Low-tension thick oil viscosity-reducing oil washing agent for cold production of common thick oil as well as preparation method and application thereof
A sticky oil washing agent and low tension technology, which is applied in the fields of chemical instruments and methods, production fluids, earthwork drilling, etc., can solve problems such as oil washing efficiency that are not mentioned, and achieve enhanced oil recovery, improved appearance, and improved The effect of salt tolerance on the ability to tolerate salinity
Active Publication Date: 2021-07-02
SHANDONG XINGANG CHEM
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Problems solved by technology
Although the viscosity-reducing oil displacement agent in the above-mentioned technology mentions the viscosity-reducing and emulsifying effect on heavy oil, it does not mention the oil washing efficiency. Low tension heavy oil viscosity reducing detergent
Method used
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Embodiment 1
[0056] The 350 kg of water was added to the reactor, the temperature was 60 ° C, adding 50 kg of anhydrous anhydrous sodium carbonate, uniformly dissolved, 300 kg of heterohydrol polyoxyethylene sulfonate (N = 3) and 100 kg of methanol, stir Uniform, finally added 200kg phenolic carboxylate (R 1 = 8, m = 7), stir well to obtain a low tension barrier oil-resistant washing oil.
Embodiment 2
[0058] The 340 kg of water was added to the reactor, and the temperature was 58 ° C, and 60 kg of anhydrous sodium carbonate was added. Stir is evenly mixed, and finally 180 kg of phenolic carboxylate (R) 1 = 9, m = 8), stir evenly to obtain a low tension barrier oil.
Embodiment 3
[0060] The 330 kg of water was added to the reactor, control temperature 56 ° C, add 70 kg of anhydrous sodium carbonate, stirred uniform, then add 340 kg of heterohydrol polyoxyethylene sulfonate (n = 3) and 100 kg isopropion Alcohol, mix well, finally add 160 kg of phenolic carboxylate (R 1 = 10, m = 9), stir evenly to obtain a low tension barrier oil-resistant washing oil.
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Abstract
The invention provides a low-tension thick oil viscosity-reducing oil washing agent for cold production of a common thick oil reservoir as well as a preparation method and application thereof, and belongs to the field of oilfield chemistry. The low-tension thick oil viscosity-reducing oil washing agent comprises the following components in percentage by mass: 30-40% of alcohol ether sulfonate, 10-20% of phenolic ether carboxylate, 5-10% of sodium carbonate, 10% of low-carbon alcohol and the balance of water. When applied to a common thick oil reservoir with formation water mineralization degree of 0-100000mg / L and calcium and magnesium ion concentration of less than or equal to 2000mg / L, the low-tension thick oil viscosity-reducing oil washing agent has the characteristics that the oil washing efficiency is greater than or equal to 81.5%, the viscosity reduction rate is greater than or equal to 98.3%, the oil-water interfacial tension is less than or equal to 3.3 * 10 <-3 > mN / m and the like, and the preparation process is simple, low in cost, green and environment-friendly.
Description
Technical field [0001] The present invention belongs to the field of oilfield chemistry, in particular, to a common heavy oil-tide cold, a low tensionable oil-proof oil, and a preparation method and application thereof. Background technique [0002] The main methods of currently exploiting heavy oil are hot and cold. Thermal mining is mainly divided into steam throughput and steam drive. In the process of steam drive, in order to improve the effect of thermal mining, high-temperature chemical assistance can be added, referred to as steam chemical drive. Cold mining refers to the mining method that does not add hot fluid, mainly with two techniques of adhesive throughput and debris chemistry. [0003] A cold-descending chemical drive technique for common heavy oil reservoirs is to inject heavy oil-filled washing oil solution into the formation, peeled off the crude oil on the formation sand by the oil absorbing function, and reduce the viscosity of the crude oil, easy to crude oil...
Claims
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IPC IPC(8): C09K8/584E21B43/22
CPCC09K8/584E21B43/16
Inventor 姜力华祝东明秦玉斌胡朋朋吴庆凯李金平丁锡刚李慎伟杨姗齐书磊
Owner SHANDONG XINGANG CHEM