fluid containing a temporary blocking agent in an amount sufficient to close off zones 1 and 3 is injected into well 10 this injection fluid containing the temporary blocking agent should be of a specific gravity in combination with the ball sealers blocking zone 2 to prevent dislodgement of the ball sealers 12 blocking agents utilized should be of a composition and specific gravity sufficient to close pores in the formation for the desired time period blocking agent compositions sufficient for this purpose are described in my u s patent application herein identified as ser no 625 430 filed june 28 1984 this application is hereby incorporated by reference of course as is understood by those skilled in the art the temporary blocking agent employed will vary depending upon formation conditions and the time period for which it is desired to temporarily close pores in the formation or reservoir zone having lesser degrees of permeability a preferred mixture used to obtain the desired stability and rigidity for example is a mixture of hydropropyl guar cross linked with transitional metals and ions thereof the purpose of the transitional metal ions is to provide increased strength stability and rigidity for the gel hydropropyl guar is placed into the gel mixture in an amount of from about 0 70 to about 10 0 weight percent of said mixture as preferred hydropropyl guar is placed in said mixture in about 7 2 percent by weight of said mixture metallic ions which can be used in the.