Concerning the issue of mudding permeable beds when using clayless drilling fluids

Abstract

In conditions of multi-zone hydrocarbons deposits non-uniform in depth and strike the use of carbonate blockers of the same type is ineffective due to the low reliability of the data on the size of collector pores. The problem can be solved by using composite blockers containing both rigid and elastic materials. The paper shows the results of laboratory studies and examples of practical application of the composite blockers in Biokar clayless mud system.