测井技术2018，Vol.42Issue(2)：181-185,192,6.DOI:10.16489/j.issn.1004-1338.2018.02.010
基于阵列声波测井评价致密砂岩储层地应力
Evaluation of Current Geostress in Tight Sandstone Reservoirs Based on Array Acoustic Logging
摘要
Abstract
Taking the tight sandstone reservoir of the Upper Paleozoic coal measures in the northeastern margin of Ordos Basin as an example,this paper conducts a comprehensive logging evaluation of the rock mechanical properties and geostresses.Based on the results from logging and experiment,relationship between dynamic and static mechanical parameters were obtained. Moreover,geostress was calculated by the fracturing method,which basically satisfies the state of:σh< σH< σv.However,the local geomechanical characteristics show a higher tectonic stress environment.In order to correctly predict the minimum horizontal principal stress(σh)of the tight oil reservoir,a correction coefficient C*is introduced into the New berry model.Considering the anisotropy of formation stress,the unbalanced structural factor(Ub)is introduced to evaluate the maximum horizontal principal stress(σH).Finally,according to the fast shear azimuth,the direction of the maximum horizontal stress is obtained,w hich is NW.关键词
测井评价/声波测井/煤系/致密砂岩储层/地应力/鄂尔多斯盆地Key words
logging evaluation/acoustic logging/coal measures/tight sandstone oil reservoirs/current in situ stresses/Ordos Basin分类
天文与地球科学引用本文复制引用
孙杰文,尹帅,崔明月,吴志均..基于阵列声波测井评价致密砂岩储层地应力[J].测井技术,2018,42(2):181-185,192,6.基金项目
国家自然科学基金项目(41572130) （41572130）
