Horizon Attributes and Fracture-Swarm Sweet Spots in Low-Permeability Gas Reservoirs

2000 ◽  
Author(s):  
B.S. Hart ◽  
R.A. Pearson ◽  
J.M. Herrin ◽  
T. Engler ◽  
R.L. Robinson
Keyword(s):  
Low Permeability ◽  
Gas Reservoirs ◽  
Sweet Spots

scholarly journals Modeling and analyzing gas supply characteristics and development mode in sweet spots of Sulige tight gas reservoir, Ordos Basin, China

2018 ◽  
Vol 36 (4) ◽  
pp. 895-909
Author(s):  
Guang Ji ◽  
Jing Zhang ◽  
Zhikai Lv ◽  
Pengcheng Liu ◽  
Qingyan Yu
Keyword(s):  
Ordos Basin ◽  
Low Permeability ◽  
Tight Gas ◽  
High Permeability ◽  
Development Mode ◽  
Gas Reservoirs ◽  
Gas Reservoir ◽  
Tight Gas Reservoir ◽  
Gas Supply ◽  
Sweet Spots

In order to study the characteristics of the gas supply and development mode in sweet spots of Sulige tight gas reservoir in Ordos Basin, China, a mathematical model was developed for the typical lenticular reservoirs in tight gas reservoirs, and its analytical solution was obtained. The ideal model was calculated by using the analytical solution. Analysis of the production data indicated a clear boundary between the high- and low-permeability regions of the lenticular reservoir, and the boundary will supply gas to the low-permeability region. The reliability of this finding was validated by real production data. The development mode of the lenticular reservoir was obtained, that is the high-permeability area was first used during the initial production; when the pressure wave reached the boundary in the high-permeability region, the production showed a pseudo-steady state; further increase of the production pressure exceeding the threshold of the surrounding low-permeability region triggered the utilization of the low-porosity and low-permeability regions. The established model can provide useful guidance for the development of similar tight gas reservoirs.

The Seepage Pressure Distribution and the Capacity of Low-Permeability Reservoirs Gas

2013 ◽  
Vol 734-737 ◽  
pp. 1317-1323
Author(s):  
Liang Dong Yan ◽  
Zhi Juan Gao
Keyword(s):  
Mathematical Model ◽  
Pressure Distribution ◽  
Low Permeability ◽  
Flow State ◽  
Klinkenberg Effect ◽  
Gas Reservoirs ◽  
Gas Well ◽  
Seepage Pressure ◽  
Slippage Effect ◽  
Low Permeability Reservoirs

Low-permeability gas reservoirs are influenced by slippage effect (Klinkenberg effect) , which leads to the different of gas in low-permeability and conventional reservoirs. According to the mechanism and mathematical model of slippage effect, the pressure distribution and flow state of flow in low-permeability gas reservoirs, and the capacity of low-permeability gas well are simulated by using the actual production datum.

Gas Slippage Effect in Low Permeability Water-bearing Gas Reservoirs

2011 ◽  
Author(s):  
Xiaojuan Liu ◽  
Jian Yan ◽  
Yi Liu
Keyword(s):  
Low Permeability ◽  
Gas Reservoirs ◽  
Gas Slippage ◽  
Slippage Effect

Numerical Simulation of Low Permeability Unconventional Gas Reservoirs

2014 ◽  
Author(s):  
Yu Didier Ding ◽  
Yu-Shu Wu ◽  
Nicolas Farah ◽  
Cong Wang ◽  
Bernard Bourbiaux
Keyword(s):  
Numerical Simulation ◽  
Low Permeability ◽  
Gas Reservoirs ◽  
Unconventional Gas ◽  
Unconventional Gas Reservoirs

Shaped Memory Polymer: An Innovative Approach to Sand Control Open Hole Completion in Thin, Multilayered, Depleted Low Permeability Gas Reservoirs

2019 ◽  
Author(s):  
Jason Fuxa ◽  
Paolo Di Giampaolo ◽  
Giovanni Ferrara ◽  
Mario Di Pietro ◽  
Marco Sportelli ◽  
...  
Keyword(s):  
Innovative Approach ◽  
Low Permeability ◽  
Gas Reservoirs ◽  
Sand Control ◽  
Open Hole

Horizontal well transient rate decline analysis in low permeability gas reservoirs employing an orthogonal transformation method

2016 ◽  
Vol 33 ◽  
pp. 703-716 ◽  
Author(s):  
Li-Na Cao ◽  
Xiao-Ping Li ◽  
Cheng Luo ◽  
Lin Yuan ◽  
Ji-Qiang Zhang ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Orthogonal Transformation ◽  
Transformation Method ◽  
Low Permeability ◽  
Gas Reservoirs

Formation Damage Issues Impacting the Productivity of Low Permeability, Low Initial Water Saturation Gas Producing Formations

2005 ◽  
Vol 127 (3) ◽  
pp. 240-247 ◽  
Author(s):  
D. Brant Bennion ◽  
F. Brent Thomas
Keyword(s):  
Capillary Pressure ◽  
Water Saturation ◽  
The United States ◽  
Gas Production ◽  
Pressure Effects ◽  
Formation Damage ◽  
Low Permeability ◽  
Gas Reservoirs ◽  
Initial Water ◽  
The Impact

Very low in situ permeability gas reservoirs (Kgas<0.1mD) are very common and represent a major portion of the current exploitation market for unconventional gas production. Many of these reservoirs exist regionally in Canada and the United States and also on a worldwide basis. A considerable fraction of these formations appear to exist in a state of noncapillary equilibrium (abnormally low initial water saturation given the pore geometry and capillary pressure characteristics of the rock). These reservoirs have many unique challenges associated with the drilling and completion practices required in order to obtain economic production rates. Formation damage mechanisms affecting these very low permeability gas reservoirs, with a particular emphasis on relative permeability and capillary pressure effects (phase trapping) will be discussed in this article. Examples of reservoirs prone to these types of problems will be reviewed, and techniques which can be used to minimize the impact of formation damage on the productivity of tight gas reservoirs of this type will be presented.

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