Title: Screening and performance evaluation of epoxy resin long-term sustained-release solid tracer

Authors: Mingqiang Wei; Yuhong Wang; Yonggang Duan; Yan Li; Yihe Du

Addresses: National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China ' National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China ' National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China ' Sinopec Chongqing Fuling Shale Gas Exploration and Development Co., Ltd., Chongqing, 408000, China ' National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Abstract: This study selects suitable epoxy resin as a sustained-release material. The sustained-release carrier was mixed with different water-soluble tracers to create a solid sustained-release tracer. The material's microstructure, compression performance, and thermal stability were characterised and analysed. Considering the stability and mechanical properties of the prepared solid spline, the single-factor experiment and a dynamic scouring test were carried out using epoxy resin B and a sodium bromide tracer. The single-factor experiment showed that tracer release increased with temperature and dosage and decreased with mineralisation. The highest release of sodium bromide tracer occurred at pH 7. The flow rate experiment indicated a positive correlation between the flow rate and the cumulative release rate of the tracer. The first-order kinetic equation is a dependable approach for elucidating the release phenomenon of the sustained-release solid tracer. The tracers provide a new way to synthesise long-term sustained-release solid tracers. [Received: January 4, 2024; Accepted: March 4, 2024]

Keywords: epoxy resin; sustained-release material; sustained-release tracer; single-factor experiment; the first-order kinetic equation.

DOI: 10.1504/IJOGCT.2024.140282

International Journal of Oil, Gas and Coal Technology, 2024 Vol.36 No.2, pp.170 - 196

Received: 18 Dec 2023
Accepted: 04 Mar 2024
Published online: 01 Aug 2024 *

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