Research and Application of Volume Fracturing Technology in Deep Low Permeability Reservoir

The low permeability reservoir in Dagang oilfield has deep burial depth and poor physical property, and the effectiveness of waterflood development is low. In order to realize the effective development of deep low permeability reservoir and explore the transformation from traditional water drive development to the new development mode of “volume transformation + effective displacement”, it is necessary to deepen the research on the volume fracturing technology and parameters. Based on the reservoir data of the GD6X1 block and the induced stress field mathematical model, this paper compiled the stress field software to form the feasibility identification method of volumetric fracturing, and carried out the optimization of volumetric fracturing process parameters with the main contents of segment cluster perforation optimization, proppant optimization, and fluid volume and displacement optimization. The query chart of intercluster fluid intake ratio with different stress difference, different displacement and different perforation number was established to ensure uniform fluid intake of each cluster and improve the transformation effect. After the field test pressure, the daily increase of oil is 16.1 t, and the cumulative oil is 6724.89 t, which provides an important guiding significance for the volume fracturing reform of deep low permeability reservoir.