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What are the types of oil and gas reservoir drilling fluids?

2021-12-22

Oil and gas reservoir drilling fluid is the "blood" of drilling and plays a very important role in drilling operations. Therefore, the requirements for drilling fluid are very high, according to the characteristics of different oil and gas layers, matching different types of drilling fluids. This article roughly summarizes the following four types of oil and gas reservoir drilling fluids for everyone.
 
Oil and gas reservoir drilling fluid types: 1) Water-based drilling fluid 2) Oil-based drilling fluid 3) Gas drilling fluid 4) Synthetic-based drilling fluid
 
1) Oil and gas reservoir drilling fluid-water-based drilling fluid
Water-based drilling fluid refers to the general term of various circulating fluids that meet the needs of drilling work with its multiple functions during oil and gas drilling. The water-based drilling fluid includes at least one rheology modifier and at least one of the following ingredients: inorganic salts, dispersants, shale stabilizers, weighting agents or finely divided clay particles.
 
2) Oil and gas reservoir drilling fluid-oil-based drilling fluid
Oil-based drilling fluid refers to the drilling fluid with oil as the continuous phase. The composition of the oil-based drilling fluid includes: oil, water, organoclay and oil-soluble chemical treatment agent.
 
3) Gas drilling fluid is formed by injecting air or nitrogen into conventional drilling fluid. It is a gas-liquid mixed system formed by adding gas as the dispersed phase, liquid as the continuous phase, and adding stabilizers. The gas-filled drilling fluid is mainly liquid, so it is not only a gas drilling fluid, but also a light water-based drilling fluid.
 
4) Oil and gas reservoir drilling fluid-synthetic base drilling fluid
Synthetic-based drilling fluid is a new type of drilling fluid system with oil-based drilling fluid characteristics in performance and environmental protection in nature. Synthetic-based drilling fluid is a continuous phase of artificially synthesized organics and brine as the dispersed phase. , Plus emulsifiers, fluid loss additives, flow modifiers and other components.
 
At present, the degree of reliance on advanced technology in drilling technology is increasing, and the type of oil and gas reservoir drilling fluid must match the requirements of the drilling technology on the specific drilling platform and the nature of the formation gas project.


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