顺北区块火成岩侵入体井壁稳定分析及对策
Inner Mongolia Petrochemical Industry（2021）
Abstract
塔河油田顺托果勒低隆北缘(即顺北区块)为中国石化西北油田分公司探明的重点区块,储层埋深约7500米,属碳酸盐岩海相油气藏构造.随着顺北区块勘探开发进度的展开,多口井在钻井过程中钻遇辉绿岩侵入体时掉块严重,导致井下频繁蹩钻、阻卡,本文通过对火成岩侵入体的特性分析,根据顺北区块实际情况,针对钻井液技术难点,对该区块钻井液配方和关键处理剂进行了优化和改进;对封堵防塌配方进行了模拟实验,优选了复合润滑配方,提高了钻井液的抑制性、封堵性、固壁性.
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