水文地质工程地质2016，Vol.43Issue(3)：79-86,8.DOI:10.16030/j.cnki.issn.1000-3665.2016.03.13
含水层储气库泥质岩盖层封气能力定量评价研究——以里坦凹陷D5区二叠系含水层构造为例
Quantitative assessment of the gas-sealing capacity of the Permian claystone caprock for the D5 aquifer gas storage in the Litan sag
摘要
Abstract
Gas-sealing capacity of a claystone caprock has an important impact on the construction of an aquifer underground gas storage.At present,there is no unified standards and methods for the caprock evaluation at home and abroad.Based on the X-ray diffraction and physical parameter tests in laboratory as well as sealing capacity index calculations,the sealing capacity of the Permian claystone caprock was evaluated in this study for the D5 aquifer gas storage in the Litan sag.The results show that the content of clay minerals in the claystone is relatively less than the average value of 49.25％,while the quartz is abundant with the average content of 38.38％.The Permian claystone caprock is a typical rock with high porosity and low permeability.The average porosity is 13.76％,while the order of magnitude of permeability is 10-4 mD and the breakthrough pressure is greater than 38 MPa for the undisturbed rock.The Permian claystone caprock is divided into the direct caprock with the thickness of 50 m and the good indirect caprock,which plays a compensation role in the capacity of capillary sealing.In summary,the Permian claystone of D5 is of good sealing capacity for natural gas storage,but it has high brittleness as the caprock of aquifer gas storage,which is bad for gas injection and caprock deformation.关键词
含水层储气库/泥质岩盖层/封闭能力/突破压力/脆性Key words
aquifer underground gas storage/claystone caprock/sealing capacity/breakthrough pressure/brittleness分类
石油、天然气工程引用本文复制引用
贾善坡,张辉,林建品,魏强,刘团辉,毕扬扬,汤小琪,蒋素萍..含水层储气库泥质岩盖层封气能力定量评价研究——以里坦凹陷D5区二叠系含水层构造为例[J].水文地质工程地质,2016,43(3):79-86,8.基金项目
湖北省自然科学基金(2015CFB194) （2015CFB194）
中国博士后基金(2014M551055) （2014M551055）
华北油田重大科技计划项目(2013HBZ1506) （2013HBZ1506）
