scholarly journals A multi-linear flow model for multistage fractured horizontal wells in shale reservoirs

2016 ◽  
Vol 7 (3) ◽  
pp. 747-758 ◽  
Author(s):  
Qi Zhang ◽  
Yuliang Su ◽  
Min Zhang ◽  
Wendong Wang
Keyword(s):  
Flow Model ◽  
Horizontal Wells ◽  
Linear Flow ◽  
Shale Reservoirs ◽  
Fractured Horizontal Wells

Comparison of Fractured-Horizontal-Well Performance in Tight Sand and Shale Reservoirs

2011 ◽  
Vol 14 (02) ◽  
pp. 248-259 ◽  
Author(s):  
E.. Ozkan ◽  
M Brown ◽  
R.. Raghavan ◽  
H.. Kazemi
Keyword(s):  
Hydraulic Fracture ◽  
Horizontal Well ◽  
Flow Model ◽  
Horizontal Wells ◽  
Natural Fracture ◽  
Well Performance ◽  
Fracture Conductivity ◽  
Fractured Horizontal Well ◽  
Shale Reservoirs ◽  
Fractured Horizontal Wells

Summary This paper presents a discussion of fractured-horizontal-well performance in millidarcy permeability (conventional) and micro- to nanodarcy permeability (unconventional) reservoirs. It provides interpretations of the reasons to fracture horizontal wells in both types of formations. The objective of the paper is to highlight the special productivity features of unconventional shale reservoirs. By using a trilinear-flow model, it is shown that the drainage volume of a multiple-fractured horizontal well in a shale reservoir is limited to the inner reservoir between the fractures. Unlike conventional reservoirs, high reservoir permeability and high hydraulic-fracture conductivity may not warrant favorable productivity in shale reservoirs. An efficient way to improve the productivity of ultratight shale formations is to increase the density of natural fractures. High natural-fracture conductivities may not necessarily contribute to productivity either. Decreasing hydraulic-fracture spacing increases the productivity of the well, but the incremental production gain for each additional hydraulic fracture decreases. The trilinear-flow model presented in this work and the information derived from it should help the design and performance prediction of multiple-fractured horizontal wells in shale reservoirs.

Composite linear flow model for multi-fractured horizontal wells in tight sand reservoirs with the threshold pressure gradient

2018 ◽  
Vol 165 ◽  
pp. 890-912 ◽  
Author(s):  
Jie Zeng ◽  
Xiangzeng Wang ◽  
Jianchun Guo ◽  
Fanhua Zeng ◽  
Qiushi Zhang
Keyword(s):  
Pressure Gradient ◽  
Flow Model ◽  
Horizontal Wells ◽  
Threshold Pressure ◽  
Threshold Pressure Gradient ◽  
Linear Flow ◽  
Fractured Horizontal Wells

Composite linear flow model for multi-fractured horizontal wells in heterogeneous shale reservoir

2017 ◽  
Vol 38 ◽  
pp. 527-548 ◽  
Author(s):  
Jie Zeng ◽  
Xiangzeng Wang ◽  
Jianchun Guo ◽  
Fanhua Zeng
Keyword(s):  
Flow Model ◽  
Horizontal Wells ◽  
Linear Flow ◽  
Shale Reservoir ◽  
Fractured Horizontal Wells

A novel method for interpreting water data during flowback and early-time production of multi-fractured horizontal wells in shale reservoirs

2018 ◽  
Vol 200 ◽  
pp. 186-198 ◽  
Author(s):  
Pin Jia ◽  
Linsong Cheng ◽  
Christopher R. Clarkson ◽  
Shijun Huang ◽  
Yonghui Wu ◽  
...  
Keyword(s):  
Early Time ◽  
Horizontal Wells ◽  
Time Production ◽  
Novel Method ◽  
Shale Reservoirs ◽  
Fractured Horizontal Wells

Practical Solutions for Pressure-Transient Responses of Fractured Horizontal Wells in Unconventional Shale Reservoirs

2011 ◽  
Vol 14 (06) ◽  
pp. 663-676 ◽  
Author(s):  
M.. Brown ◽  
E.. Ozkan ◽  
R.. Raghavan ◽  
H.. Kazemi
Keyword(s):  
Horizontal Wells ◽  
Flow Regimes ◽  
Fluid Exchange ◽  
Diagnostic Features ◽  
Pressure Transient ◽  
Flow Solution ◽  
The Matrix ◽  
Computationally Intensive ◽  
Shale Reservoirs ◽  
Fractured Horizontal Wells

Summary This paper presents an analytical trilinear-flow solution to simulate the pressure-transient and production behaviors of fractured horizontal wells in unconventional shale reservoirs (Ozkan et al. 2009). The model is simple, but versatile enough to incorporate the fundamental petrophysical characteristics of shale reservoirs, including the intrinsic properties of the matrix and the natural fractures. Special characteristics of fluid exchange among various reservoir components may also be considered. Computational convenience of the trilinear-flow solution makes it a practical alternative to more rigorous but computationally intensive and time-consuming solutions. Another advantage of the trilinear-flow solution is the convenience in deriving asymptotic approximations that provide insight about potential flow regimes and the conditions leading to these flow regimes. Though linear- and bilinear-flow regimes have been noted for fractured horizontal wells in the literature on the basis of their diagnostic features, they have not been associated with particular reservoir characteristics and flow relationships. The trilinear-flow solution also provides a suitable algorithm for the regression analysis of pressure-transient tests in shale reservoirs.

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