THE CHARACTERISTICS AND EVALUATION OF FRACTURES DISTRIBUTION IN XUJIAHE FORMATION IN THE WESTERN DEPRESSION OF THE SICHUAN BASIN
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摘要: 四川盆地西部坳陷须家河组砂岩储层是川西地区主要产气层段,该储层孔隙度、渗透率极低,裂缝是储层的主要渗滤通道,裂缝对储层含气性起重要作用,裂缝特征识别及分布在储层评价中较关键.通过岩心观察、测井资料分析,总结出该储层的裂缝主要为斜交裂缝,缝宽主要集中在0.5~2.0 mm,缝长主要集中在5~50 cm.研究认为该区主要有构造成因裂缝和区域性裂缝,并以丰谷构造为例,用变形应力场模拟法、构造主曲率法和构造滤波法评价了该区构造裂缝的分布,同时用厚度法和地质构造特征评价了区域裂缝的分布特征.Abstract: The sandstone reservoir of Xujiahe Formation in the Western Depression of the Sichuan Basin,is the main gas producing zone of the West Sichuan district.The porosities and permeability of the reservoirs are very poor.The fractures are the major filtration passages in the reservoirs and play an important role in gas containing capability of reservoir.So the feature recognition and distribution of fractures is critical to evaluation of re-servoirs.The author sums up the features of fractures through the analysis of rock core and well log information,and concludes that fractures in the reservoirs are mainly diagonal fractures.The width of fractures mainly is from 0.5 to 2.0 mm and the length of fractures mainly is from 5 to 50 cm.There are two main kinds of fractures in this areas: tectoclase and regional fractures.Taking Fenggu Structure as an example,the author makes the distribution evaluation of tectoclase by the means of distortional stress simulation,structure curvature and structure filtration and distribution evaluation of regional fractures,which has some guide contribution on exploration and exploitation in the areas.
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[1] 林良彪,陈洪德,翟常博等.四川盆地西部须家河组砂岩组分及其古地理探讨[J].石油实验地质,2006,28(6):511~517 [2] 曹烈,安凤山,王信.川西坳陷须家河组气藏与古构造关系[J].石油与天然气地质,2005,26(2):97~102 [3] 朱彤,叶军.川西坳陷致密碎屑岩气藏类型划分及特征[J].石油实验地质,2004,26(6):537~541 [4] 任春,夏响华.典型气藏上方地表化探特征分析:以四川盆地孝泉-新场气田为例[J].石油实验地质,2006,28(2):182~186 [5] 张贵生.川西坳陷须家河组致密砂岩储层裂缝特征[J].天然气工业,2005,25(7):41~43,56 [6] 叶泰然,黄勇,王信等.川西坳陷中段丰谷构造须家河组二段致密砂岩储层油气预测方法研究[J].成都理工大学学报(自然科学版),2003,30(1):85~89 [7] 许同海.致密储层裂缝识别的测井方法及研究进展[J].油气地质与采收率,2005,(3):79~82,92 [8] 张筠.川西坳陷裂缝性储层的裂缝测井评价技术[J].天然气工业,2004,23(增刊):43~45 [9] 童亨茂.成像测井资料在构造裂缝预测和评价中的应用[J].天然气工业,2006,26(9):58~61 [10] 周文.裂缝性油气储层评价方法[M].成都:四川科学技术出版社,1998 [11] 于红枫,王英民,周文.川西坳陷松华镇-白马庙地区须二段储层裂缝特征及控制因素[J].石油大学学报(自然科学版),2006,28(3):25~29 [12] 黄泽光,刘光祥,潘文蕾等.川西坳陷压扭应力场的形变特征及油气地质意义[J].石油实验地质,2003,25(6):75~81 [13] Quillan H Mc.The role of basement fracturing in oil production from the oil fields of the Zagros fold belt in Southwest Iran[J].Proceedings of the International Conference on Basement Tectonics,1986,5:305~306
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