石西油田石炭系潜山火山岩油藏裂缝特征与分布

发布时间：2018-08-29 16:02

【摘要】：裂缝的发育情况对石西油田石炭系潜山火山岩油藏的勘探开发有重要作用。综合利用区域地质、岩心、常规测井、成像测井以及生产动态等资料对研究区裂缝特征及分布规律开展综合研究。研究表明:区内裂缝类型分为构造缝、风化缝、溶蚀缝、收缩缝,其中构造缝(剪切缝)和风化缝比较发育,裂缝总体发育规模中等,宽度较大,密度小,间距大;根据成像测井解释及构造解析,认为该区裂缝分为四期,其中海西运动中、晚期为主要的成缝期;裂缝主要受岩性、岩相、构造位置以及古地貌的控制;裂缝在纵向上主要分布在石炭系顶面以下25~150m范围内,在平面上主要位于断裂带附近、潜山构造高部位以及背斜长轴方向。
[Abstract]:The development of fractures plays an important role in the exploration and development of Carboniferous buried-hill volcanic reservoirs in Shixi Oilfield. Based on the data of regional geology, core, conventional logging, imaging logging and production performance, the characteristics and distribution of fractures in the study area are comprehensively studied. The results show that the fracture types in the area are divided into structural joints, weathered joints, corrosion joints and shrinkage joints, in which the structural fractures (shear joints) and weathered joints are relatively developed, the overall development scale of the fractures is medium, the width is large, the density is small, and the spacing is large. According to the interpretation of imaging logging and structural analysis, the fractures in this area are divided into four stages, in which the late stage of Hercynian movement is the main fracturing period, the fractures are mainly controlled by lithology, lithofacies, structural location and paleogeomorphology. The fractures are mainly distributed in the range of 25 ~ 150m below the top of the Carboniferous system and in the plane near the fault zone, the high part of buried hill structure and the direction of long axis of anticline.
【作者单位】：西南石油大学地球科学与技术学院;中国地质大学构造与油气资源教育部重点实验室;天然气地质四川省重点实验室;中石油塔里木油田分公司;重庆科技学院石油与天然气工程学院;
【基金】：构造与油气教育部重点实验室开放课题(编号:TPR-2016-05) 天然气地质四川省重点实验室开放基金(编号:2016trqdz01)联合资助
【分类号】：P618.13

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