羌塘盆地油气地质调查井地层条件与施工难点
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作者单位:

1.四川省第七地质大队,四川 乐山 614000;2.西藏自治区地质矿产勘查开发局第六地质大队,西藏 拉萨 851400

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P634.5

基金项目:

四川省地质矿产勘查开发局2025年度科技项目(编号:SCDZ-KJXM202509);西藏自治区重点研发计划项目(编号:XZ202403ZY0040)


Stratigraphic conditions and construction difficulties of oil and gas geological survey wells in Qiangtang Basin
Author:
Affiliation:

1.The 7th Geological Brigade of Sichuan, Leshan Sichuan 614000, China;2.The 6th Geological Brigade of the Xizang Autonomous Region Bureau of Geology and Mineral Exploration and Development, Lhasa Xizang 851400, China

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    摘要:

    羌塘盆地油气资源勘查工作力度不大,存在大量空白区域有待进一步探索。地质调查井是羌塘盆地油气资源调查研究的重要工程手段,主要采用绳索取心钻进工艺获取全孔段高质量岩心与测井通道,在10余年间已逐渐替代提钻取心钻进工艺。羌塘盆地地理位置与气候条件特殊,地层条件复杂,绳索取心钻进工艺在该区域应用遇到了许多施工难点。笔者结合岩性测试数据和地层应力条件,分析阐明绳索取心钻进工艺与全面钻进工艺在井身结构、钻进参数、钻井液、堵漏堵涌等方面存在显著差异,相关参数指标与实践经验无法简单照搬。同时,整理羌塘盆地多年地质调查井典型问题,围绕绳索取心钻进工艺井壁稳定、钻井液、涌水漏失、工程实施等方面进行详细阐述分析,可为今后该区域地质调查井设计与施工提供重要参考。

    Abstract:

    The exploration intensity of oil and gas resources in the Qiangtang Basin is not high, and a large number of blank areas need further exploration. Geological survey wells are an important engineering tool for the investigation and research of oil and gas resources in the Qiangtang Basin. Wireline core drilling technology is commonly used to obtain the high quality in-situ cores and logging channels for the entire borehole, which has gradually replaced the conventional core drilling technology over the past decade. The Qiangtang Basin has a unique geographical location and climatic conditions, with complex geological conditions. The application of wireline coring drilling technology in this area has encountered many construction difficulties. This paper combines the lithological testing data and geological stress conditions to analyze and clarify that the wireline coring drilling process and the non-coring oil and gas drilling process are significantly different in terms of well configuration, drilling parameters, drilling fluid, plugging and surging, thus relevant parameter indicators and practical experience cannot be simply copied. At the same time, typical problems of geological survey wells in the Qiangtang Basin over the years were sorted out and analyzed in detail, aspects such as wellbore stability, drilling fluid, drilling leakage, and engineering implementation are elaborated, which can provide important references for the design and operation of geological survey wells in the region.

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引用本文

王志祥,陈冲,郭如伦,等.羌塘盆地油气地质调查井地层条件与施工难点[J].钻探工程,2025,52(4):111-120.
WANG Zhixiang, CHEN Chong, GUO Rulun, et al. Stratigraphic conditions and construction difficulties of oil and gas geological survey wells in Qiangtang Basin[J]. Drilling Engineering, 2025,52(4):111-120.

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  • 收稿日期:2024-10-09
  • 最后修改日期:2024-12-18
  • 录用日期:2025-01-22
  • 在线发布日期: 2025-07-04
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