Jingbian Oil Extraction Plant Fundamental Geological Research Of Qingyangcha Oilfield

This paper uses the theory and research methods of petroleum geology, sedimentary petrology, structural geology and other related disciplines, formation of fine division and correlation with logging data, the system research of tectonic characteristics, sedimentary facies and sand body distribution,reservoir characteristics, reservoir characteristics.Jingbian oilfield qingyangcha oilfield,Chang 2 reservoir is a reservoir and production main, sandstone reservoir to development, belongs to the delta plain subfacies. The reservoir lithology in light gray, gray green, fine fine particle and medium grained feldspar sandstone.The pore types are mainly intergranular dissolution pores and residual intergranular pores.Average porosity is 15.85%, and the average permeability is 24.63 * 10-3 m2, which belongs to the low permeability reservoir, in which the permeability and special low permeability are partially, and the wettability of the rock is hydrophilic. In the region of Chang 1 reservoir group to argillaceous siltstone, silty mudstone, mudstone interbedded combination, constitute a stable distribution of good cover. Chang 2 reservoir top structure is a general appearance in the West monocline background development of large low amplitude nose fold composite structural belt, is constructed on top of the open flat,which developed from west to East with three rows of low amplitude nose fold belt,sandwiched between two parallel extension of the low-lying structures.The axial tectonic belt near the NE-SW direction.The distribution direction of the sedimentary facies belts is roughly the same. Chang 2 reservoir group main microfacies for channel sand dam and river floodplain, interchannl-depression.The main source is northeast,the horizontal distribution of each layer of sand body is strictly controlled by the provenance and sedimentary facies belt distribution control.In general it is northeast southwest trending.The structural fluctuation of the top surface of the 2 sandstone reservoir is very obvious,and the high altitude of the reservoir is often in good oil,and the oil well production is higher,the lower part of the above sea level is often higher.The Chang 2 reservoir in vertical profiles has good water distribution,oil-water interface is relatively clear andobvious in oil, basically have uniform oil-water interface, the overall presentation from north to south, East West High lowStudy on structural features, sedimentary facies, sand body distribution, storage reservoir characteristics, reservoir characteristics, qingyangcha oilfield development provide a strong basis.