The activity of water in the drilling fluid and the activity of the rock

Summary. Rock formations have an important influence on drilling fluids. Different types of rock formations have different effects on the properties, use, and effectiveness of drilling fluids.

First of all, the porosity and permeability of the rock formation will directly affect the filtration and intrusion ability of the drilling fluid. If the rock formation is porosity and permeability, the drilling fluid can easily penetrate into it, resulting in mud loss; The reverse is true. Therefore, the porosity and permeability of the rock formation need to be considered when selecting drilling fluids.

Secondly, the chemical composition of the rock formation will also have an impact on the properties of the drilling fluid. For example, rock formations high in magnesium and calcium will stabilize the colloidal substances in the drilling fluid, increase the viscosity and density of the drilling fluid, and reduce the performance of the mud. Finally, the stability of the rock formation also needs to be considered.

When taking drilling measures, it is necessary to avoid destroying the stability of the rock formation, so as not to cause accidents such as formation collapse.

Rock formations have an important impact on drilling fluids. Different types of rock formations have different effects on the properties, use, and effectiveness of drilling fluids. First of all, the porosity and permeability of the rock formation will directly affect the filtration and intrusion ability of the drilling fluid.

If the rock formation has large porosity and strong permeability, the drilling fluid can easily penetrate into it, resulting in mud loss; The reverse is true. Therefore, the porosity and permeability of the rock formation need to be considered when selecting drilling fluids. Secondly, the chemical composition of the rock formation will also have an impact on the properties of the drilling fluid.

For example, rock formations high in magnesium and calcium will stabilize the colloidal substances in the drilling fluid, increase the viscosity and density of the drilling fluid, and reduce the performance of the mud. Finally, the stability of the rock formation also needs to be considered. When taking drilling measures, it is necessary to avoid destroying the stability of the trapped rock formation, so as not to cause accidents such as formation collapse.

Drilling fluid is an indispensable part of the drilling process, in addition to lubrication, cooling, cleaning the wellbore, it can also control the stability of the well lifting base wall and prevent formation instability. But drilling fluids can also have an impact on the formation. If the drilling fluid is not properly selected or used, it may cause Gaosun formation pollution, fracturing and even downhole accidents.

Therefore, when selecting and using drilling fluids, it is necessary to fully consider factors such as rock formation type, mindful geological conditions, drilling technology, environmental protection, etc., and design and adjust them scientifically and reasonably. This is the only way to ensure that the effect of the drilling fluid is maximized, while protecting the geological environment and the safety of people.

Yes, the drilling fluid is used to bring the rock powder out of the well to lubricate the drilling tool and cold the drill bit.

1.It still has a certain impact on the performance of drilling fluids, especially the addition of additives with oil-based or drop-based functional groups.

2.However, as long as the amount of addition is well controlled, the impact is still relatively small.

3.What needs to be reminded of you is that the maintenance of drilling fluid is a maintenance "mixture" of technical work, just like the messy materials you put in the pot to boil into porridge, its temperature, put into the program, time, the size of the fire and other factors are affected, the key is whether the overall superposition of the impact has reached a significant change in the performance of the drilling fluid.

Standing in this perspective is more conducive to the improvement of your technical level.