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Restoration of 3-D deformed surfaces

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.