Research Of Factors Of Controlling Reservoir Quality And Exploiting Dynamic On Low Permeability Sandstone Reservoir

Sandstone gas reservoirs with low permeability have complex geological characters and seepage laws. In the process of exploration and development, many kinds of information are used in geological synthesis study and determination of the exploration target areas. At the same time, many methods are used in the three-dimension distribution of the reservoir and the determination of favorable target areas. Combined with the geological characters, hierarchical dynamic tracking analysis of the productivity, pressure and reserves on layered sand body are taken place, deepening understanding of the production performance, making clear of the dynamic changes and the special production performance laws of the reservoir (or the well).In this paper, reservoir description technology and methods are used in the study of sand-shale thin interbedding of Suining formation in Luodai gas field, finding the main influencing factors of the Suining formation reservoir's quality. Further more, production performance characters are analyzed; some wells' single-well dynamic reserves are fitted and predicted using material balance method. Suining formation in Luodai gas field with low porosity—super low porosity and low permeability belongs to lake and delta front sedimentary system. Subaqueous distributary channel and debouch bar are the favorable sedimentary microfacies. Petrophysical parameters are low. The pore types of the reservoir rock are mainly intergranular pore, intergranular dissolved pores, intragrain dissolved pores, few intercrystalline micropores as well as microfractures. The reservoir is mainly small-pore and micro-throats combination, few middle-pore and small-throats combination as well as micro-pore and micro-throats combination. The main influencing factors of the Suining formation reservoir's quality are rock types, contents of the cementing matter, sedimentary microfacies, diagenic metamorphism types, development degree of the microfractures, and so on.Gas tests show that Suining formation reservoir mostly have no natural industrial...