新型耐盐低伤害压裂稠化剂的研制及应用

钻采工艺 ›› 2022, Vol. 45 ›› Issue (2): 120-124.

新型耐盐低伤害压裂稠化剂的研制及应用

杨传书¹，马英²，何国林³，冯超³，徐术国²，段继男²，李琪 ⁴

1 中国石化石油工程技术研究院 2 中国石化西北油田分公司石油工程监督中心 3 中国石油青海油田分公司采油二厂 4 西安石油大学石油工程学院

出版日期:2022-03-25 发布日期:2022-04-28
作者简介:杨传书（1972-），高级工程师，硕士学位，现在中国石化石油工程技术研究院从事钻井压裂方面的研究。

Research and Application of New Salt-resistant and Low-damage Fracturing Thickener

YANG Chuanshu¹，MA Ying²， HE Guolin³，FENG Chao³，XU Shuguo²，DUAN Jinan²，LI Qi³

1. Sinopec Petroleum Engineering Technology Research Institute, Beijing 100101, China; 2. Engineering Supervision Center, Sinopec NorthWest Oil Field Branch, Luntai, Xinjiang 841600, China; 3. No.2 Oil Production Plant of PetroChina Qinghai Oilfield Company, Haixi, Qinghai 816400,China; 4. School of Petroleum Engineering, Xi’an Petroleum University, Xi’an, Shaanxi 710065, China

Online:2022-03-25 Published:2022-04-28

摘要/Abstract

摘要： 文章以2-丙烯酰胺基-2-甲基丙磺酸、丙烯酰胺、甲基丙烯酰丙基三甲基氯化铵为单体，采用水溶液聚合法制备了丙烯酰胺/2-丙烯酰胺基-2-甲基丙磺酸/甲基丙烯酰丙基三甲基氯化铵三元共聚物稠化剂。研究了三元共聚物稠化剂形成的交联冻胶的耐温耐盐性、携砂性和破胶性能。结果表明，2-丙烯酰胺基-2-甲基丙磺酸：丙烯酰胺：甲基丙烯酰丙基三甲基氯化铵=2:7:1、引发剂加量为0.25%、反应温度50℃、反应时间3.5h，pH值为6～8条件下制备的三元共聚物稠化剂的具有良好的性能。以质量分数0.4%三元共聚物稠化剂为主剂的压裂液在70 000 mg/L矿化度下黏度仍大于100 mPa·s，在温度100℃、返排液条件下黏度仍为146.3 mPa·s。与羟丙基胍胶相比，三元共聚物稠化剂聚合物冻胶中支撑剂的沉降速度更小，破胶液残渣含量更少，对储层的伤害率更低。

关键词: 三元共聚物, 耐温, 耐盐, 残渣含量, 伤害率

Abstract: Using acrylamide (AM), 2-acrylamido-2-methyl-propanesulfon-icacid (AMPS), Methacrylamido propyl trimethyl ammonium chloride (MAPTAC) as raw materials, named as terpolymer thickener, was prepared by aqueous solution polymerization. The temperature-resistant; and salt-tolerant, sand carrying capacity and gel breaking performance of the crosslinked gel formed by terpolymer thickener were studied. The results show that, the terpolymer thickener had good performance at following polymerization reaction, the quality ratio of AMPS/AM/MAPTAC was 2:7:1, the dosage of initiator was 0.25%, the reaction temperature was 50℃, the reaction time was 3.5h, and pH was 6~8. The fracturing fluid with viscosity of 0.4% terpolymer thickener is still greater than 100 mPa·s at 70000 mg/L salinity. In the flow back condition, the viscosity of terpolymer thickener is still 146.3 mPa·s at 100℃. Compared with hydropropyl guar gum, terpolymer thickener polymer gel has lower settling speed of proppant, less residue content of gel breaker and lower damage rate to reservoir.

Key words: terpolymer, temperature-resistant, salt-tolerant, residue content, damage rate

杨传书, 马英, 何国林, 冯超, 徐术国, 段继男, 李琪 . 新型耐盐低伤害压裂稠化剂的研制及应用[J]. 钻采工艺, 2022, 45(2): 120-124.

YANG Chuanshu, MA Ying, HE Guolin , FENG Chao, XU Shuguo, DUAN Jinan, LI Qi. Research and Application of New Salt-resistant and Low-damage Fracturing Thickener[J]. Drilling & Production Technology, 2022, 45(2): 120-124.

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