A New Productivity Prediction Method for Fractured Horizontal Wells in
Shale Gas Reservoirs

doi:10.11885/j.issn.1674-5086.2014.10.08.02

Abstract

Abstract:

Horizontal wells with hydraulic fracturing are going to be the main method of shale gas production. Fractured shale
gas reservoirs have a variety of seepage patterns due to lots of the natural or artificial fracture and nano-scale pore. Establishment
and solution of percolation mathematical model has a strong theoretical and practical value. Equivalent simplified three linear
flow model is constructed，which includes matrix space linear seepage with desorption and adsorption，mainly equivalent natural
fracture of fracture network space linear seepage，linear seepage within the main fracture. Under the polar coordinate space
and the Laplace space，we established mathematical models for triple seepage model，and solved them. Finally，we developed
single well productivity formula of gas reservoir and bottom hole pressure formula. By applying the established model and the
analytical solution，a fractured horizontal well productivity has be calculated. Compared with the actual production，the result
shows that analytical solution based on the model can forecast production capacity.

Key words: shale gas, seepage, horizontal well, productivity prediction, fracturing

Sang Yu1，2*, Yang Shenglai1, Guo Xiaozhe1, Cheng Hao1. A New Productivity Prediction Method for Fractured Horizontal Wells in
Shale Gas Reservoirs[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2014.10.08.02.

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