SAND PRODUCTION PREDICTION AND CONTROL IN THE MIDDLE OR LATER PERIOD OF OIL PRODUCING

The sand production is a common problem in the middle or later period of oil well. The reasons for sand production include the decline of formation pressure, the clastic deformation of rock matrix, the breakdown of sand cementing matter and the washout of high speed fluid. The sand production in the middle or later period of oil well is predicted by the rock mechanics testing method and the well testing data analysis method, and is controlled by adopting large diameter casing and high density perforation well completion method. The oil well is brought under control by multiple measures after sand producing.