准中征沙村区块定向防塌钻井液技术
Fault-Block Oil and Gas Field（2015）
Abstract
征沙村区块地质构造复杂,直井施工中井壁失稳严重,完井时效长.为保证定向钻完井成功率,根据区块地质情况及钻井液技术难点分析,确定了钻井液体系优选思路.在优选主要处理剂的基础上,研发了铝胺抑制防塌钻井液体系.实验结果表明,该体系具有较强的抑制性及封堵性,油层保护性能好.该体系在征沙村区块征1-斜3井和征1-斜5井进行了现场应用,通过辅助相应的钻井液现场维护处理工艺,施工中井壁稳定,润滑防卡、油层保护效果好,钻井时效和完井时效明显提高,达到了优快钻井的目的.
MoreKey words
borehole wall instability,aluminium and amine,high inhibition,high formation sealing,reservoir protection,Junggar Basin
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