双靶定向井在桥29 块调整挖潜中的实践经验

The Practical Experience of Double Target Directional Well Technology Applied in Adjustment and Tapping Potential of Q29 Oilfield

郭献广 呼舜兴 龚厚琼

中原石油勘探局采油六厂

The No. 6 Oil Production Company , Zhongyuan Petroleum Exploration Bureau ,Henan 274511 , P. R. China

复杂断块油田桥29 块一类层严重水淹,注水启动二、三类层难度大,已进入中高含水开发阶段。分析区块开发面临的主要矛盾是:井网密度大,平面调整余地小;含油层系单一,纵向上无法进行层系调整;储层非均质严重,砂体分布不稳定,设计经济效益井难度大。根据区块开发实际,深化地质基础研究,通过构造精细解释,储层综合评价,储量动用状况分析及剩余油分布规律研究,确定了区块的主要挖潜方向:认识程度较低的断层边角部位构造复杂带、具有多套含油层系的屋脊断块高部位及局部剩余油富集区。通过应用双靶定向井调整挖潜技术,对改善区块开发效果起到了显著作用。

The Q29 block is very complicated oilfield; it’s good productive layers are watered seriously , and the bad layers are hard to be produced. The development of oil field entered into later stage of middle or high water cut . The more serious problems we faced are: the well density is too high to be adjusted ; the productive layers are too single to adjust mini-layer longitudinally ; Q29 oilfiled is an homogeneous reservoir . It is difficult to design economic adjustment wells. Based on the productive condition , we do a lot of fundamental geologic study , including : fine reservoir description , performance analysis , reservoir valuation and remaining oil distribution law. At last , we find the potential tapping target : complicated block area , high structure position with rich remaining oil. Application of double target directional well technology in Q29 oil field, we gain a better productive result .