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New brittleness indexes and their application in shale/clay gas reservoir prediction
Author(s): 
Pages: 117-124
Year: Issue:  1
Journal: Petroleum Exploration and Development

Keyword:  relative-brittleness indexmineral brittlenesselastic brittlenessrock physics templateshale gas;
Abstract: 针对油气勘探中普遍使用的脆性因子的缺点,构建了两个新的相对脆性因子(弹性参数脆性因子和矿物脆性因子),以准确预测脆性泥页岩的空间展布.弹性参数脆性因子利用测井、地震得到的弹性参数(弹性模量和泊松比)评价储集层脆性,这些参数能够反映储集层原位物理性质;根据弹性参数脆性因子确定泥页岩中主要矿物的脆性系数,构建与每种矿物脆性系数及体积分数相关的矿物脆性因子.所构建的两个脆性因子有一定的理论优势并能够较合理地对测井、叠前地震资料反演结果进行解释.根据富有机质泥页岩岩石物理模型,建立矿物-弹性参数-脆性因子的岩石物理量版,对测井资料进行分析以得到优质脆性泥页岩的弹性参数特征,并将其应用于解释叠前地震资料反演结果,得到优质含气脆性泥页岩的空间分布范围,所预测的优质含气脆性泥页岩分布与测井资料对应较好.
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