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Micelle oil displacement agent with oil deposit adaptability

A technology of oil displacement agent and oil displacement agent, which is applied in the field of oil field chemistry, can solve the problems of difficult to obtain oil displacement agent, complex composition of crude oil, large composition changes, etc., and achieve high interface efficiency, good reservoir adaptability, and use concentration low effect

Active Publication Date: 2014-01-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the complex composition of crude oil and large changes in composition, it is not only a lot of work to screen oil displacement agents according to reservoir conditions, but it is often difficult to obtain oil displacement agents with reservoir adaptability. Every time a block is replaced, oil displacement agents need to be rescreened The formulation has become a difficult problem restricting the development of chemical flooding to enhance oil recovery

Method used

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  • Micelle oil displacement agent with oil deposit adaptability
  • Micelle oil displacement agent with oil deposit adaptability
  • Micelle oil displacement agent with oil deposit adaptability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Using Gudong crude oil from Shengli Oilfield to reduce the second-line components, at a temperature of 50-55°C, SO 3 / N 2 The flow rate of the mixed gas flow is 120-160L / h, of which SO 3 The average concentration is 3.0-5.0g / L, after a reaction time of 3-6 hours; add sodium hydroxide for neutralization to obtain petroleum sulfonate. Mix 90 parts of petroleum sulfonate with 30 parts of cetyl polyoxyethylene ether (produced by Shandong Binzhou Chemical Factory), stir and mix evenly, then slowly add 15 parts of octylamine dropwise while stirring, the solution is clear and transparent, then stir While slowly adding 315 parts of water, that is. Designated as SD-1.

[0034] Take 1 part of SD-1, mix it with 100 parts of Gudong Formation Water of Shengli Oilfield, and stir well. Adjust the TEXAS-500 spinning drop interfacial tensiometer to 40°C, put the sample tube filled with the above solution, and after stabilizing for half an hour, add about 1 microliter of Shengli Guda...

Embodiment 2

[0038] Mix 72 parts of sodium dodecylbenzene sulfonate (produced by Zibo Luqian Chemical Factory) with 18 parts of alkanolamides (produced by Sichuan Huayu Co., Ltd.), stir continuously at 40°C, mix well, and then In some cases, add 10 parts of octanol dropwise. After the solution is clear and transparent, add 400 parts of water while stirring to obtain the product. Designated as SD-2.

[0039]Take 1 part of SD-2, and slowly add 199 parts, 99 parts, 66 parts and 32 parts of Gudong formation water of Shengli Oilfield at 25°C while stirring, so that the total concentrations of A, B, and C in the solution are respectively 0.1, 0.2, 0.3, 0.6 wt%. According to the same steps as Example 1, according to the national standard SY / T5370-1999 method, measure the dynamic interfacial tension curve between the system and the crude oil in the east area of ​​Shengli Gudao, the results are shown in figure 2 . As can be seen from the figure, the micellar oil displacement agent can quickly r...

Embodiment 3

[0041] Mix 65 parts of petroleum sulfonate (produced by Shengli Oilfield Zhongsheng International Petrochemical Group Co., Ltd.) with 35 parts of nonylphenol polyvinyl ether (produced by Zhejiang Zanyu Technology Co., Ltd.), stir and mix evenly, and then Slowly add 25 parts of butanol dropwise. After the solution is clear and transparent, slowly add 375 parts of water while stirring to obtain the product.

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Abstract

The invention relates to a micelle oil displacement agent with oil deposit adaptability. The micelle oil displacement agent is composed of a surfactant A, a surfactant B and a targeted substance C, wherein the molecule of the surfactant A at least comprises an electriferous polar hydrophilic group, and a hydrophobic group carbon chain has the length of 8-24, and comprises benzene rings, double bonds or naphthenic bases; the molecule of the surfactant B comprises hydroxy or polyoxyethylene groups, and a hydrophobic group carbon chain has the length of 8-24; and the molecule of the targeted substance C comprises oxygenous polar groups or nitrogenous polar groups. Targeted molecules are solubilized in surfactant swelling micelle, so that the swelling micelle is driven to be directionally absorbed onto an oil / water interface, the surfactants and the targeted molecules are released, and an interface layer is assembled in situ; and the tensile force of the system oil / water interface can be rapidly reduced to be ultra-low, and the use concentration of the surfactants is low, thus the micelle oil displacement agent has the advantages of suitability for oil-phase broad spectrum, good salt resistance and favorable adaptability to stratum mineralized water.

Description

field of invention [0001] The invention relates to a micellar oil displacement agent with reservoir adaptability, in particular to low permeability reservoirs, carbonate reservoirs, conventional sandstone reservoirs, high water-cut stage enhanced recovery, and enhanced recovery after polymer injection The rate belongs to the technical field of oil field chemistry. Background of the invention [0002] As a strategic resource, oil plays an important role in its effective exploitation and utilization. Since oil is a non-renewable resource, with the continuous improvement of productivity, the society's demand for oil has risen sharply, and the chance of rediscovering large reserves of oil reservoirs has decreased, so that the improvement of the recovery rate of developed oil fields has attracted much attention, and technical means have been adopted Enhanced oil recovery has become a necessary production measure with great potential. Many years of research have proposed a varie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C09K8/58E21B43/22
Inventor 李英李德春朱鹏飞
Owner SHANDONG UNIV
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