The Research On Geology Model Building Of Chang6Reservoir Of YNW Area In The East Of Shanbei Slope

Chang6reservoir of YNW area in the east of Shanbei slope is a typical low porosity and low permeability reservoir. In order to better reveal the geological features of the reserch area and forecast the space distribution of the sand bodies and the distributed regularity of the residual oil, this paper carries out the study on three-dimensional geological modeling.In this paper, YNW area in the east of Shanbei slope of Ordos Basin is seen as the research abject and Chang6stratum of Yanchang formulation is seen as the interval of interest. Firstly, the general situation of geology and deposition of the research area is analyzed. Secondly, based on the geological data, core data and logging data, stratigraphic division and correlation is studied and precise stratigraphic frame of the research area is built, and then mini-structure characteristics of the top of small layers is researched; the evolution features of the sedimentary facies is analyzed, and the result shows that there are similarity, difference and inheritance among the sedimentary facies of Chang6small layers of the research area. Following the principle of geology conditions restricting logging and core scaling logging, the relevance of lithological property, physical property, electrical property and hydrocarbon property is an alyzed, and the logging interpretation model of reservoir parameters is established, and then static database of reservoir parameters is got and the plane distribution features of reservoir parameters is described; based on core data and logging data, reservoir heterogeneity is studied, and the characteristics of reservoir heterogeneity is depicted qualitatively and quantitatively; under the direction of the theories as sedimentology, lithostratigraphy and geological statistics, and so on, three-dimensional geological modeling of the YNW area is studied by Petre12004, and the structure modeling, facies modeling, porosity modeling, permeability modeling and oil saturation modeling of Chang6reservoir of YNW area is built by sequential gaussian simulation method, and the three-dimensional geological modeling characteristics of the structure, sedimentary and property of the reservoir is precisely described, and the simulation results consistent with geologic cognitions.These research results provide significant basis for the development of the next production plan of this area. Besides, the relevant research methods are applicable to the similar geological research.