摘要
岩心和成像测井等资料表明,酒西盆地青南凹陷下白垩统发育北东-南西走向和北西-南东走向的一对共轭切层缝,它们是青西油田下白垩统油气藏储集层中的重要裂缝类型。通过对青西油田下白垩统沉积特征、成岩作用和构造应力场的综合分析,认为在窟窿山冲断片北部的窿7-窿4井区以及柳沟庄冲断片,发育大量北东-南西向切层缝,其数量明显多于北西-南东向构造切层缝;在窟窿山冲断片南部的窿8-窿10井区,发育大量北西-南东向切层缝,与北东-南西向构造切层缝相比,前者在数量上占主导。这些占据主导地位的切层缝,其雏型是差异压实作用形成的,在构造应力作用下进一步发育和定型。
In Lower Crataeeous in Qingxi sag of Jiuxi basin occurs a eouple of NE-SW and NW-SE trending conjugated bedding-dissected fractures based on core and imaging logging data. The fractures are the major types in Lower Crataeeous fractured reservoir in Qingxi sag. According to comprehensive analysis of Lower Crataceous sedimentation and diagenesis and tectonic stress field, a great deal of NE-SW trending bedding-dissected fractures occur in Well Area Long-7 to Long-4 of Kulongshan thrust section and Liugouzhuang thrust section, while in Well Area Long-8 to Long-10 NW-SE trending such fractures are dominant, but the number of the former is predominant. These dominant fractures are formed by initial eompaetion followed by tectonic stress action.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2008年第6期703-705,共3页
Xinjiang Petroleum Geology
