Pressure-Transient Performances of Fractured Horizontal Wells in the Compartmentalized Heterogeneous Unconventional Reservoirs

Dongyan Fan, Hai Sun, Jun Yao, Hui Zeng, Xia Yan and Zhixue Sun
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Dongyan Fan: School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China
Hai Sun: School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China
Jun Yao: School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China
Hui Zeng: The No.1 Gas Production Plant, Sinopec Southwest Oil and Gas Company, Deyang 618000, China
Xia Yan: School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China
Zhixue Sun: School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China

Energies, 2020, vol. 13, issue 19, 1-15

Abstract: In order to investigate pressure performance of multiple fractured horizontal wells (MFHWs) penetrating heterogeneous unconventional reservoir and avoid the high computational cost of numerical simulation, a semi-analytical model for MFHWs combining Green function solution and boundary element method has been obtained, where the reservoir is divided into different homogeneous substructures and coupled at interface boundaries by plane source function in a closed rectangular parallelepiped. Hydraulic fractures are assumed uniform flux and dual porosity model is used for natural fractures system. Then the model is validated by compared with analytical solution of MFHWs in a homogeneous reservoir and trilinear flow model, which shows that this model can achieve high accuracy even with a small interface discretization number, and it can consider the radial flow around each hydraulic fractures. Finally, the pressure responses with heterogeneous parameters of reservoirs are discussed including heterogeneous permeability, non-uniform block-length and fracture half-length distribution as well as dual porosity parameters like elastic storage ratio and crossflow ratio.

Keywords: multiple fractured horizontal well; Green function; semi-analytical solution; unconventional reservoir (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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