玛湖致密砂砾岩油藏纳米排驱滑溜水体系

何小东; 朱佳威; 石善志; 周福建; 马俊修; 姚二冬

doi:10.3969/j.issn.1001-5620.2019.05.018

玛湖致密砂砾岩油藏纳米排驱滑溜水体系

doi: 10.3969/j.issn.1001-5620.2019.05.018

1. 中国石油新疆油田工程技术研究院, 新疆克拉玛依 834000;
2. 中国石油大学(北京)油气资源与勘察国家重点实验室, 北京 102249;
3. 中国石油大学(北京)非常规油气科学技术研究院, 北京 102249

基金项目:

国家科技重大专项"碳酸盐岩储层难动用储量高效改造关键技术研究"（2016ZX05030005-002）

详细信息

作者简介:
何小东,工程师,1985年生,主要从事非常规油藏储层改造相关工作。E-mail:hexiaodong1@petrochina.com.cn

通讯作者:
姚二冬,博士研究生,2010年毕业于北京大学高分子物理与化学专业,现在从事油气田开发技术研究。电话15201470447

中图分类号: TE357.12
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出版历程
- 收稿日期: 2019-06-03
- 刊出日期: 2019-10-30

Development of Nanofluid Slickwater System for Stimulating Mahu Tight Glutenite Reservoirs

1. CNPC Engineering Technology Research Institute of Oilfield Company, Karamay, Xinjiang 834000;
2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing 102249;
3. Unconventional Petroleum Research Institute·China University of Petroleum(Beijing), Beijing 102249

摘要

摘要: 玛湖油田致密砂砾岩油藏压裂液减阻剂为阴离子聚合物，易于与高矿化度配制水和压裂液添加剂中的有机或者无机阳离子发生反应而形成沉淀，堵塞致密砂砾岩孔隙，造成近井地带压力异常升高，不利于压裂裂缝的进一步延伸。为了实现储层保护、促进裂缝扩展，研究提出了一套具有原位驱油功能的纳米排驱滑溜水体系，结合室内环路摩阻测试和表界面张力测试实验，确定了该体系中各个组成部分的添加比例，并依据玛湖油田现场实验数据和实验材料，对整个纳米排驱剂体系的持续抗剪切能力、耐盐能力、溶解能力和洗油能力进行评价。结果表明，所研发的纳米排驱滑溜水体系在1.2×10⁴s^-1剪切速率下，减阻率为78.92%，且在该剪切速率下，利用玛湖油田不同矿化度配制水所配制的纳米排驱滑溜水体系剪切20 min减阻率依旧保持在73%以上，同时通过使用索氏提取装置测定纳米排驱滑溜水体系对玛湖油田油砂的洗油能力为93.3%。初步筛选出一套适用于玛湖油田砂砾岩油藏的纳米排驱滑溜水体系。
- 纳米排驱滑溜水 /
- 砂砾岩 /
- 减阻率 /
- 洗油能力
Abstract: The drag reducer of fracturing fluid in the tight glutenite reservoir of the Mahu Oilfield is a kind of anionic polymer, which is easily precipitated by the reaction with organic or inorganic positive ions in fracturing additives. The precipitations can easily block the pores of tight glutenite, and cause an abnormal pressure increase in the near-wellbore. It will be not conducive to the further extension of the fracture. In order to realize reservoir protection and promote crack propagation, a nanofluid slick water system with in-situ oil displacement ability was developed. Loop test and surface tension test were used to determine the optimal doses of each components in this system. Based on the field data and materials of Mahu oilfield, continuous shearing resistance, salt tolerance, solvency and wash oil ability of the nanofluid system were evaluated. The results show that, under the shearing rate of 1.2×10⁴s^-1, the drag reduction efficiency of the fluid is 78.92%. In addition, the nanofluid system can work well at the different salinity of the formation water of Mahu oilfield. At the same shearing rate, the drag reduction efficiency after 20 min shearing is still above 73%. What's more, the wash oil efficiency of the system is determined to be 93.3% by the Soxhlet extraction system with Mahu oil sand.
- Nanofluid with slickwater system /
- Glutenite /
- Friction reduction rate /
- Oil sweep efficiency

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参考文献(11)

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