Abstract:

A polymer/layer silicate PLS compound water absorher gel,a new kind of profile control agent，has been developed by using the monomer intercalated hybrids polymerizing method.Consideying the MMT’s constitute, fineness and surface character,through X diffraction analysis and Bragg formulae calculation,the interlamination spacing strutted by MMT is 0.6-1.2 nm.The objective numerators enter the main body of MMT’s interlamination effectively and form the compound sop stuff.In this paper, we not only optimize the construction of PLS, but also appraise its performance.Results have shown that the expanded ratio of PLS can be reached 13～62，is salt tolermore is 2.5×10⁴mg/L，temprratare tolerance is 90℃ according to water salinity.PLS gel has contractility in the oil.Furthermore，PLS gel has good tenacity and is unbreakable when temperature is 90℃ and the tenacity coefficient reaches 0.8-1.0. Through in-situ operation on Guan 48-4-1 well and 45-1 well in Dagang Oilfield，oil production has increased to 2 400 t. The input/output ratio has been reached 6:1，which has obvious effect.

Key words: PLS compound material, intercalated bed, hydroscopicity, tenacity, profile control