陆相砂砾岩油藏裂缝发育特征分析——以克拉玛依油田八区乌尔禾组油藏为例  

Fracture development in terrestrial glutinite reservoir—taking the Lower Wuerhe Formation reservoirs in 8^(th) district of Karmay Oilfield,NW China, as an example

作　　者：申本科[1] 胡永乐[2] 田昌炳[2] 薛培华[2] 张爱卿[2] 李广超[1] 薛大伟[3] 

机构地区：[1]中国地质大学 [2]中国石油勘探开发研究院 [3]中国海洋石油有限公司上海分公司

出　　处：《石油勘探与开发》2005年第3期41-44,共4页Petroleum Exploration and Development

基　　金：中国石油天然气集团公司2004年度石油科技中青年创新基金项目(04E052)

摘　　要：克拉玛依油田八区乌尔禾组油藏是低孔、低渗的块状砂砾岩油藏,裂缝发育,既有构造缝,也有非构造缝。据岩心观察、成像测井和薄片鉴定,将裂缝分为4种类型:微裂缝、斜交裂缝、高角度裂缝和网状裂缝。油藏西部以低角度缝为主,裂缝倾角为0～40°,方位为170～180°;油藏东部多为高角度缝或直劈缝,裂缝倾角为10～60°和80～90°,方位为60～120°和170～190°。认为岩性和局部构造位置是控制该油藏裂缝发育的主要因素,不同岩性交互的层段裂缝发育程度高。构造缝主要为剪切裂缝,裂缝延伸方向与区域最大主应力方向相关,非构造缝为砾缘溶蚀缝等。Structural fractures and non structural fractures developed in the low porosity and low permeability massive glutinite reservoir of Lower Wuerhe Formation in 8^th district of Karmay Oilfield. The core observation, image logging and thin section examination show that the fractures could be classified into 4 types： micro-fractures, bevel fractures, high angle fractures and map fractures. The fractures developed in the west of the reservoir are mainly low angle fractures with dip angle of 0-40℃ and azimuth of 170-180℃ , high angle fractures developed in the east with dip angle of 10-60℃ and 80-90℃ , and azimuth of 60-120℃ and 170-190℃ . The structural fractures are mainly shearing fractures, and the fracture extension depends on the direction of major pressure in the region. The non structural fractures are melting fractures around the conglomerate.

关 键 词：裂缝 构造缝 非构造缝 断层 乌尔禾组 储集层 

分 类 号：TE122.24[石油与天然气工程—油气勘探]