The Comprehensive Study Of Cretaceous Of Petroleum Geology In Chepaizi Area

Chepaizi area is located in the west of Junggar Basin,to the north with mountain Zaire,to the east with the hongche fault Changji sag connected by Aika southwestern tectonic belt with sikeshu sag phase,exploration area 1020km².Chepaizi area having a plurality of sets of double hydrocarbon accumulation characteristics of oil-bearing strata,currently the main exploration targets are Carboniferous and Neogene Shawan group.Recently arranged pai 611,pai 609 and other wells deployed access to industrial oil flow in the Cretaceous,show that in the middle exploration layers will be an important exploration succeed strata in Chepaizi area.Thus,the present study carried out research on these issues and made more achievement.Chepaizi Cretaceous bottom-up into Hutubi Formation?K₁h?,shengjinkou Formation?K₁s?and Lianmuqin Formation?K₁l?.Lower Cretaceous in Chepaizi projections are mainly distributed in the east side,the performance of a set of residue formation,stratigraphic features have significantly cut the top of the bottom over,there are still a large distribution area in Chepaizi area.However,the Upper Cretaceous in the east side of the projection has been substantially eroded away,essentially no distribution in the study area.Multiple Stratigraphic division and correlation for the quasi-car row sub-regions with complex ultra-stripping utilization"rock composition given cycle,time,biostratigraphy fixed home,log set bounds,wells and seismic fixed spread,"Eventually clear the residue study on Cretaceous stratigraphic division and correlation scheme,the implementation of a flat layer of cloth around the exhibition range.Cretaceous reservoirs are mainly clastic sediments,reservoir development by sedimentary facies control.First,the main Cretaceous lacustrine deposits of beach bar sand bodies is one of the main reservoirs of the Cretaceous,using single well phase,well connected phase and the well logging facies,sedimentary facies combined seismic deposit study,defined the scope of the development of beach bar sand bodies,laid the foundation for the preferred favorable reservoirs.Second,In the Cretaceous slope belt edge and near a small development of fan delta deposition,fan delta front end of large sets of glutenite,it is one of the major reservoirs in the Cretaceous.Using seismic facies and stochastic inversion technique can predict the reservoir lay the foundation for post-advantageous preferred direction.In addition,oil and gas in Chepaizi area,mainly from the Permian of Changji sag and Sikeshu Jurassic source rocks.Main factors controlling of hydrocarbon accumulation are:favorable for hydrocarbon reservoirs provide excellent conditions for the occurrence;transporting system for hydrocarbon migration has provided a guarantee.Cretaceous hydrocarbon accumulation mode is:Distant source Permian,Jurassic oil source by double faults and sand blanket conducting enrichment in favorable reservoir,rely on large sets of mudstone block accumulation.