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《Journal of Shaanxi University of Science & Technology(Natural Science Edition)》 2014-02
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Flow regimes of segmented multi-cluster fractured horizontal well in ultra-low permeability reservoir

WANG Huan;LIAO Xin-wei;ZHAO Xiao-liang;LI Xiao-feng;WANG Ming;SONG Jin-xin;MOE Key Laboratory of Petroleum Engineering,China University of Petroleum(Beijing);Research Center of Sulige Gas Field,PetroChina Changqing Oilfield Company;PetroChina Changqing Oilfield Company Plant NO.3;WDEC TuHa Mud Logging and Engineering Company;  
Based on the geological and fluid proprieties of Chang-8ultra-low permeability reservoir,a single well numerical simulation model of segmented multi-cluster fractured horizontal is built by using the method of numerical simulation and the technology of equivalent local grid refinement(EQ-LGR).Application of the model,flow regimes and its affecting factors of segmented multi-cluster fractured horizontal well are studied by using numerical well test.The result shows that the segmented multi-cluster fractured horizontal well has six flow stages and shows the characteristic of double media.Whether the vertical radial flow appears depends on the size of the wellbore storage coefficient.Hump peak increases with the increase of skin factor.Flow conductivity of main fractures mainly affects the early and middle flow stages.Fracture half-length is less effect on the dimensionless pressure and pressure derivative.Permeability of simulated zone has great influence on the locations and shapes of dimensionless pressure and pressure derivative curve.The existence of stress sensitive can make the dimensionless pressure and pressure derivative curve upward,but each stage hasn′t obviously changed.
【Fund】: 国家自然科学基金项目(U1262101);; 科技部国家科技重大专项项目(2011ZX05009)
【CateGory Index】: TE348
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