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The Restored Eroded Thickness and Prototype Basin of Kongdian Formation and the Fourth Member of the Shahejie Formation in Dongying Depression

Author: BianFengQing
Tutor: JiangSuHua
School: Ocean University of China
Course: Mineral prospecting and exploration
Keywords: Dongying Depression Kongdian Shahejie Erosion thickness Prototype basin
CLC: P618.13
Type: Master's thesis
Year: 2009
Downloads: 342
Quote: 5
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Abstract


Prototype basin restoration is a very difficult problem, but it has a very important practical significance for oil and gas exploration, geologists are facing today. The paper in order to restore the original thickness, erosion thickness to strike a prototype basin restoration focus, combined with the analysis of tectonic evolution, recovery of the Kongdian - the Shahejie prototype Basin thickness for the prediction and discovery of oil and gas resources as well as a favorable target in the delineation of the oil and gas exploration when providing geological basis. Lijin Sag Minfeng subsag, Niuzhuang sag, Boxing depression with compaction curves are similar, northern steep slope zone, southern ramp zone of the central anticline belt compaction curve similar recovery of the original thickness. Depressions with thick strata deposited compaction factor. The actic gentle slope belt to thin deposition, compaction factor relatively small. Wave analysis method for the first time to strike the erosion thickness applied to the Dongying Depression, First wave equation analysis principle, derived of depression formation and development cycle wave 110 Ma, 25.4 Ma, 12.5 Ma, 12.5 Ma periodic wave reflected depression within different sedimentary discontinuity denudation, to determine the scope of regional denudation; then sedimentation rate method, optimized porosity, the stratigraphic correlation Law, close to the thickness ratio method to restore local Denudation final weighted average final Denudation thickness. The erosion thickness larger areas are mainly concentrated in the the depression edge or boundary fault near. The hole Sec denudation thickness 100-300m; the denudation thickness Kongdian 0-300m; the Shahejie denudation thickness from 0 to 250 m. Through the preparation of the original thickness map and denudation thickness map, combined with the results of the study of the ancient structure, that can get Kongdian - the sand four of prototype basin thickness contour map. The results show that: (1) in hole two sub, Dongying Depression northern deposition center by the two deposition Center NW control to Chen South tomography (East), Chen Nan downthrown side of the fault, a Lijin Sag a is Minfeng subsag; the Dongying Sag southern, the Ishimura fault in NW, NE to Gaoqing faulting, Boxing depression began to take shape. The deposition thickest zone is located in Lijin Sag northern; (2) in the hole a sub-period, the development of the fault has inherited trap controlled by the fault depression also inherited development. Depression in northern Lijin with Freeman Sag the two depressions continue to develop; south of Dongying Depression, by NW fault to the Ishimura, NE to Gaoqing faulting, Boxing depression continues to develop. Deposition in the thickest region is located in a the Lijin depression northeast; (3) the fourth sub of the central uplift belt formation is divided into northern and southern part of the depression north, the northern part of the Lijin Sag Minfeng sag, southern formation Niuzhuang sag Boxing depression continues to develop. The deposition of the thickest region is located in Lijin Sag Central.

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