horizontal well C which are in mutually parallel are selected, staged fracturing is carried out on the three horizontal wells respectively to generate artificial fissures vertical to a well cylinder, three artificial fissures of the horizontal well B in the middle and four artificial fissures of the horizontal well A and four artificial fissures of the horizontal well C on the two sides are distributed at stagger, fissures are mutually parallel to each other, and the distance is 80-200m. Water injection is carried out on certain fissures through injection and exploitation in a same well, oil extraction is carried out in other fissures, and encryption effects of inverted five spot well patterns, threadiness well patterns and injection and exploitation systems of the inverted five spot well patterns and the threadiness well patterns can be formed.
Description
Technical field
The present invention relates to a kind of horizontal well and man-made fracture thereof of utilizing sets up injection and extraction system, adopts through same-well injection and realize that well pattern is adjusted and the water injection oil extraction method of well pattern thickening.
Background technology
Offshore oil and gas field is in marine environment, and production facility need concentrate on offshore production platform or the wellhead platform with well with producing.Because platform construction is invested condition restriction such as huge with having bored, offshore oil and gas field can only adopt a limited number of wells to implement exploitation, and well pattern adjustment and well pattern thickening be difficulty very, and the recovery percent of reserves in oil field, rate of oil production and economy receive certain limitation.
Therefore, a kind of well pattern adjustment and well pattern thickening method that is applied to marine LOW PERMEABILITY RESERVOIR exploitation of invention seems very urgent.
Summary of the invention
The object of the present invention is to provide a kind of well pattern adjustment and well pattern thickening method that is applied to the exploitation of marine LOW PERMEABILITY RESERVOIR, utilize 3 mouthfuls of water horizontal wells and man-made fracture thereof to set up injection and extraction system, adopt through same-well injection and realize that well pattern adjustment and well pattern thickening, increase underground oil and gas control the water injection oil extraction method of degree.
Well pattern adjustment and the well pattern thickening method that is applied to marine LOW PERMEABILITY RESERVOIR exploitation of the present invention,
(1) selects 3 mouthfuls of the horizontal well A that are parallel to each other, horizontal well B2 and horizontal well C;
(2) 3 mouthfuls of water horizontal wells are implemented staged fracturing respectively and produce 11 man-made fractures vertical with pit shaft; 4 man-made fractures of 3 man-made fractures of horizontal well B in the middle of being positioned at and both sides horizontal well A and 4 man-made fractures of horizontal well C are interspersed, and the crack is parallel to each other and spacing is a 80-200 rice.
(3) with horizontal well A and horizontal well C as producing well; Utilize same-well injection to adopt horizontal well B with 1 crack Ba metaideophone water; Crack Bb and crack Bc recover the oil, and this moment, crack Aa, crack Ab, crack Ca, the crack Cb of water filling crack Ba and horizontal well A and horizontal well B were the inverted five spot well pattern.
(4) with horizontal well A and horizontal well C as producing well, with 3 crack Ba, the equal metaideophone water of Bb crack, crack Bc of horizontal well B, be equivalent to linear well pattern between horizontal well A, horizontal well B, the horizontal well C this moment.
(5) utilize same-well injection to adopt horizontal well A, keep other crack Ab, crack Ac, crack Ad to recover the oil 1 crack Ad metaideophone water; Utilize same-well injection to adopt horizontal well C simultaneously, keep other crack Cb, crack Cc, crack Cd to recover the oil 1 crack Cd metaideophone water; Utilize same-well injection to adopt 1 crack Ba metaideophone water horizontal well B, keep other crack Bb, crack Bc to recover the oil, this moment, the injection and extraction system of anti-5 well patterns was able to encrypt.
(6) utilize same-well injection to adopt horizontal well A, keep other crack Aa, crack Ab, crack Ad to recover the oil 1 crack Ac metaideophone water; Utilize same-well injection to adopt horizontal well C simultaneously, keep other crack Ca, crack Cb, crack Cd to recover the oil 1 crack Cc metaideophone water; Utilize same-well injection to adopt 1 crack Ba metaideophone horizontal well B, keep other crack Bb, crack Bc to recover the oil, this moment, the injection and extraction system of anti-5 well patterns was able to further encryption.
Through same-well injection adopt with some cracks implement water filling, recovering the oil in all the other cracks, can form the cipher round results of inverted five spot well pattern, wire well pattern and injection and extraction system thereof.
Description of drawings
Fig. 1 horizontal well man-made fracture distributed architecture sketch map.
Fig. 2 inverted five spot well pattern structure sketch map.
