焦石坝页岩气储层黏土组分特征及其体积分数计算  

Clay mineral component characteristics and volume fraction calculation for Jiaoshiba shale gas reservoir

作　　者：王燕[1] 冯明刚[1] 魏祥峰[1] 李素兰[1] 刘帅[1] 

机构地区：[1]中国石化勘探分公司勘探研究院,四川成都610041

出　　处：《断块油气田》2015年第3期301-304,共4页Fault-Block Oil & Gas Field

基　　金：中国石油化工集团公司重大专项"四川盆地周缘下组合页岩气形成条件与有利区带评价"(P13129)

摘　　要：黏土矿物是焦石坝构造页岩气储层的重要组成部分,其特征及体积分数对页岩气藏的开发效果有着较大影响。文中结合区域地质特征,分析黏土矿物体积分数变化趋势及其与有机质之间的关系,定性认识黏土矿物间孔,建立测井计算模型,定量计算黏土矿物及其组分体积分数。实践证明,页岩气储层中黏土矿物总量较低,且与脆性矿物体积分数具有"镜面"特征,测井计算模型能够较为准确地计算出黏土矿物绝对体积分数。该方法在焦石坝构造五峰组—龙马溪组页岩气储层评价中,取得良好应用效果。Clay mineral is an important part of shale gas reservoir in Jiaoshiba structure. The clay characteristics and volume fraction have great impact on shale gas development. Combined with the regional geology characteristics, the change trend of clay volume fraction and its relationship with organic matter are analyzed, the inter-grain pore of clay mineral is qualitatively understood, the logging calculation model is established and the clay mineral components and its volume fraction are qualitatively calculated. Practice has proved that the overall amount of clay minerals in shale gas reservoir is low and has the ＂mirror＂ features with the volume fraction of brittle mineral. Logging calculation model can calculate accurately the absolute volume fraction of clay mineral. This method applies in the evaluation of Wufeng-Longmaxi Formation shale gas reservoir in Jiaoshiba structure, achieving good application effect.

关 键 词：黏土矿物间孔 黏土体积分数 页岩气 焦石坝 

分 类 号：TK122.24[动力工程及工程热物理—工程热物理]