Self-selective plugging and profile control agent based on aged oil and water plugging method
A self-selective, aging oil technology, applied in the direction of chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve problems such as complex components, meet injectability, digestion safety and environmental hazards, reduce Effect of Water Phase Permeability
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Embodiment 1
[0067] The present embodiment provides a self-selective plugging agent, which includes the following components by weight:
[0068] The pre-emulsified water slug includes: 1.0 parts by weight of alkyl glycoside and 150 parts by weight of water.
[0069] The aging oil main slug comprises: 200 parts by weight of dehydrated aging oil with a moisture content of less than 0.5%, 2 parts by weight of sorbitan fatty acid ester, and 0.1 part by weight of hydroxypropyl methylcellulose.
[0070] The emulsification control slug comprises: 15 parts by weight of sodium carboxylate solution and 150 parts by weight of water.
[0071] Wherein, the preparation method of the aging oil main slug is as follows:
[0072] Preheat the designed amount of aging oil to 50°C, add it to the crude oil ultrasonic thermal dehydration device, raise the temperature to 160°C, dehydrate continuously for 3h / time, measure the water content by distillation until the water content is less than 0.5% to obtain dehydr...
Embodiment 2
[0075] The present embodiment provides a self-selective plugging agent, which includes the following components by weight:
[0076] The pre-emulsified water slug comprises: 1.2 parts by weight of phosphate betaine and 160 parts by weight of water.
[0077] The aged oil main slug comprises: 240 parts by weight of dehydrated aged oil with a moisture content of less than 0.5%, 3 parts by weight of a quaternary ammonium salt type gemini surfactant, and 0.2 parts by weight of calcium-based bentonite.
[0078] The emulsification control slug comprises: 16 parts by weight of calcium chloride solution and 160 parts by weight of water.
[0079] Wherein, the preparation method of the aging oil main slug is as follows:
[0080] Preheat the designed amount of aging oil to 40°C, add it to the crude oil ultrasonic thermal dehydration device, raise the temperature to 150°C, dehydrate continuously for 2.5h / time, measure the water content by distillation until the water content is less than 0...
Embodiment 3
[0083] The present embodiment provides a self-selective plugging agent, which includes the following components by weight:
[0084] The pre-emulsified water slug includes: 0.8 parts by weight of phosphate betaine and 170 parts by weight of water.
[0085] The aging oil main slug comprises: 180 parts by weight of dehydrated aging oil with a water content less than 0.5%, 4 parts by weight of sorbitan fatty acid ester, and 0.05 part by weight of hydroxypropyl methylcellulose.
[0086] The emulsification control slug comprises: 20 parts by weight of sodium bicarbonate solution, and 170 parts by weight of water.
[0087] Wherein, the preparation method of the aging oil main slug is as follows:
[0088] Preheat the designed amount of aging oil to 45°C, add it to the crude oil ultrasonic thermal dehydration device, raise the temperature to 155°C, dehydrate continuously for 3h / time, measure the water content by distillation until the water content is less than 0.5% to obtain dehydrat...
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