Oil well sand prevention method for heavy oil reservoir

The invention discloses an oil well sand prevention method for a heavy oil reservoir, which is applied to heavy oil exploitation in oil fields. The method comprises the following steps of: preparing, namely pulling a production pipe column out, inserting a sand removal pipe column, exploring a sand surface, removing sand, throwing a ball for pressure tests, and pulling the sand removal pipe column out; pigging, cleaning a pipe, washing a well, and pulling a pigging pipe column out; performing sand prevention construction, namely inserting a sand prevention pipe column for magnetic positioning depth calibration; making the pressure tests qualified; performing seat sealing, and opening a filling channel; filling direct circulation sand carrying liquid and quartz sand; washing hands, lifting the sand prevention pipe column upwards and pulling a hand washing pipe column; and inserting an oil exploitation production pipe column into the whole well. The invention has the advantages that: the method is applied to oil well sand prevention and has the one-time success rate of 100 percent, and a single well can be used for continuous production for more than 600 days.