Reservoir Prediction Technique Research Of In Sha1 And Sha2 Member Of Qingshui Subsag Of Western Sag Of Liaohe

Liaohe basin is one of the main petroleum region in China.As the development of seismic exploration,it has been more and more difficult to find structural reservoir,so the lithologic hydrocarbon reservoir has become the important exploration targets.The researched area includes Qingshui subsag and Qingdong steep slope zone,Qingshui subsag is located in the down-slope direction of Qingdong steep slope zone which is a good oil source.The sediment supply of this area is also sufficient as its east side is the central uplift.In conclusion,the researched area is advantageous for lithologic hydrocarbon reservoir developing.This article,guided by the regional geological cognition,based on high-precision sequence stratigraphy frame,combining prestack with poststack to predict lithologic hydrocarbon reservoir,use high-precision sequence stratigraphy and reservoir prediction technique to make a corresponding technical route,and get the following several aspects of the main achievements and cognition: Lacustrine transgressive system tracts in Qingshui Subsag developed fan delta deposit,submarine distributary channels and margin of channels microfacies,the most favorable sedimentary facies,is what we seeking for lithologic reservoir exploration.According to the result of reservoir thickness prediction,the first sand set effective reservoir is mainly distributed in W111 and S229 block,the second sand and third sand groups are mainly distributed in near the merchant side fault,distribution range is smaller than the first sand group.AVO fluid factor to predict oil and gas development zone.The first sand group of oil and gas are mainly distributed in the north merchant fan body S229 and W111 block,the southern have scattered,the second and third sand groups are smaller.Formed by depicting,effective reservoir sand body,lithologic reservoir spatial distribution characteristics of oil and gas prediction technology series.