钻采工艺 | 高德利:非常规油气井工程技术若干研究进展

文摘   2024-07-31 06:27   湖北  

作者|高德利

原题|非常规油气井工程技术若干研究进展

来源|天然气工业

小编|小油

这是"油气研究前瞻"的第231篇文章

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全文导读


中国拥有丰富的非常规油气资源,其中页岩气可开采资源量全球第二,仅次于美国。然而,中国的石油和天然气对外依存度逐年攀升,2020年石油对外依存度超过73%,天然气对外依存度也超过43%。为了减少对外部资源的依赖,中国正在加大国内油气资源的勘探开发力度,力求大幅度增加油气储量并提高油气产量。在这个过程中,非常规油气资源的开发问题受到了广泛关注。
北美的“页岩革命”对中国产生了深远的影响。这场技术革命使原本没有开采价值的页岩气、页岩油等非常规油气资源得以经济有效的开发。以水平井为基本特征的复杂结构井与丛式水平井是高效开发非常规、低渗透等难开采油气田的先进井型技术。北美的“页岩革命”主要依赖于这些技术,其关键核心技术包括水平井目标段和丛式井网的优化设计、水平井定向钻井、水平目标井段分级压裂完井以及先进的“井工厂”作业模式等。
“井工厂”是指在同一个井场里集中布置和建设多口甚至一大批相似井(如定向井、水平井等井型),形成以丛式井为基本特征的一个“井工厂”。虽然在井场地面诸多井口之间相距很近,但每口井欲钻达的地下油气藏目标则相互偏离井场较远,从而有效扩大了油气田的开发控制范围。“井工厂”作业模式就是围绕同一井场里众多相似井的建设目标任务,采用标准化的工程装备与技术服务,以流水线方式(批量)实施钻井、完井、压裂等主要工程环节的一种高效作业模式。
针对丛式水平井大型化设计、定向钻井“一趟钻”高效作业、井下电加热开采及煤层气高效开发等非常规油气井工程技术问题,本文简要综述了国内外相关研究进展,并重点介绍了作者团队的相关创新研究成果。这些成果对于推进中国“页岩革命”至关重要,有必要进一步加大相关支持力度。


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HIGHLIGHT图片


图1 山区页岩气均匀布井模型图

图2 传统延伸极限模型与定向钻井延伸极限模型的优化目标图

图3 PDC齿热稳耐磨测试系统(VTL立车)照片

图4 PDC齿破岩能耗分析与齿耐磨性测试图

图5 井下射频加热模拟实验系统图


免责声明:本文仅用于学术交流和传播,不构成投资建议

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