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《Petroleum Exploration and Development》 2007-04
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Factors affecting production capacity of fractured horizontal wells

ZENG Fan-hui1,GUO Jian-chun1,XU Yan-bo2,ZHAO Jin-zhou1(1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;2.Exploration & Production Research Institute,Sinopec,Beijing 100083,China)  
Multi-fractures are created when a horizontal well is fractured.Due to the stress difference along the well and the restriction in fracturing technology,the factures are different in length,conductivity,azimuth angle etc.Moreover,during production,the fractures' mutual interference makes the productivity prediction more difficult.The paper combines the shape of fractures and the fluid percolation mechanism to present a new model,and analyzes the factors affecting the productivity.As the number,length and conductivity of fractures increase,the production increase;the larger the angle between fractures and horizontal wells,the higher the production rate.With respect to different fractural layout,it is necessary to place the fractures stagger,leading to the distance among the outer fractures smaller than that among the inner fractures.Because of fracture's mutual interference,different fractures have different production rates with the production of the innermost fractures being the lowest.
【Fund】: 油气藏地质及开发工程国家重点实验室基金项目“复杂油气藏压裂酸化基础理论研究”(PLN9746);; 西南石油大学创新基金项目“水平井分级压裂优化设计技术研究及软件研制”(CXJJ27067)
【CateGory Index】: TE328
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