[1]王先荣,李 超,李 翀.深层砂砾岩油藏注CO2相态变化与吞吐参数优化[J].复杂油气藏,2020,13(04):57-62.[doi:10.16181/j.cnki.fzyqc.2020.04.011]
 WANG Xianrong,LI Chao,LI Chong.Phase behavior and parameters optimization of CO2 huff andpuff in deep glutenite reservoir[J].Complex Hydrocarbon Reservoirs,2020,13(04):57-62.[doi:10.16181/j.cnki.fzyqc.2020.04.011]
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深层砂砾岩油藏注CO2相态变化与吞吐参数优化()
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
13卷
期数:
2020年04期
页码:
57-62
栏目:
油气开发
出版日期:
2020-12-25

文章信息/Info

Title:
Phase behavior and parameters optimization of CO2 huff andpuff in deep glutenite reservoir
作者:
王先荣李 超李 翀
中国石化华东石油工程有限公司科技发展分公司,江苏 南京 210031
Author(s):
WANG XianrongLI ChaoLI Chong
Scientific Development Company of East China Petroleum Engineering Ltd. Company,SINOPEC,Nanjing 210031, China
关键词:
深层砂砾岩油藏相态变化CO2吞吐增产机理参数优化
Keywords:
deep glutenite reservoirphase changeCO2 huff and puff stimulation mechanismparameter optimization
分类号:
TE357.4
DOI:
10.16181/j.cnki.fzyqc.2020.04.011
文献标志码:
A
摘要:
WQN深层砂砾岩油藏存在自然产能低,压裂后稳产期短且产量递减快,注水开发效果差,地层能量亏空大,采出程度低等问题,目前油井多处于低速低效衰竭式开采甚至关停状态。开展了CO2驱室内实验研究和可行性分析。研究表明:注入CO2后能起到增溶膨胀,降黏改善流度比,补充返排所需能量等作用。运用CMG数值模拟技术对注入量、注入速度、焖井时间、返排速度、第二轮注气时机、吞吐周期等工艺参数进行优化。经矿场初步试验,W31井CO2注入量800 t,目前累计增油629.1 t,换油率已达0.79,初步取得了增油效果,为有效挖掘深层砂砾岩油藏剩余油提供了技术支持。
Abstract:
WQN deep glutenite reservoirs have problems such as low natural productivity,short stable production period after fracturing and rapid production decline, poor water injection development effect, large formation energy deficit, and low recovery. At present, the oil wells are mostly in a state of low-speed and low-efficiency depletion production or even shut down. Therefore, CO2 flooding experimental study and feasibility analysis have been carried out to improve the development effect.The research results show that the injection of CO2 can play a role in solubilizing and swelling, reducing viscosity, improving fluidity ratio, and supplementing the energy required for flowback. The CMG numerical simulation is used to optimize the process parameters such as injection volume, injection speed, soak time,flowback speed, gas injection timing for second round, cycle time of huff and puff, and so on.Preliminary pilot tests show that the CO2 injection volume of Well W31 is 800 t,the current cumulative oil increase is 629.1 t,the oil exchange rate is reached 0.79,and the oil increase effect has been achieved,which can provide technical support for the effective exploration of remaining oil in deep glutenite reservoirs.

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备注/Memo

备注/Memo:
收稿日期:2020-06-29 ;改回日期:2020-08-17。
第一作者简介:王先荣(1972—),女,高级工程师,现从事油气增产技术服务。E-mail:375273056@qq.com。
更新日期/Last Update: 2020-12-31