The linear well pattern structure sketch map of Fig. 3.
The injection and extraction system structural representation of anti-5 well patterns that Fig. 4 is able to encrypt.
Fig. 5 is able to the further injection and extraction system of anti-5 well patterns of encryption.
The specific embodiment
Select 3 mouthfuls of the horizontal well A1 that are parallel to each other, horizontal well B2 and horizontal well C3;
3 mouthfuls of water horizontal wells are implemented staged fracturing respectively produce 11 man-made fractures vertical with pit shaft, 4 man-made fractures and 4 man-made fractures of horizontal well C3 of 3 man-made fractures and both sides horizontal well A1 that are positioned at the horizontal well B2 of centre are interspersed, and are as shown in Figure 1.The crack is parallel to each other and spacing is a 80-200 rice.
Embodiment 1
With horizontal well A1 and horizontal well C3 as producing well; Utilize same-well injection to adopt 21 metaideophone water horizontal well B2 with 1 crack Ba; Crack Bb22 and crack Bc23 recover the oil, and water filling this moment crack Ba 21 and crack Aa11, crack Ab12, crack Ca31, the crack Cb32 of horizontal well A1 and horizontal well B2 are the inverted five spot well pattern.As shown in Figure 2.
As producing well, with 3 crack Ba21, the equal metaideophone water of Bb22 crack, crack Bc23 of horizontal well B2, be equivalent to linear well pattern between horizontal well A1, horizontal well B2, the horizontal well C3 this moment with horizontal well A1 and horizontal well C3.As shown in Figure 3.
Utilize same-well injection to adopt horizontal well A1, keep other cracks Ab12, crack Ac13, crack Ad14 to recover the oil 1 crack Ad14 metaideophone water; Utilize same-well injection to adopt horizontal well C3 simultaneously, keep other crack Cb32, crack Cc33, crack Cd34 to recover the oil 1 crack Cd34 metaideophone water; Utilize same-well injection to adopt 1 crack Ba21 metaideophone water horizontal well B2, keep other crack Bb22, crack Bc23 to recover the oil, this moment, the injection and extraction system of anti-5 well patterns was able to encrypt.As shown in Figure 4.
Embodiment 4
Utilize same-well injection to adopt horizontal well A1, keep other crack Aa11, crack Ab12, crack Ad14 to recover the oil 1 crack Ac13 metaideophone water; Utilize same-well injection to adopt horizontal well C3 simultaneously, keep other crack Ca31, crack Cb32, crack Cd34 to recover the oil 1 crack Cc33 metaideophone water; Utilize same-well injection to adopt 1 crack Ba21 metaideophone water horizontal well B2, keep other crack Bb22, crack Bc23 to recover the oil, this moment, the injection and extraction system of anti-5 well patterns was able to further encryption.As shown in Figure 5.
Claims (4)
1. a well pattern that is applied to marine LOW PERMEABILITY RESERVOIR exploitation is adjusted and the well pattern thickening method, it is characterized in that:
(1) selects 3 mouthfuls of the horizontal well A that are parallel to each other, horizontal well B and horizontal well C;
(2) 3 mouthfuls of water horizontal wells are implemented staged fracturing respectively and produce the man-made fracture vertical with pit shaft; 4 man-made fractures of 3 man-made fractures of horizontal well B in the middle of being positioned at and both sides horizontal well A and 4 man-made fractures of horizontal well C are interspersed, and the crack is parallel to each other and spacing is a 80-200 rice;
(3) with horizontal well A and horizontal well C as producing well; Utilize same-well injection to adopt horizontal well B with 1 crack Ba metaideophone water; Crack Bb and crack Bc recover the oil, and this moment, crack Aa, crack Ab, crack Ca, the crack Cb of water filling crack Ba and horizontal well A and horizontal well B were the inverted five spot well pattern.
2. a well pattern that is applied to marine LOW PERMEABILITY RESERVOIR exploitation is adjusted and the well pattern thickening method, it is characterized in that:
(1) selects 3 mouthfuls of the horizontal well A that are parallel to each other, horizontal well B and horizontal well C;
(2) 3 mouthfuls of water horizontal wells are implemented staged fracturing respectively and produce the man-made fracture vertical with pit shaft; 4 man-made fractures of 3 man-made fractures of horizontal well B in the middle of being positioned at and both sides horizontal well A and 4 man-made fractures of horizontal well C are interspersed, and the crack is parallel to each other and spacing is a 80-200 rice;
(3) with horizontal well A and horizontal well C as producing well, with 3 crack Ba, the equal metaideophone water of Bb crack, crack Bc of horizontal well B, be equivalent to linear well pattern between horizontal well A, horizontal well B, the horizontal well C this moment.
