7/7/2025, 9:17:47 AM 星期一
交联凝胶+水泥浆复合堵漏技术 在深部盐矿井的应用
作者:
作者单位:

1.北京探矿工程研究所;2.中国神华能源股份有限公司神东煤炭分公司

基金项目:

中国地质调查局地质调查项目(编号:DD 20221722)和自然资源部青年科技人才部门预算项目资助。


Application of crosslinked gel and cement slurry composite leakage sealing technology in deep salt mines
Author:
Affiliation:

1.Beijing institute of exploration engineering;2.Shendong Coal Branch, China Shenhua Energy Company Limited

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    摘要:

    深部盐矿资源勘探与开发过程中频发的钻井液漏失技术难题,其形成机理复杂且堵漏难度显著。在构造应力、地下水溶蚀及工程扰动等多因素作用下,储层及近井地带易发育不同尺度的裂缝网络甚至溶蚀腔体,形成多重渗流通道体系。以河北采卤工程A井为例,在井深2594m出现渗漏,继续钻进4m后演变为涌漏同层的失返性漏失,严重影响钻探工程时效。针对A井漏失问题,本文采用交联凝胶-水泥浆复合堵漏技术,利用交联凝胶隔水性好和交联时间可控等特点,形成网状分割层,为后续水泥浆固结提供有效支撑。两次堵漏作业完成后,A井返浆量达到了正常循环量约80%。该复合堵漏技术有效解决了传统单一堵漏材料适应性不足的瓶颈,为深部含水层恶性漏失问题治理提供了新的解决方案。

    Abstract:

    During the exploration and development of deep salt mineral resources, the frequent technical challenge of drilling fluid loss features complex formation mechanisms and significant sealing difficulties. Under the combined effects of tectonic stress, groundwater dissolution, and engineering disturbances, reservoirs and near-wellbore zones are prone to developing multi-scale fracture networks and even dissolution cavities, forming a multi-channel seepage system. Taking Well A in Hebei brine extraction project as an example: leakage occurred at 2594m depth, which evolved into an unrecoverable loss scenario with simultaneous influx and leakage in the same stratum at 2598m, severely impacting drilling efficiency. To address this leakage issue, this study employs crosslinked cement slurry composite sealing technology. Leveraging the excellent water isolation properties and controllable crosslinking time of the gel, a network-like separation layer was formed to provide effective support for subsequent cement slurry consolidation. After two sealing operations, the returned drilling fluids reached approximately 80% of the normal circulation volume. This composite technology effectively resolves the adaptability limitations of traditional single sealing materials and offers a novel solution for managing severe leakage in deep drilling engineering.

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  • 收稿日期:2025-05-09
  • 最后修改日期:2025-06-13
  • 录用日期:2025-06-13
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