Accumulation Process Research Of Lower First Member Of Shahejie Formation In North Section Of Lixian Slope

Lixian slope is located in the the secondary structure of the Western Raoyang sag of the middle of Jizhong depression’s one of the West dipping to the East, the North East to lift the succession-relief slopes developed on the pre Paleogene palaeouplift inheritance, is the key area of oil and gas evaluation in recent years. While the northern section of the region is more accumulation of oil and gas, but were scattered in the plane. In the area of oil and gas accumulation conditions are complex and changeable, Years of exploration study showed that the main source rocks for the Es3 source rocks and sand section source rocks,the main hydrocarbon source rock is sand section source rocks. But the specific sources of oil and gas, hydrocarbon migration and accumulation patterns are not clear unified understanding. North section of Lixian slope has very favorable conditions for hydrocarbon accumulation and greater resource potential. But with the deepening of exploration, prospecting also increasing difficulty. To clarify further exploration, select exploration targets, we must have a more clear understanding of the forming conditions of the region.The master’s thesis is based on the full collection predecessors regional tectonic depression, sequence, sedimentary and so on research for the issue in the presence of lower first member of shahejie formation in north section of Lixian slope for Raoyang depression, in petroleum geology, oil and gas geochemistry, petroleum system and hydrocarbon accumulation dynamics theory, Hydrocarbon source rock samples were collected to do analysis and analysis of fluid inclusions, on the north section of Lixian slope oil and gas distribution, the source of oil and gas and oil and gas reservoir formation period time study, to clarify the accumulation of oil and gas of lower first member of shahejie formation in north section of Lixian slope.The thesis mainly used in oil source correlation and methods of fluid inclusions have analysis at the accumulation process of north section of Lixian slope. Characteristics of hydrocarbon source rocks in the main analysis of the collected source rock organic matter abundance, type, maturity and burial history data. According to the data of the oil source correlation to analysis region is the main source of oil and gas. Fluid inclusions analysis to determine the hydrocarbon filling periods and accumulation time, determine themigration path of oil and gas and reservoir forming pattern, so as to analyze the whole process of accumulation.Have hydrocarbon source rock analysis shows that the organic matter types of hydrocarbon source rock of lower first member of shahejie formation in north section of Lixian slope, high abundance, hydrocarbon generation potential. More oil in early late unripe immature, wide distribution of the hydrocarbon source layer. Display from 28 samples of crude oil and shale oil source correlation, crude oil samples of parity advantage is not obvious,phytane advantages, gammace rane content is relatively high, showing the oil formed in the brackish water reducing sedimentary environment, sterane maturity parameters of crude oil shows the characteristics of immature. The analysis of fluid inclusions, oil inclusions characteristics of fluorescence spectra and spectral parameters shows that the study area of fluorescent color has two kinds of yellow green and blue green. Explain the area in the early filling the reservoir suffered damage, Early capture the yellow green fluorescence oil inclusions represent the first period accumulation.Capture the second stage with blue green floured science oil inclusions represent the second stages of reservoir. The use of oil inclusions maturity parameters of hydrocarbon migration direction tracking display, near the site of hydrocarbon with two hydrocarbon charging period time than earlier parts of hydrocarbon raw strip away all relatively late, to infer hydrocarbon source rocks of oil and gas generated by G42 well moved to the north of G59 well area, the main direction of migration is from SE to NW.