宝浪油田宝北区块储层裂缝单元表征及预测

Characterization and Prediction of Fractured Reservoir Units,Baobei District,Baolang Oilfield

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 structure of Baolang Oilfield is a high steep anticline, which is situated in the mid section of the north depression in Bohu Sag, Yanqi Basin. There are many types of fracture. The understanding of the fracture character is directly connected with the effective development. In order to characterize and predict the fractured reservoir units in this district, this paper integrated the data of cores, logging and curvature. This enabled a detailed study of the fracture type, cause of formation, fracture prediction methods and fracture distribution. The results include： （1）There are two types of fractures, high angle fracture （HAF） and low angle fracture（LAF）, caused by structure and complex （structure and sediment） formation individually. （2）The distribution of LAF density has a strong relationship with distribution of sedimentary facies; （3）The density of HAF is higher in south of study zone and tectonic axis region, especially near the faults.