A Comparative Study of Monotonic and Cyclic Injection Hydraulic Fracturing in Saturated Tight Rocks Under Triaxial Stress

2020 ◽  
Author(s):  
Saurabh Goyal ◽  
Mark E. Curtis ◽  
Carl H. Sondergeld ◽  
Chandra S. Rai
Keyword(s):  
Hydraulic Fracturing ◽  
Comparative Study ◽  
Triaxial Stress ◽  
Cyclic Injection ◽  
Tight Rocks

scholarly journals Integrated hydraulic fracturing techniques to enhance oil recovery from tight rocks

2019 ◽  
Vol 46 (5) ◽  
pp. 1065-1072 ◽  
Author(s):  
Fujian ZHOU ◽  
Hang SU ◽  
Xingyuan LIANG ◽  
Leifeng MENG ◽  
Lishan YUAN ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Oil Recovery ◽  
Enhance Oil Recovery ◽  
Tight Rocks

Comparative Study of Different Sand Samples and Potential for Hydraulic-Fracturing Applications

2012 ◽  
Author(s):  
Ramya Kothamasu ◽  
Yogesh Kumar Choudhary ◽  
Kumarakurubaran Murugesan
Keyword(s):  
Hydraulic Fracturing ◽  
Comparative Study

An Environment Friendly Approach to Reduce the Breakdown Pressure of High Strength Unconventional Rocks by Cyclic Hydraulic Fracturing

2019 ◽  
Vol 142 (4) ◽  
Author(s):  
Zeeshan Tariq ◽  
Mohamed Mahmoud ◽  
Abdulazeez Abdulraheem ◽  
Dhafer Al-Shehri ◽  
Mobeen Murtaza
Keyword(s):  
Hydraulic Fracturing ◽  
High Strength ◽  
Progressive Increase ◽  
New Method ◽  
Hydraulic Fractures ◽  
Breakdown Pressure ◽  
Environment Friendly ◽  
Rock Types ◽  
Pressurization Rate ◽  
Tight Rocks

Abstract Unconventional hydrocarbon resources mostly found in highly stressed, overpressured, and deep formations, where the rock strength and integrity are very high. When fracturing these kinds of rocks, the hydraulic fracturing operation becomes much more challenging and difficult and in some cases reaches to the maximum pumping capacity limits without generating any fracture. This reduces the operational gap to optimally place the hydraulic fractures. Current stimulation methods to reduce the fracture pressures involvement with adverse environmental effects and high costs due to the entailment of water mixed with huge volumes of chemicals. In this study, a new environment friendly approach to reduce the breakdown pressure of the unconventional rock is presented. The new method incorporates the injection of chemical-free fracturing fluid in a series of cycles with a progressive increase of the pressurization rate in each cycle. This study is carried out on different cement blocks with varying petrophysical and mechanical properties to simulate real rock types. The results showed that the new method of cyclic fracturing can reduce the breakdown pressure to 24.6% in ultra-tight rocks, 19% in tight rocks, and 14.8% in medium- to low-permeability rocks. This reduction in breakdown pressure helped to overcome the operational challenges in the field and makes the fracturing operation much greener.

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