Page 196 - 《精细化工》2022年第3期

第 39 卷第 3 期 精 细 化 工 Vol.39, No.3
2022 年 3 月 FINE CHEMICALS Mar. 2022

油田化学品与油品添加剂
一种长封固段固井用缓凝剂的制备及性能评价

3
4
左天鹏 1,2 ，程小伟 1,2* ，吴 昊 ，刘 芃 1,2 ，张春梅 1,2 ，黄 盛
（1. 西南石油大学 新能源与材料学院，四川 成都 610500；2. 西南石油大学 油气藏地质及开发工程国
家重点实验室，四川 成都 610500；3. 中国石油西南油气田分公司勘探事业部工程技术科，四川 成都
610000；4. 西南石油大学 石油与天然气工程学院，四川 成都 610500）

摘要：通过硼酸与共沉淀法制备的镁铝型层状双氢氧化物（Mg/Al-CO 3 -LDH）进行离子交换反应合成了一种层
状复合缓凝剂——硼酸根插层水滑石（Mg/Al-BA-LDH）。采用 XRD、FTIR、SEM 对其结构进行了表征。评价
了其用量对水泥浆体系综合性能的影响。结果表明，制备的 Mg/Al-BA-LDH 结晶度较好，在 pH=4.5 下其层间
距最大，为 0.92 nm。Mg/Al-BA-LDH 在 90~170 ℃下能有效调节水泥浆稠化时间，其稠化曲线平稳且呈直角稠
化。含 Mg/Al-BA-LDH 的水泥石 24 h 低温抗压强度大于 14 MPa，掺量为 0.5%（以水泥质量为基准，下同）时，
7 d 强度可达 33.97 MPa。在不同温差条件下养护后，顶部水泥石抗压强度正常发展，满足长封固段固井施工要
求，Mg/Al-BA-LDH 的填充效应以及晶体效应在水泥水化后期起主导作用，促进水泥的水化，有效缓解了因缓
凝作用而导致的浆体抗压强度下降。
关键词：长封固段；大温差；水滑石；固井；缓凝剂；油品添加剂
中图分类号：TE256 文献标识码：A 文章编号：1003-5214 (2022) 03-0618-09

Preparation and performance evaluation of a kind of

retarder used in long cementing interval

1,2
1,2
3
ZUO Tianpeng , CHENG Xiaowei 1,2* , WU Hao , LIU Peng ,
1,2
4
ZHANG Chunmei , HUANG Sheng
(1. School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, Sichuan, China; 2. State Key
Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan,
China; 3. Engineering Technology Section, Exploration Division, PetroChina Southwest Oil and Gas Field Branch, Chengdu
610000, Sichuan, China; 4. School of Oil and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500,
Sichuan, China)
Abstract: A kind of layered composite retarder, borate-intercalated hydrotalcite (Mg/Al-BA-LDH) was
synthesized by ion exchange reaction between boric acid and magnesium-aluminum lamellar dihydroxide
(Mg/Al-CO 3-LDH) prepared by coprecipitation method. Mg/Al-BA-LDH was characterized by XRD, FTIR
and SEM and its dosage on the comprehensive performance of the cement slurry system was evaluated. The
results showed that the prepared Mg/Al-BA-LDH had a good crystalline with an interlayer spacing of 0.92 nm
at pH=4.5. The Mg/Al-BA-LDH retarder could effectively adjust the thickening time of cement slurry at
90~170 ℃. The thickening curve was stable, indicating right-angle thickening. The compressive strength of
cement stone sample containing Mg/Al-BA-LDH was greater than 14 MPa at low temperature for 24 h. The,
strength of the sample with a dosage of 0.5% (based on the mass of cement, the same below) reached 33.97 MPa
after 7 d. After curing under different temperature difference conditions, the compressive strength of the top
cement stone samples developed normally and met the construction requirements, which could be applied to
long cementing and large temperature range cementing operation. The filling of Mg/Al-BA-LDH and the
crystal effect played a leading role in the process of cement hydration, thus promoting cement hydration and
effectively alleviating the slurry compressive strength decline caused by retarding effect.

收稿日期：2021-07-11; 定用日期：2021-12-03; DOI: 10.13550/j.jxhg.20210707
基金项目：四川省区域创新合作项目（2021YFQ0045）；油气藏地质及开发工程国家重点实验室（西南石油大学）资助项目（PLN2020-17）
作者简介：左天鹏（1995—），男，硕士生，E-mail：1272411989@qq.com。联系人：程小伟（1977—），男，教授，博士生导师，E-mail：
chengxw@swpu.edu.cn。