The Formation Genesis Study And Controlling Factors Analyzing Of Low Porosity, Low Permeability Sand Reservoir, DaNiuDi Gas Fields In Ordos Basin

Continental low permeability oil gas reservoir accounts for a rather high proportion of domestic oil gas reservoir. However, there has been not yet a suit of perfect theoretics and techniques about how to exploit the low permeability oil gas reservoir at present. Daniudi Gas Fields in Ordos basin is the typical marine-continental low permeability reservoir, of which the geological properties is not very clear. Base on the recent sedimentology, high resolution sequence stratigraphy and reservoir geology, combinated with the region geological condition, the dissertation finely descripts the characteristic of deposition, diagenesis and physical property for the Daniudi gas fields in Ordos basin, and according to data of cores, outcrop, logging and chemical examination. we explicit the characteristics of plane distribution, profile morphology of main sand reservoirs in the three deposition system and conduct contrast analyzing of physical property for the interest formatin. And analyze the main factors of influence for low permeability oil gas reservoir and the occurence of high-quality reservoirs in study area. The dissertation also synthetically evaluates the main segments based on that analysis and the optimal classification parameter of low permeability reservoir.