十屋油田营城组储层裂缝预测

利用古构造应力场二维数值模拟,对十屋油田营城组储层岩体的破裂程度进行预测,计算出研究区岩体的破裂接近程度,确定了岩体破裂程度与裂缝发育的关系以及裂缝的发育级别,对裂缝的产状和分布作出较为精细地预测和描述。研究表明,十屋油田营城组储层裂缝主要发育在断层部位及其附近地区;储层在两期构造应力场作用下共形成了2期4组裂缝;裂缝主要发育方位为北东向和近南北向。

Fracture prediction in YingCheng Formation of Shiwu Oilfield

By using of paleo-tectonic stress field in two-dimen-sional numerical simulation,this paper predicted the extent of the rupture of rock of the study area and classified the coefficients of cracked approximation degree of the rock,deter-mined the relationship between the coefficients of cracked degree of the rock and fracture,the developmental level of fracture,and gave a general prediction to the fracture growth,types and azimuth of fracture.The prediction result shows that fractures in YingCheng reservoir are more devel-oped in fault and nearby ;two stages'(four groups aggre-gately)fractures,which categories are mainly early stage and late stage.main extensional directions of these fractures are SN,NE.