@@ Most oil fields in China are found in continantal sedimentary basin. In the absence of active aquifer, such fields are developed by water injection at the early development stage.However, serious vertical and lateral heterogeneity in formation has resulted in a rapid increase in the water cut of oil wells. Research Institute of Petroleum Exploration and Development under PetroChina has recently developed a kind of pre-gelled (PG) particles that can swell in water to control water production in high salinity and high temperature reservoirs. Laboratory study and field application results show that those PG particles can improve conformance control of injected water.
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