摘要
分析地应力的大小和方向是油气勘探开发中的一项重要工作,油田地应力测量可以通过现场试验或室内实验手段测量地应力大小,但不能获得地应力的纵向连续剖面。利用钻井数据和测井数据结合地应力解释模型能够解决这一问题,其中的关键技术是确定构造应力系数的大小,为此建立了一种根据钻井中的地漏试验数据和钻井液密度、井壁坍塌数据分析构造应力系数的新方法。依据该方法建立井周应力约束条件,能够快速准确得出构造应力系数,进而利用测井数据计算水平主应力大小随井深变化的连续剖面。
It＇s important work to oil and gas exploration and development that evaluating magnitude and orientation of in-situ stress.In oilfield stress measurement,the stress magnitude can be measured by field tests or indoor experiments,but the longitudinal continuous section is unavailable.This question can be solved through ground stress interpretation model with drilling and logging data,in which the key technology is determining the tectonic stress coefficients.Therefore,an analysis method of tectonic stress coefficients was established using data of LOT,drilling fluid density and borehole collapse.According to this method the constraint condition of stress around borehole can be established and the tectonic stress coefficients can be obtained fast and accurately.And then serial section of horizontal principle stress along well depth can be calculated using logging data.
出处
《科学技术与工程》
北大核心
2013年第30期8991-8994,共4页
Science Technology and Engineering
基金
国家科技重大专项(2011ZX05009-005)资助
关键词
地应力
地漏试验
测井数据
构造应力系数
in-situ stress
leak off test
logging data
tectonic stress coefficient
