In oil cementing operations, the fluid loss of cement slurry has a huge impact on the quality of cementing. Cement slurry, which is made up of water and suspended particles, is a key material for cementing. When the cement slurry in the well contacts a permeable formation and there is a pressure difference, water will seep through the formation, leaving the particles behind. This is what we call the fluid loss phenomenon. Kelioil focuses on the research and development of cementing products. The fluid loss reducer it has launched can greatly reduce the fluid loss of cement slurry, thanks to its unique formula and working mechanism. The fluid loss tester developed by Nithons Company helps accurately detect the fluid loss in the laboratory. By following the standard procedures, we can obtain the fluid loss data of cement slurry under specific working conditions.
The fluid loss of cement slurry is extremely harmful to cementing operations, and it is of vital importance to prevent such fluid loss. Fluid loss can change the properties of cement slurry, making it thicker, increasing the flow resistance and pumping pressure, and even causing the interruption of construction. It can also accelerate the hydration reaction, shorten the thickening time, and lead to tight construction schedules. Meanwhile, fluid loss alters the flow pattern of cement slurry, reducing the displacement efficiency, affecting the sealing performance of cementing. In severe cases, it can trigger bridging, obstructing the upward movement of cement slurry. Moreover, the increase in pumping pressure caused by fluid loss may fracture the formation, resulting in the leakage of cement slurry, a decrease in the height of the cement return, damage to the formation stability, and posing a threat to the long-term safe production of oil wells.
To control the fluid loss of cement slurry, scientific and effective methods need to be adopted. On the one hand, adding Kelioil fluid loss reducers is a proven approach. These fluid loss reducers work by forming a low-permeability filter cake at the interface where the cement slurry contacts the formation, or by increasing the viscosity of the liquid phase of the cement slurry, thus reducing the rate at which water permeates through the formation, and ultimately achieving the goal of controlling the fluid loss. In practical applications, the amount of fluid loss reducer to be added should be precisely determined according to the specific formulation of the cement slurry and the conditions of the wellbore. On the other hand, make full use of the Nithons fluid loss tester to carry out laboratory testing work. Before the cementing operation, conduct multiple rounds of fluid loss tests on cement slurries with different formulations. Flexibly adjust the dosage of the fluid loss reducer and the formulation of the cement slurry according to the test results to ensure that the fluid loss of the cement slurry meets the construction requirements. During the construction process, samples of the cement slurry can also be taken in real time and tested using the fluid loss tester to promptly detect and solve abnormal fluid loss problems.
In conclusion, the issue of fluid loss in petroleum cementing slurries should not be overlooked. Coreole's fluid loss reducers and Ningsai's fluid loss testers provide reliable products and technical support for solving this problem. By scientifically adding fluid loss reducers and using fluid loss testers for precise detection and regulation, the fluid loss of cement slurries can be effectively controlled, ensuring the quality of cementing operations. This lays a solid foundation for the smooth implementation of petroleum cementing operations and the long-term stable production of oil wells.
