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宝浪油田宝北区块属高陡背斜构造发育区,区内发育多种裂缝类型,对裂缝单元的认识程度直接影响着油田的开发方案及效果。为了对该区块裂缝型储层单元进行表征和预测,综合利用了岩心观察、测井方法和曲率方法,对裂缝的类型、裂缝成因、裂缝预测方法和裂缝分布规律进行了研究。研究表明:①宝北区块储层裂缝主要分为高角度裂缝和低角度裂缝两种类型,它们分别属构造成因和沉积—构造复合成因;②低角度裂缝分布与沉积微相分布一致;③高角度裂缝在区块的南部和构造的轴部较发育,主要靠近断层附近分布。
The Baobei block of Baolang Oilfield is a high-steep anticline tectonic development zone. Various types of fractures are developed in the area. The understanding of the fractured units directly affects the development scheme and effect of the oilfield. In order to characterize and predict fractured reservoir units in this block, core observation, well logging method and curvature method are comprehensively used to study the types of fractures, the causes of fractures, the methods of fracture prediction and the distribution of fractures. The results show that: (1) The fractures in Bao Bei block are mainly divided into two types: high-angle fractures and low-angle fractures, which are caused by structural genesis and sedimentary-tectonic complex formation respectively; ② the distribution of low-angle fractures is consistent with the distribution of sedimentary microfacies; High-angle fractures are developed in the southern part of the block and in the structural axis, mainly near the fault.