摘要
运用有限元方法对柴达木盆地尕斯库勒油田跃灰1井区E23油藏进行了古构造应力场数值模拟和裂缝预测,给出了主要油层分布段的古构造应力场及裂缝方位和密度分布特征。裂缝的方位在不同构造部位和不同的深度有一定的差别,剪切缝主要为北东东向和北西西向,横张裂缝主要为近东西向,纵张裂缝主要为近南北向。构造轴部和高部位裂缝比翼部和低部位发育,随着构造埋深的增加,裂缝发育程度增强。
The numerical simulation and fractural prediction of paleotectonic stress field of E 23 reservoir in Wellblock YH-1of Gaskula oilfield,Qaidam basin are made with finite element method,and the paleotectonic stress field of distributed main oil zones and their fractural orientation and density distribution characteristics are obtained.It shows that there exist differences of the fractural orientations in different tectonic parts and different depths,with NEE and NWW for the shear fractures,near EW for the lateral tension fractures and near SN for the vertical tension fractures.In axis and higher parts of the tectonic,fractures de-velop well than flank and lower parts,and with increase of the tectonic buried depth,fractures tend to more and more develop-ment.
出处
《新疆石油地质》
CAS
CSCD
2003年第6期536-539,共4页
Xinjiang Petroleum Geology
关键词
应力场
数值模拟
有限元方法
柴达木盆地
Qaidam basin
Gaskula oilfield
reservoir
stress field
numerical simulation
fracture
