Hydraulic Fracturing Of Low Permeability Reservoir Numerical Simulation Research And Application

With the continuous development and exploitation of low permeability reservoirs at home and abroad, hydraulic fracturing hasbecome stimulation and augmented injectionmeasures in low permeability reservoirs. Especially in the current economic benefits as the center of low permeability reservoirs, it’s the more importance toforecastproduction performance afterhydraulic fracturing. With the continuous development of numerical simulation technology, the reasonable and effective numerical simulation can help reservoir engineers know low permeability reservoir development effect after hydraulic fracturing, a more accurate understanding the oil and water distribution in low permeability reservoir after fracturing, a more economical reasonable to provide theoretical guidanceforthelow permeability reservoirexploitation.With the numerical simulation method of low permeability reservoir hydraulic fracturing well as the research target, based on researching at home and abroadonthedevelopmentof hydraulic fracturing and hydraulic fracturing numerical simulation technology of low permeability reservoirs, this paper summarizes and analyzes several methods for hydraulic fracturing numerical simulation to provide the theory basis.On the basis ofthis study, the number ofsimulation softwareEclipseas a platformto set up mechanism model of different hydraulic fracturing simulation method, after considering various factors.and select the hydraulic fracturing the simulation method to suit more injection-to-production-well of low-permeability reservoir. The main factors of influencing the productivity, which include fracture half length, fracture width, fracture conductivity, water saturation, formation permeability and so on, were analyzed systematically by using the preferred method, analyzes the influence ofthe error ofthe preferred method in different parameters,and an instance ofthe application. Mainly includes the following research results:(1) Systematic summary and introduces the hydraulic fracturing simulation method, from two aspects of hydraulic fracturing explicit and implicit demonstrated the processing method of hydraulic fracturing numerical simulation to provide the theory basis for hydraulic fracturing numerical simulation.(2) Set up the mechanism model ofthe different hydraulic fracturing simulation method, analyzes the production performance of reservoir and main lateral wells with the different method to simulate the hydraulic fracturing, and analyzes the breakthrough time and oil and water movement rules of main lateral wells from the two aspects of the plane and longitudinal.(3) Considering the effect of different method simulation, the reliability of simulation method, convenience of operation, operation time, low permeability reservoir injection-to-productionwell and so on, and comparative analysis of thesimulation resultsofdifferenttreatmentmethods.(4)Based on the mechanism research, set up the production performance forecasting model of optimization method and the PEBI grid refinement with the different production factors, and compared the two methods effect on production performance and error analysis. (5) Combined with Bai MaNan reservoir as an example, the preferredmethodusedinhydraulic fracturingofthesimulationunit andwork area,simulation resultsare much better, and select the best programs of work area.