Fundamental Studies of Carbon Dioxide Enhanced Oil Recovery (CO2-EOR) in Tight Oil Formations

致密油地层二氧化碳提高采收率 (CO2-EOR) 的基础研究

基本信息

  • 批准号:
    RGPIN-2014-06265
  • 负责人:
  • 金额:
    $ 1.46万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2014
  • 资助国家:
    加拿大
  • 起止时间:
    2014-01-01 至 2015-12-31
  • 项目状态:
    已结题

项目摘要

The Bakken formation has recently become a vital oil resource in Western Canada and the adjacent US states as it has approximately 271 to 503 billion barrels of light oil in place. This oil formation is extremely tight with permeabilities of 0.01 to 1 mD, about 100 times lower than those of typical light oil reservoirs. Most oil reservoirs in this formation are currently under the primary oil recovery process, and the oil production rates are being reduced drastically due to quick pressure depletion. The Bakken’s oil recovery factors are estimated to be as low as 1 to 3%. As a secondary oil recovery process, waterflooding is usually adopted and normally proven to be effective but water is very difficult to inject in large volumes into tight formations. The large water source requirement and high water treatment costs are two major concerns. Alternatively, carbon dioxide-enhanced oil recovery (CO2-EOR) methods can be used as tertiary oil recovery processes because CO2 is much less viscous and, thus, much easier to inject than water. It remains unknown, nevertheless, whether CO2-EOR can be successfully applied as CO2 may breakthrough a tight oil formation much more readily than water. In addition, it needs to be determined when and how water and/or CO2 should be injected so that the light oil recovery in the Bakken formation can be optimized. The primary research objective of the proposed NSERC DG research program is to pursue a comprehensive fundamental understanding and generate new technical knowledge of CO2-EOR in tight oil formations. The following four key research topics will be studied in depth: 1. The mutual and complex interactions between the injected CO2 and the reservoir oil, brine, and tight formation and quantification of their respective effects on CO2-EOR, CO2-induced brine scaling, and reservoir integrity; 2. The light oil-CO2 miscibility development and the major CO2-EOR mechanisms, such as CO2-induced oil-swelling effect, interfacial tension reduction, light-hydrocarbons extraction, and asphaltene precipitation; 3. Application and comparison of the following five water- and CO2-based oil recovery processes in a tight oil formation: continuous waterflooding or miscible CO2 flooding, water-alternating-CO2 (WAG) injection, CO2-alternating-water (GAW) injection, and carbonated water injection. Each process involves one-phase (water/CO2) injection at a time. In this way, the best timing, the optimum slug size and ratio for water and CO2 injections will be identified; and 4. Exploration of a new water- and CO2-based EOR process in a tight and fractured oil formation by co-injecting water and CO2, which is a two-phase (water-CO2) injection. The major purpose is to determine the most appropriate water-gas ratio (WGR) and total injection rate, both of which help to simultaneously control the mobilities of the injected water and CO2 and significantly enhance the light oil recovery in the tight and fractured oil formation. The ultimate goal of this research program is to find the optimum water- and CO2-based EOR technique for applying CO2-EOR projects in tight oil formations in terms of the overall oil recovery rate and factor and the economic and environmental benefits. At present, almost all the oil companies in the Bakken formation are planning to apply various water- and CO2-based flooding processes after the primary oil recovery process. This new NSERC DG research program will provide direct, timely, and strong technical support for conducting more efficient CO2-EOR projects and recovering more light crude oil from the vast oil-rich tight formations. In the long term, the optimum water- and CO2-based EOR technique will also help to preserve Canada’s abundant fresh water and clean air.
巴肯油层最近已成为加拿大西部和美国邻近各州的重要石油资源,因为它的轻质油储量约为2710至5030亿桶。该油层致密,渗透率为0.01~1mD,约为典型轻质油藏渗透率的100倍。该油层的大部分油藏目前处于一次采油工艺,由于压力消耗较快,采油速度正在急剧下降。据估计,巴肯油田的石油采收率低至1%至3%。作为二次采油工艺,注水开发通常被采用,而且通常被证明是有效的,但很难将大量的水注入致密地层。水源需求量大和水处理成本高是两大令人担忧的问题。或者,二氧化碳强化采油(CO2-EOR)方法可以用作三次采油工艺,因为二氧化碳的粘性要小得多,因此比水更容易注入。然而,目前尚不清楚能否成功应用二氧化碳提高采收率,因为二氧化碳可能比水更容易突破致密油层。此外,还需要确定何时以及如何注入水和/或二氧化碳,以便优化巴肯地层的轻质油采收率。拟议的NSERC DG研究计划的主要研究目标是追求全面的基础理解,并产生致密油层中二氧化碳提高采收率的新技术知识。主要研究内容如下:1.注入的CO2与油藏油、卤水、致密地层之间相互复杂的相互作用及其对CO2提高采收率、CO2诱导卤水结垢和储层完整性的影响;2.轻质油-CO2混相的发展及CO2诱导提高原油采收率的主要机理,如CO2诱导油胀效应、界面张力降低、轻烃抽提、沥青质沉淀等;3.连续注水或混相CO2驱、注入水交替CO2(WAG)、注入CO2交替水(GAW)、注入碳酸水驱5种水基和CO2基驱油工艺在致密油层中的应用及对比。每个过程一次只需注入一相(水/二氧化碳)。通过这种方式,将确定注水和二氧化碳的最佳时机、最佳段塞大小和注水比;以及4.在致密裂缝性油层中,通过共注入水和二氧化碳的两相(水-二氧化碳)注入,探索基于水和二氧化碳的三次采油新工艺。主要目的是确定最合适的水气比(WGR)和总注入速度,以同时控制注入水和CO2的流度,显著提高致密裂缝性油层的轻质油采收率。本研究的最终目的是从整体采油速度和采收率因素以及经济效益和环境效益的角度,寻找在致密油层中应用CO2三次采油的最佳水基和CO2基三次采油技术。目前,巴肯油层几乎所有的石油公司都计划在一次采油过程后应用各种基于水和二氧化碳的驱油工艺。这一新的NSERC DG研究计划将为实施更高效的CO2-EOR项目提供直接、及时和强有力的技术支持,并从广阔的富油致密层中开采更多轻质原油。从长远来看,基于水和二氧化碳的最佳提高采收率技术还将有助于保护加拿大丰富的淡水和清洁的空气。

