Daniudi Gas Field Low Porosity And Low Permeability Gas Reservoirs And Gas-bearing Reservoir Evaluation And Prediction

Research results in the previous papers on the basis of the field for Daniudi dense - low-permeability sandstone reservoirs, lithologic traps, natural and low production capacity in order to study the basis of sedimentary facies to a combination of Geology and Geophysics for basic ideas, the use of a number of digital processing and evaluation of wells, reservoir prediction of seismic attributes, waveform analysis of differences in gas and other key technologies in order to H3, S1, the primary purpose of layer Daniudi Gas Field to a gas reservoir description and prediction of gas to resolve the Daniudi Gas Field gas reservoir with low porosity and low permeability of the fast and efficient development for the realization of a fundamental "multi-drill high-yield wells, fewer low-yield wells and ineffective drilling well, do not drill well come to nothing," the strategic thinking provided sufficient basis for the theoretical foundation and development.In the region through the sedimentary facies and reservoir characteristics of the analysis cover the use of methods such as seismic attributes to predict reservoir and the use of waveform difference method for gas-bearing reservoir prediction thesis made the following main results: ( 1) The high-resolution sequence stratigraphy study, contrast and reservoir delineation of the fine based on the study area to identify the type of reservoir structure and sandbody spatial distribution, the continuity of sand bodies. (2) The standardization of the entire field based on the logging data, through digital processing and multi-well evaluation of the study area to determine accurate reservoir lithology, physical properties, gas parameters, improved the accuracy of the interpretation of the reservoir in order to based on an evaluation of the reservoir. (3) In the log phase and study the basis of sedimentary facies to sedimentary facies study of a single well for the bound, combined with sedimentary characteristics parameters, produced a small layer of the sedimentary facies distribution. (4) Described the geological features of the cover and the quality of the evaluation of the quality and cover to explore the inherent relationship between the high-yield wells. The study: control of natural gas cap is an important factor accumulation, at the bottom of P2s large mudstone caprock thickness, continuity, and closure of a good performance is Daniudi Gas Field accumulation of critical control factors. (5) Differences in the use of waveform analysis of the sensitivity of the parameters of gas-bearing inversion and forecasts, and achieved a higher accuracy of the forecast results for the lower part of the deployment of wells, the development of programming to provide a reference. Research results will be fully used in actual production, and achieved satisfactory results.