Based on several years water shutoff practice, current water shutoff methods and blocking agents needs to be improved.

根据几年来的堵水实践，目前的堵水方式和堵剂还须进一步完善、提高。

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IPCS technology was aimed at improving the effection that water shutoff and profile control enhance recovery efficiency factor.

IPCS技术的目的就在于改善高含水期堵水调剖提高采收率的作用。

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But the performance characteristics of common cement have influence on the further improving economic benefit of oil well water shutoff.

但普通油井水泥由于其性能特点，影响了堵水经济效益的进一步提高。

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