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首页> 外文期刊>Journal of natural gas science and engineering >Microstructure and pore system analysis of Barren Measures shale of Raniganj field, India
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Microstructure and pore system analysis of Barren Measures shale of Raniganj field, India

机译：印度Raniganj油田Barren措施页岩的微观结构和孔隙系统分析

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摘要

The parameters of shales in terms of its organic richness, thermal maturity, porosity, permeability, pore & fracture network, orientation of microfractures etc. are the crucial requisites for shale gas exploration and exploitation. In this study, Permian Barren Measures of Raniganj field in Damodar Basin were analysed using thin section petrography, scanning electron microscopy, helium porosimetry, micro computer tomography and x-ray Diffractometer, to assess their petrographic and reservoir characteristics. The Total Organic Content (TOC) of the shale units of Barren Measures ranges from 3.75 to 20.9 wt% with more than 50% quartz content. Carbonaceous silty shales have been analysed using Micro Computed Tomography (mu CT) system to evaluate pore system, fracture network, fabric anisotropy and mineral component of the shale and verified that allocations of pores and mineral grains in Barren Measure shales are highly anisotropic. A porosity range of 3%-5% are achieved by mu CT, where pores are mostly nanopores, micropores, mesopores and macropores. Presence of scattered and pore filling organic matters are analysed in both thin section and SEM images, the morphology and sizes of pores behave a wide range from <10 nm to >100 mu m. (C) 2015 Elsevier B.V. All rights reserved.
机译：页岩的有机富集度，热成熟度，孔隙度，渗透率，孔隙和裂缝网络，微裂缝的定向等参数是页岩气勘探和开发的关键条件。在这项研究中，使用薄层岩石学，扫描电子显微镜，氦气孔隙率法，微型计算机断层扫描和X射线衍射仪分析了Damodar盆地Raniganj油田的二叠纪贫瘠措施，以评估其岩石学和储层特征。贫瘠措施的页岩单元的总有机含量（TOC）为3.75至20.9 wt％，石英含量超过50％。已使用微型计算机断层扫描（mu CT）系统对碳质粉质页岩进行了分析，以评估页岩的孔隙系统，裂缝网络，织物各向异性和矿物成分，并验证了Barren Measure页岩中孔隙和矿物颗粒的分布是高度各向异性的。通过mu CT获得的孔隙率范围为3％-5％，其中孔主要是纳米孔，微孔，中孔和大孔。在薄片和SEM图像中分析了分散的和孔隙填充的有机物的存在，孔隙的形态和大小表现出从<10 nm到> 100μm的宽范围。 （C）2015 Elsevier B.V.保留所有权利。

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