Author(s)

Jun Wang

Corresponding Author

Jun Wang

Abstract

Oil-based mud horizontal wells drilled with fractured development strata, prone to well leaks, and a large loss of oil-based mud not only increases drilling costs and destroys the environment. In order to solve the problem of oil-based mud leakage effectively, a set of cement slurry system which can be used for horizontal oil-based mud plugging is developed through the optimization of additive materials. The results show that the thickening time of the cement slurry is adjustable, the temperature is not sensitive, the early strength is developing rapidly, the oil-based mud pollution is good, the cement slurry is 40% by volume Oil-based mud pollution, 24-hour conservation strength of up to 1.9 MPa. The cement slurry technology has been successfully applied to the coke rock shale gas horizontal well plugging operation, the site effect is good.

Keywords

Mud System; Shale Gas; Oil Well Explorer