Example Problems
1. What type of frac fluid system is used in formations with high Young’s modulus and low Poisson’s ratio? Why?
2. What type of frac fluid system is used in formations with low Young’s modulus and high Poisson’s ratio? Why?
3. What type of frac fluid system is ideal for underpressured and depleted reservoirs? Why?
4. Why is foam fracturing ideal for water-sensitive formations with high percentage of clay?
5. What is the most common foam quality (FQ) used in coalbed methane (CBM) wells?
6. Why is a foam frac fluid system considered to have a better fluid efficiency and lower fluid-loss feature? Give an example.
7. You are treating a frac stage in the field using slick water fluid system. The stage treats very well at lower ...
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