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Research Papers: Petroleum Engineering

Decline Curve Analysis of Fractured Horizontal Wells Through Segmented Fracture Model

[+] Author and Article Information
Jiazheng Qin, Youwei He, Yang Wang, Dong Feng, Zhonglin Yang, Dingyi Li, Haiyang Yu

State Key Laboratory of Petroleum
Resources and Prospecting,
China University of Petroleum,
Beijing 102249, China

Shiqing Cheng

State Key Laboratory of Petroleum
Resources and Prospecting,
China University of Petroleum,
Beijing 102249, China
e-mail: chengsq@cup.edu.cn

1Corresponding author.

Contributed by the Petroleum Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received March 21, 2018; final manuscript received May 27, 2018; published online July 23, 2018. Assoc. Editor: Ray (Zhenhua) Rui.

J. Energy Resour. Technol 141(1), 012903 (Jul 23, 2018) (7 pages) Paper No: JERT-18-1220; doi: 10.1115/1.4040533 History: Received March 21, 2018; Revised May 27, 2018

Nowadays, production performance evaluation of a multifractured horizontal well (MFHW) has attracted great attention. This paper presents a mathematical model of an MFHW with considering segmented fracture (SF) for better evaluation of fracture and reservoir properties. Each SF consists of two parts: fracture segment far from wellbore (FSFW) and fracture segment near to wellbore (FSNW) in segmented fracture model (SFM), which is different from fractures consists of only one segment in common fracture model (CFM). Employing the source function and Green's function, Newman's product method, Duhamel principle, Stehfest inversion algorithm, and Laplace transform, production solution of an MFHW can be obtained using SFM. Total production rate is mostly contributed from FSNW rather than FSFW in many cases; ignoring this phenomenon may lead to obvious erroneous in parameter interpretation. Thus, clear distinctions can be found between CFM and SFM on the compound type curves. By using decline curve analysis (DCA), the influences of sensitive parameters (e.g., dimensionless half-length, dimensionless production rate, conductivity, and distance between SF) on compound type curves are analyzed. The results of sensitivity analysis are benefit of parameter estimation during history matching.

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Figures

Grahic Jump Location
Fig. 1

Schematic diagram of SFM belonging to an MFHW

Grahic Jump Location
Fig. 2

Compound type curves of SFM and CFM belonging to an MFHW

Grahic Jump Location
Fig. 3

Type curves with different dimensionless half-lengths of FSNW

Grahic Jump Location
Fig. 4

Type curves with different dimensionless production rates of FSNW

Grahic Jump Location
Fig. 5

Type curves with different conductivity ratio between FSNW and FSFW

Grahic Jump Location
Fig. 6

Type curves with different dimensionless distance between SF

Grahic Jump Location
Fig. 7

Type curves with different length of horizontal wellbore

Grahic Jump Location
Fig. 8

Type curves with different number of SF

Tables

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