采出液含水对生产气油比的影响规律

doi:10.7623/syxb201801011

石油学报 ›› 2018, Vol. 39 ›› Issue (1): 116-121,128.DOI: 10.7623/syxb201801011

采出液含水对生产气油比的影响规律

胡绍彬¹, 徐庆龙², 郭玲玲³, 王鹏⁴, 刘少克¹

1. 东北石油大学石油工程学院黑龙江大庆 163318;
2. 中国石油大庆油田有限责任公司勘探开发研究院黑龙江大庆 163412;
3. 东北石油大学计算机与信息技术学院黑龙江大庆 163318;
4. 中国石油塔里木油田公司油气工程研究院新疆库尔勒 841000

收稿日期:2017-02-19 修回日期:2017-10-30 出版日期:2018-01-25 发布日期:2018-03-09
通讯作者: 胡绍彬,男,1975年9月生,2000年获大庆石油学院石油工程专业学士学位,2011年获东北石油大学油气田开发工程专业博士学位,现为东北石油大学石油工程学院副教授,主要从事提高原油采收率研究工作。Email:hsbpaper@163.com
作者简介:胡绍彬,男,1975年9月生,2000年获大庆石油学院石油工程专业学士学位,2011年获东北石油大学油气田开发工程专业博士学位,现为东北石油大学石油工程学院副教授,主要从事提高原油采收率研究工作。Email:hsbpaper@163.com
基金资助:
国家重大科技专项（2016ZX05012-001）、东北石油大学培育基金项目（2017PYYL-02）和提高油气采收率教育部重点实验室开放课题（NEPU-EOR-2014-012）资助。

Influence of water cut of produced liquid on produced gas-oil ratio

Hu Shaobin¹, Xu Qinglong², Guo Lingling³, Wang Peng⁴, Liu Shaoke¹

1. College of Petroleum Engineering, Northeast Petroleum University, Heilongjiang Daqing 163318, China;
2. Exploration and Development Research Institute, PetroChina Daqing Oilfield Limited Company, Heilongjiang Daqing 163412, China;
3. School of Computer and Information Technology, Northeast Petroleum University, Heilongjiang Daqing 163318, China;
4. Oil and Gas Engineering Institute, PetroChina Tarim Oilfield Company, Xinjiang Korla 841000, China

Received:2017-02-19 Revised:2017-10-30 Online:2018-01-25 Published:2018-03-09

摘要/Abstract

摘要： 针对一些开发中后期水驱油田区块生产气油比异常升高的问题，为研究采出液含水对生产气油比的影响规律，采用从油田获取的油、气、水样品，开展了模拟地层流体高压物性测试、水驱油等一系列物理模拟实验。结果表明，在充分搅拌的条件下，模拟地层油的饱和压力和溶解气油比随水的注入而降低，且降低的幅度随含水质量分数的增加而增大。当含水质量分数为60%时，模拟地层油的饱和压力降低5.92%，溶解气油比降低9.78%，溶解气水比为2.065 cm³/g。无搅拌条件下，溶解气水比随水-油接触时间的增加而逐渐增大，注入水与模拟油静置接触约24 h，水中的溶气量达到稳定，表明注入水从注入到产出在地层运移过程中与原油接触可从油相获取气体而成为含气水。模拟采出液在地层条件下的折算溶解气油比随模拟采出液含水率的升高逐渐升高。在出口压力高于饱和压力的岩心驱替实验过程中，当含水率超过95%时，生产气油比随采出液含水率的增大而急剧升高，表明采出液高含水时，采出液含水率的变化对生产气油比具有较大的影响。

关键词: 含水率, 生产气油比, 溶解气油比, 溶解气水比, 采出液

Abstract: Aiming at the abnormal increase of produced gas-oil ratio in water flooding oil blocks at the middle and late development stages, the oil-gas-water samples obtained from oilfield were adopted to implement a series of physical simulation tests including high-pressure physical property test on simulated formation liquid and water flooding oil, so as to make clear the effect law of water cut in produced liquid on produced gas-oil ratio. The results show that under the condition of fully mixing, the saturation pressure and solution gas-oil ratio of simulated reservoir oil will decrease along with water injection, and moreover, the decreasing magnitude will enlarge with the increasing mass fraction of water. When the mass fraction of water reaches 60%, the saturation pressure of the simulated reservoir oil will decrease by 5.92%, the solution gas-oil ratio will decrease by 9.78%, and the solution gas-water ratio is 2.065 cm³/g. Under the stirring-free condition, the solution gas-water ratio is gradually increased over the water-oil contact time. When the injected water and simulated oil keep standing and contacting for about 24 hours, the gas volume dissolved in water will reach stability, showing that the injected water can obtain gas from oil phase and turn into gas-bearing water when the injected water contacts with crude oil during its migration in the formation from injection to production. Under the formation condition, the corrected solution gas-oil ratio of simulated produced liquid rises gradually with the increasing of water cut. During the core flooding test in the condition of outlet pressure higher than saturation pressure, the produced gas-oil ratio rises sharply with the increasing water cut as the water cut is over 95%, proving that the change of water cut has a significant influence on the produced gas-oil ratio when the water cut of produced liquid is already at a relatively high value.

Key words: water cut, produced gas-oil ratio, solution gas-oil ratio, solution gas-water ratio, produced fluids

中图分类号:

TE357

胡绍彬, 徐庆龙, 郭玲玲, 王鹏, 刘少克. 采出液含水对生产气油比的影响规律[J]. 石油学报, 2018, 39(1): 116-121,128.

Hu Shaobin, Xu Qinglong, Guo Lingling, Wang Peng, Liu Shaoke. Influence of water cut of produced liquid on produced gas-oil ratio[J]. Acta Petrolei Sinica, 2018, 39(1): 116-121,128.

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采出液含水对生产气油比的影响规律

Influence of water cut of produced liquid on produced gas-oil ratio

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