摘要
准噶尔盆地地层压力分布复杂,长期以来由于地层压力预测不准,在钻井过程中常出现井壁失稳、卡钻、井壁坍塌、钻井液漏失等工程事故,严重影响了钻井速度.为减少工程复杂问题,准确预测地层压力至关重要.为此,在准噶尔盆地开展了断层相关褶皱理论解释复杂构造、利用地质构造建模指导速度建模,求出每层的层速度和真倾角,再用Terzaghi理论计算地层孔隙压力,计算结果证实地层压力预测精度显著提高.
The character of formation pressure distribution in the Junggar Basin is complex. For a long time because it is not precise to predict formation pressure,there are many engineering accidents such as wall of a well losing steady state,blocking drill, wall of a well collapsing, drilling fluid leaking and so on. For reducing engineering complex problem,it is very important to predict formation pressure truly. Therefor , we have developped interpreting methods for complex structure by correlative fault fold theory , instructing velocity model by geologic structure modeling, computing interval velocity and true dips of every layer, and then computing formation pore pressure by Terzaghi theory in the Junggar Basin. The research result proves that the precision of formation pressure prediction is improved remarkably.
出处
《地球物理学进展》
CSCD
北大核心
2009年第4期1377-1383,共7页
Progress in Geophysics
基金
中国石油新疆油田公司重点科研攻关项目“准噶尔盆地地震速度库应用系统建设及应用”(2006204)资助
关键词
准噶尔盆地
速度模型
地质构造模型
压力预测
静校正
junggar basin,velocity model,geologic structure model,pressure prediction, static correction
