Research On Productivity Evaluation And Water Distinguish After Fracturing In Fuyang Reservoir Of SZ Block

Three Zhaoqing Fuyang reservoir in the middle of Songliao Basin, is a low permeability reservoir, the physical property of low permeability reservoir is poor, in low permeability oilfield,the need for artificial transformation of its production by fracturing stimulation measures. Fracturing is the common reform measure in low permeability reservoir. It is very necessary for the development of low permeability oilfield.According to the geological characteristics of three Zhaoqing Fuyang reservoir,and seepage mechanics theory, the Medium radial flow formula of unstable seepage flow in vertical fracture wells with finite conductivity and the Late quasi steady flow formula are conducted, and then gives the Dupuit yield formula, yield prediction and analysis hydraulic fracturing reservoir engineering design method; established fracturing fluid flow back model, mainly using the theory of mathematical model of fluid mechanics and numerical simulation, the principle of material balance on the back of fracturing fluid during the process of the crack closure row built by flow back.Give back row fracturing fluid numerical solution of mathematical model, and a computer program is compiled according to the variation of the bottom or the wellhead pressure calculation and experimental investigation of crack closure of Fang Yanxin flow in the process of verification and improvement of the selected model; the effects of fracturing fluid properties on fracturing and fracturing construction is evaluated. According to the characteristics of fracturing fluid and the performance of the effect of fracturing effect, the performance of fracturing fluid fracturing effect of fracturing fluid properties and influence of reservoir, sand permeability, and combined with the actual situation of three Zhao Fuyang are analyzed. Through the analysis of laboratory of fracturing fluid performance from the field data and the actual situation of production and the characteristics and features of high yield curve, middle and low layer, a variety of methods and materials are combined, through comprehensive analysis, the reservoir capacity can be forecasted. To determine the formation of produced liquid is formation water or foreign fracturing fluid, after fracturing,water analysis is carried out in three Zhao Fuyang, through the research on the classification of formation water and water theory, the practical methods of water discrimination for three Zhao Fuyang reservoir area are summed up, and are brought to the site the data of water judgment.