石油勘探与开发 >

2020 , Vol. 47 >Issue 6: 1235 - 1243

DOI: https://doi.org/10.11698/PED.2020.06.17

石油工程

基于非共价增强的高耐盐低吸附降阻剂

  • 马应娴 ,
  • 朱智 ,
  • 郭建春 ,
  • 周瀚 ,
  • 李嘉 ,
  • 熊雨佳 ,
  • 马乐瑶
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  • 1.西南石油大学石油与天然气工程学院,成都 610500;
    2.油气藏地质及开发工程国家重点实验室（西南石油大学）,成都 610500;
    3.中国石油集团川庆钻探工程有限公司井下作业公司,成都 610051;
    4.中国石油集团川庆钻探工程有限公司地质勘探开发研究院,成都 610051;
    5.中国石化股份胜利油田分公司胜利采油厂,山东东营 257000
马应娴（1987-）,女,四川西昌人,博士,西南石油大学讲师,主要从事储集层增产改造技术研究。地址：四川省成都市新都区新都大道8号,西南石油大学石油与天然气工程学院,邮政编码：610500。E-mail：mayingxian@swpu.edu.cn

收稿日期: 2019-12-02

  修回日期: 2020-10-15

  网络出版日期: 2020-11-27

基金资助

国家科技重大专项“储集层改造关键流体研发”（2017ZX05023003）; 国家杰出青年科学基金“低渗与致密油气藏压裂酸化”（51525404）

收起

A high salt tolerance and low adsorption drag reducer based on non-covalent enhancement

  • MA Yingxian ,
  • ZHU Zhi ,
  • GUO Jianchun ,
  • ZHOU Han ,
  • LI Jia ,
  • XIONG Yujia ,
  • MA Leyao
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  • 1. Petroleum Engineering School, Southwest Petroleum University, Chengdu 610500, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
    3. Downhole Service Company, CNPC Chuanqing Drilling Engineering Company Limited, Chengdu 610051, China;
    4. Geological Exploration and Development Research Institute, CNPC Chuanqing Drilling Engineering Company Limited, Chengdu 610051, China;
    5. Shengli Oil Production Plant, Sinopec Shengli Oilfield Branch, Dongying 257000, China

Received date: 2019-12-02

  Revised date: 2020-10-15

  Online published: 2020-11-27

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摘要

为降低压裂用滑溜水对储集层的吸附伤害,实现压裂返排液、油田产出水直接配制,提高水资源重复利用率,通过引入极性阳离子结构单元增强链段间非共价作用合成了一种高耐盐低吸附降阻剂。采用红外光谱、核磁共振氢谱对降阻剂进行了结构表征,通过摩阻和增黏性能测试评价了降阻剂的耐盐性能,并采用静态吸附和动态吸附滞留测试评价了其对页岩储集层的伤害。研究表明,阳离子结构单元一定程度上减弱了金属阳离子屏蔽作用,使得降阻剂分子在高矿化度下依然具有稳定的分子结构,能保持降阻性能。极性阳离子片段的引入增强了链段间的非共价相互作用,使得链段自由极性位点减少,减少了降阻剂分子与页岩形成氢键的可能,在高矿化度下该降阻剂在页岩表面的吸附量和对岩心的渗透率伤害率均很低。现场应用表明,与常规耐盐滑溜水体系相比,液体综合成本降低17%,单井产量提升44%,应用效果显著。图10表7参31

关键词： 页岩; 水力压裂; 滑溜水; 降阻剂; 低吸附; 高耐盐

本文引用格式

马应娴 , 朱智 , 郭建春 , 周瀚 , 李嘉 , 熊雨佳 , 马乐瑶 . 基于非共价增强的高耐盐低吸附降阻剂[J]. 石油勘探与开发, 2020 , 47(6) : 1235 -1243 . DOI: 10.11698/PED.2020.06.17

Abstract

To formulate fluids with flowback water, produced water directly to improve the utilization rate of recycling and reduce the adsorption damage of slick water to reservoirs, a high salt tolerance and low adsorption drag reducer was designed and prepared by introducing polar cation fragments to enhance the non-covalent interactions between the chains. The drag reducer was characterized by IR and NMR. Friction resistance and viscosity tests were conducted to evaluate its salt resistance property. Static adsorption and dynamic adsorption retention tests were carried out to evaluate the damage of this reducer to shale reservoirs. The introduction of cation units into the molecular structure can weak the shielding effect of metal cations to some extent, so the drag reducer can keep a stable molecular structure and good resistant reducing performance under high salinity. The enhancement of non-covalent interaction between chains decreased the free polarity sites, further reduced the possibility of hydrogen bonding between drag reducer molecules and shale. In high salinity condition, both the adsorption capacity of the drag reducer on the shale surface and the average damage rate to the core permeability are low. Compared with the conventional salt-tolerant system, the overall liquid cost was reduced by 17% and the production per well increased by 44%. The application of this slick water system has achieved remarkable results.

Key words： shale; hydraulic fracturing; slick water; drag reducer; low adsorption; high salt tolerance

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