| abstract |
The invention discloses a gel plugging agent for oil field and a preparation method thereof, belonging to the field of oil drilling and oil production engineering. A gel plugging agent for oil field, comprising the following raw materials in parts by weight: 6-15 parts of acrylamide, 2-8 parts of acrylic acid, 1-5 parts of 2-methyl-2-acrylamido propanesulfonic acid, 0.5- 5 parts of dimethyldiallyl ammonium chloride, 0.03 to 1 part of N,N'-methylenebisacrylamide, 30 to 100 parts of water, 1.5 to 8 parts of sodium hydroxide, and 0.01 to 5 parts of an initiator. A preparation method of a gel plugging agent for oil fields, comprising the following steps: S1. preparing a base liquid; S2. polymerizing reaction. The preparation method is simple and convenient, low in equipment cost, economical, and environmentally friendly; the obtained plugging agent has strong plugging ability, and can be used to plug formation pores and cracks of different sizes to prevent foreign fluids from invading the formation. In order to achieve the purpose of maintaining wellbore stability and improving oil recovery. |