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Analysis of High-resolution Sequence Stratigraphy and Sedimentary Microfacies in 4th Member of Quantou Formation of Haituozi Area in Jilin Oilfield

Author: JiangZhiQiang
Tutor: ZhangJinLiang
School: Ocean University of China
Course: Marine Geology
Keywords: High resolution sequence stratigraphy Haituozi region Quan 4 Terminal fan Depositional model
CLC: P618.13
Type: Master's thesis
Year: 2009
Downloads: 52
Quote: 0
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Abstract


The small amplitude structure and hidden lithology southern Songliao Basin Haituozi region is located in the central depression Daan - the Honggang order to the southern tip of west Western Slope, East Qian'an depression relatively low degree of exploration of the area, there is a large area oil and gas reservoirs. This paper aims at the regional framework layer and depositional systems, facies of the study, to establish the area sedimentary stratigraphic sequence and evolution of sedimentary facies, based on analysis of of Quan 4 reservoir sands Haituozi causes type and distribution law, the geological scientific basis for the exploration and development of Haituozi. The paper uses the principle of high-resolution sequence stratigraphy, by sequence boundaries cores, logging while drilling and seismic response characteristics of the region Quan 4 Haituozi sequence stratigraphic division, the study area was divided into a long-term cycle, 4 medium-term cycles, and 12 short-term cycles, structure type, analysis of short-term base level cycle sequence identified up \The type of short-term base level cycle (C), and the distribution is developed in the lower 2 subtypes of space and can accommodate space can accommodate. Initially established in Haituozi Quan 4 high resolution sequence stratigraphic framework. Mudstone color values ??in Fig According to the study area Quan 4 Sedimentary period, heavy mineral assemblages and cast thin analyze the data to determine the study area for water oxidation and weak reducing depositional environment, the climate is dry and hot, the source area for the The northeast and southwest, sandstone debris type lithic arkose and feldspathic lithic sandstone. Sequence stratigraphic framework, based on core data logging and particle size analysis data, the establishment of sedimentary facies identification mark, first proposed four Haituozi spring terminal fan deposition system. The study area is located in the middle of the terminal fan subfacies deposited its main distributary channel microfacies near waterways overflowing, far waterways overflowing and mudflats. The terminal fan has different from other types of sedimentary facies, sedimentary structures, parallel bedding is often directly on top of one of the most typical signs, river erosion surface development parallel bedding, sand body rich pelitic bands. Quan 4 Haituozi small layer of sand body planar maps drawn on the basis of the analysis of small layer of sand and sedimentary microfacies plan as well as the deposition of the sedimentary microfacies micro compared to the cross-sectional view, the eventual establishment of the end of the study area fan depositional model of the sedimentary system to identify and describe the distribution characteristics of the sand body and the space-time evolution.

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Fuel deposits > Oil, natural gas
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