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发明公开
CN106590613A 用于低渗油气藏的超临界二氧化碳压裂液体系及制备方法 无效 - 驳回

用于低渗油气藏的超临界二氧化碳压裂液体系及制备方法
摘要：
本发明公开了一种用于低渗油气藏的超临界二氧化碳压裂液体系，由基液、增粘剂体系与分散剂组成，其中，所述基液为超临界二氧化碳，所述增粘剂体系包含增粘剂与助溶剂，所述增粘剂为羟基脂肪酸，所述助溶剂为有机溶剂，所述分散剂为含氟表面活性剂。本发明的超临界态二氧化碳压裂液体系使用二氧化碳作为压裂介质，因而几乎保留了二氧化碳压裂技术的所有优点。适用于低渗油气藏压裂施工，有望起到良好的增产效果。本发明所涉及的超临界二氧化碳压裂液体系是一种二氧化碳基压裂液，是非水基压裂液，一方面，降低了对压裂施工过程中对水资源的依赖；另一方面，可以避免地层的水敏伤害。
摘要（英）：

The invention discloses a supercritical carbon dioxide fracturing fluid system for a low-permeability oil and gas reservoir, the supercritical carbon dioxide fracturing fluid system comprises a base liquid, a tackifier system and a dispersant, wherein the base liquid is supercritical carbon dioxide, the tackifier system contains a tackifier and a cosolvent, the tackifier is hydroxy fatty acid, the cosolvent is an organic solvent, and the dispersant is a fluorine-containing surfactant. The supercritical carbon dioxide fracturing fluid system uses the carbon dioxide as a fracturing medium, thereby almost retaining all the advantages of CO2 fracturing technique. The supercritical carbon dioxide fracturing fluid system is suitable for low-permeability oil and gas reservoir fracturing construction and is expected to play a good role in increasing production. The supercritical carbon dioxide fracturing fluid system is a carbon dioxide based fracturing fluid which is a non-water-based fracturing fluid, on the one hand, the dependence on water resources in the process of fracturing construction is reduced; and on the other hand, the water sensitive damage to formation can be avoided.

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