一种抗高温抗钙两性离子聚合物分散剂

李斌; 蒋官澄; 贺垠博

doi:10.3969/j.issn.1001-5620.2019.03.007

一种抗高温抗钙两性离子聚合物分散剂

doi: 10.3969/j.issn.1001-5620.2019.03.007

李斌¹,
蒋官澄^2,3,
贺垠博^2,3

1. 中联煤层气有限责任公司, 北京 100015;
2. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249;
3. 中国石油大学(北京)石油工程教育部重点实验室, 北京 102249

基金项目:

国家“十三五”科技重大专项“复杂结构井、丛式井设计与控制新技术”（2017ZX05009-003）；国家自然基金创新研究群体项目“复杂油气井钻井与完井基础研究”（51821092）

详细信息

作者简介:
李斌,高级工程师,1999年毕业于中国石油大学(北京)获学士学位,长期从事非常规油气领域中钻完井技术的研究和应用。E-mail:libin3@cnooc.com.cn

中图分类号: TE254
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出版历程
- 收稿日期: 2019-02-11
- 刊出日期: 2019-06-30

A High Temperature Calcium Resistant Amphoteric Polymer Dispersant

1. China United Coalbed Methane Corporation, Ltd., Beijing 100015;
2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249;
3. MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249

摘要

摘要: 针对聚合物钻井液的抗钙难题，以分散解絮凝为主要思路，使用2-丙烯酰胺基-2-甲基丙磺酸（AMPS）、对苯乙烯基磺酸钠（SSS）和二甲基二烯丙基氯化铵（DMDAAC）为单体合成了一种抗高温抗钙两性离子聚合物分散剂。对影响聚合反应的关键参数进行了优选，最终将单体物质的量比优选为AMPS∶SSS∶DMDAAC=7.5∶0.5∶2，引发剂K₂S₂O₈加量优选为单体总质量的0.4%。单剂评价结果表明，分散剂能够在高钙且高温的环境中有效分散膨润土，具有降低滤失量与低剪切速率黏度的作用。从分散剂的分子构型入手分析了其作用机理。以分散剂为核心，配伍消泡剂与惰性封堵材料，配制了高钙钻井液。
- 分散剂 /
- 水基钻井液 /
- 抗钙聚合物 /
- 两性离子聚合物
Abstract: Calcium contamination presents threats to many polymers used in drilling fluids. Dispersion and deflocculation are generally used to eliminate the detrimental effects of calcium contamination. A high temperature calcium resistant amphoteric polymer dispersant has been developed with 2-acrylamido-2-methylpropane sulfonic acid (AMPS), sodium 4-styrenesulfonate (SSS) and dimethyldiallyl ammonium chloride (DMDAAC). The key factors affecting the polymerization, through optimization, are as follows:molar ratio of the monomers AMPS:SSS:DMDAAC=7.5:0.5:2, percent mass concentration of the initiator K₂S₂O₈ is 0.4%. Laboratory evaluation results show that this dispersant can be used to disperse bentonite in high temperature high calcium water base drilling fluids, and is able to reduce filtration rate and low-shear-rate viscosity. The mechanism of the dispersant was studied by analyzing its molecular structure. A drilling fluid resistant to contamination of high concentration calcium was formulated with the dispersant as the main additive, combined with other additives such as defoamer and inert plugging agents.
- Dispersant /
- Water base drilling fluid /
- Calcium resistant polymer /
- Amphoteric polymer

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参考文献(12)

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