鱼骨水平井应用实例

Application of Fishbone Horizontal Well

百重7井区所处区域构造位置属准噶尔盆地西北缘克—乌逆掩断裂带百口泉段上盘,油藏上倾方向及下倾方向被断层切割。由于长期处于区域构造高部位,并且储集体与油源断裂相连通,是油气运移的主要指向区。同时由于高部位剥蚀严重,使原油被氧化,形成稠油油藏。YG-BHW01井是利用鱼骨水平井[1]技术开发百重7井区克上组油层,开发目的是:增加泄油面积,改善注汽生产效果,提高油藏动用程度。本文通过对该井的介绍,分析鱼骨水平井施工的主要难点及技术特点。

The regional tectonic position of Baichong 7 well block belongs to hanging wall of Baikouquan section of Ukrainian overthrust fault in northwestern margin of Junggar basin, and the up-dip direction and down-dip direction of the reservoir were cut by faults. Because Baichong 7 well block was high location of regional structure over a long period of time, and the oil reservoir connected source faults, it was main hydrocarbon migration zone. At the same time, due to severe erosion of the high parts, crude oil was oxidized to form heavy oil reservoir. YG-BHW01 Well used fishbone horizontal drilling technology to develop top group oil layer of Gaichong 7 well block. The development objectives were to increase drainage area, to improve the effectiveness of steam injection production, and to increase the producing degree of the reservoir. In this paper, the wells were described; main difficulties in fishbone horizontal well construction were analyzed as well as technical features.