Formation Damage Mechanism And Stimulation Measurement Optimization For Low-permeability Reservoir

According to the actual construction need of the well site, in view of the evaluation method to reservoir damage and the optimization executive design about stimulation of oil and water well and the forecasting methods of economic effects this paper have conducted correlated research. Based on theories which are from the mechanics of fluids in porous media and the extraction craft, the thesis has established the inflow performance relationship curve to five kinds of reservoirs, separately. Using the stable well test data, through the calculation of the skin factor, the ratio of production, the flowing efficiency, effective radius appraise the reservoir harm degree, and has carried out some experiments about the reservoir harm. According to the single well formation parameter, we have carried on the main construction parameter optimized design about the proppant of fracture, the matrix acidification, the water-injection well accent splits, and the oil well chemistry water shutoff. It is difficult to policy-maker to guarantee the measure of the economical feasibility because people evaluate the effectiveness of the most of these stimulations by the before and after well test dates. The paper use the dual return and the fitting principle to propose some computational methods about the accumulation increases oil in the validity period for all kinds of measure, so it can make a prediction about the input-output ratio and the limit of the economic output after making measure and provide the reliable rationale for the construction decision-making.By the various technical indicators calculated on the basis of research methods, it conducted the research to the oil field sub-area production increase stimulation well optimization method mathematical model, proposed a set of oil-water well stimulation of optimization and the economic analysis method. It present important guiding significance to achieve to unity between oil production and increase efficiency, educing the low efficiency measure and enhancing the production increase stimulation well investment rate of return.