Research and assessment of high efficiency new temporary plugging agent used for refracturing

After a period of time of production, in some wells, the crude oil at the old crack has basically been taken out, but there´s certain amount of recoverable reserves. In order to improve the efficiency of these wells, refracturing is required. Temporary plugging agent in refracturing played a very important role; it is the key to the success of re-fracturing. In this article, a new kind of temporary plugging agent has been developed, we do lots of laboratory testing researches about its performance and temporary plugging effect. It is can seen from experiment that the new temporary plugging agent has a good effect; it has no secondary pollution of wells. Temporary plugging agent can provide protection for wells, and it has a good prospect.