The Reservoir Beds Sedimentology Research Of The Second And Third Part Of PingDiquan Formation Of Middle Dyas Series In Wucaiwan-Shishugou Region In The Eastern Junggar Basin

Directed by the advance theories of sequence stratigraphy,reservoir beds sedimentology, seismic stratigraphy and petro-geology,measured by exactitude seismic procession,analysis of seismic facies, analysis of single well lithfacies and sedimentary facies,study of macro and micro character of reservoir and diagenesis, this paper study comprehensively the stratigraphy sequence,the type and distributiong of sedimentary facies,reservoir properties, the diagenesis and the evolution of pores of the 2nd and 3rd parts of PingDiquan formation of Permian in WuCaiwan-ShiShugou Region in Jungan basin. We can optimum seek favourable target area and apply the study results on oil field production in order to solve the difficult questions. We mainly achieve several views as follows:l)Establish the sedimential sequence framework of Permian formation in studying area and delimint the JiangJunmiao formation of Middle Dyas series as Lowstand System Tract, the lower of the second part to the third part of PingDiquan formation of Middle Dyas series as Transgressive System Tract, the upper of the second part to the first part of PingDiquan formation as Highstand System Tract. Lowstand System Tract, Transgressive System Tract and Highstand System Tract are all have characteristic of changing gradually in tune and space. It's the new theory of sequence stratigraphy applying on the continental sedimentary basin.2)It is the first time that we point out there are two source area in exit, KaLaMeili Mountain in the North and QiTai Palao-Uplift hi the south. 3)The PingDiquan formation mainly are the deposition of lake and fan-delta, fan-delta developing in the background of the lake facies sedimentary.4)The main reservoir of studying region is low pority , low peremeability litharenite and feldspar litharenite with the character of the low component maiturity and middle textural maturity.Mostly the reservoir space is secondary pore. The physical properties are mainly dominated by thress factors:solution,sedimentary facies and buried depth. The study of diagenesis and its stages let us think that the PingDiquan formation belongs to Period "A" of Early Diagenesis.5)The best exploration area of reservoir prospecting is the region locating on the north of well-Huo No. 14 block. By the accurate structural interpreting we have found a trap deploymented a exploratory well hi it------North Fault Block of well-HuoNo.14.Applicating all kinds of new theories,this research has undergoed die mesningful exploration of the sequence, sedimentary facies, reservoir properties and the evolution of pores of the PingDiquan formation of Permian. And the syudying effects can direct our work in fact well.