CHEMICAL IMBIBITION BY GELS CONTAINING SURFACTANTS FOR FRACTURED CARBONATE RESERVOIRS

The present invention provides an imbibition gel composition that induces spontaneous imbibition of a water phase into a reservoir matrix. The imbibition gel composition including a surfactant, the surfactant operable to alter the wettability of a surface of a reservoir matrix from oil-wet toward water-wet and the surfactant further operable to diffuse through the water phase. The imbibition gel composition further including a gel system, the gel system operable to retain the surfactant and the gel system further operable to release the surfactant in the presence of the water phase, where altering the wettability of the surface of the reservoir matrix toward water- wet induces the spontaneous imbibition of the water phase into the reservoir matrix. 本发明提供了种促使水相自发渗吸至储层基质的渗吸凝胶组合物。所述渗吸凝胶组合物包含表面活性剂，所述表面活性剂能够有效地将储层基质表面的润湿性由油湿改变为水湿，并且所述表面活性剂还能够有效地扩散通过水相。所述渗吸凝胶组合物还包含凝胶体系，其能够有效地保持表面活性剂，并且所述凝胶体系还能够有效地在水相存在下释放表面活性剂，其中将所述储层基质表面的润湿性改变为水湿促使了水相自发渗吸至储层基质。