Study On Dynamic Adjustment Mechanism Of Late Himalayan Oil And Gas Reservoirs In Bashtup Oilfield, Tarim Basin

Being the sub-unit of the structure of Bashituopu Oil Field,the Maigaiti Slope of Tarim Basin has long been the hot topic for research.The structure movement of Himalaya has not only had a strong influence on the structure of Maigaiti Slope,but also on the activity of fault,deposits of stratus and the distribution of oil and gas.Under the guidance of previous simulation and the methods of geochemistry of oil and gas,the temperature of fluid inclusions and the restoration of the accurate structure analysis,the author,by studying the features of oil and gas deposits,physical deposits,the chemistry and physics of oil and gas,gives a detailed analysis of the deposits of oil and gas in Bashituopu Field,and finds out the controlling mechanism of oil and gas deposits.In conclusion,the author argues that the mutation of physical features of deposits and the force of structure have a close correlation with the distinctions of the above stratus.Besides,the destruction period is the time when the strong fold began,which happened after the deposits of Xiyu Formation.Moreover,the author thinks that the rules of physical distribution of oil and fields indicate the west-to-east distant movement of crude oil with the degradation of maturity of hydrocarbon.There are two phases of fillings and injections in the research area of the paper,they are in Late Hercynian and Late Himalaya Period respectively.Furthermore,the resource of the early oil and gas is most likely located in the Kashi Sag-Maigaiti Slope and the oil and gas of later period is mainly from the east part of Maigaiti Slope.The Later Himalaya Period shows the most remarkable adjustment to traps,and the later tectonic activity leads to the continuous inclines fluid force field,which have a direct cause to the adjustment of oil and gas.Now,the physical features of deposits and the change of fluid force field forms the continuous remove of oil and gas,which result in the dynamic adjusted oil and gas pools.