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High-temperature-resistant compound oil-displacing agent for thermal recovery of thick oil

A technology of combined oil displacement and thermal recovery of heavy oil, applied in the direction of drilling compositions, chemical instruments and methods, etc.

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the use of sulfonated phenolic resin in the field of heavy oil production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]For Zhongerbei heavy oil in Shengli Oilfield (viscosity at 50°C is 15470mPa.s), the composite oil displacement agent (sulfonated phenoxyacetic acid phenol formaldehyde resin, the mass fraction of sulfur is about 10.8%, and the number average molecular weight is between 40000 and 50000 Between, nonylphenol polyoxyethylene ether sulfate, NPES-428, product of Foshan Kedi Chemical Technology Co., Ltd., the mass ratio of the two is 7:3) to prepare an aqueous solution with a concentration of 0.3%, and use the rotating drop interface A tensiometer was used to measure the interfacial tension of oil and water at 50°C, and the test results are shown in Table 1.

[0034] Weigh 100g of heavy oil, add 50g of 1.5% oil displacing agent solution, stir at 80°C for 5 minutes, and measure the viscosity of the emulsified heavy oil with a Hakke VT550 rotational viscometer (100r / m). The test results are shown in Table 1.

[0035] Weigh a certain amount of heavy oil, petroleum asphalt, and ful...

Embodiment 2

[0037] For Shanjiasi heavy oil in Shengli Oilfield (viscosity at 50°C is 9096mPa.s), the composite oil displacement agent (sulfonated phenol urea formaldehyde resin, the mass fraction of sulfur is about 13.7%, the number average molecular weight is between 15000 and 20000, Sorbitan palmitate, SPAN-40, product of Haian Petrochemical Factory in Jiangsu Province, the mass ratio of the two is 8:2) to prepare an aqueous solution with a concentration of 0.3%, and use a spinning drop interfacial tensiometer to measure its The interfacial tension of oil and water, the test results are shown in Table 1.

[0038] Weigh 100g of heavy oil, add 50g of 1.5% oil displacing agent solution, stir at 80°C for 5 minutes, and measure the viscosity of the emulsified heavy oil with a Hakke VT550 rotational viscometer (100r / m). The test results are shown in Table 1.

[0039] Configure the oil sand according to the method of Example 1, then wash the oil sand with 0.3% oil-displacing agent solution, an...

Embodiment 3

[0041] For Liaohe heavy oil (viscosity at 50°C is 4660mPa.s), the composite oil displacement agent (sulfonated phenol formaldehyde resin, the mass fraction of sulfur is about 7.3%, the number average molecular weight is between 6000 and 8000, coconut oil alkanolamide , 6501, the product of Hubei Xingyinhe Chemical Co., Ltd., the mass ratio of the two is 6:4) to prepare an aqueous solution with a concentration of 0.3%, and measure the oil-water interfacial tension at 50°C with a spinning drop interfacial tensiometer. The test results are shown in Table 1 .

[0042] Weigh 100g of heavy oil, add 50g of 1.5% oil displacing agent solution, stir at 80°C for 5 minutes, and measure the viscosity of the emulsified heavy oil with a Hakke VT550 rotational viscometer (100r / m). The test results are shown in Table 1.

[0043] Configure the oil sand according to the method of Example 1, then wash the oil sand with 0.3% oil-displacing agent solution, and then calculate the oil washing rate by...

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Abstract

The invention relates to a high-temperature-resistant compound oil-displacing agent for thermal recovery of thick oil. The oil-displacing agent is a water solution and comprises the following components in parts by weight: 0.001-20 parts of sodium salt and / or calcium salt of sulfonated phenol formaldehyde resin, 0.001-20 parts of non-ionic surfactant and / or non-ionic-anion surfactant for displacing oil, wherein the number-average molecular weight of the sulfonated phenol formaldehyde resin is 2000-200000; the mass percentage of sulfur in the sulfonated phenol formaldehyde resin is 5-20 percent. The oil-displacing agent has the advantages of no alkali, strong high-temperature resistance, good interfacial property, high viscosity-reducing rate and low cost.

Description

technical field [0001] The invention relates to a composite oil displacement agent for thermal recovery of high temperature resistant heavy oil. Background technique [0002] In recent years, with the increasing demand for oil and the decreasing production of conventional crude oil, the development of heavy oil is deepening year by year. In order to improve heavy oil recovery, steam flooding has become a large-scale industrial application of heavy oil thermal recovery technology at home and abroad. However, the characteristics of domestic heavy oil reservoirs, such as deep burial, high steam injection pressure, low dryness, and wide hot water area, have seriously affected the oil displacement effect of steam flooding. Improve the application effect of steam flooding to achieve the goal of greatly increasing the recovery factor. [0003] The development of steam flooding requires high temperature resistance of the oil displacement agent. The temperature range of the steam s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/592C09K8/588C09K8/584
CPCC09K8/584C09K8/588C09K8/592
Inventor 秦冰黄娟李财富
Owner CHINA PETROLEUM & CHEM CORP
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