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Research the Oil Genetic Mechanism of Haita Basin Central Rift

Author: MiaoYue
Tutor: ShenJiaNian
School: Northeast University of Petroleum
Course: Geochemistry
Keywords: Haita Basin geochemical features oil-source correlation hydrocarbon origin mechanism
CLC: P618.13
Type: Master's thesis
Year: 2011
Downloads: 20
Quote: 0
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Abstract


This thesis is from scientific research topic "Research the Reservoiring Rule of Haita Basin Oil-rich Central Rift".This topic is Hailar Exploration and Development Center, Daqing Oilfield Company of CNPC entrust Northeast Petroleum University development. Mainly because of the researches reservoiring rule of Haita Basin before are limited to sag range, no basin scale of unified recognition.As for the actual problems of Haita Basin, conduct hydrocarbon characteristics, source and causes of research., By GC, GC-MS combination technology, carbon isotope analysis and biological symbol combined identification technology, and combining with new data and geological research, adopting new ideas, statistics and analysis of the geochemical characteristics of crude oil; By oil-oil and oil-source correlation, determine the oil source. According to the physical properties and maturity index fine division of crude oil, and combining with geological research, analyses the hydrocarbon origin mechanism of Haita Basin.Haita Basin is typical of faulted basin, oil geological conditions are complex, each sag has much material sources, near material sources, narrow phase belt, phase change big etc characteristics. Major hydrocarbon source rocks are n1 upper and tsyxd.First through the statistics and various pictures analyse petroleum geochemistry characteristics, the overwhelming majority inherited source rocks characteristics, and depends on the source rocks maturation and organic types; After using biomarker compound Pr, Ph and maturity parameters C29ααα20S/(20S+20R) and C29-ββ/(αα+ββ), Ts/(Ts+Tm)与ΣC27 rearrangement/ΣC27rules and carbon isotope, correlating oil-oil and oil-source, The crude oil of Haita Basin are from n1 upper and tsyxd rock-sources; Last according to the physical properties and maturity index fine division of crude oil, and combining with geological research, draw the hydrocarbon origin mechanism.Hatai Basin most is reservoiring nearly sources with short-range migration, Most of the relatively immature oil are early formation of oil migration to edge and gathered.

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