鄂尔多斯盆地东缘临兴区块山西组天然裂缝发育特征与定量预测  

Shanxi Formation Natural Fissure Development Features and Quantitative Prediction in Linxing Block,Eastern Ordos Basin

作　　者：徐延勇[1] 丁万贵 李超[2,3] 张和伟[2,3] Xu Yanyong;Ding Wangui;Li Chao;Zhang Hewei(China United Coalbed Methane Co. Ltd.,Beijing 100011;Ministry of Education Key Laboratory of Coalbed Methane Resources & Reservoir Formation Process,CUMT,Xuzhou,Jiangsu 221008;School of Resources and Geosciences,CUMT,Xuzhou,Jiangsu 221116)

机构地区：[1]中联煤层气有限责任公司,北京100011 [2]中国矿业大学煤层气资源与成藏过程教育部重点实验室,江苏徐州221008 [3]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《中国煤炭地质》2019年第7期1-6,共6页Coal Geology of China

基　　金：国家自然科学基金项目(41672149);国家科技重大专项项目(2016ZX05066-01-04)

摘　　要：鉴于裂缝对致密储层的孔渗性改善的重要作用,一直是煤系致密储层评价研究重点。基于岩心裂缝观测及相关实验结果,分析了研究区山西组致密储层裂缝发育特征,构建了三维地质模型,通过应力场反演和岩石破裂准则,预测了山西组储层裂缝发育程度、演化特征与分布规律。结果显示,研究区天然裂缝表现出高倾角、低开度、低密度和多数未充填的特点,裂缝总体有效性较好;基于数值模拟反演与预测,识别出L-90、L-33~L-84北侧、L-23~L-10北、L-20、L-11西~L-72南等井区裂缝相对最为发育,在本区煤系气勘探开发中应优先考虑。In consideration of fissure significance in compact reservoir permeability improvement, that is always the emphasis of coal measures compact reservoir assessment and study. On the basis of core fissure observations and related test results, have analyzed the study area Shanxi Formation compact reservoir fissure development features, established 3D geological model. Through stress field inversion and rock fracturing criterion have predicted Shanxi Formation reservoir fissure development range, evolution features and distribution pattern. The result has shown that the natural fissures in study area have presented features of high dip angle, low openness and low density, mostly without been filled, better effectiveness as a whole. Based on digital simulation inversion and prediction, have identified in wells L-90, L-33~L-84 north side, L-23~L10 north, L-20, L-11 west^L-72 south have relatively most developed fissures, thus gas exploration and exploitation priority should be given to coal measures in the area.

关 键 词：天然裂缝 发育特征 定量预测 山西组 临兴区块 

分 类 号：P618.13[天文地球—矿床学]