项目成果

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Gu, Yongan其他文献

Characterization of a heavy oil-propane system in the presence or absence of asphaltene precipitation
  • DOI:
    10.1016/j.fluid.2008.10.019
  • 发表时间:
    2009-03-15
  • 期刊:
  • 影响因子:
    2.6
  • 作者:
    Luo, Peng;Gu, Yongan
  • 通讯作者:
    Gu, Yongan
Temperature effects on the phase behaviour, mutual interactions and oil recovery of a light crude oil-CO2 system
  • DOI:
    10.1016/j.fluid.2013.07.006
  • 发表时间:
    2013-10-25
  • 期刊:
  • 影响因子:
    2.6
  • 作者:
    Cao, Meng;Gu, Yongan
  • 通讯作者:
    Gu, Yongan
Soaking effect on miscible CO2 flooding in a tight sandstone formation
  • DOI:
    10.1016/j.fuel.2014.06.024
  • 发表时间:
    2014-10-15
  • 期刊:
  • 影响因子:
    7.4
  • 作者:
    Li, Zeya;Gu, Yongan
  • 通讯作者:
    Gu, Yongan
Physicochemical Characterization of Produced Oils and Gases in Immiscible and Miscible CO2 Flooding Processes
  • DOI:
    10.1021/ef301407k
  • 发表时间:
    2013-01-01
  • 期刊:
  • 影响因子:
    5.3
  • 作者:
    Cao, Meng;Gu, Yongan
  • 通讯作者:
    Gu, Yongan
A parabolic solvent chamber model for simulating the solvent vapor extraction (VAPEX) heavy oil recovery process

Gu, Yongan的其他文献

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{{ truncateString('Gu, Yongan', 18)}}的其他基金

Nanoparticle-assisted enhanced oil recovery (Nano-EOR) in unconventional oil reservoirs
非常规油藏纳米粒子辅助提高采收率(Nano-EOR)
  • 批准号:
    RGPIN-2019-05564
  • 财政年份:
    2022
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Nanoparticle-assisted enhanced oil recovery (Nano-EOR) in unconventional oil reservoirs
非常规油藏纳米粒子辅助提高采收率(Nano-EOR)
  • 批准号:
    RGPIN-2019-05564
  • 财政年份:
    2021
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Nanoparticle-assisted enhanced oil recovery (Nano-EOR) in unconventional oil reservoirs
非常规油藏纳米粒子辅助提高采收率(Nano-EOR)
  • 批准号:
    RGPIN-2019-05564
  • 财政年份:
    2020
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Nanoparticle-assisted enhanced oil recovery (Nano-EOR) in unconventional oil reservoirs
非常规油藏纳米粒子辅助提高采收率(Nano-EOR)
  • 批准号:
    RGPIN-2019-05564
  • 财政年份:
    2019
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Fundamental Studies of Carbon Dioxide Enhanced Oil Recovery (CO2-EOR) in Tight Oil Formations
致密油地层二氧化碳提高采收率 (CO2-EOR) 的基础研究
  • 批准号:
    RGPIN-2014-06265
  • 财政年份:
    2018
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Fundamental Studies of Carbon Dioxide Enhanced Oil Recovery (CO2-EOR) in Tight Oil Formations
致密油地层二氧化碳提高采收率 (CO2-EOR) 的基础研究
  • 批准号:
    RGPIN-2014-06265
  • 财政年份:
    2017
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Fundamental Studies of Carbon Dioxide Enhanced Oil Recovery (CO2-EOR) in Tight Oil Formations
致密油地层二氧化碳提高采收率 (CO2-EOR) 的基础研究
  • 批准号:
    RGPIN-2014-06265
  • 财政年份:
    2016
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Fundamental Studies of Carbon Dioxide Enhanced Oil Recovery (CO2-EOR) in Tight Oil Formations
致密油地层二氧化碳提高采收率 (CO2-EOR) 的基础研究
  • 批准号:
    RGPIN-2014-06265
  • 财政年份:
    2015
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Effects of capillary force, wettability and interfacial phenomena on fluid flow in porous media
毛细管力、润湿性和界面现象对多孔介质中流体流动的影响
  • 批准号:
    227545-2000
  • 财政年份:
    2002
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Effects of capillary force, wettability and interfacial phenomena on fluid flow in porous media
毛细管力、润湿性和界面现象对多孔介质中流体流动的影响
  • 批准号:
    227545-2000
  • 财政年份:
    2001
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual

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