摘要
基于有限元分析 ,提出一种新的三维构造面连续恢复算法———逆位移梯度法 ,避免了非连续恢复中因拼贴方案不同而可能导致得出不同恢复结果的问题 ,同时减少输入数据 ,且易于编程。以辽河坳陷滩海区东部沙三段底面构造恢复为例 ,验证该算法的有效性。恢复结果表明 :①东西向的伸展构造变形量分布不均匀 ,南部小 ,北部大 ,因为所处的构造变形特征不同 ;②东部近东西向的次级断层组的滑线方向基本上与断层走向垂直 ,没有明显的走滑位移分量 ,应属于正断层范畴 ,不支持北北东向边界断层走滑派生出近东西向次级断层的观点。
A novel algorithm of restoration of 3 D deformed surfaces was developed while adopting the theory of finite element. It is in the category of continuous restoration that is realized by constructing the reverse displacement gradient. Over most existing algorithms that belong to discontinuous restoration, it has the advantages of less data to be input and easiness to be programmed. An example from the bottom of Eocene-Oligocene Shahejie Formation in the eastern inshore of the Liaohe oil field was taken and applied to. The result showed that extension along the W E direction varies from the northern part to the southern with the deformational styles, and that approximately E W trending smaller faults in the vicinity of the NE trending boundary fault have a nearly dip slip without any apparent strike slip component, as a school of geologists expect who agree that these secondary fault formed in a response to the strike slip of the boundary faults.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2002年第5期37-40,共4页
Petroleum Exploration and Development
基金
中国科学院资源环境领域知识创新工程重要方向项目 (KZCX2 113 )
