A multi-linear transient pressure model for multistage fractured horizontal well in tight oil reservoirs with considering threshold pressure gradient and stress sensitivity

2019 ◽  
Vol 172 ◽  
pp. 839-854 ◽  
Author(s):  
Zhongwei Wu ◽  
Chuanzhi Cui ◽  
Guangzhong Lv ◽  
Shaoxian Bing ◽  
Gang Cao
Keyword(s):  
Pressure Gradient ◽  
Horizontal Well ◽  
Stress Sensitivity ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Threshold Pressure ◽  
Transient Pressure ◽  
Threshold Pressure Gradient ◽  
Fractured Horizontal Well ◽  
Tight Oil Reservoirs

Fractured horizontal well productivity prediction in tight oil reservoirs

2017 ◽  
Vol 151 ◽  
pp. 159-168 ◽  
Author(s):  
Jinghong Hu ◽  
Chong Zhang ◽  
Zhenhua Rui ◽  
Yanlong Yu ◽  
Zhangxin Chen
Keyword(s):  
Horizontal Well ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Well Productivity ◽  
Fractured Horizontal Well ◽  
Tight Oil Reservoirs ◽  
Productivity Prediction

scholarly journals Rate Transient Analysis for Multistage Fractured Horizontal Well in Tight Oil Reservoirs considering Stimulated Reservoir Volume

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Ruizhong Jiang ◽  
Jianchun Xu ◽  
Zhaobo Sun ◽  
Chaohua Guo ◽  
Yulong Zhao
Keyword(s):  
Transient Analysis ◽  
Horizontal Well ◽  
Superposition Principle ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Stimulated Reservoir Volume ◽  
Reservoir Volume ◽  
Rate Transient Analysis ◽  
Fractured Horizontal Well ◽  
Tight Oil Reservoirs

A mathematical model of multistage fractured horizontal well (MsFHW) considering stimulated reservoir volume (SRV) was presented for tight oil reservoirs. Both inner and outer regions were assumed as single porosity media but had different formation parameters. Laplace transformation method, point source function integration method, superposition principle, Stehfest numerical algorithm, and Duhamel’s theorem were used comprehensively to obtain the semianalytical solution. Different flow regimes were divided based on pressure transient analysis (PTA) curves. According to rate transient analysis (RTA), the effects of related parameters such as SRV radius, storativity ratio, mobility ratio, fracture number, fracture half-length, and fracture spacing were analyzed. The presented model and obtained results in this paper enrich the performance analysis models of MsFHW considering SRV.

scholarly journals Multiporosity and Multiscale Flow Characteristics of a Stimulated Reservoir Volume (SRV)-Fractured Horizontal Well in a Tight Oil Reservoir

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2724 ◽  
Author(s):  
Long Ren ◽  
Wendong Wang ◽  
Yuliang Su ◽  
Mingqiang Chen ◽  
Cheng Jing ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Oil Reservoirs ◽  
Natural Fracture ◽  
Tight Oil ◽  
Fracture System ◽  
Stimulated Reservoir Volume ◽  
Discrete Fracture Model ◽  
Reservoir Volume ◽  
Fractured Horizontal Well ◽  
Tight Oil Reservoirs

There are multiporosity media in tight oil reservoirs after stimulated reservoir volume (SRV) fracturing. Moreover, multiscale flowing states exist throughout the development process. The fluid flowing characteristic is different from that of conventional reservoirs. In terms of those attributes of tight oil reservoirs, considering the flowing feature of the dual-porosity property and the fracture network system based on the discrete-fracture model (DFM), a mathematical flow model of an SRV-fractured horizontal well with multiporosity and multipermeability media was established. The numerical solution was solved by the finite element method and verified by a comparison with the analytical solution and field data. The differences of flow regimes between triple-porosity, dual-permeability (TPDP) and triple-porosity, triple-permeability (TPTP) models were identified. Moreover, the productivity contribution degree of multimedium was analyzed. The results showed that for the multiporosity flowing states, the well bottomhole pressure drop became slower, the linear flow no longer arose, and the pressure wave arrived quickly at the closed reservoir boundary. The contribution ratio of the matrix system, natural fracture system, and network fracture system during SRV-fractured horizontal well production were 7.85%, 43.67%, and 48.48%, respectively in the first year, 14.60%, 49.23%, and 36.17%, respectively in the fifth year, and 20.49%, 46.79%, and 32.72%, respectively in the 10th year. This study provides a theoretical contribution to a better understanding of multiscale flow mechanisms in unconventional reservoirs.

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