Can Shale-Like Stimulations Unlock the Potential of Extremely Low Permeability Tight Gas Reservoirs?

2013 ◽  
Author(s):  
Olubunmi O. Owolabi ◽  
Richard F. Volz ◽  
Phil S. Smith
Keyword(s):  
Low Permeability ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs

New Method for Evaluating Rock Stress Sensitivity for Low-Permeability Tight Gas Reservoirs

2017 ◽  
Vol 53 (1) ◽  
pp. 68-76 ◽  
Author(s):  
Zhaopeng Yang ◽  
Hao Yang ◽  
Heping Chen ◽  
Hongqiang Zhang
Keyword(s):  
Stress Sensitivity ◽  
New Method ◽  
Low Permeability ◽  
Tight Gas ◽  
Rock Stress ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs

scholarly journals Pre-acid system for improving the hydraulic fracturing effect in low-permeability tight gas reservoir

2021 ◽  
Vol 11 (4) ◽  
pp. 1761-1780
Author(s):  
Nianyin Li ◽  
Fei Chen ◽  
Jiajie Yu ◽  
Peihong Han ◽  
Jia Kang
Keyword(s):  
Hydraulic Fracturing ◽  
Filter Cake ◽  
Low Permeability ◽  
Tight Gas ◽  
Acid System ◽  
Fracturing Fluid ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs ◽  
Acid Fracturing ◽  
Performance Requirements

AbstractHydraulic fracturing is an important technical means to improve the development effect of low-permeability oil and gas reservoirs. However, for low pressure, low-permeability, tight, and high-clay sandstone gas reservoirs, conventional propped fracturing can cause serious damage to the reservoir and restrict the fracturing effect. The pre-acid fracturing technology combines acid treatment technology with sand-fracturing technology. A pre-acid system that meets special performance requirements is injected before fracturing. The pre-acid reduces the formation fracture pressure and removes clay damage. During acid flowback, the fracturing fluid is promoted to break the gel, dissolve the fracturing fluid residue and polymer filter cake, clean the supporting cracks, and effectively improve the fracturing effect. This study analyzes the process principle and technical advantages of the pre-acid fracturing technology based on the laboratory evaluation of the fracturing damage mechanism of low-permeability tight gas reservoirs. To meet the performance requirements of low-permeability tight gas reservoirs and pre-acid fracturing technology, a set of polyhydrogen acid system with long-lasting slow reactivity, low damage, and low corrosion was developed and used as the pre-fracturing acid. The acid system is mainly composed of the main agent SA601 and the auxiliary agent SA701. Then, on the basis of laboratory experiments, this acid system is used as the fracturing pre-acid to evaluate the fracturing improvement effect. The results show that the fracturing fluid system can better dissolve the fracturing fluid filter cake and remove the fracturing fluid damage.

A Model for Predicting Productivity of Multi-Staged Fractured Horizontal Wells in Ultra-Low Permeability Tight Gas Reservoirs

2014 ◽  
Vol 934 ◽  
pp. 143-149
Author(s):  
Chun Cheng Yang ◽  
Hong Jun Yin ◽  
Tang Qian Zhu ◽  
Lei Wang
Keyword(s):  
Pressure Gradient ◽  
Pressure Loss ◽  
Horizontal Wells ◽  
Low Permeability ◽  
Threshold Pressure ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Threshold Pressure Gradient ◽  
Tight Gas Reservoirs ◽  
Fractured Horizontal Wells

Based on the equivalent radius model and superposition potential, a productivity model for ultra-low permeability tight gas reservoirs was developed, which considered the influence of the threshold pressure gradient and the variable mass flow in fractures, and pressure loss inside the wellbore. With examples for capacity sensitive factors are analyzed. The results show that the threshold pressure gradient must be accounted to evaluate the productivity in ultra-low permeability tight gas reservoirs; after considering wellbore pressure loss; close toe fractures inflow velocity segment has been reduced; the larger matrix permeability, the greater the optimum fracture conductivity; When the number of fracture is more, the greater the impact on the capacity of the fracture angle. The research results provide a scientific basis for the design of multi-fractured horizontal wells in the ultra-low permeability tight gas reservoirs.

Data Acquistion and Formation Evaluation Strategies in Anistrospic, Tight Gas Reservoirs

2008 ◽  
Author(s):  
Hans de Koningh ◽  
Bernd Heinrich Herold ◽  
Koksal Cig ◽  
Fahd Ali ◽  
Sultan Mahruqy ◽  
...  
Keyword(s):  
Tight Gas ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs ◽  
Formation Evaluation ◽  
Evaluation Strategies ◽  
Data Acquistion

Underbalanced Drilling Technology for Unconventional Tight Gas Reservoirs

2014 ◽  
Author(s):  
Hani Qutob ◽  
Khelil Kartobi ◽  
Abdelaziz Khlaifat
Keyword(s):  
Tight Gas ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs ◽  
Underbalanced Drilling ◽  
Drilling Technology

A new dynamic capillary-number-recovery evaluation method for tight gas reservoirs

2021 ◽  
pp. 108730
Author(s):  
Fulei Zhao ◽  
Pengcheng Liu ◽  
Shengye Hao ◽  
Xinyu Qiu ◽  
Ce Shan ◽  
...  
Keyword(s):  
Capillary Number ◽  
Evaluation Method ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs
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