DEVELOPMENT OF ASSOCIATIVE POLYMER TECHNOLOGY FOR ACID DIVERSION
This paper describes the use of associative polymer technology (APT) to achieve fluid diversion during an acid stimulation treatment. APT involves the use of a very low viscosity aqueous polymer solution. It adsorbs immediately onto the formation surface and significantly reduces the ability of subsequent aqueous fluids to flow into high permeability portions of the rock. The first stage containing the APT predominately will enter the most permeable area, diverting following acid stage(s) to other less permeable sections of the rock. APT has little or no effect on the flow of subsequent hydrocarbon production. Parallel flow study data using water saturated and oil saturated cores will be presented which shows the ability of APT to divert acid, in both sandstone and carbonate cores. In addition, case histories will be presenting showing the effectiveness of APT.