Research On The Volcanic Rockreservoir Characteristics Of Yingyi Section In Xujiaweizi Faulting Depression Of Xingcheng Area

The essay based on synthesize analysis of core observation, thin sections identification and integration of well log and 3D seismic data,we conducted a detailed reserch in YingYi section of Xujiaweizi Faulting. Based on the long coring of Yingyi section in the Xujiaweizi area of Northern Songliao basin, and through the study of the Xushen 1 well,Xushen 1-2thwell, Xushen 1-3thwell,Xushen 1-4thwell, Xushen 6-3th well Xushen 21-1th well,do research on lithology,lithofacies,reservoir space,diagenism and reservoir quality of volcanic, at last proceed the reservoir comprehensive evaluation.The findings make known that the Yingyi section develops lava and athrogenic rock.The mainly type is generalized athrogenic rock which embody athrogenic rock, welded pyroclastic rock and alloclastic lava.The volcanic rock in this area is divided into 5 facies and 16 intrafacies.In this area permeability is lower, pore is relatively lesser, the connectedness of pore throat is bad, the aeolotropism of volcanic rock reservoir is comparatively intense. Pore,split and the composite is the main type of reservoir space. This area has 12 diagenism.The top of Xushen 1-2th is maily of compaction; condensate shrink action is mainly, then is metasomasis, dissolution, packing action, weathering in the middle; weathering is mainly in the bottom.Weathering and metasomasis action is mainly, then is dissolution, packing action,and condensate shrin in Xushen 6-3th。Pursuant to the form of classification and evaluation of the volcanic rock gas pool reservoir, the type of volcanic rock reservoir is divided into 3, the reservoir type of subject reservoir in the area isⅢ. Hope the research can offer the theory supports for the further exploration and development of Xushen gas field.