新型吸水膨胀堵漏剂的研发与评价

应春业; 高元宏; 段隆臣; 刘鹏; 汪洪民; 蔡记华

doi:10.3969/j.issn.1001-5620.2017.04.007

新型吸水膨胀堵漏剂的研发与评价

doi: 10.3969/j.issn.1001-5620.2017.04.007

1. 中国地质大学(武汉)工程学院, 武汉 430074;
2. 青海省第二地质矿产勘查院, 西宁 810028

基金项目:

青海省科技厅项目“青海省东昆仑祁漫塔格地区岩心钻探堵漏技术研究”（2015-SF-211）。

详细信息

作者简介:
应春业,1993年生,在读硕士研究生,主要从事钻井液与钻井材料研发方面的工作。电话18086434707;E-mail:cy.ying@cug.edu.cn。

通讯作者:
蔡记华,1978年生,博士,教授。E-mail:catchercai@126.com。

中图分类号: TE282
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出版历程
- 收稿日期: 2017-03-10
- 刊出日期: 2017-07-31

Development and Evaluation of a New Water Swelling Lost Circulation Material

1. School of Engineering, China University of Geosciences, Wuhan, Hubei 430074;
2. Second Geological Mineral Exploration Institute of Qinghai Province, Xining, Qinghai 810028

摘要

摘要: 针对目前膨胀堵漏剂普遍存在包覆材料环保性差、强度低、成本高等问题，研发了一种新型膨胀堵漏剂。该堵漏剂由丙烯酸（AA）、丙烯酰胺（AM）、膨润土、惰性材料（核桃壳、云母、聚丙烯纤维）、N，N-亚甲基双丙烯酰胺、过硫酸钾和亚硫酸氢钠等通过溶液自由基聚合法合成，合成后采用绿色环保的植物胶囊包覆。对堵漏剂的常规性能和堵漏性能进行了综合评价，结果表明，使用15%钠膨润土时，堵漏剂吸水倍数为113、弹性模量达44.6 kPa、抗温达100℃、抗NaCl达15%、抗CaCl₂一般；绿色植物胶囊基本不含重金属成分、环境保护性强，包覆堵漏剂时，常温下8~30 min破碎，70℃下5~17 min破碎，可满足现场可控要求；堵漏剂单独使用可封堵1~2 mm缝板，承压能力达3 MPa；合成时添加20%粗粒径复合惰性材料，可封堵1~4 mm缝板，承压能力达4 MPa；添加20%细粒径复合惰性材料，当堵漏剂加量较大（达4%）时，仍难以封堵1~2 mm缝板；合成后添加惰性材料可极大地提高堵漏剂承压能力（大于5 MPa），同时减少堵漏剂加量（0.3%~0.5%），可封堵1~4 mm缝板；相比国内常规堵漏剂，新型堵漏剂每吨节约成本2 000~4 000元，应用前景良好。
- 吸水膨胀堵漏剂 /
- 绿色植物胶囊 /
- 惰性材料
Abstract: A new swelling lost circulation material (LCM) has been developed to replace LCMs presently in use which have these drawbacks such as polluting clad material, low strength and high cost. The new LCM is synthesized though solution free radical polymerization of acrylic acid (AA), acrylamide (AM), bentonite, inert material (such as walnut shell, mica, and polypropylene fiber), N, N-methylene-bis-acrylamide, potassium persulfate and sodium bisulfite. The synthesized product is cladded with environmentally friendly plant capsule. Evaluation of the LCM developed showed that in a 15% Na-bentonite slurry, the LCM can absorb water of 113 times of its own volume. The elastic modulus of the LCM is 4.46 kPa. The LCM has temperature tolerance of 100℃, NaCl resistance of 15%, and ordinary CaCl₂ resistance. The plant capsule contains no heavy metals, and is quite environmentally friendly. In cladding the LCM, it is shattered for 8-30 min at ambient temperature, and 517 min at 70℃, and the final product will satisfy the need for filed operation. When used alone, the LCM plugs fractures of 1-2 mm in width, and has pressure bearing capacity of 3 MPa. When used in combination with 20% coarse inert particles, it plugs fractures of 1-4 mm in width, and the pressure bearing capacity will be 4 MPa. If 20% fine inert particles are used with the high concentration of LCM (4%, for instance), the compounded LCM is not able to plug fractures of 1-2 mm. When mixed (compounded) with inert particles, the pressure bearing capacity of the compounded LCM can be greatly enhanced (above 5 MPa), and less LCM (0.3%-0.5%) will be needed to plug fractures of 1-4 mm in width. Compared with other conventional lost circulation materials, this new LCM saves drilling cost by RMB 2 000-4 000 per ton, and is of great prospects in field application.
- Water swelling lost circulation material /
- Plant capsule /
- Inert material

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参考文献(12)

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