Paleogeomorphy, provenance system and sedimentary system of the Dongying formation in the Qikou sag

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• 作者：Hua WANG ; Chuan-yan HUANG ; Shu-e ZHAO ; De-tian YAN ; Yun-feng BAI ; Xue-mei XIANG ; Si CHEN ; Cun-yin XIA ; Ji-hua LIAO
• 关键词：paleogeomorphology ; provenance system ; sedimentary system ; Dongying formation ; Qikou sag
• 刊名：Mining Science and Technology (China)
• 出版年：2009
• 出版时间：November 2009
• 年：2009
• 卷：19
• 期：6
• 页码：800-806
• 全文大小：2480 K

文摘

Reconstructed synsedimentary paleogeomorpholgy is an effective method in predicting the distribution of sandbodies and can provide valid evidence in the search for reservoirs. Based on a synsedimentary paleogeomorpholgy reconstruction of the third member of the Dongying formation (Ed₃) in the Qikou sag, the basic paleogeomorphic characteristics of Ed₃ are described and the spatial distributions of denudation and subsidence areas are discussed. Key boundary faults controlling the deposition of important sediment bodies are proposed and the interrelations among faulted slope-break belts or flexure belts, intra-depression uplifts and sags, sediment sources and sediments input points have been investigated. Furthermore, the spatial distributions of the depocenter, subsidence centers and a sedimentary system have been determined. Our results are beneficial in the search for prominent reservoirs in petroleum exploration. Therefore, they are of important theoretical and practical value in discussing the compilation techniques of syndepositional paleogeomorphology, in recognizing paleogeomorphic characteristics and the coupling analysis of provenance and sedimentary systems.