胡尖山油田安83区长7致密油藏水平井地层能量补充方式研究  

Study on Formation Energy Supplement Ways of Horizontal Wells of Chang-7 Dense Reservoir in An-83 Block of Hujianshan Oilfield

作　　者：王平平 李秋德 张博 李超 李忠阳 冯松林 李龙龙 

机构地区：[1]中国石油长庆油田分公司第六采油厂地质研究所,陕西西安710200

出　　处：《石油工业技术监督》2015年第9期1-3,共3页Technology Supervision in Petroleum Industry

基　　金：国家示范工程"鄂尔多斯盆地大型低渗透岩性地层油气藏开发"(编号:2011zx05044)

摘　　要：胡尖山油田安83区长7致密油藏水平井常规注水易见水,不注水地层能量不足,递减大等开发矛盾突出,合理开发技术政策不明确。近年来,对水平井开展了吞吐采油、周期注水、异步注采等工作,不断探索地层能量补充方式,均取得了一定效果及认识,但总体来说基于毛管吸吮作用和压差机理的按一定注入周期补充能量的渗析采油法对该区致密油开发具有深远意义。在充分结合改造强度、缝网形态等参数情况下实施效果较好。周期注水和异步注采已取得阶段性成果,后期可持续扩大实施;连片吞吐采油由于井距小、井间压力相互干扰,导致波及面积小、不利于渗吸置换,效果较差,建议后期隔井距实施。Water breakthrough easily occurs in the conventional water injection of the horizontal wells in Chang-7 tight reservoir in Hujianshan oilfield, but if the water injection is not carried out, there are the problems of insufficient formation energy and liquid pro- ducing reduction. A reasonable development technology policy is not clear. In recent years, the technological measures of huff and puff, cyclic water injection and asynchrony injection-production are implemented to the horizontal wells to search the reasonable for- mation energy supplement methods, and a certain effect and understanding have been achieved. It is shown that the dialysis oil pro- duction based on capillary action and pressure difference mechanism is of important significance to the development of the dense oil reservoir, and its implementation effect is the best when it is combined with transformation strength and fracture pattern parameters. The stage result of the cyclic water injection and the asynchrony injection-production has been achieved, and the implementation of the measures can be expanded. The effect of huff-puff oil production in large area is bad due to little well spacing and pressure inter- ference among wells leading to small swept area.

关 键 词：安83区长7 致密油 吞吐采油 周期注水 异步注采 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]