Study On Geological Characteristics Of Reservoir Development In Shen 67 Block

In the process of oilfield exploitation,the concentration of remaining oil distribution is decreasing,so it is necessary to describe the reservoir more precisely.Based on the results of previous research,this study makes a description of the structure,deposition and reservoir of Shen 67 block by comprehensive application of seismic,logging and analysis data.The results of this study will provide a support for the development of Shen 67 block reservoir.Based on the regional structure,this study on the distribution of oil and gas water control factors,with the symbol layer as the control,combined with sedimentary cycle,lithology,electricity,hydrocarbon-bearing characteristics,as well as source direction,sand development direction and lithology,thickness distribution of the layer group to expand the comparison.On the basis of phase control,the comparison between the time and the body is emphasized,and on the basis of stratigraphic contrast,to carry out the study of structure,deposition,reservoir and reservoir distribution,the following conclusions are obtained:Shen 67 block structure is relatively simple,it belongs to the south-east tilting single oblique,from west to east,stratum height continuously reduce,stratum dip not exceeding 7°⁹°.The tectonic highs and amplitudes are 1600 m and 340 m respectively.The target block is developed in the front delta,Delta front,Delta Plain.The bottom of the sand is a dark lake mudstone,the upper distribution of large sets of thin layer of sandstone and mudstone mutual layer,the most upper with gray green,purple mudstone,etc.mainly.The physical property of reservoir in S₃² section of Shen 67 block is general,the average porosity of composite material is 21.8%,the permeability mean is 490.8×10^-3mm ²,which belongs to middle porosity and middle permeability reservoir.Shen 67 Block Vertical reservoir buried deep 1200¹950m,single well average effective thickness of 25.6m.The reservoir is mainly concentrated in the?and?.On the plane,the reservoir distribution is controlled by structure and lithology.It is mainly distributed in the central and western region of Shen 67 block,but the reservoir thickness changes greatly and is affected by the distribution of sedimentary sand body,the thickness of the reservoir is gradually thinning from north to south,and the whole area is 20⁴0m.Shen 67's oil is of good quality,and density,viscosity,freezing point are at a low level.The petroleum geology reserves of Shen 67 block S₃² section are 15.977 million tons.