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The novel technology for reservoir stimulation: in situ generation of carbon dioxide for the residual oil recovery
Journal of Petroleum Exploration and Production Technology ( IF 2.2 ) Pub Date : 2021-03-23 , DOI: 10.1007/s13202-021-01121-5
Geylani M. Panahov , Eldar M. Abbasov , Renqi Jiang

The gas and chemical flooding for reservoir stimulation with residual hydrocarbons reserves are highly relevant problem of current oil and gas recovery strategy. The objective of this paper is laboratory study and field implementation of new gas-EOR technology—in situ carbon dioxide generation technique for CO2-liquid slug formation under oil displacement, increasing the reservoir sweep efficiency and residual oil recovery. This paper presents a summary of a wide range of laboratory tests conducted on different core samples and chemical compositions. Several physical and hydrodynamic phenomena of in situ CO2 generation in highly permeable zones of a porous medium have been investigated as a part of complex study, which involved laboratory tests on the field-scale industrial technology applications, determination of optimal concentrations of foaming agents and inhibiting additives in gas-releasing solutions, etc. The results of laboratory experiments showed that the incremental recovery ranged between 30 and 35% oil original in place. The unique results of the field implementation provide developing an optimal technological scheme of reservoir stimulation with residual oil reserves both onshore and offshore oil fields. Technology of in situ CO2 generation was applied on the group of wells on Penglai offshore oil field (Bohai Bay). Incremental oil production for field operation was 37,740 bbl of crude oil. Theoretical and laboratory studies, as well as the outcomes of industrial implementation of a new method of residual oil recovery, using a CO2-slug confirm technology and economic profitability of the proposed solution.



中文翻译:

储层增产的新技术:原位产生二氧化碳以回收剩余油

天然气和化学驱以剩余烃储量增产的方法是当前油气开采策略中高度相关的问题。本文的目的是在实验室研究和现场实施新的气驱EOR技术-原位生成二氧化碳的技术,用于驱油下CO 2-液塞的形成,从而提高油藏的驱油效率和剩余油的采收率。本文总结了对不同核心样品和化学成分进行的各种实验室测试的摘要。原位CO 2的几种物理和流体动力学现象作为复杂研究的一部分,已经研究了在多孔介质的高渗透性区域中产生水的问题,该研究包括对现场规模工业技术应用的实验室测试,确定最佳的发泡剂浓度和抑制气体释放溶液中的添加剂等。实验室实验的结果表明,增加采出量的范围为原始原油的30%至35%。现场实施的独特成果为开发具有陆上和海上油田剩余油储量的储层增产的最佳技术方案提供了条件。原位CO 2技术一代被应用在蓬莱近海油田(渤海湾)的一组油井上。现场作业的增量石油产量为37,740桶原油。理论和实验室研究,以及采用CO 2塞子的残油回收新方法的工业实施成果,证实了所提出解决方案的技术和经济收益。

更新日期:2021-03-23
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