轻质烃组分的低温密闭抽提技术及其在页岩油资源评价中的应用

摘要/Abstract

摘要： 岩石中小分子烃类的抽提、浓缩技术难点在于小分子烃类极易挥发，需要改进有机试剂，并在低温封闭的体系中进行萃取和浓缩。改进了传统的索式抽提和常规试剂抽提技术，完善了以一氟三氯甲烷作为萃取剂的岩石低温蒸馏、浓缩抽提及色谱分离的实验技术，其收获的C7+轻质烃组分已达到了相关的实验技术标准。依托此技术建立了东营凹陷沙三段、沙四段暗色泥岩氯仿沥的轻烃恢复系数随深度的演化关系，完成了工区页岩油滞留烃的定量评价。低沸点的低温密闭抽提技术，不仅有助于提高岩石中小分子烃类的获取率，而且可以在非常规页岩油气以及高演化阶段油气勘探领域中发挥积极的作用。岩石中小分子烃类的抽提、浓缩技术难点在于小分子烃类极易挥发，需要改进有机试剂，并在低温封闭的体系中进行萃取和浓缩。改进了传统的索式抽提和常规试剂抽提技术，完善了以一氟三氯甲烷作为萃取剂的岩石低温蒸馏、浓缩抽提及色谱分离的实验技术，其收获的C7+轻质烃组分已达到了相关的实验技术标准。依托此技术建立了东营凹陷沙三段、沙四段暗色泥岩氯仿沥青的轻烃恢复系数随深度的演化关系，完成了工区页岩油滞留烃的定量评价。低沸点的低温密闭抽提技术，不仅有助于提高岩石中小分子烃类的获取率，而且可以在非常规页岩油气以及高演化阶段油气勘探领域中发挥积极的作用。

关键词: 轻质烃；密闭抽提；恢复系数；页岩油, 资源评价

Abstract: It is difficult to extract and condense light hydrocarbons from shale rock owing to their volatility. Organic reagent should be improved so that light hydrocarbons can be extracted and condensed under the low-temperature and closed environment. The soxhlet apparatus and conventional chloroform extraction technology is improved while the experiment technology of rock low-temperature evaporation, condensation, extraction and chromatographic fractionation using chlorofluoromethane as extraction agent is perfected. As a result, the acquired C7+ light hydrocarbon reaches the related technical standards. The evolution relationship for light hydrocarbon correction of chloroform bitumen "A"extracted from the lower Es3 and upper Es4 shale rock in Dongying depression is established by means of the above-stated technology, thus completing quantitative evaluation of the remaining hydrocarbon in shale oil in this area. The low-temperature closed extraction technology not only helps improve acquisition rate of light hydrocarbons from rock but also plays an active role in non-conventional shale oil and gas exploration under high evolution stage.

中图分类号:

王娟. 轻质烃组分的低温密闭抽提技术及其在页岩油资源评价中的应用[J]. 中国石油勘探, 2015, 20(3): 58-63.

Wang Juan. Low-temperature Closed Extraction Technology of Light Hydrocarbons and Its Application in Evaluation of Shale Oil Resource[J]. China Petroleum Exploration, 2015, 20(3): 58-63.

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