Patent ID: 7350579
Filing Date: 2008-04-01
Classification: C01P,C09C,C09K

Abstract:
1. A method for fracturing a formation comprising the step of: pumping a fracturing fluid including a composition comprising at least an acidifying agent and a surface modifying agent into a producing formation to enhance productivity at a pressure sufficient to fracture the formation and simultaneously to modify at least one of an aggregation potential and a zeta-potential of formation particles and formation surfaces so that the formation particles aggregate and/or cling to themselves and/or to the formation surfaces, where the acidifying agent acidifies the formation particles and the formation surfaces producing an effective number of surface hydroxyl groups (Sur- OH) and the surfacing modifying agent (A) converts an effective portion of the Sur-OH groups into active surfaces salts (Sur-O − -AH + ) resulting in the modification of the at least one of an aggregation potential and a zeta-potential of the formation particles and the formation surfaces.