新型可变黏度共聚物压裂液的研制与应用

马收; 邸士莹; 魏玉华; 程时清; 刘明明; 缪立南

doi:10.3969/j.issn.1006-6535.2025.02.018

特种油气藏 >

2025 , Vol. 32 >Issue 2: 137 - 144

DOI: https://doi.org/10.3969/j.issn.1006-6535.2025.02.018

钻采工程

新型可变黏度共聚物压裂液的研制与应用

马收 ,
邸士莹 ,
魏玉华 ,
程时清 ,
刘明明 ,
缪立南

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1.中国石化华东石油工程公司,北京 100101;
2.中国石油大学(北京)石油工程教育部重点实验室,北京 102249;
3.中国石油大庆油田有限责任公司,黑龙江大庆 163458

马收(1973—),男,教授级高级工程师,1994年毕业于大庆石油学院石油工程专业,2014年毕业于西南石油大学石油工程专业,获博士学位,现从事非常规油气藏增产措施研究及现场服务工作。

收稿日期: 2024-05-06

修回日期: 2025-01-09

网络出版日期: 2025-06-16

基金资助

国家自然科学基金“致密油藏注水诱发微裂缝机理反演化方法”(11872073);中国石化石油工程公司项目“可变黏度乳液清洁压裂液体系评价及应用”(SG19-90X)

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Development of new variable viscosity copolymer fracturing fluid and its application

MA Shou ,
DI Shiying ,
WEI Yuhua ,
CHENG Shiqing ,
LIU Mingming ,
MIAO Li′nan

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1. Sinopec East China Petroleum Engineering Company, Beijing 100101, China;
2. Key Laboratory of Petroleum Engineering, China University of Petroleum(Beijing), Beijing 102249, China;
3. PetroChina Daqing Oilfield Co., Ltd., Daqing, Heilongjiang 163458, China

Received date: 2024-05-06

Revised date: 2025-01-09

Online published: 2025-06-16

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摘要

为解决深层页岩气开发时常规压裂液携砂能力差、造缝能力低、变黏度工序复杂等技术难题,结合川南丁山区块深层页岩储层特点及施工需求,研制出单体S1、T1。将一定量的丙烯酰胺、2-丙烯酰胺基十四烷基磺酸钠、单体S1和T1共聚形成共聚物溶液,并对共聚物溶液进行室内性能评价与现场应用。结果表明:共聚物溶液具有较强的变黏作用,在低质量分数(0.005%)时分子呈现单分散性,黏度低,高质量分数(0.500%)时分子通过分子间力形成空间网络结构,弹性强;中高质量分数共聚物溶液具有较强的携砂能力,60 ℃下,在质量分数为1.500%的矿化水溶液中的沉降速度为0.17 cm/min;此外,该共聚物溶液还具有良好的破胶能力和抗盐性能。现场应用表明,新型可实时变黏度共聚物压裂液可实现低黏、中黏、高黏压裂液的实时转换,能够有效提高造缝和携砂能力。该研究可为改善深层页岩气压裂效果提供理论指导和技术支撑。

关键词： 深层页岩气; 可实时变黏压裂液; 共聚物; 携砂性; 破胶性; 抗盐性

本文引用格式

马收 , 邸士莹 , 魏玉华 , 程时清 , 刘明明 , 缪立南 . 新型可变黏度共聚物压裂液的研制与应用[J]. 特种油气藏, 2025 , 32(2) : 137 -144 . DOI: 10.3969/j.issn.1006-6535.2025.02.018

Abstract

A new copolymer solution was developed and its indoor performance evaluation and field application were conducted.Deep shale gas development often saw technical challenges such as poor sand-carrying capacity,low width generation capasity,and complex variable viscosity processes of conventional fracturing fluids.To address these challenges,new mononers S1 and T1 were developed based on the characteristics of deep shale reservoirs in the Dingshan Block of southern Sichuan and according to the requirements of construction.A certain amount of acrylamide,sodium 2-acrylamido-14-alkyl sulfonate,and monomers S1 and T1 were copolymerized to form new copolymer solution.The copolymer solution underwent indoor performance evaluation and field application.The results show that the copolymer solution has a strong viscosifying effect;at a low mass fraction(0.005%),the molecules exhibit monodispersity and low viscosity,while at a high mass fraction(0.500%),the molecules form a spatial network structure through intermolecular forces,demonstrating strong elasticity.The copolymer solution with medium and high mass fractions exhibits good sand-carrying capacity,with a sedimentation velosity of 0.17 cm/min in a 1.500% mineralized water solution at 60 ℃;additionally,it also has good gel-breaking ability and salt resistance.Field applications show that the new real-time variable viscosity copolymer fracturing fluid can effectively switch between low,medium,and high viscosity in real-time,enhancing fracturing and sand-carrying capabilities.This research provides theoretical guidance and technical support for improving deep shale gas fracturing effects.

Key words： deep shale gas; real-time variable viscosity fracturing fluid; copolymer; sand-carrying capacity; gel-breaking ability; salt resistance

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