优化的方位各向异性裂缝预测方法及应用  

An optimized method of fracture prediction based on P-wave anisotropy and its application

作　　者：李雷涛[1] 肖秋红[1] 肖伟[1] 

机构地区：[1]中国石化勘探分公司研究院,四川成都610041

出　　处：《断块油气田》2016年第4期455-459,共5页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项课题"碎屑岩层系大中型油气田富集规律与勘探关键技术"(2011ZX05002-004)

摘　　要：在纵波方位各向异性裂缝预测中,传统的方位角划分方法选择保留全方位角覆盖偏移距,切除方位角覆盖不均匀的远偏数据,这种做法损失了大部分远偏数据,容易造成裂缝预测结果的不准确。文中根据研究区的数据情况对方位角划分方案进行了优化,在保留全方位角覆盖偏移距的基础上,适当保留了部分大偏移距数据,切除了部分小偏移距数据。优化的方位角划分方案在研究区应用效果精度更高,验证了该优化方案的合理性和有效性。The traditional method of azimuth dividing in P-wave azimuthal anisotropy fracture prediction reserves full-angel offsets and cuts some far offsets, which has uneven coverage and causes inaccurate fracture prediction. According to the data in the study area, this paper optimizes the method of azimuth dividing. The optimized method reserves some far offsets and cuts some nearly offsets. The final fracture prediction in the study area, which was carried out by the optimized method, is more accurate. It shows this method is reasonable and applicable in the study area.

关 键 词：远偏数据 方位角道集最大偏移距 方位各向异性椭圆拟合 裂缝方向 裂缝密度 

分 类 号：TE122.321[石油与天然气工程—油气勘探]