Sichuan Basin Identified.and The Sichuan~Diversity Must Be Home River Group Structure-Sedimentary Characteristics Analysis And Reservoiring Evaluation

This study is the main objective, comprehensive geological seismic data fromregional tectonic background and tectonic evolution of the zone shall of thesedimentary environment of the home and sedimentary facies, using continentalstratigraphic sequence stratigraphy and "phased theory" and other advancedgeological and petroleum geological theory must be home, clear of the sedimentaryfacies exhibition cloth and favorable facies belt distribution, the controlling factorscalled hidden. Through the xujiahe exploration situation analysis, thought theinfluence of reservoir property of many factors, sedimentation is a foundation, at themacro control the distribution of reservoir, diagenesis is the key, it finally decided thestand or fall of reservoir property, the tectonic setting is the important condition ofreservoir high yield. As for petrophysical property, constructive diagenesis mainlydissolition and tectonic burst, leading to the role of porosity increases; The destructivediagenesis mainly compaction effect, pressure dissolve function and cementation,causing the porosity of lower; Metasomatism effects on the porosity have littleinfluence. Based on the knowledge are analyzed in detail, this research shall be thehome of the reservoir type and the controlling factor of sedimentary environment, andpoints out that the favorable and later favorable diagenetic reservoir developmentsecondary role is the main controlling factors, delta distributary channel, ZhuHeDaodistrict, primitive sedimentary sand body phy-sical best; Ancient slope backgrounddifferences compaction effect can generate lots of tiny cracks, greatly increase thepetrophysical property. This must be home for oil and gas exploration emphasis of thedirectional significance. Meanwhile, through to the zone HBC, AY-TX-WD, gas oroil and gas LNS etc shall be home river reservoir structure of the anatomy of thegroup must be home and hydrocarbon accumulation in the analysis of enrichmentperiod shall be home area of the thermal evolution hydrocarbon source rocks,reservoir porosity evolution and development of structure traps shall be established inthis area, home of the accumulation model, finally, to the sichuan~identified.and thereservoir shall be of the transitional home a comprehensive evaluation: It is considered that the reservoir shall be home river group match soure-reservior-roof isgood, must be home mainly for each of the reservoir type gas since birth,self-generated hydrocarbon source rocks from the thermal evolution since birth peakoil and gas into the cretaceous until now still at birth peak late hydrocarbon highmature early stage, must be home with ancient tectonic evolution of the hydrocarbonsource rocks better match thermal evolution; Zone shall be two segment and shallDuanYouXiao reservoir are four proudest development, must effectively reservoirdistribution is relatively limited; Must be home river group must three, five and pearlmust be blunt group and overlying the Jurassic formation is must home river groupmust be two, four, the proudest gas directly and indirectly cover layer cover layerthickness, cover, plus zone, gas reservoir development are relatively fracture goodpreservation condition. From the exploration situation is not difficult to find the upperTriassic must home river group has large petroleum features, exploration prospect.