Method for preparing volume expansion type granular profile control agent using oil production mud

Abstract

The present invention discloses process of synthesizing expanded granular profile control agent with oil production mud, and the synthesized profile control agent is used in the deep profile control of macroporous oil reservoir. The expanded granular profile control agent is prepared with ternary polymer system of acrylic acid, acrylamide and cross-linking agent and through adding oil production mud, oxidant and reductant in certain weight proportion to produce adiabatic free radical polymerization forming colloid block and subsequent palletizing, stoving and crushing to required granularity. The said process changes the oil production mud into useful resource and the prepared expanded granular profile control agent has the features of heat resistance, salt tolerance, high expanding performance, long stable period, etc.

Description

Technical field

[0001] The invention relates to a preparation method of a bulk-swelling profile control agent for deep profile adjustment of large-pore reservoirs in an oil field. In particular, the preparation method uses oil extraction sludge as the raw material for preparing the profile control agent. Specifically, it is A method for preparing a bulk swelling particle profile control agent using oil extraction sludge. Background technique

[0002] Oil extraction sludge is an industrial waste produced in the production process of oil fields. For the treatment of oil extraction sludge, methods such as landfilling are mainly used, and this method pollutes the environment. At present, the main inorganic fillers used in the production of particle profile control agents are bentonite and kaolin, and the use of oil extraction sludge as the inorganic filler for the production of particle profile control agents is an effective method for harmless treatment and full utilization of oil e...