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天然气地球科学

• 天然气勘探 • 上一篇    下一篇

高温高压条件下不同气体组分储层岩电实验及应用

何胜林，张海荣，杨冬，吴一雄，吴进波   

  1. 中海石油(中国)有限公司湛江分公司，广东 湛江 524057
  • 收稿日期:2016-12-30 修回日期:2017-02-27 出版日期:2017-04-10 发布日期:2017-04-10
  • 作者简介:何胜林(1971-)，男，安徽安庆人，教授级高级工程师，主要从事油气藏测井解释评价及岩石物理研究工作. E-mail：heshl@cnooc.com.cn.
  • 基金资助:

    中海石油(中国)有限公司综合科研课题 “东方气田群高温高压天然气藏开发关键技术研究”(编号:YXKY-2016-ZHJ-02);国家“十三五”科技重大专项子课题“莺琼盆地高温高压天然气富集规律与勘探开发关键技术”(编号:2016ZX05024-005)联合资助.

Experiment and application of rock electrical experiment with different gas components under high temperature and high pressure condition

He Sheng-lin，Zhang Hai-rong，Yang Dong，Wu Yi-xiong，Wu Jin-Bo   

  1. Zhanjiang Branch of CNOOC Limited，Zhanjiang 524057，China
  • Received:2016-12-30 Revised:2017-02-27 Online:2017-04-10 Published:2017-04-10

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595

摘要：

在高温高压条件下，对岩电参数受CO2与CH4混合气体影响规律认识不清，导致该类气层含水饱和度计算精度偏低。为此，通过模拟储层温压条件下(温度150℃、围压70MPa、孔隙压力50MPa)的岩电实验，分别利用不同含量CO2与CH4混合气体进行岩心驱替，以测定岩心的岩性系数b值、饱和度指数n值与胶结指数m值，基于实验数据研究分析了CO2与CH4混合气体对岩电参数的影响规律。不同CO2含量混合气体溶解于地层水时候，测定得到的岩性系数a值、胶结指数m值基本没有差异；随着CO2含量升高，岩性系数b值增大，饱和度指数n值降低，并建立了岩性系数b值与饱和度指数n值随CO2含量变化的预测模型。利用该方法确定的岩电参数计算得到的含水饱和度与岩心分析结果吻合较好，证实了方法的可靠性。

关键词: 含CO2气层, 岩电参数, 含水饱和度, 高温高压储层

Abstract:

Due to the fact that the influence of CO2 and CH4 mixed gas on the rock electrical parameters is not clear,calculation accuracy of water saturation is low.Through the simulation of reservoir conditions rock electric experiment,respectively with different content of CO2 and CH4 mixed gas coreflood,with determination of theb,n and m values,the effects have been analyzed of mixture of CO2 and CH4 on the electrical properties of rock.Different CO2 content of mixed gas dissolved in the formation water,the a and m values basically have no difference;with the increase of CO2 content,b value increases, n value decreases.A prediction model was established to the b and n values variance with the content of CO2.The water saturation calculated by this method is in good agreement with the core analysis results,and the reliability of the method is confirmed.

Key words: CO2-containing gas reservoirs, Rock-electro parameters, Water saturation, HTHP reservoir

中图分类号: 

  • TE135

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