摘要
针对斜穿地层水平井与定向井或直井因垂深差异无法实现以垂深进行地层及储层对比难题,运用水平井水平段斜深折算垂深方法和反扣水平井水平段顶底倒置处理后斜深折算垂深方法,得出了斜穿地层水平井可以与定向井或直井进行地层及储层对比的结论。将研究成果应用于锦州25-1南油田A49井区,生产动态证实,储层对比方案与油藏动态认识一致,2口水平采油井和定向注水井注采对应关系均较好,该区块的累计产油量为32. 47×10~4m^3,综合含水为30. 1%,采出程度为17. 2%。对锦州25-1南油田沙二段78口水平井与60口定向井(包括潜山过路井)及10口直井(探井)开展了精细地层及储层对比,效果显著。研究内容对类似斜穿地层水平井开发油田具有一定的借鉴意义。
In view of the difficulty of formation and reservoir correlation in true vertical depth between oblique horizontal well and directional well or vertical well due to the difference of their true vertical depths, the true vertical depth conversion method for along hole depth of horizontal section of horizontal well and the true vertical depth conversion method for along hole depth after inversion treatment of top and bottom of horizontal section of left handed horizontal well were used to obtain the conclusions that oblique horizontal well can be correlated with directional well or vertical well in formation and reservoir. The study achievements were applied in wellblock A 49 of Jinzhou 25-1 south oilfield. The production performance proved that the reservoir correlation scheme was consistent with the reservoir performance understanding, and the injection-production corresponding relationship of 2 horizontal production wells and directional water injection wells was good. The cumulative oil production of this block is 32.47×10 4 m 3, the composite water cut is 30.1% and the recovery percent of reserves is 17.2%. Moreover, fine formation and reservoir correlation of 78 horizontal wells, 60 directional wells (including buried hill crossing wells) and 10 vertical wells (exploration wells) in Sha2 Member of Jinzhou 25-1 south oilfield was carried out, achieving remarkable effect. The study contents have some reference significance for the oilfield developed by similar oblique horizontal wells.
作者
吕坐彬
文佳涛
李广龙
祝晓林
房娜
Lyu Zuobin;Wen Jiatao;Li Guanglong;Zhu Xiaolin;Fang Na(CNOOC Tianjin Company, Tianjin 300459, China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2019年第2期106-111,共6页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"渤海油田加密调整及提高采收率油藏工程示范项目"(2016ZX05058-001)
关键词
气顶砂岩油藏
斜穿地层水平井
垂厚折算系数
顶底倒置处理
储层对比
渤海湾盆地
sandstone reservoir with gas cap
oblique horizontal well
vertical thickness conversion coefficient
top- bottom inversion treatment
reservoir correlation
Bohai Bay Basin
