Application of a Novel Nano Latex Plugging Agent in Lufeng Block
To address the challenge of plugging low-permeability shale formations with traditional agents,a new type of spherical core-shell nano latex,PF-NSEAL,was developed and evaluated for its pressure transfer and micropore plugging performance.Pressure transfer and micropore plugging experiments demonstrated that the nano latex plugging agent effectively reduced the shale pore pressure transmission rate of drilling fluid and improved micropore plugging performance.Subsequently,PF-NSEAL was successfully applied in Paleogene strata in the Lufeng block.Upon adding PF-NSEAL to the field polymer KCl drilling fluid,the shale plugging effect was enhanced,filtration rate significantly reduced,and wellbore instability phenomenon was obviously improved.These promising results provide important field operation references for future large-scale applications.
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维普
