Optimized cement slurry improves bonding in Tabamiao block wells

Jian Song Gonghu Liu Yan Jin Mian Chen China University of Petroleum Beijing Optimization of the displacement flow rate improved the cement bonding of Tabamiao block's gas exploration wells in the Ordos basin of north central China. Tests indicated that the mixing energy determined in a laboratory was less than the mixing energy in a cementing unit during a pump job, resulting in a different cement slurry flow regime. Good cement bonds for preventing gas migration require the removal of mud, and the flow regime of cement slurry in an annular space is one key factor for good mud removal. The displacement of drilling mud improves if the cement slurry in the well's annulus is in turbulent f...

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