摘要
水力水平钻井射孔深度一般可达到8～20m,井眼尺寸达70mm以上。采用水力水平钻井技术可实现井筒与地层闻的有效连通,形成极小转向半径的微型水平井,有效穿透近井带污染层;一次下井可在不同深度或同一深度的不同方位完成多次钻孔作业,形成多个水平井眼。运用水力水平井技术的目的是提高油气藏的采收率以及为油田增产增注服务,但是由于其成本较高,并不是所有的油田都适用。通过油藏工程的方法,以产能为主线,利用水力水平井与直井的产能比具体分析了径向水平井产能影响因素分析及其适应的地质条件。
The hole length made by super-radius horizontal drilling can come up to 8-20m, and the hole diameter of it is more than 70mm. Employing this drilling technique, many operations can be accomplished, including penetrating through polluted reservoirs near wellbores, forming minimum diverting-radius short horizontal wells, connecting wellbores with the reservoirs more effectively, making one or more horizontal well holes in the same depth or different depth during one trip. The purpose of applying the technical is to enhance recovery efficiency of reservoirs. However, not all the reservoirs are suit for it due to its high expenditures. In this article, the productivity ratio of horizontal and vertical wells is calculated, at the same time, the effected factors on productivity and geological conditions fit for waterpower horizontal well are analyzed.
出处
《石油钻探技术》
CAS
2004年第1期48-50,共3页
Petroleum Drilling Techniques
