页岩气储层孔缝结构的多尺度探测及描述方法研究

项目名称： 页岩气储层孔缝结构的多尺度探测及描述方法研究

项目编号： No.41304107

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 孙朗秋

作者单位： 中国石油大学（北京）

项目金额： 25万元

中文摘要： 本项目以解决我国页岩气勘探开发技术难题为目标，从纳米级孔隙结构到地震分辨率线度的多个尺度来研究页岩气藏的孔、缝分布及其中多相流体运移的复杂机理，定量分析它们与测井和地震属性的关系。应用纳米和微米CT及FIB-SEM设备，结合计算岩石物理方法精确刻画低孔渗、各向异性页岩气藏基质和有机质的孔隙结构、微裂缝密度、渗透率和脆性指数。应用我们独有的准静态应力-应变仪、声共振谱仪等多频段设备研究宽频带、多尺度地球物理综合建模方法，确定页岩气储层关键参数与测井、地震属性的定量关系。研究结果将为页岩气藏甜点的测井-地震综合识别，为储层描述、水平钻井和多级分段压裂开采提供关键参数和指导，为发展我国页岩气藏地球物理勘探方法开创新思路。

中文关键词： 页岩气储层；孔隙结构；多尺度；数字岩心；岩石物理

英文摘要： This project aims for resolving the difficulties in exploration and development for shale gas in China. The pore-fracture distribution and the mechanisms of the complex movement of the multi-phase pore fluids in shale gas reservoirs, as well as their effects on well logging and seismic attributes, will be quantitatively studied in multiple scales from nanometer pore structures up to the resolution lengths of seismic exploration. Using the nanon and micron CT and FIB-SEM apparatus and integrating the computational rock physics methods, pore structure in the matrix and the organic matter, micro-crack density, permeability, and brittleness of a low permeability, anisotropic shale gas reservoir will be precisely delineated. Using our particular multi-frequency facilities, such as quasi-static stress-strain equipment and a sonic resonance spectrometer, we will study the broad-band multi-scale methods of integrated geophysical modeling, and will investigate the quantitative relations of key reservoir parameters to well logs and seismic attributes for shale gas reservoirs. The research results will provide critical parameters and guidelines for integrated identification of the sweet spots in shale gas reservoirs, and for reservoir characterization, horizontal drilling, and multi-stage hydraulic fracturing. This pr

英文关键词： shale gas reservoir；pore structure；multi-scale；digital core；rock physics