Oil Basins and Subtle Traps in the Eastern Part of China
Ma Li, Ge Taisheng, Zhao Xueping, Zie Taijun, Ge Rong, Dang Zhenrong, 1982. "Oil Basins and Subtle Traps in the Eastern Part of China", The Deliberate Search for the Subtle Trap, Michel T. Halbouty
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With different histories of evolution, the sedimentary basins in east China may mainly be classified into two categories: depressions and faulted depressions, in which there are three types of subtle traps—lithologic traps, stratigraphic traps, and paleogeomorphologic traps. Subtle traps in depressions, consisting mainly of lithologic traps like sandstone lenses, are controlled by the zone of discrete distribution of large deltaic sandstone bodies. Subtle traps in faulted depressions, consisting mainly of buried-hill traps and lithologic and stratigraphic traps like turbidity sandstones and granular limestones are controlled by the structural pattern of the wedge-shaped depressions and the sedimentary facies.
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The papers included in this volume reflect both the geological and geophysical rationale used in searching for the subtle trap. The scope of the papers ranges from the general appraisal papers of new concepts and methods, to those relating to specific fields in the United States, Nigeria, China, Australia, Canada, Oman, offshore Spain, and the North Sea. The 21 chapters are sourced from a 1981 AAPG Annual Meeting session, dedicated to providing explorationists with the information needed to search for and discover the stratigraphic, paleogeomorphic, and unconformity-oriented subtle-trap accumulations of oil and gas.