The Study On The Reservior Physical Characteristic And Its Geological Modeling Of Upper Paleozoic In Tabamiao Area In The North Of Ordos Basin

Reservoir Modeling is a kind of geological model. Bsasing on geology and geophysical information, making the best of the known reservior information, the model can analyses reservoir and its internal structure elaborately, reveal oil and gas distribution rule, describe oil and gas distribution status and flow characteristic. Also, the model can establishes porosity and permeability distribution pattern in three dimensional space.In Tabamiao Area, basing on the research result of sedimentary system and microfacies, according to statistic geometric parameter of channel and sand, using river channel system modelding technology provided by RMS, sedimentary facies model is obtained and some microfacies(channel, channel bar, point bar, flood fan, interchannel area) distribution patterns are completed. In control of facies-controlled model, porosity and permeability modeling work prodeeds. The concrete work is as follows:(1) the distribution characteristic of microfacies and sandBasing on the core, logging and testing information, combining the research result of regin sedimentary system, the sedimentary facy of research area is determined. According to lithological change, bedding type, integrating morphological characteristics of well logging, the sedimentary microfacies type is determined. The different target stratums have different sand types and they have their own spread characteristic.(2) reservoir characteristic and evaluation researchLithologic characteristic and physical characteristic of different horizon in Tabamiao Area are analysed and summarized in the aspect of sedimentology characteristic, lithologic characteristic, diagenesis, reservoir physical property and pore structure. Dimensionless number [Φ·K·Rio/10-1μm3] is adopted to evaluate the reservoir.(3) four characters of reservoir and reservoir characteristicBy studying four characters of reservoir(lithology, electric property, capability of bearing oil and gas, physical property), studyding area and adjacent region are compared in the aspect of sedimentology characteristic, lithologic characteristic, reservoir physical property, pore structure, Sg, pressure coefficient and AOF.(4) reservoir modeling and result evaluationBased on the research achievement of sedementary system and microfacies, according to statistic geometric parameter of channel and sand, using river channel system modelding technology provided by RMS, sedimentary facies model is obtained and some microfacies(channel, channel bar, point bar, flood fan, interchannel area) distribution patterns are completed. In control of facies-controlled model, porosity and permeability modeling work prodeeds and numerical model is completed.By the research and using of these method, the sedimentary base type is determined, the distribution of various microfacies types are simulated, the models of porosity and permeaility are done, numerical model of reservoir is completed. The compared research work is carried out and this work has vey important value to the productivity of gas well in Tabamiao area. Also, it provides significant technology supply to single well productivity growth, natural gas exploration benefit increasing, reserve scale enlarging in the north Ordos Basin of SINOPEC.