第34卷第4期 2017年7月
钻井液与
究
井液
DRILLINGFLUID&COMPLETIONFLUID
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
Vol. 34 No. 4 July2017
应春业，高元宏2，段隆臣「，刘鹏2，汪洪民2，蔡记华（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）
应春业，
高元案
技降
YING Chunye.
GAU
materialJj.Dr
摘要
Nac 良势
美韩
中图分类号：
多张滑
4E28
Dt
册描
剂的研发与评价[].钻井液与完并液，2017.34（4】：38-44
al.Development and evaluation of a new water swelling lost circulation
38-44
绿色植物胶囊：情性材料
文献标识码：A
1001-5620（2017）04-0038-07
文章编号：
Development and Evaluation of a New Water Swelling Lost Circulation Material YING Chunye', GAO Yuanhong", DUAN Longchen', LIU Peng', WANG Hongmin', CAI Jihua
(1. School of Engineering, China University of Geosciences, Wiuhan, Hubei 430074;
2. Second Geological Mineral Exploration Institute of Oinghai Province, Xining, Qinghai 810028)
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 °C, NaCI resistance of 15%, and ordinary CaCl, 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 °C, 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
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滑技术研究（2015-SF-211)
第一作者简介：应春业，1993年生，在读颈士研究生，主要从事钻井液与钻并材料研发方面的工作。电话 18086434707 ; E-mail : cy.ying@cug.edu.cn.
通讯作者：募记华，1978年生，博±，教授。E-mail：catchercai@126.com。
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