Chemical assistant for thermal recovery of thick oil and application thereof
A chemical additive and heavy oil thermal recovery technology, applied in the field of heavy oil and ultra-heavy oil reservoir development, can solve problems such as restricting the production of high-viscosity crude oil, and achieve the effects of reducing viscosity, enhancing recovery, and improving fluidity
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Embodiment 1
[0027] specific:
[0028] Component A is a mixture of ammonium bicarbonate, ammonium carbonate and sodium carbonate.
[0029] Component B is a mixture of anionic surfactant sodium alkylbenzene sulfonate and nonionic surfactant alkylaryl polyethoxyethylene sodium sulfonate;
[0030] Component C is n-butanol;
[0031] The molar ratio of heavy oil to chemical additives in an oilfield is 0.5:1. Mix the above component A, component B, component C and water and stir evenly to get the chemical agent for heavy oil heating, wherein the mass percentage of component A is 5%, and the mass percentage of component B The percentage content is 0.5%, the mass percentage content of component C is 1.5%, and the rest is water.
[0032] Example 2
Embodiment 2
[0034] specific:
[0035] Component A is a mixture of sodium bicarbonate and sodium carbonate.
[0036] Component B is a mixture of anionic surfactant sodium lauryl ether sulfate and nonionic surfactant dodecyl trimethylglycine;
[0037] Component C is n-pentanol.
[0038] The molar ratio of heavy oil to chemical additives in an oilfield is 0.5:1. Mix the above component A, component B, component C and water and stir evenly to get the chemical agent for heavy oil heating, wherein the mass fraction of component A is 4%, and the mass percentage of component B is The content is 0.3%, the mass percentage of component C is 1.5%, and the balance is water.
[0039]Example 1-2 Using the steam flooding experimental device to evaluate the prepared thermal recovery chemical additives, take degassed heavy oil in an oil field (reservoir temperature is 50°C) as an example, its viscosity is 19870mPa·s, design 250°C for steam flooding According to the scheme, a constant-rate flooding expe...
Embodiment 1-2
[0040] Example 3
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