What Are The Advantages Of Drilling Fluid Prepared With Potassium Formate

Potassium formate is mainly used to prepare water cut oil well filling fluid. It has been applied to drilling and completion fluid abroad in the late 1990s, especially in high-density drilling and completion fluid system, and achieved good results. The drilling fluid system prepared with potassium formate has the outstanding advantages of strong inhibition, good compatibility, reservoir protection, environmental protection, cost reduction and efficiency increase.

1. The density of liquid potassium formate solution is high - generally about 1.57g/cm3, so the prepared drilling fluid has a wide density range, which is conducive to improve the mechanical drilling rate, reduce the total production cost, and protect the reservoir.

2. It has good compatibility with common polymer treatment agents, and can slow down the hydrolysis of a variety of viscosity control agents and filtrate reducer under high temperature and high pressure

And oxidative degradation rate. Therefore, the prepared drilling fluid can resist high temperature and has stable performance.

3. Strong electrolyte. Therefore, it has a strong inhibitory effect on the hydration expansion and dispersion of shale, has good compatibility with reservoir rocks and fluids, and has significantly better resistance to salt, calcium and solid pollution than fresh water drilling fluid.

4. It has reducibility, so it has very weak corrosivity to metal, and basically will not cause damage to drilling tools, downhole equipment and materials, thus avoiding the use of NaCl, KCl The corrosion problem caused by the preparation of clean brine drilling fluid by halides such as CaCl2 (even if the corrosion inhibitor is added, it will inevitably cause serious damage to the drilling tools). The use of potassium formate drilling fluid can effectively protect the drilling tools and downhole equipment, so as to reduce the production cost.

5. It is non-toxic and has the function of organic potassium fertilizer. The waste liquid can be recycled and biodegraded naturally, which can not only meet the requirements of environmental protection, but also significantly reduce the cost of post-treatment.