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《Special Oil & Gas Reservoirs》 2013-06
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Research on Velocity Anisotropy of Organic-rich Shale

WANG Xiao-qiong;GE Hong-kui;SHEN Ying-hao;China University of Petroleum-Beijing;  
Wave velocity and its anisotropy are significant for exploration of deep shale gas,reservoir assessment and prediction of sweet spots. Shale gas play is strongly anisotropic since it is rich in organic matter,with oriented minerals and natural cracks. However,the elastic properties of organic matter,as a key factor,are not easily measured and characterized,because its types,abundance,thermal maturity and organic porosity vary significantly. Until now the laboratory measurements of organic matter are scarce and the influence of organic matter on velocity anisotropy is unclear. Thus,this paper analyzes the different anisotropies between organic-rich shale and conventional mud shale,and investigates and defines the anisotropy characteristics and changes of organic-rich shale. On this basis,an anisotropy measurement is introduced,that is,fine measurement of wave velocity anisotropy. For this method,it is a key and a challenge to investigate the elastic properties of organic matter in shale gas play and the impact of the organic matter on wave velocity and anisotropy. In addition,a physical model of anisotropy for organic-rich shale is presented.
【Fund】: 国家自然科学基金项目“富有机质页岩波速各向异性的实验研究”(41304141);; 中国石油大学(北京)科研启动基金“页岩储层波速各向异性的实验研究”(YJRC-2013-18);; 中国石油大学(北京)引进人才科研启动基金“页岩储层可压性室内评价方法研究”(YJRC-2012-03)
【CateGory Index】: P618.12
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