Research Of Volcanic Rock Reservoir Evaluation And Accumulation Rule In K301 Region Of Zhungarica Basin

K301 of blocks located at Kelamayi City southeast about 31 km, constructs the position to belong to the Zhungeer Basin in the northwestern margin Zhongguai uplift the southeast end of the dumping, in November 1999 deployed the K301 well in the test group Jia-Mu River to obtain the unimpeded current capacity 90,700 cubic meters of industrial air and thus had discovered the gas reservoir, Currently, production is mad 15,400 cubic meters at present. The core analysis indicated that the K301 well reservoir mainly for the andesite and the tuffaceous angle gravel lava, reservoir thickness is 33m, the natural revelation for low porosity,low permeability of the reservoir, the average porosity is 10.87%, mean permeability for 1.35×10^-3μm². The K301 well drilling successful inspiration, in an its neighbor drilling's K101 well, a K102 well is obtained afterward good in the Jia-Mu river group showings, but located at the declinator direction's JL2 wells, drilled similarly has met a set of 18m thick dacite, the showings were bad, hence, this sub-area's exploration step entered the Stagnation.In order to break the K301 present this kind of deadlock, this article attempts from many kinds of angles to carry on the analysis, the research, discovers has this kind of difference reason, is the structure, the lithological character, the stratum pinch-out or the reservoir natural influence?Material which grasp through the comprehensive investigation and study and the generalized analysis, understood the K301 has the stratum not unified problem with the periphery sub-area, particularly three pack of departments and the permian department, is more chaotic, the application sequence stratigraphy's theory, to studied the area and the neighbouring area has carried on the sequence stratum division, also refers to symbolizes and so on which based on the fine Jia-mu river group deposition time's region environment of deposition and the tectonic movement, each kind brought, drilled to the area to the Jia-mu river group's 4 wells has carried on the single well division; In the fine structure explanation's foundation, understands in the research area, between the late permian series stratum, various formations, the formation not the conformity contact surface in area growth situation, has laid certain foundation for the following oil deposit rule research. At the same time refers to oil fields of Daqing.and Jidong etc. to get a light from another light the precipice recognition some success technology, exploring to studied in the area the volcano rock mass to carry on the recognition, tracing, in the advantageous target area, altogether distinguished traced 4 volcano rock masses, area 216.6km², including the K101, K301, K102 wells to confirm that produced the oil gas the volcano rock mass, has carried out its growth scale and the distribution range. Finally this article refers to the predecessor to the northwest margin area understanding achievement and some comprehensive analysis, the judgment, and unified each achievement which did for this research institute to study the area the oil gas to carry on a more systematic analysis: From the source bed, the reservoir to the cap rock and the reservoir migration pattern, the reservoir distribution rule, reservoir formation mode, reservoir type etc to carry on the analysis, has obtained the research area reservoir type mainly for the structure control background under stratum - lithologic deposit, the master of reservoir formation control factor is for the structure, the cap rock, not the conformity contact surface growth and the trap situation. According to the generalized analysis result, the article had determined finally the Jia-mu river group in studies in the area the advantageous target area located at work area northeast structure pitch belt.