| 海域天然气水合物浅软地层水平井钻井液技术 |
| 投稿时间：2022-01-25 修订日期：2022-02-25 点此下载全文 |
| 引用本文：侯岳,刘春生,刘聃,等.海域天然气水合物浅软地层水平井钻井液技术[J].钻探工程,2022,49(2):16-21.HOU Yue,LIU Chunsheng,LIU Dan,et al. Drilling fluid technology for natural gas hydrate horizontal wells in marine shallow soft formation[J]. Drilling Engineering, 2022,49(2):16-21. |
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| 中文摘要:近年来，随着海域天然气水合物的勘探不断深入，为了进一步提高产量，加快实现海域天然气水合物商业化开采步伐，水平井开发成为了增产的重要手段。然而浅软地层水平井施工过程中，面对浅软未成岩地层，重点要解决好大斜度井段和水平井段的井眼清洁、井壁稳定、流变性能控制，润滑降摩、防漏等关键技术。本文从浅软地层水平井钻井液技术难点出发，通过室内研究和现场试验，形成了一套满足浅软地层水平井钻井施工的钻井液体系和钻井液施工工艺，并在陆地进行了多口浅软地层水平试验井施工，确保了钻完井顺利实施，为我国海域天然气水合物水平井试采提供了大量的现场试验数据。 |
| 中文关键词:浅软地层 水平井 井壁稳定 井眼清洁 润滑性 海域天然气水合物 |
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| Drilling fluid technology for natural gas hydrate horizontal wells in marine shallow soft formation |
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| Abstract:In recent years， with rolling out of marine natural gas hydrate exploration， in order to further increase the production and accelerate the pace of commercial exploitation of marine natural gas hydrate， the development of horizontal wells has become an important means for increasing production. However， in horizontal well drilling in shallow soft formation where shallow soft digenetic formation is present， the key technologies for borehole cleaning， wellbore stability， rheological property control， lubrication， friction reduction and leakage prevention in highly deviated well sections and horizontal well sections should be solved. In view of the technical difficulties on drilling fluid for horizontal wells in shallow soft formation， indoor research and field test were conducted to form a set of drilling fluid system and drilling fluid drilling process for horizontal well drilling in shallow soft formation， and several horizontal test wells were drilled in shallow soft formation on land to ensure the smooth well drilling and completion， which provides a large number of field test data for trial production of marine gas hydrate horizontal wells in China. |
| keywords:shallow soft formation horizontal well borehole stability borehole cleaning lubrication marine natural gas hydrate |
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