Analyze Of The Main Controlling Factors Of Hydrocarbon Distribution Of N2 Paragraph On S131 Block In The North Of The Wuerxun Depression

The s131 section of the south 2 section is north of the ulson depression,It is a key development area for steady production,The development of the seismic reflection characteristics of the seismic reflection characteristics is difficult to identify the difficulty of the fault recognition,the influence of the formation thickness of the formation thickness,the difficulty of the formation and the low size of the oil and gas distribution.The effect of the development effect of the oil reservoir must be greatly influenced,and the oil reservoir is reinforced by the geological description of the oil reservoir,the main control factor of the oil and gas distribution is found,and the technical guarantee is provided for the development adjustment.Based on the regional structure,application of the data,test oil,logging and logging,etc.according to the"multi-angle and multi-information detailed description of the reservoir",the fracture characteristics and distribution of the two sections were studied by means of well seismic,Using sedimentary cycle comparison and other methods,the study of stratigraphic comparison,sedimentary phase characteristics,reservoir characteristics and distribution characteristics of oil and water were carried out,the main control factors of oil and gas distribution are found.The main results of the acquisition are in the following areas.1.The characteristics of the broken nasal structure of the eastern side reverse positive fault and the southern side of the south side of the s131 block.apart from the relatively large fault of the east and south,The relatively small fault in the internal development of the block is approximately towards the east and west,the tectonic high is located near the intersection of the eastern fault and the south side fault;2.S131 block is dominated by fan delta,the phase of the delta is the phase of the delta,the sedimentary microfacies mainly has the microphase of the underwater shunt,the microfacies of the shunt and the half deep lake facies,the oil and gas is mainly distributed in the sedimentary facies of the underwater branch channel;3.The rock type of the south 2 reservoir rocks in s131 block is mainly terrestrial clastic rock,the structural maturity of the rock is worse,the middle and late stage of early formation,Reservoir porosity 16.26%,air permeability 51.3×10^-3?m²,f or middle hole-medium permeability reservoir;4.S131 block south 2 sand body thickness 11.6?75.2m,the northeast is thinner and the southwest is thick,the average single well of the oil layer is 7.02m,m ainly distributed in the?oil group,the longitudinal oil distribution is mainly,The oil water is below the upper oil layer,it's water below the oil,and above is oil below the dry layer,the above surface is oil and below is the oil and water distribution;5.The analysis results of the main control factors of oil and gas in the s131 block:the high part of the structure is the favorable part of the oil and gas accumulation,it is the fundamental reason that oil and gas are enriched in the south second section of northwest China the leading edge of the delta is the reservoir space for oil and gas accumulation,conducive to the accumulation of oil and gas reservoirs,good thickness and physical quality improve the concentration of oil and gas.The above research results can be applied to exploration and development,to improve the development of oil fields,p rovide basic guarantee for effective use of complex block oil reservoirs.