The Research Of Tight Sandstone Gas Reservoir Prediction Method For Jishen1Area

The lithologic reservoirs is becoming more and more important in the energyexploration and development field, and the amount of resources in tight gas-bearingsandstone reservoirs is considerably rich. Shuixigou Group in Winba-Jishen1aera,which loacated in the southern slopes of the Turpan Basin is typical tight gas-bearingsandstone reservoirs, The well logging of the terrestrial formations displayedabundant oil-gas, so we predict that there are large areas of oil and gas may. Earlierstudies of the target layer is relatively small, and the understanding is not clear enough.Expanding the region of tight gas sandstone reservoir prediction technology, can be agood guide further exploration and development.On the basis of full understanding of the regional overview and geologicalfeatures of the region, we finely describe the structure of the region. We selected theappropriate seismic wavelet, based on Logging understanding, and completed horizoncalibration, with the help of the contrast between synthetic seismogram and near-wellseismic traces. Then well combined well tie geologic layer profile, and analyzedbackbone profile characteristics to determine the program of horizon interpretationand explain the target horizons. At the same time, we used ant tracking algorithm toexplain the fracture system automatically. At last, we drew structural map of the targethorizons.Based on Fine horizon and fault system interpretation, we used well constrainedsparse spike inversion and geo-statistical inversion method, analyzed and comparedthe result of both to predict the morphology of the various horizon of sands. Next，weextract seismic attributes, choose good attributes to predict reservoir porosity,combined with well point parameter information.What’s more, we use the method of frequency-division interpretation.high-frequency seismic data can help improve the accuracy of the horizoninterpretation and explanation of the fault system, and divided amplitude slice also verify the correctness of the interpretation of the sand body distribution via inversion.In summary, using ant tracking, spectral imaging, inversion, attribute analysistechnology, we analysis the structural shape of the area and the reservoir distributionto provide a basis for the exploration and development of the next.