Pressure Transient Analysis for Composite Tight Oil Reservoirs after Fracturing

2015 ◽  
Author(s):  
Jianchun Xu ◽  
Guangwei Han ◽  
Ruizhong Jiang ◽  
Qi Deng ◽  
Yulong Zhao
Keyword(s):  
Transient Analysis ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Pressure Transient Analysis ◽  
Pressure Transient ◽  
Tight Oil Reservoirs

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 Pressure Transient Behavior of Horizontal Well with Time-Dependent Fracture Conductivity in Tight Oil Reservoirs

Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-19 ◽  
Author(s):  
Qihong Feng ◽  
Tian Xia ◽  
Sen Wang ◽  
Harpreet Singh
Keyword(s):  
Horizontal Well ◽  
Transient Behavior ◽  
Oil Reservoirs ◽  
Time Dependent ◽  
Tight Oil ◽  
Fracture Conductivity ◽  
Pressure Transient ◽  
Fractured Horizontal Well ◽  
Proposed Model ◽  
Tight Oil Reservoirs

This work presents a discussion on the pressure transient response of multistage fractured horizontal well in tight oil reservoirs. Based on Green’s function, a semianalytical model is put forward to obtain the behavior. Our proposed model accounts for fluid flow in four contiguous regions of the tight formation by using pressure continuity and mass conservation. The time-dependent conductivity of hydraulic fractures, which is ignored in previous models but highlighted by recent experiments, is also taken into account in our proposed model. We also include the effect of pressure drop along a horizontal wellbore. We substantiate the validity of our model and analyze the different flow regimes, as well as the effects of initial conductivity, fracture distribution, and geometry on the pressure transient behavior. Our results suggest that the decrease of fracture conductivity has a tremendous effect on the well performance. Finally, we compare our model results with the field data from a multistage fractured horizontal well in Jimsar sag, Xinjiang oilfield, and a good agreement is obtained.

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