三维建模的断层封堵性评价技术在CCS/CCUS中的应用

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关键词：CCS/CCUS，断层封堵性，三维建模，SGR，断层渗透率，断层传导率 中图分类号：P631 文献标识码：A DOI：10.13810/j.cnki.issn.1000-7210.20250251

Abstract： CCS/CCUS technologies are essential for achieving zero and even negative carbon emissions，and fault sealing is a critical factor determining the effectiveness and safety of CO2 storage. Predominantly relying on the shale gouge ratio （SGR）on both sides ofa fault for evaluating fault sealing，traditional methods are highly dependent on welldata and feature oversimplified evaluation parameters， which results in low evaluation accuracy in areas with limited CCS/CCUS exploration data and thus fails-to meet practical requirements.The method can be optimized from the following aspects：to solve the above-mentioned problems. ① High-precision 3D modeling integrated with welland seismicdata is carred out to characterize the heterogeneity offault zones.As a result，this can solve the problem that traditional methods are dificult to apply to areas with few or no wels， and establish a framework for3D sealing evaluation，improving the vertical evaluation accuracy from the 10-me. ter scale to the meter scale. ② A method for faultpermeability （Kf） calculation isimproved，and a model for fault transmissibility（TM） evaluation is introduced，thereby eliminating the influence of maximum burial depths and burial depths atthe time offormation，and advancing the transformation from 2Dfault planes to 3Dfault bodies. Field application results show that compared with traditional methods，the proposed evaluation method improves the average accuracy of shale thickness by 20% . It has supported the implementation of a 127.5km2CCS storage geological body in Well SQ3 of the Zhundong area，with the key factors causing CO2 gas channeling in the H pilot test area identified. Additionally，the early warning accuracy is over 90% ，which helps reduce the incidence of gas channeling and provides strong technical support for CCS/CCUS safety.

Keywords： CCS/CCUS， fault sealing，3D modelling，SGR，fault permeability， fault transmissibility 周东言，张稳，王晓辉，等。（剩余17538字）