M.B. Thomas of Shell Canada Ltd. (patents way to prevent fines migration; Canadian Patent No. 1,312,005)

M.B. Thomas of Shell Canada Ltd. has patented a method for preventing fines migration while producing oil from a formation that contains both volatile and residual hydrocarbons. The method involves injecting an oil-displacing gaseous fluid into the formation from the well at a pressure in excess of formation pressure and at a temperature and in a quantity to vaporize volatile hydrocarbons, to displace volatile hydrocarbons from the part of the formation immediately surrounding the well, and to move the displaced volatile hydrocarbons …