胶体分散凝胶(CDG)用于提高水驱过程的体积扫描效率

Rubén Hernán Castro García, G. Toro, J. E. Muñoz, Lia Margarita Cohen Paternina
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引用次数: 6

摘要

短期和中期油气供应可持续性的可行选择是通过提高采收率工艺(EOR)来提高预期的最终采收率。f .本文的目的是描述2012年ECOPETROL公司哥伦比亚石油研究所(ICP)开发的提高采收率技术的评估方法。该方法包括理论评估、设计(地质分析、工程分析、实验室静态和动态测试以及数值模拟等)、胶体分散凝胶(CDG)注射的现场实施和监测。CDG是一种提高采收率的方法,它包括共注入高分子量聚合物和交联剂,在储层中生成微凝胶。该技术已成为聚合物驱的替代方案。本文介绍了采用该方法在Dina白垩纪油田(Dina)的现场应用,该方法与ECOPETROLS.A公司在哥伦比亚实施的首次化学提高采收率试验相对应。研究结果表明,由于流动性比的改善,体积波及效率提高,产油量增加,产水量减少。根据2011年6月开始的这一试点结果,目前正在评估在迪纳和哥伦比亚其他地区扩大使用CDG技术的可行性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Colloidal dispersion gels (CDG) to improve volumetric sweep efficiency in waterflooding processes
A viable option for the sustainability of hydrocarbon supply in the short and medium term is increasing the expected ultimate oil recovery factor through Enhanced Oil Recovery processes (EOR). f . The purpose of this paper is to describe a methodology to evaluate EOR technologies developed at the Instituto Colombiano del Petroleo (ICP) of ECOPETROL S.A. in 2012. The methodology includes theoretical evaluation, design (geological analysis, engineering analysis, laboratory static and dynamic tests and numerical simulation, among others), field implementation and surveillance of Colloidal Dispersion Gels (CDG) injection. CDG is an EOR method that consists in the co-injection of high molecular weight polymer and a crosslinker, to generate microgels in the reservoir. This technology has become an alternative to polymer flooding. This paper describes a field application in Dina Cretaceos Field (Dina) supported by the proposed methodology, which corresponds to the first chemical enhanced oil recovery pilot implemented in Colombia by ECOPETROL S.A. Results of this study show an increase in volumetric sweep efficiency due the improvement of the mobility ratio, increasing in oil production and decreasing in water production. Based on the results of this pilot, which started in June 2011, the feasibility of expanding the use of CDG technology in Dina and others fields of Colombia is being assessed at present.
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