低渗透油藏双子表面活性剂分形研究与分子模拟
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摘要
运用改进的分形数据处理方法,对低渗透油藏的微观孔隙结构进行了系统分析,发现低渗透油藏微观孔隙结构的分维值在1—2之间。微观孔隙结构分维值定量描述低渗透油藏微观孔隙复杂程度,是进行低渗透油藏描述的重要参数之一。
通过对分子片分维值的研究,结合分子设计方法,对低渗透油藏开发中所应用的双子表面活性剂进行分析,发现双子表面活性剂连桥基团的分维值应与低渗透油藏微观孔隙结构分维值相匹配。低渗透油藏开发中所用的双子表面活性剂,其连桥基团以小分子链为宜。双子表面活性剂连桥基团的分维值是设计与筛选低渗透油藏表面活性剂的重要参数之一
根据双子表面活性剂连桥基团分维值与低渗透油藏微观孔隙结构分维值相匹配的机理,优化设计新型双子表面活性剂分子结构。对传统双子表面活性剂与新型双子表面活性剂进行分子模拟,新型双子表面活性剂具有更强的降低界面张力的优点和更好的洗油效率。
Based on refined fractal method, it is discovered that the fractal dimensions of the microstructure of low permeability oil reservoirs range from 1 to 2. The fractal dimension of the microstructure is one of the important parameters to characterize low permeability oil reservoirs.
Based on the fractal dimensions of molecular fragments and molecular design, it is discovered that the fractal dimension of the spacer group of a gemini surfactant should match the fractal dimension of the microstructure of the reservoirs. The gemini surfactants act more efficiently onto the rock surface as the spacer groups of the gemini surfactants are less complicated than the rock surface. The relationship between the fractal dimension of the microstructure and the fractal dimension of the spacer group is one of the important principles to design and screen surfactants used in low permeability oil reservoirs.
Based on the rule that the fractal dimension of the spacer group of a gemini surfactant should match the fractal dimension of the microstructure of the reservoirs, a series of originally innovative gemini surfactants have been designed, and their practical synthesis routes have been figured out. The results of the molecular simulation of both conventional and newly-designed gemini surfactants show that new chemicals are more efficient in reducing the surface tension and washing oil.
通过对分子片分维值的研究,结合分子设计方法,对低渗透油藏开发中所应用的双子表面活性剂进行分析,发现双子表面活性剂连桥基团的分维值应与低渗透油藏微观孔隙结构分维值相匹配。低渗透油藏开发中所用的双子表面活性剂,其连桥基团以小分子链为宜。双子表面活性剂连桥基团的分维值是设计与筛选低渗透油藏表面活性剂的重要参数之一
根据双子表面活性剂连桥基团分维值与低渗透油藏微观孔隙结构分维值相匹配的机理,优化设计新型双子表面活性剂分子结构。对传统双子表面活性剂与新型双子表面活性剂进行分子模拟,新型双子表面活性剂具有更强的降低界面张力的优点和更好的洗油效率。
Based on refined fractal method, it is discovered that the fractal dimensions of the microstructure of low permeability oil reservoirs range from 1 to 2. The fractal dimension of the microstructure is one of the important parameters to characterize low permeability oil reservoirs.
Based on the fractal dimensions of molecular fragments and molecular design, it is discovered that the fractal dimension of the spacer group of a gemini surfactant should match the fractal dimension of the microstructure of the reservoirs. The gemini surfactants act more efficiently onto the rock surface as the spacer groups of the gemini surfactants are less complicated than the rock surface. The relationship between the fractal dimension of the microstructure and the fractal dimension of the spacer group is one of the important principles to design and screen surfactants used in low permeability oil reservoirs.
Based on the rule that the fractal dimension of the spacer group of a gemini surfactant should match the fractal dimension of the microstructure of the reservoirs, a series of originally innovative gemini surfactants have been designed, and their practical synthesis routes have been figured out. The results of the molecular simulation of both conventional and newly-designed gemini surfactants show that new chemicals are more efficient in reducing the surface tension and washing oil.
引文
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