Research On The Volcanic Rock Reservoir Characteristics Of Yingyi Section In Xushen 1^th Well Area

The essay based on the long coring of Yingyi section in the Xujiaweizi area of Songliao basin, analyse the characteristic of the volcanic lithology,volcanic facies,reservoir space,diagenism of the subject reservoir and the physical property through the observation and description of drill core, lens-observation of core flake, and study of geophysical exploration and log information of Yingyi section of the Xushen 1-2th,Xushen 1-3th,Xushen 1-4th,in Xushen 1th well Area, at last proceed the reservoir comprehensive evaluation.Hope the research can offer the theory supports for the further exploration and development of Xushen gas field.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.The mainly pore type in Xushen 1-2th and Xushen 1-4th is devitrification microbore, intergranular corroded hollow, then is debris intragranular corroded hollow, at last is matrices corroded hollow, tectonic split and so on.The mainly pore type in Xushen 1-3th is air hole, amygdaloidal relic pore, devitrification microbore, then is matrices corroded hollow, intergranular corroded hollow.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.Condensate shrink action is mainly, then is metasomasis, dissolution, packing action, weathering in Xushen 1-3th.Metasomasis is mainly, then is compaction and packing action.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.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 isâ…¢.