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以澳大利亚库珀盆地二叠系Roseneath组和Muteree组页岩样品及测井数据为基础,综合利用地球化学分析、测井解释和岩心分析技术对Roseneath组和Muteree组页岩进行矿物模拟及岩石物性参数研究,评估这两套页岩的页岩气资源潜力。综合岩心和岩屑样品分析得到的沉积学、岩相学、扫描电镜(SEM)和X射线衍射(XRD)数据,建立目的层矿物模型;基于岩心和岩屑的常规岩心分析结果、伽马测井资料、扫描电镜分析结果、XRD分析结果、地球化学和岩相学分析结果,针对关键井进行岩石物理建模。利用所建模型对两套页岩进行矿物成分模拟和岩石物性参数分析。Roseneath组页岩和Murteree组页岩均由黏土、石英、碳酸盐和干酪根组成,还含有少量副矿物,如长石、菱铁矿等。根据孔隙度、渗透率、TOC、含水饱和度、矿物组成等结果判断,Murteree组页岩在盆地范围内的资源潜力比Roseneath组页岩更好,潜力区在Encounter 1井区及其周边地区。
Based on the samples of Permian Roseneath and Muteree shale samples from the Cooper Basin in Australia and their logging data, geochemical analysis, logging interpretation and core analysis techniques were used to simulate the mineralization and petrophysical properties of the two groups of shale, Roseneath and Muteree Parametric studies to assess the shale gas potential of these two shales. Based on the analysis of sedimentology, petrography, scanning electron microscopy (SEM) and X-ray diffraction (XRD) data obtained from the analysis of core and cuttings samples, the target layer mineral model was established. Based on the results of conventional core analysis of core and cuttings, Well data, SEM results, XRD analysis results, geochemical and petrographic analysis results, and petrophysical modeling of key wells. The model was used to simulate the mineral composition and petrophysical parameters of two sets of shale. The Roseneath shale and Murteree shale are composed of clay, quartz, carbonate and kerogen and also contain small amounts of paratons such as feldspar and siderite. Judging from the results of porosity, permeability, TOC, water saturation, and mineral composition, the Murteree shale resources potential in the basin range is better than that of the Roseneath shale. The potential area is in the Encounter 1 well and its surrounding area.