| 高酸溶纤维堵漏剂的实验研究 |
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| 引用本文： | 陈家旭,李兆丰,邱正松,杨芳,刘亚龙,暴丹. 高酸溶纤维堵漏剂的实验研究[J]. 钻井液与完井液, 2018, 35(5): 41-45. DOI: 10.3969/j.issn.1001-5620.2018.05.008 |
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| 作者姓名： | 陈家旭 李兆丰 邱正松 杨芳 刘亚龙 暴丹 |
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| 作者单位： | 1. 中国石油大学(华东)石油工程学院, 山东青岛 266580; |
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| 基金项目： | 国家重大专项“环保钻井液与防漏堵漏新技术”（2017ZX05032-004-005）、国家自然基金石油化工联合基金“高温高密度高矿化度钻井液流变性的调控机理及新方法”（U1562101）、浙江油田公司科学研究与技术开发项目“荆门探区页岩气井筒稳定性研究及防垮塌钻井液体系评价”（ZJYT-2017-1-10）。 |
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| 摘 要： | 裂缝性储层钻井完井液漏失及其引起的储层损害问题，严重制约裂缝性油气藏的钻探及高效开发。目前现场处理裂缝性储层钻井完井液漏失较常用的方法是桥接堵漏法，纤维是桥接堵漏材料的重要组成部分，但常用的纤维类堵漏材料酸溶性能较差，不能满足裂缝性储层酸化解堵的技术需要。为此，研制了一种高酸溶纤维堵漏剂SDSF，平均直径为10～30 μm，长度为3～12 mm，可根据工程需要调节，酸溶率达95%，抗温能力达150℃，在水基钻井液中分散性良好，耐碱性能优良。基于新型高酸溶纤维堵漏剂SDSF，协同高酸溶颗粒状桥接堵漏材料，实验优化了不同开度楔形裂缝的高酸溶纤维堵漏工作液配方，其承压能力可达10 MPa。高酸溶纤维堵漏技术为解决储层工作液漏失及解堵难题，提供了有效的技术方案。
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| 关 键 词： | 储层钻井完井液 井漏 纤维堵漏技术 高酸溶纤维堵漏剂 封堵机理 |
| 收稿时间： | 2018-06-20 |
Study on Highly Acid Soluble Fibrous Lost Circulation Materials |
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| CHEN Jiaxu,LI Zhaofeng,QIU Zhengsong,YANG Fang,LIU Yalong,BAO Dan. Study on Highly Acid Soluble Fibrous Lost Circulation Materials[J]. Drilling Fluid & Completion Fluid, 2018, 35(5): 41-45. DOI: 10.3969/j.issn.1001-5620.2018.05.008 |
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| Authors: | CHEN Jiaxu LI Zhaofeng QIU Zhengsong YANG Fang LIU Yalong BAO Dan |
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| Affiliation: | 1. School of Petroleum Engineering, China University of Petroleum(East China), Qingdao, Shandong 266580;2. Research Institute of Drilling and Production, Zhejiang Oilfeld, Hangzhou, Zhejiang 310008;3. Department of Peripheral Exploration Project, Zhejiang Oilfeld, Hangzhou, Zhejiang 310008 |
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| Abstract: | Fibers are the main component of bridging lost circulation material (LCM) frequently used in dealing with drilling/drill-in fluid losses into fractured reservoir formations. Fibers commonly used in LCM slurries have low acid solubility, which does not satisfy the needs of acid stimulation of the fractured reservoir. A highly acid soluble fber LCM, SDSF, has been developed to resolve this problem. SDSF has average diameter between 10 μm and 30 μm, lengths between 3 mm and 12 mm, which can be adjusted based on operational requirements. Acid solubility of SDSF is about 95%, and SDSF functions normally at high temperatures up to 150℃. SDSF disperses very well in water base drilling fluids, and is resistant to the attack of bases. Fibrous LCM slurries suitable for controlling mud losses into wedge-shaped fractures of different opening widths were optimized using SDSF and other highly acid soluble particle bridging agents. The maximum pressure bearing capacity of these LCM slurries is 10 MPa. Lost circulation control with highly acid soluble fbrous LCM can be used as an effective technical means of resolving problems such as drill-in fluid losses into reservoir formations and removal of formation block by LCM particles. |
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| Keywords: | Fractured reservoir Lost circulation Mud loss control with fbrous material Highly acid soluble fbrous LCM Mechanisms of plugging |
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