牛35断块沙三中储层裂缝预测

Reservoir fracture forecast of mid-Shasan member in Niu 35 fault block

分别应用古构造应力场模拟、剖面曲率、分形分维和应变模拟等方法,对牛庄油田牛35块沙三中储层裂缝进行预测,并充分考虑影响裂缝发育的众多因素,对预测结果进行相互验证。结果表明:古构造应力场模拟法适合于力学成因的构造缝预测,剖面曲率法适合于褶皱相关裂缝的预测,分形分维法适用于岩心资料丰富的地区,应变模拟法适合于单一岩性储层的构造缝预测;牛35断块沙三中储层裂缝主要分布于断层附近,裂缝主要延伸方向与断层走向一致。

Reservoir fractures of mid-Shasan member in Niu 35 fauh block were forecasted by using Paleotectonic stress field simulation, profile curvature, fractal and strain simulation. Multitudinous factors influencing fracture development were considered and the forecast results were verified by each other. The results show that Paleotectonic stress simulation fits forecasting tectonic fracture of mechanical origin, profile curvature fits forecasting fracture correlated to fold and fractal fits the area with abundant core data, while strain simulation fits forecasting tectonic fracture in unique lithology reservoir. Fractures in mid-Shasan member in Niu 35 fault block are mainly distributed around faults and the main extending direction of the fractures is consonant with fault strike.