Study On Sedimentary Facies From Upper Jurassic Series To Lower Cretaceous Series Of The Suibin Depression Of Sanjiang Area In Northeast China

Sanjiang area in northeast China is one of the marine-terrigenous facies oil-gas bearing basin of Mesozoic in China. So it is important to study the sedimentation of Sanjiang basin of Mesozoic in northeast China. The sedimentary facies and resvervoir characters of Dongrong Formation , Chengzihe Formation and sedimentation of Muling Formation were discussed in the article.Field outcrop observation appearing , area earthquake section having applied study of high resolution tier of order stratum , study of reservoir sedimentation principle and relevance discipline theory knowledge, and comprehensive utilization such as study of earthquake stratum and study of well logging stratum explain the main body of a book , basis data such as core and well logging carries out to study. The characteristic,sedimentation having studied purpose tier of Member order growth look at and appraise the space exhibition spreading and hanging down to evolution , the thing source direction , build purpose tier of Member sedimentation filling the synthetical pattern, the pattern has had the preliminary cognition finally each other to what be studied sedimentation. The deposition centre is located in the northwest part and the southwest part by the northwest part and southwest part studying the thing source direction thinking that Sanjiang basin Suibin depression studies scheduled time comes from a col mainly getting bogged down; Judging from mudstone thickness picture, significant migration happened in the sedimentation centre. Sedimentation environment aspect, Dongrong Formation period deposits giving first place to marine deposit each other , north part and southwest getting bogged down in col direction is that sea and ground transition scatters each other , is that fan dalta , the delta deposit mainly. There is continental deposit in fore-end , be that the alluvial fan deposits in fan dalta, that the mudstone distributes area is relatively relatively poor than broad and having certain thickness , the transverse direction stability, Both Chengzihe Formation later stage and Muling Formation give first place to lake facies or swamp facies sedimentation. The delta and the lake look at and appraise sedimentation location significant change happened, having succession in two periods. Array studying early Cretaceous period of late area Jurassic period - is that a set of marine regression deposits on the world , the entirety. The late Jurassic period basin and the southern part area such as Hulin, Jixi, Bobi, Shuangyashan have formed the offshore waters basin. Sui Bindepression has given first place to littoral or shallow sea environment , has deposited marine facies mudstone delta and fan dalta having developed with thin sandstone m.In the last Jurassic, sea level is big with the whole world the range coming down ,area inner seawater all withdraw from, the clastic rock having started this area entrance containing coal with the continental facies Formation having ended this one area marine deposit stage , early Cretaceous period give first place to sedimentation period.On sedimentary facies studying, picture making use of the sedimentation parameter (to contain sand coarse aggregate ratio isopleth map , sandstone isopach map) , oil reservoir inversion(trace integration of constrainen by well), tradition of oil reservoir physical property by simulation,carrying out the synthetical forecast from late Jurassic period to early Cretaceous period of of Sanjiang basin Subin depression. By that a synthetical study thinks, helps reservoir positions and helps sedimentary facies of Suibin depression mainly scatter fault and anticline'structural nose of in the southern part Xingan cutting off the tilted tectonic zone of back and the north part nose shape tectonic zone.