摘要
研究我国西部地区山前挤压区的地应力分布 ,对油气勘探和开发有重要意义。利用电阻率、声波测井等测井信息间接地定量分析地应力的基本方法是 :先用统计方法建立稳定构造区测井信息与最大地应力之间的关系 ,求得垂向地应力正常分布 ;建立电阻率、声波时差与正常地应力关系的定量统计模型 ;根据山前挤压区井的电阻率、声波时差分布特征选择统计模型 ;应用模型和测井信息定量分析井筒方向的地应力分布 ;将计算结果与实测地应力进行对比 ,相互检验。在塔里木盆地地应力研究中 ,轮南构造稳定区地应力的计算结果与声发射实验结果非常接近 ,山前地区二者一致性较好 ,表明该方法是可靠的。根据不同条件采用适当的地应力统计模型 ,应用测井信息进行单井剖面地应力分析 ,有可能获得连续的地应力纵向分布信息 ,确定井筒方向的地应力分布规律 ,为油气勘探和开发提供依据。
It is very important for pe troleum exploration and development to determine the terrestrial-stress distrib ution of compressional region of western China. The basic steps in quantitative studies of terrestrial-stress by using resistivity logging and acoustic logging are as following: (1)determine by statistic method the relation of the maximum stress with resistivity and acoustic time in the stable field;(2)optimize the s tatistic model through analysis of logging data distribution characteristics in the compressional field;(3)apply the model to calculate terrestrial-stress in Kuqa compressional field and (4)compare the calculated results with the results derived from acoustic log to improve the quantitative model. In this research th e calculations of stress from logging data are close to those from Kaiser Effect experiment. The fact proves that the statistic model proposed here is reliable. It is possible to obtain the quantitative stress and determine its distribution regulation along wells by applying the models to logging data calculations, and this will be much helpful to petroleum exploration and development.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2001年第5期93-95,共3页
Petroleum Exploration and Development
基金
国家级攻关项目 (编号 99- 1 1 1 - 0 1 - 0 1 - 0 2 )部分研究成果
关键词
油气地质
测井信息
定量分析
库车坳陷
地应力
统计模型
Electric logging, Sonic logging, Information process ing, Stress analysis, Quantitative, Evaluation, Extrusion, Structural belt, Kuch e depression
