A nano desorbent for gas well and a preparation method thereof

By loading ZnO-CuO nanoparticles onto biochar and using environmentally friendly surfactants, a highly efficient nano-desorbent was prepared, solving the problems of low desorption efficiency, agglomeration, and high energy consumption of existing desorbents, and achieving a highly efficient natural gas desorption effect.

CN120961126BActive Publication Date: 2026-04-17LIAONING QIRUI PETROLEUM TECH CO LTD
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Patent Information

Application Number
CN202511312351.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-09-15
Publication Date
2026-04-17
Estimated Expiration
2045-09-15

AI Technical Summary

Technical Problem

Existing desorbents have low desorption efficiency in unconventional natural gas extraction. Traditional alcohol-ether desorbents cannot break the adsorption bonds between gas and rock surface. Nano-metal oxides are prone to agglomeration and have difficulty entering micropores. Biochar is prone to pore blockage and has low loading rate, and also has problems with toxicity and high energy consumption.

Method used

Using specially pretreated biochar as a carrier, a specific ratio of ZnO-CuO nanoparticles are loaded, and an environmentally friendly surfactant is added. Through the synergistic effect of nanosize effect, catalytic electron transfer effect and interfacial tension reduction effect, a highly efficient desorbent is prepared.

Benefits of technology

It significantly improves the desorption efficiency of natural gas, with nanoparticles highly dispersed into micropores, maximizing the pore size and active sites of the carrier, reducing energy consumption and being non-toxic, thus solving the problems of low desorption efficiency, agglomeration and high energy consumption of traditional desorbents.

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Abstract

The present application belongs to the technical field of oil and gas exploitation, and relates to a nano desorption agent for gas well and a preparation method thereof. The desorption agent uses special pretreated biochar as a core carrier, loads specific proportion of bimetallic oxide nanoparticles, and is supplemented with an environmentally friendly surfactant for surface modification. Through the synergistic effect of nano size effect, catalysis / electron transfer effect of metal oxide, physical adsorption and pore transport effect of biochar, and interfacial tension reduction effect of surfactant, the adsorption energy barrier of gas molecules such as methane on the rock surface is significantly reduced, and the efficient desorption is promoted. At the same time, all components and preparation processes are environmentally friendly and harmless to human body.
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