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首页> 外文期刊>Journal of Petroleum and Gas Engineering >Flue gas enhanced oil recovery (EOR) as a high efficient development technology for offshore heavy oil in China
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Flue gas enhanced oil recovery (EOR) as a high efficient development technology for offshore heavy oil in China

机译：烟气强化采油（EOR）作为中国海上重油的高效开发技术

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China Offshore oilfield is rich in heavy oil, M oilfield in Bohai Bay is the most thick heavy oil field in offshore by far with the formation oil viscosity as high as 450 ~ 950 mPa.s. Using conventional oil field development (depletion and water flooding), the heavy oil field exposed its limits, such as low productivity of single well, low production rate and low predicted recovery. As is well known, the development effect of thermal recovery is not only related with the thermal recovery methods (steam stimulation, steam flooding, etc.), but also related with the thermal medium (steam, hot water, flue gas etc.). A new thermal media called multi-thermal fluid, which contains steam, hot water and flue gas was researched for horizontal well stimulation, which is to inject N2and CO2at the same time when injecting steam. This multi-thermal fluid could employ various mechanisms of each fluid, including reducing oil viscosity by heating and dissolving gas, increasing pressure by injecting gas, expanding heating range, reducing heat loss and gas assisting gravity drive etc. With the advantages of single thermal injection, this method made up the disadvantages of single thermal fluid injection and can improve steam stimulation effect in some special formation conditions. In this article, the author first analyzed the characterization of multi-thermal fluid, and then researched its stimulation theory. Based on this theory, the single element of geological data, such as dip angle, permeability, rock compression coefficient, formation thickness, oil viscosity, and injection data, such as injection volume, gas-water-ratio and CO2concentration was analyzed using numerical simulation software. Based on this result, selecting data that make more contribution in incremental oil, production rate, and enhanced oil recovery (EOR) to make sensitivity study to summarize formation that multi-thermal fluid could be applied. Based on the theoretical research, a multi-thermal fluid stimulation pilot test was carried out at M oilfield applying compact thermal recovery equipment. The first cycle of the pilot test showed some optimistic results. Multi-thermal fluid stimulation becomes a new efficient development model for offshore heavy oil, opening up a domestic precedent of thermal development of offshore heavy oil (except shallow sea).
机译：中国海上油田富含稠油，渤海湾M油田是迄今为止海上最稠密的稠油油田，地层油粘度高达450〜950mPa.s。使用常规油田开发（枯竭和注水），重油田暴露出其局限性，例如单井生产率低，生产率低和预计采收率低。众所周知，热回收的发展效果不仅与热回收方法（蒸汽刺激，蒸汽驱等）有关，而且与热介质（蒸汽，热水，烟道气等）有关。为了进行水平井增产，人们研究了一种新的热介质，称为多热流体，它包含蒸汽，热水和烟道气，在注入蒸汽的同时要注入氮气和二氧化碳。这种多热流体可以采用各种流体的各种机制，包括通过加热和溶解气体来降低油的粘度，通过注入气体来增加压力，扩大加热范围，减少热量损失以及气体辅助重力驱动等。具有单次热注入的优势，这种方法弥补了单一热流体注入的缺点，并可以在某些特殊地层条件下提高蒸汽增产效果。在本文中，作者首先分析了多热流体的特征，然后研究了多热流体的激发理论。基于这一理论，使用数值模拟分析了地质数据的单个元素，例如倾角，渗透率，岩石压缩系数，地层厚度，油粘度以​​及注入数据，例如注入量，气水比和CO2浓度。软件。基于此结果，选择对增量石油，生产率和提高采收率（EOR）贡献更大的数据，以进行敏感性研究，以总结可以应用多热流体的地层。在理论研究的基础上，采用紧凑型热采设备在M油田进行了多热流体增产中试。中试的第一个周期显示出一些乐观的结果。多热流体增产成为海上稠油高效开发的新模式，开辟了海上稠油（浅海除外）热力开发的国内先例。

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