Drilling fluid is an indispensable and important part of oil drilling engineering. On the one hand, it is related to safe, fast and high quality drilling, on the other hand, it is related to reservoir protection. The effects of potassium formate drilling fluid on drilling fluid can be summarized as follows: protecting borehole wall, balancing formation earth pressure, cooling and lubricating drilling tools, providing bottom hole power, hydraulic rock breaking and returning bottom hole samples. But can potassium formate drilling fluid meet the six major trends of oil and gas exploration?

To develop a new generation of petroleum geological exploration theory and supporting exploration engineering technology, the deeper the well is drilled, the more important the drilling fluid is. Potassium formate drilling fluid is widely used and can solve various problems, which vary greatly from place to place.

Six major trends in oil and gas exploration:

Development from Tectonic Trap to Lithologic Stratigraphic Trap

From Simple Structure to Complex Thrust Zone

Extension from middle and shallow layers to deep and ultra-deep layers

From Clastic Rock to Carbonate Rock and Volcanic Rock Exploration

Natural gas exploration has entered a period of rapid development

Mature basins enter the stage of fine exploration

Potassium formate plays a major role in drilling and completion fluids, and can be completely dissociated. At the same dosage, the effective K concentration is higher than that of potassium chloride, and there is no anionic chloride pollution. The surface tension of filtrate is obviously greater than that of potassium chloride drilling and completion fluids, and the flow resistance of infiltration formation is large, which not only inhibits clay hydration, dispersion and expansion. It can prevent formation shrinkage without interfering with electrical measurements, light corrosion and pollution to reservoir.

The preparation and maintenance method of potassium formate system is simple, the performance is superior, the cost is moderate, the borehole wall stability is good, and the borehole diameter expansion rate is only 2.25%. It has good temperature resistance, and its rheological property and filtration capacity have little change under 60 - 180 degrees Celsius conditions, which can meet the needs of field engineering.