余琪祥1,余风华2,史政1
Yu Qi-xiang1,Yu Feng-hua2,Shi Zheng1
摘要:
异常高压油气藏是塔里木盆地台盆区重要的勘探目标,其中巴什托构造于泥盆系东河塘组、石炭系巴楚组、小海子组和下二叠统南闸组发现了异常高压油气藏。利用钻井测井与试油气资料,根据X-射线衍射黏土矿物含量、突破压力与比表面积等实验分析结果,探讨巴什托构造异常高压特征与成因。研究表明,石炭系—二叠系处于晚成岩作用阶段,黏土矿物大量脱水、天然气充注和存在欠压实带是形成巴什托构造异常高压的主要原因。高矿化度封闭型地层水、高突破压力的Ⅰ类和Ⅱ类泥岩和膏盐岩盖层是保持巴什托构造异常高压的重要条件。
中图分类号:
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