1 Oilfield chemistry bases on and polymer chemistry. 2 There are two general types of drilling fluids: _and oil-based fluids. 3 The suitable pH value range for drilling fluids is 4 The two most commonly used acids in acidification are _and 5 The purpose of "profile control" is to improve increase the injected water thereby enhance 6 Heavy oil refers to the crude oil whose viscosity exceeds at the temperature of reservoir.

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Steady State Model

The steady-state model typically states that the entire universe is always enlarging, although it balances a fixed average density and matter that is being constantly generated to make new galaxies, star forms at a similar rate that the previous ones get indistinguishable due to the growing range and velocity of recession.