Gas Filtration in a Low-Permeability Formation with a Hydraulically Fractured Well

2019 ◽  
Keyword(s):  
Low Permeability ◽  
Gas Filtration ◽  
Fractured Well

Numerical Well-Testing Model of Fractured-Well in Low Permeability Reservoir Based on Mutative Permeability Effect

2013 ◽  
Vol 433-435 ◽  
pp. 1984-1987
Author(s):  
Yu Chen Zhang ◽  
Jiu Ning Zhou ◽  
Jing Wen Cui
Keyword(s):  
Low Permeability ◽  
Well Testing ◽  
Upward Movement ◽  
Threshold Pressure ◽  
Algebraic Equations ◽  
Pressure Derivative ◽  
Threshold Pressure Gradient ◽  
Well Model ◽  
Numerical Well Testing ◽  
Fractured Well

At present, threshold pressure gradient method is usually used for describing fluid flow in low-permeability media. However, it is only an approximate approach. In this paper, a 2-D fractured-well model for numerical well-testing considering non-darcy mutative-permeability effect was established, and PSOR iterative algorithm was used for solving the sets of algebraic equations. Based on this model, the typical curves of pressure and pressure derivative were drawn with different sets of parameters. When considering mutative-permeability effect, the pressure derivative curves move upward in each flowing period compared with darcy flowing model. In addition, the range of upward movement is larger as the non-darcy effect is more notable.

Influence of Perforating Parameters on the Productivity of Fractured Well in Tight Reservoir

2013 ◽  
Vol 848 ◽  
pp. 92-95
Author(s):  
Hai Yong Zhang ◽  
Shun Li He ◽  
Dai Hong Gu ◽  
Guo Hua Luan ◽  
Cheng Quan Men ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Specific Area ◽  
Field Application ◽  
Oil Field ◽  
Low Permeability ◽  
Effective Measure ◽  
Low Permeability Reservoir ◽  
Artificial Fracture ◽  
Fractured Well ◽  
Selection Of

Hydraulic fracturing is an effective measure to increase oil production for the development of low permeability reservoir. The selection of perforating parameters has a direct effect on the fracture expansion, formation fracture cracking pressure and even the implementation success of fracturing in that the fracturing processing fluid and artificial fracture all need to pass through the extension of perforation. In field application, the selection of perforating parameters is usually determined base on experience without combining with the actual data of the hydraulic fracturing wells. This work focuses on analyzing the influence of perforating parameters on the productivity of fractured well based on an established productivity prediction model through analytical method.Results show that, take a specific area of Changqing oil field for example, the perforation diameter has little effect on the productivity after fracturing, the other optimized perforating parameters are as follows: the perforation degree 30~40%, perforation density 8~12 perforation per meter, perforation depth 0.2~0.3m. The results are helpful to guide the optimization of perforating parameters in low permeability reservoir.

New method of ultra-low permeability estimation by steady-state gas filtration

2019 ◽  
pp. 32-35
Author(s):  
A.M. Gorshkov ◽  
◽  
S.V. Parnachev ◽  
I.V. Andreev ◽  
M.A. Romanyuta ◽  
...  
Keyword(s):  
Steady State ◽  
New Method ◽  
Low Permeability ◽  
Gas Filtration ◽  
Permeability Estimation

Hydroelectric simulation experimental research on fractured well pattern in low permeability reservoirs

2013 ◽  
Vol 30 (3) ◽  
pp. 294-298
Author(s):  
Yuliang Su ◽  
Guoliang Cao ◽  
Bin Yuan ◽  
Guangzhong Lyu ◽  
Wendong Wang ◽  
...  
Keyword(s):  
Experimental Research ◽  
Low Permeability ◽  
Well Pattern ◽  
Fractured Well ◽  
Low Permeability Reservoirs

The Non-Darcy Flow Mathematic Model with Fluid-Solid Coupled of Fractured Vertical Well Pattern in Thin Inter-Bedded Reservoirs

2014 ◽  
Vol 675-677 ◽  
pp. 1535-1540
Author(s):  
Ying Gao ◽  
Wei Yao Zhu ◽  
Ming Yue ◽  
Ai Shan Li ◽  
Shou Ma
Keyword(s):  
Flow Field ◽  
Pressure Gradient ◽  
Dynamic Models ◽  
Mathematic Model ◽  
Darcy Flow ◽  
Low Permeability ◽  
Well Pattern ◽  
Flow Mechanisms ◽  
Fractured Well ◽  
Starting Pressure Gradient

Thin inter-bedded low permeability reservoir is sand layer alternating with mud layer and seriously longitudinal heterogeneous. Fluid flowing in this reservoir presents non-linear seepage characteristics. The dynamic models of porosity and permeability were deduced by the concept of bulk strain. Based on flow field partition principle, oil flow field of overall fractured cross-row well pattern could be divided into four units. Each unit could be divided into three regions with different flow mechanisms. Considering non-Darcy flow and fluid-solid coupled, a mathematical model was established for overall-fractured well pattern in thin inter-bedded reservoirs. The results show that production of well pattern with fluid-solid coupled effect is less than that without. Production of thin inter-bedded reservoir grows with the increase of the ratio of net pay thickness to gross thickness (NTG). With increasing semi-length of hydraulic fracture, production of overall fractured well pattern increases with decreasing increment. The more starting pressure gradient, the smaller production of well pattern in thin inter-bedded low permeability. When the starting pressure gradient exceeds 0.01MPa/m, it influences the production remarkably.

A Novel Non-Destructive and Rapid Cleaning Method for Intact Ultra-Low Permeability Rocks

2019 ◽  
Author(s):  
Andreina Guedez ◽  
William Mickelson ◽  
Samuel Aldin ◽  
Deepak Gokaraju ◽  
Abhijit Mitra ◽  
...  
Keyword(s):  
Low Permeability ◽  
Cleaning Method ◽  
Non Destructive

Subcritical Crack Growth and Long-Term Strength in Rock and High-Strength and Ultra Low-Permeability Concrete

2009 ◽  
Vol 58 (6) ◽  
pp. 525-532 ◽  
Author(s):  
Yoshitaka NARA ◽  
Masafumi TAKADA ◽  
Daisuke MORI ◽  
Hitoshi OWADA ◽  
Tetsuro YONEDA ◽  
...  
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
High Strength ◽  
Low Permeability ◽  
Term Strength
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