The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 2020
Filed:
Apr. 23, 2019
China University of Petroleum (East China), Shandong, CN;
China University of Geosciences (Beijing), Beijing, CN;
Science and Technology Research Institute Ltd., Petro China, Beijing, CN;
Caili Dai, Qingdao Shandong, CN;
Mingwei Gao, Qingdao Shandong, CN;
Mingwei Zhao, Qingdao Shandong, CN;
Qing You, Beijing, CN;
Guang Zhao, Qingdao Shandong, CN;
Yining Wu, Qingdao Shandong, CN;
Yongpeng Sun, Qingdao Shandong, CN;
Lin Li, Qingdao Shandong, CN;
Yifei Liu, Qingdao Shandong, CN;
He Liu, Beijing, CN;
Xin Wang, Beijing, CN;
Baoshan Guan, Beijing, CN;
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Shandong, CN;
CHINA UNIVERSITY OF GEOSCIENCES (BEIJING), Beijing, CN;
SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE LTD., PETRO CHINA, Beijing, CN;
Abstract
A CO-sensitive fracturing and displacement fluid contains a surfactant, an auxiliary agent, water, and CO, wherein COis liquid and/or supercritical CO. The CO-sensitive fracturing and displacement fluid provided by the invention does not flow back after completion of fracturing construction, and the gel breaking fluid displacement is carried out after soak for a period of time to improve the tight oil recovery ratio. The CO-sensitive fracturing and displacement fluid exerts the 'one-agent multi-purpose' function of sand carrying, COenergization and oil displacement, surfactant imbibition and oil discharge of a fracturing-displacement system in different development and production stages, and achieves the dual goals of expanding the utilization degree of tight oil and improving the displacement efficiency of the tight oil, which can effectively reduce costs and achieve the goal of unified, highly efficient and green development of oil and gas fields.