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一种新型耐高温碳酸盐岩酸压胶凝酸及其应用

王萌,  车明光,  周长林,  李力,  陈伟华,  刘飞

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文章导航 > 钻井液与完井液  > 2020 >  37(5): 670-676
王萌, 车明光, 周长林, 李力, 陈伟华, 刘飞. 一种新型耐高温碳酸盐岩酸压胶凝酸及其应用[J]. 钻井液与完井液, 2020, 37(5): 670-676. doi: 10.3969/j.issn.1001-5620.2020.05.022
引用本文: 王萌, 车明光, 周长林, 李力, 陈伟华, 刘飞. 一种新型耐高温碳酸盐岩酸压胶凝酸及其应用[J]. 钻井液与完井液, 2020, 37(5): 670-676. doi: 10.3969/j.issn.1001-5620.2020.05.022
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WANG Meng, CHE Mingguang, ZHOU Changlin, LI Li, CHEN Weihua, LIU Fei. A Novel Gelled Acid for the Acid Fracturing of the High-Temperature Carbonates and its Application[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(5): 670-676. doi: 10.3969/j.issn.1001-5620.2020.05.022
Citation: WANG Meng, CHE Mingguang, ZHOU Changlin, LI Li, CHEN Weihua, LIU Fei. A Novel Gelled Acid for the Acid Fracturing of the High-Temperature Carbonates and its Application[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(5): 670-676. doi: 10.3969/j.issn.1001-5620.2020.05.022
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一种新型耐高温碳酸盐岩酸压胶凝酸及其应用

doi: 10.3969/j.issn.1001-5620.2020.05.022

  • 1. 中石油勘探开发研究院, 北京 100083;

  • 2. 西南油气田分公司工程技术研究院, 成都 610051

基金项目: 

中国石油天然气股份有限公司2016-2020年重大科技攻关项目“四川盆地深层高温高压含硫气藏储层改造技术研究与应用”（2016E-0609）所属课题“四川高温高压碳酸盐岩储层改造基础与实验研究”（XNS15JS2017-043）

详细信息
    作者简介:

    王萌,高级工程师,博士,1985年生,毕业于中国石油大学(北京)化学技术与工程专业,现在从事油气藏储层改造工作。E-mail:wangmeng85@petrochina.com.cn

  • 中图分类号: TE357.12

A Novel Gelled Acid for the Acid Fracturing of the High-Temperature Carbonates and its Application

  • 1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083;

  • 2. Institute of Engineering Technology, Southwest Oil and Gasfield Company, PetroChina, Chengdu, Sichuan 610051

摘要

    摘要
  • 摘要: 酸压改造是高效开发碳酸盐岩储层油气资源的关键措施，酸压工作液的性能及其与储层的适用性是成功增产的前提。针对现有酸液不能很好满足深层高温储层酸压改造需求的难题，优选研发了一种新型耐高温碳酸盐岩酸压胶凝酸体系，对其进行了综合性能评价和现场试验。性能评价和现场试验结果表明：新型胶凝酸使用的胶凝剂（0.8%）降阻率达68.5%；180℃下缓蚀剂和新型胶凝酸对N80试片的缓蚀率达96.70%和98.03%；新型胶凝酸在180℃和170 s-1连续剪切70 min后黏度保持在23.0 mPa·s；在180℃下老化4 h后，胶凝酸保持均相，未出现沉淀、残渣、分层等现象。新型胶凝酸的酸岩反应速率约为现场在用常规胶凝酸的一半。这些性质有利于降低施工难度和风险，实现深穿透储层，形成更长的酸蚀裂缝，实现深度改造和有效提产。新型胶凝酸在高温碳酸盐岩酸压现场试验中获得了初步成功。该新型胶凝酸能够满足180℃碳酸盐岩酸压改造需求，将进一步推广应用。

     

    Abstract: Acid fracturing is a key measure to the efficient development of oil and gas from carbonate reservoirs. The properties and compatibility of the working fluid used for acid fracturing with the reservoir formations are prerequisite to the succuss of the stimulation job. Acid fluids presently in use cannot well satisfy the requirements of acid fracturing deeply buried high temperature reservoirs, and a new high temperature gelled acid for acid fracturing carbonate formations was thus developed to fill this gap. Performance evaluation and field application of the gelled acid showed that the gelling agent used in the new gelled acid (0.8%) can reduce flow friction by 68.5%. Test on N80 specimen with the corrosion inhibitor used and the gelled acid at 180℃ showed that the rate of corrosion inhibition can be 96.70% and 98.03%, respectively. After being sheared at 180℃ and 170 s-1 for 70 min, the gelled acid still retained a viscosity of 23.0 mPa·s. Aged for 4 h at 180℃, the gelled acid was still homogeneous, showing no precipitation, residue and stratification etc. The rate of reaction of the new gelled acid with rock samples was half the rate of reaction of the conventional gelled acids presently in use with the same rock samples. These properties of the new gelled acid are beneficial to the mitigation of operational difficulties and risks. Using this new gelled acid, deep penetration of the acid fluid into the reservoirs can be achieved, thereby forming longer acid-itched fractures and realizing in-depth stimulation and production enhancement. Early success has been obtained with the new gelled acid in fracturing high temperature carbonate reservoirs; it satisfied the needs of fracturing carbonate reservoirs with temperatures as high as 180℃. The gelled acid was planned to be further applied in more fracturing jobs.

     

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  • 收稿日期:  2020-07-15
  • 刊出日期:  2020-10-28

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