What is the advantage of potassium formate drilling fluid compared with silicate drilling fluid?

The drilling fluid is the circulating flushing medium for protecting the oil layer, protecting the drill bit and improving the drilling efficiency during the drilling process. There are many non-environmental protection factors in the production and use of traditional drilling fluids, which can cause environmental pollution, damage oil layers, and atmospheric pollution, and also greatly increase drilling costs. Among environmentally friendly drilling fluids, potassium formate drilling fluid and silicate drilling fluid are used more. Compared with the two, what are the advantages of potassium formate drilling fluid?

Silicate drilling fluid
In the last century, silicate is an inorganic non-metal with good compatibility with the environment, non-volatile, safe and non-toxic. The silicate drilling fluid based on this material has good inhibition, non-toxicity, low cost and no toxicity Fluorescence, without affecting logging, etc., are used in drilling fluid systems.

However, with the rapid development of the drilling industry, problems in the silicate drilling fluid system are gradually exposed. For example, the overall performance is difficult to meet the requirements of various complex wells and special process wells. The amount of acid salt increases the cost; it is difficult to control the performance due to the limitation of the use temperature and pH value, especially the rheological properties, etc. limit the use in drilling fluids.

Potassium formate drilling fluid
However, since this century, potassium formate drilling fluid has been used well at home and abroad, and it has been widely used. It has been successfully applied on site in complex wells such as the Junggar Basin, Tarim Basin, Tuha Basin in Xinjiang.

The advantages of potassium formate drilling fluid:
(1) When potassium formate drilling fluid contacts with formation water, no sediment will be formed, and the damage to the reservoir is low.
(2) The biological toxicity of potassium formate drilling fluid is extremely low, harmless and non-toxic to human body, little impact on aquatic community, and little bioconcentration.
(3) The potassium formate drilling fluid is biodegradable, does not pollute the environment, and is recyclable and reusable.
(4) Potassium formate drilling fluid can provide proper density for drilling and completion fluids, no solid weighting agent is needed, and it is easy to realize non-solid phase drilling or low solid phase drilling.
(5) The pH value of potassium formate drilling fluid is easy to adjust and has little corrosiveness to metals and rubber.
(6) The circulating pressure drop of potassium formate drilling fluid is small, easy to configure and simple to maintain.
(7) Potassium formate drilling fluid has low viscosity, good fluidity, and small friction pressure loss. It is suitable for drilling small holes and formations that are easy to lose.
(8) Potassium formate drilling fluid has strong inhibition, wellbore stability, and wellbore diameter. It has been applied in the eastern region successively and has obvious results. It has achieved high quality performance such as low toxicity, high efficiency, anti-collapse, strong inhibition, and protection of gas reservoirs.

Therefore, potassium formate drilling fluid is a more professional and new type of environmentally friendly drilling fluid, which can achieve pollution-free and residue-free during production and use.