3. a well pattern that is applied to marine LOW PERMEABILITY RESERVOIR exploitation is adjusted and the well pattern thickening method, it is characterized in that:
(1) selects 3 mouthfuls of the horizontal well A that are parallel to each other, horizontal well B and horizontal well C;
(2) 3 mouthfuls of water horizontal wells are implemented staged fracturing respectively and produce the man-made fracture vertical with pit shaft; 4 man-made fractures of 3 man-made fractures of horizontal well B in the middle of being positioned at and both sides horizontal well A and 4 man-made fractures of horizontal well C are interspersed, and the crack is parallel to each other and spacing is a 80-200 rice;
(3) utilize same-well injection to adopt horizontal well A, keep other crack Ab, crack Ac, crack Ad to recover the oil 1 crack Ad metaideophone water; Utilize same-well injection to adopt horizontal well C simultaneously, keep other crack Cb, crack Cc, crack Cd to recover the oil 1 crack Cd metaideophone water; Utilize same-well injection to adopt 1 crack Ba metaideophone water horizontal well B, keep other crack Bb, crack Bc to recover the oil, this moment, the injection and extraction system of anti-5 well patterns was able to encrypt.
4. a well pattern that is applied to marine LOW PERMEABILITY RESERVOIR exploitation is adjusted and the well pattern thickening method, it is characterized in that:
(1) selects 3 mouthfuls of the horizontal well A that are parallel to each other, horizontal well B and horizontal well C;
(2) 3 mouthfuls of water horizontal wells are implemented staged fracturing respectively and produce the man-made fracture vertical with pit shaft; 4 man-made fractures of 3 man-made fractures of horizontal well B in the middle of being positioned at and both sides horizontal well A and 4 man-made fractures of horizontal well C are interspersed, and the crack is parallel to each other and spacing is a 80-200 rice;
(3) utilize same-well injection to adopt horizontal well A, keep other crack Aa, crack Ab, crack Ad to recover the oil 1 crack Ac metaideophone water; Utilize same-well injection to adopt horizontal well C simultaneously, keep other crack Ca, crack Cb, crack Cd to recover the oil 1 crack Cc metaideophone water; Utilize same-well injection to adopt 1 crack Ba metaideophone horizontal well B, keep other crack Bb, crack Bc to recover the oil, this moment, the injection and extraction system of anti-5 well patterns was able to further encryption.
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| 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 |
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| CN104790931A (en) * | 2015-03-10 | 2015-07-22 | 中国海洋石油总公司 | On-sea low-permeability reservoir thin interbed injection-recovery branched well control-increased method |
| CN104818977A (en) * | 2015-03-10 | 2015-08-05 | 中国海洋石油总公司 | Single-well parallel crack water injection and oil extraction method of offshore low-permeability reservoir |
| CN104818978A (en) * | 2015-03-10 | 2015-08-05 | 中国海洋石油总公司 | One-well multi-control method for offshore low-permeability reservoir thick oil layer exploitation |
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| CN111594130A (en) * | 2020-05-11 | 2020-08-28 | 中国石油天然气股份有限公司 | Method for integrated periodical production of encryption adjustment of pressure, injection and extraction |
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| CN104695924A (en) * | 2013-12-05 | 2015-06-10 | 中国石油天然气股份有限公司 | Method for improving complexity of fracture and construction efficiency of horizontal well |
| CN104790931A (en) * | 2015-03-10 | 2015-07-22 | 中国海洋石油总公司 | On-sea low-permeability reservoir thin interbed injection-recovery branched well control-increased method |
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| CN106761612B (en) * | 2017-02-14 | 2019-03-15 | 中国石油大学(北京) | The asynchronous water injection oil extraction method of double different wells of pressure break horizontal well of zip mode cloth seam |
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| CN111350485A (en) * | 2018-12-20 | 2020-06-30 | 中国石油天然气股份有限公司 | Well pattern adjusting method and device |
| CN111350485B (en) * | 2018-12-20 | 2022-05-10 | 中国石油天然气股份有限公司 | Well pattern adjusting method and device |
| CN111594130A (en) * | 2020-05-11 | 2020-08-28 | 中国石油天然气股份有限公司 | Method for integrated periodical production of encryption adjustment of pressure, injection and extraction |
| CN111594130B (en) * | 2020-05-11 | 2022-06-03 | 中国石油天然气股份有限公司 | Method for integrated periodical production of encryption adjustment of pressure, injection and extraction |
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