川西须二段岩石力学及动静参数转换模型研究  

Study on Rock Mechanics and Dynamic-static Parameter Transformation Models in the Second Member of Xujiahe Formation in West Sichuan Basin

作　　者：李凯[1] 冉超[2] 邵孟璟 钟颖[1] 邵振滨 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,成都610059 [2]成都理工大学能源学院,成都610059

出　　处：《科学技术与工程》2016年第6期17-22,共6页Science Technology and Engineering

基　　金：国家自然科学基金课题(51374044)资助

摘　　要：岩石力学参数是制定钻井、完井及油气藏开发方案的重要依据。选取川西须二段地层95块岩心,利用"MTS岩石物理测试系统"在模拟实际地层条件下测试岩心的岩石力学特征。研究表明岩石力学参数(抗张强度、抗压强度、弹性模量、内聚力、内摩擦角等)与各基础参数(密度、声波等)之间的相关性较好,实际应用中可根据资料选用相应统计关系式进行岩石力学参数的预测和计算。结合测井资料表明,动态弹性参数普遍大于静态弹性参数,且关系密切,动静态杨氏模量之间具有较好的线性关系,动静态泊松比之间的关系则非常复杂,其余弹性参数可利用它们之间的相互关系转换得到。通过对国内外的动静弹性参数转换模型调研,结合岩心刻度测井建立了适合川西须二段地层的岩石动静态弹性参数转换模型,为设计合理的钻探开发方案提供了一定的理论基础。Rock mechanical parameters are key factors of making drilling, completion, and other reservoir development programs. 95 cores were collected from the second member of Xujiahe formation in west Sichuan Basin and ＂MTS petrophysical test system＂ was employed to measure rock mechanics characteristics at simulated formation condition. Results indicate that rock mechanical parameters （tensile strength, compressive resistance, elastic modulus, cohesive force, angle of internal friction and so on） correlates well with primary parameters （ density, acoustic wave and so on）. In field application, the corresponding correlation can be selected to predict rock mechanical parameters.Logging data indicate that ①dynamic elastic parameters are larger than static ones universally; ② dynamic Young＇s modulus correlates well with static ones; ③and relation between dynamic Poisson ratio and static Poisson ratio is complex. Relation between other dynamic and static elastic parameters can be drawn by the correlations above. Based on domestic and overseas dynamic-static parameter transformation models, core calibration logging data were employed to build dynamic-static parameter transformation models that suits for the second member of Xujiahe formation in west Sichuan Basin, which lays theoretical foundations for making drilling and exploration programs.

关 键 词：须家河组 岩石力学 动静参数转换 弹性模量 泊松比 

分 类 号：P554[天文地球—构造地质学]