中文摘要：

目的研究新疆油田W油藏砂砾岩裂缝发育特征。方法通过钻井、岩心观察和测井资料进行分析。结果新疆油田W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,其裂缝可分为6种类型：微裂缝、斜交裂缝、高角度裂缝、网状裂缝、雁状缝和钻井诱导缝。结论主角度直劈巨型裂缝给钻井作业和油层开采带来一定难度,由于裂缝近东西向延伸致使注水开发过程中一些油井近东西向水淹严重,而水平缝、低角度缝以及交织网状缝发育于相对疏松的砂砾岩中,可作为油气储集的有效空间之一。

英文摘要：

Aim To study the reservoir W of the Xinjiang Oilfield as a typical low porosity and low permeability reservoir with sandstone and conglometate where both tectonic fractures and none-tectonic fractures are developed.Methods Based on core observation,thin section identification and image logging data,there are six types of fractures： mini-fracture,bevel crossed fracture,hige-angle fracture,net shaped fracture and wild geese shaped fracture,and induced fracture.Among them,low-angle fractures with the deviation 0～40°and azimuth 170～180°,and high-angle or vertical fractures with the deviation 10～60°or 80～90°and azimuth 60～120°or 170～190°,are presented.Results It is believed that the fractures are developed mainly and controlled by lithology of the formation and local tectonic position, and that the fractures crossed by different zones with different lithologies are more developed.The tectonic fracture are mainly sheared fractures whose directions are related with the direction of area′s main sress.Conclusion High-anglefracture brings a certain difficurty for oil drilling operations and exploitatron because the palfure exlends nearly in east-west,some oil fields has been flooded seriously in the process of water injection,but horizontal-angle fracture and lower-angle fracture develop in the relatirely loose sandstone,so it can be used as one of effetine reservoir space fovoil and gas.