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小曲率半径水平井径向分支井技术在渤海花岗岩中的应用
石油钻采工艺
1996年 18卷 第1期
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Title
SHORT RADIUS HORIZONTAL RADIAL BRONCH WELL IN GRANITE
摘要
渤海石油公司在已钻成的CFD1-6-2D井的基础上,于1995年3月在井深2938m、井斜角72°处,用小曲率短半径水平井径向侧钻技术,在花岗岩地层钻成一口径向分支井,钻井进尺34m,最小曲率半径4.78m,平均曲率半径29m。最大降斜率93.02°/30m,最大狗腿度118.2°/30m,达到了设计要求,获得高产商业油流。通过实践,对当今世界上先进的小曲率短半径水平井技术和工具有所了解和认识,并着重介绍了CFD1-6-2DS任向分支井的一些技术特点和技术措施。
Abstract
This paper introduces a short radius branch well has been drilled in the CFD 1-6-2D old well,which drilled by Bohai Petroleum Coporation.Making use of short radius horizontal drilling and sidetracking techniques,the radial branch well was drilled in granite formation that have 34 meters of total footage,4-78 meters of minimum curvature radius,29meters of average curvature radius,59 degree per 30 meters,93 degree per 30 meters of maximum drop rate and 118.2 degree per 30 meters of maximum dogleg.Also some technique feature and measures about radial branch well are introduced.
关键词：
渤海湾;
大角度斜井;
井眼轨迹;
井斜变化率;
小曲率半径;
钻井;
Keywords:
Bohai Bay;
high angle deviated;
hole trajectory;
deviation rate;
short radius curvature;
drilling;
DOI
10.3969/j.issn.1000-7393.1996.01.003
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