Abstract: Based on the low cost and low agents of deep-water shutoff technique, we developed a complex slug deep-water shutoff technology. It is composed of two parts, one is movable weak gel (MWG), the other is a high strength gel (PFG) . The complex slug water shutoff methane is the combination of the
MWG and PFG, through the core and core flooding experiments, the conclusion that the technique is excellent performance and suitable for deep water shutoff was drawn. And the technique was successfully put into operation In Kelamayi OilField. The tests in laboratory and in oilfield have shown that
the complex-slug water-shutoff technology has a good future.

Key words: deep zone, water shutoff, water shutoff agent, movable weak gel, complex slug, recovery factor