The Research On Yingyi Section Volcanic Rock Facies In Xingcheng Area Of Songliao Basin

The essay basing on volcanic rock genesis mechanism proceed multidisciplinary analysis in Xingcheng gas field of Xujiaweizi area by using of optical identify,core observation and description, log interpretation and so on. We also have completed classification and denomination of volcanic rock,description of petrology characters,the research on volcanic rock's distribution characters.we proceed individual well facies analysis, stratigraphic classification and comparison, data multidisciplinary analysis of both physics of the Earth and geology and accomplished the research of volcanic rock facies'character, volcanic rock eruption model, volcanic rock facies model.we choice beneficial facies area associating with well testing and try to offer the theory supports for the exploration and development of Xingcheng gas field.The essay got this outcome:1 classification and denomination of volcanic rock:Yingyi section's rock mainly is acidity volcanic rock: in this area, neutral volcanic rock is secondely.the mainly lithology are: rhyolite, dacite, auto brecciated lava, volcanic tuff, alloying tuff, alloying brecciate.2 The volcanic rock eruption cycle division for Yingyi section in this area,it's divided into three eruption cycle.3 Volcanic eruption model is crack----central eruption in Xujiaweizi area, central eruption is mainly,crack eruption is secondely.4 There are mainly 5 kinds of facies in this area: volcanic channel facies, flushout facies, eruption facies, overflow facies,volcanic sedimentary facies.it divided into 4 facies area from volcanic mouth horizontally: volcanic channel- flushout phase field, eruption phase field, overflow phase field, volcanic sedimentary phase field.it's vertical contact relationship is: eruption facies in the bottom,overflow facies in the top.5 rock facies is one of the most important factors controlling reservoir's development.different facies having different physical property is the reason why the different production in a well. Channel facies'physical property is the best,eruption facies and overflow facies are secondely.