小位移深造斜点定向井施工技术

DRILLING TECHNOLOGY FOR DIRECTIONAL WELLS OF SMALL DISPLACEMENT AND DEEP KOP

董云安 陈小元 汪先迎 许尔丹 袁建平 蒋燕

江苏石油勘探局钻井处, 江苏江都 225261

Drilling Dept. of Jiangsu Petroleum Exploration Bureau

小位移深造斜点定向井技术,有利于减少定向井扭方位及更换钻具组合的次数,能有效降低定向井的成本。主要介绍了小位移深造斜点定向井的剖面设计、定向初始方位角的确定、井眼轨迹控制及安全施工技术等。从2001年起,该技术在江苏油田30口定向井中进行应用,取得较好效果,扭方位次数明显减少,全井未扭方位率达95%,为调整轨迹而更换钻具组合的次数也明显降低,钻井周期也得到一定程度的缩短。

The directional drilling technology described here can minimize the frequency of adjusting orientation and changing BHA,thus can cut down the costs of drilling directional wells effectively.This paper focuses on its configuration design,determination of the initial orientation,well trajectory control and safety drilling technologies,etc.This technology has been used in 30 directional wells in Jiangsu Oilfield,with good results achieved,e.g.,95% of the wells were free of orientation adjustment,the frequency of changing BHA for trajectory control was dramatically cut down,and the drilling period was also shortened in certain degree.

10.3969/j.issn.1000-7393.2003.01.006