River Formation Fracturing Wells And Construction Optimization Of The Parameters To Be Home Aikawa Field

With the deepening of Petroleum Exploration and Development, low permeability reservoir reserves the proportion rising year by year, low-permeability oil and gas reserves will be the main resource for increase reserves and production in China in the future for a long period of time. The characteristics of the reservoir are buried deep, high temperature, small pore throats, presence natural micro-cracks, serious heterogeneity and stress sensitivity. There is low even no production after stimulation due to the lack of knowledge of reservoir information and small production increase and even stimulations fails caused by Inappropriate stimulation parameters. Therefore, the evaluation of candidate wells and study fracturing parameter optimization is very urgent and necessary.According to Xujiahe formation of Hechuan gas filed’s geological, structural characteristics, reservoir properties analysis, showed that the main factors affecting the fracturing treatment effect are flow capacity parameters and reservoir capacity parameters. Meanwhile, according to the study on the basis of pre-stimulation well, we in-depth discussion of the treament parameters affecting the effect of fracturing treament. On this basis, the fuzzy comprehensive-hierarchy evaluation model for candidate well selection and uncertain fuzzy models for stimulation parameters optimization are established.Through the above research, we obtain the following main results and understanding:(1)Factors affecting the stimulation treatment effect include:Flow and Reservoir capacity and fracturing parameters.By univariate and gray relational comprehensive analysis, the tectonic location is the most important factor affecting gas wells’s fracturing effect, followed by reservoir lithology, porosity and gas saturation.(2) Based on fuzzy mathematics, established an analytic hierarchy system which contains base layer, feature layer and target layer and accomplished a comprehensive model to select candidate wells which contains the Analytic Hierarchy Process, Gray Correlation, Fuzzy Comprehensive Evaluation.(3) On the basis of Geological parameters include the effective thickness of the reservoir, porosity, natural gamma and Stimulation parameters include the Injection rate, front fluid volume, sand-carrying fluid volume, Proppant volume, combined with the gray relational configuration, the use of non-linear function distribution impact factor, uncertain fuzzy model was constructed for the purpose of a preferred Stimulation parameters(4) The Fuzzy Comprehensive-hierarchy well selection model and stimulation parameters optimization model was programmed by VB.Therefore, Select candidate wells and stimulation parameters can automate operations...