中国石油长庆油田建成百万吨级大斜度井规模开发区

中国经济新闻网12-05 10:13

中国经济时报记者张一鸣截至11月28日，中国石油长庆油田在甘肃陇东地区累计实施大斜度井1720口，平均日产油3.2吨，年产油量超80万吨。这标志着长庆油田成功建成了中国石油首个百万吨级大斜度井规模开发区，为国内同类多薄层致密油的效益开发提供了可复制、可推广的技术新范式。长庆油田在甘肃陇东地区开发的华庆、西峰油田作为增储上产的重要阵地，本世纪初便全面开启大规模开发征程。然而，随着开发的不断深入，...

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张一鸣截至11月28日，中国石油长庆油田在甘肃陇东地区累计实施大斜度井1720口，平均日产油3.2吨，年产油量超80万吨。这标志着长庆油田成功建成了中国石油首个百万吨级大斜度井规模开发区，为国内同类多薄层致密油的效益开发提供了可复制、可推广的技术新范式。长庆油田在甘肃陇东地区开发的华庆、西峰油田作为增储上产的重要阵地，本世纪初便全面开启大规模开发征程。然而，随着开发的不断深入，建产对象逐渐由优质的主砂带资源转向储层更为致密、复杂的砂体边部区域。面对这片蕴含丰富资源却又难以有效动用的致密油藏，开发一度陷入瓶颈。“早期我们主要采用常规定向井，但单井产量低、经济效益差。尝试采用水平井技术，又因为油层多且薄，纵向储量动用程度很不理想，就像用高射炮打蚊子，有劲使不对地方。” 长庆油田勘探开发研究院刘建表示。转机始于2019年。长庆油田的技术团队转变思路、迎难而上，决心从困局中找突破口。通过加大三维地震等先进技术的应用力度，创新性地融合地质、物探、测井等多学科信息，形成了精准的甜点评价技术体系。“我们就像是给地下油藏做CT扫描和病理分析。”刘建告诉记者，正是通过多学科一体化研究，长庆油田相继在华庆、西峰地区圈定了一批此前被忽视的建产有利区。明确目标区后，技术团队没有止步。技术人员不断总结、优化同类油藏的开发经验，经过反复论证与实践，最终探索并固化了一套行之有效的开发模式——“大斜度井+五点井网+超前注水”。大斜度井以其井斜角大、穿越油层段长的特点，完美适配了陇东多薄层油藏的地质特征，实现了“精准穿透”与“广域覆盖”的平衡。精细地质研究是加速技术落地的根基。为此，长庆油田进一步深入剖析纵向上多个油层间的物性与含油性差异，精准刻画隔夹层的厚度及空间展布特征。基于这些精细认识，并结合油藏整体物性、纵向单层差异性、储隔层间应力差等核心参数，实现多个主力层段同步、高效动用。同时，加大压裂技术的创新应用，深化储层品质和工程品质“双甜点”评价，以“纵向多级、井间成网”的储层改造为目标，形成以“水力喷孔、精细多段、干扰压裂”为核心的大斜度井多层多段压裂模式，实现对储层的最大化、立体化改造，纵向储量动用程度从以往难以突破的水平跃升至80%以上，为致密油高效开发奠定了坚实的技术基础。","kind":"news","is_publish_news":true,"is_publish_highlight":false,"is_publish_live":false,"is_publish_wemedia":null,"editions":null,"column":"","sentiment":"1","news_tag":"dataReport","news_rank":0,"symbols":[],"gpt_button":1,"need_auth":false,"code":"91000000","status":"200"},"commentList":[],"isCommentEnd":true,"newsSizeData":{"likeSize":0,"commentSize":0,"repostSize":0,"favoriteSize":0,"likeStatus":false,"favoriteStatus":false},"APP":{"userAgent":"Mozilla/5.0 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