Fine Description Of Reservoir In Block Huan 2-16-304 Of Liaohe Oilfield

This paper divides Dalinghe reservoir of Block Huan 2-16-304 into 2 middle-term sequences by using the high resolution sequence stratigraphy theory,and identifies 3 sandstone groups which named Daâ…¡₁,Daâ…¡₂ and Daâ…¡₃ and 6 small layers which named Daâ…¡₁₁,Daâ…¡₁₂,Daâ…¡₂₁,Daâ…¡₂₂,Daâ…¡₃₁ and Daâ…¡₃₂.Sedimentary geology analysis shows that turbiditic fan develops in study area, which is further divided into braided channel,interbraided channel and channel front. Braided channel mainly develops in Daâ…¡₃,whose lithology is glutinite,while the lithology of Daâ…¡₂ are sandstone interbedded occasionally with mudstone,and mudstone mainly deposits in Daâ…¡₁ which formed in the lake environment.Middle fan is the main depositional type and braided channel is the main reservoir.The study of oil distribution shows that the oil pools which develop along the north to the south are controlled by the fault in study area,and with abundant oil, where is the key developing area.Oil distribution along the east to the west changes discontinuously and is mainly controlled by lithology.In vertical,Daâ…¡₁ and and Daâ…¡₂ are oil layers,Daâ…¡₃₁ and Daâ…¡₃₂ are water layers.As the influence of terrain in study area,the boundary of oil and water becomes deep from northwest to southeast. At the end,four types of favorable oil areas are identified.On the basis of analysis of logging and seismics,this paper founds geology models and numerical simulation,and discusses the remaining oil distribution in study area.The results show that the remaining oil distributes mostly in the northwest and north of study area,faults and tectonics are the main controlling factors.The remaining oil is accumulated at the high place and beside the faults where are the key exploration areas in the future.