China Petroleum Network News (special correspondent Wang Jie, correspondent Qi Ben Chen Xu) on June 30, Bohai Drilling independently developed a high-strength low-density cement slurry system, which was applied in well ban 111 of Dagang Oilfield, and the cementing quality was qualified through acoustic amplitude testing.
It is understood that well ban 111 has large annular space, long sealing section and low formation pressure bearing capacity, and Party A requires to return to the surface at one time, which is easy to cause leakage phenomenon and has high requirements on the performance of cement slurry system.
In order to successfully complete the construction task, the scientific research personnel of the company intervened in advance to optimize the lightening materials of cement slurry system according to the underground geological and stratigraphic characteristics and cementing construction difficulties of the well. Through the test and review of different proportions of stabilizer, expansion agent, dispersant and reinforcement agent in cement slurry, the company gradually explored to form a low water loss and rapid strength development meeting the requirements of different densities Cement slurry system can effectively solve the cementing problem of long sealing section in low pressure and easy to leak formation.
In the process of operation, the company’s scientific researchers focus on the well, the whole process is safe, stable and efficient.
