西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

天然气藏中二氧化碳含量的测井定量评价方法

何胜林1,赵军2 *,周家雄1,张海荣1,王迪2   

  1. 1. 中海石油湛江分公司研究院,广东湛江524057
    2. 西南石油大学地球科学与技术学院,四川成都610500
  • 出版日期:2016-08-01 发布日期:2016-08-01
  • 通讯作者: 赵军,E-mail:zhaojun_70@126.com
  • 基金资助:

    国家科技重大专项(2011ZX05023 004 02)。

Quantitative Evaluation of Carbon Dioxide Content in Natural#br# Gas Reservoir with Logging Data

HE Shenglin1, ZHAO Jun2*, ZHOU Jiaxiong1, ZHANG Hairong1, WANG Di2   

  1. 1. Research Institute of Zhanjiang Company,CNOOC,Zhanjiang,Guangdong 524057,China
    2. School of Geoscience and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China
  • Online:2016-08-01 Published:2016-08-01

摘要:

当气层中含有二氧化碳时,由于烃气、非烃气以及束缚水同时存在,导致孔隙流体成分及其测井响应趋于复
杂,尤其是二氧化碳溶于水后形成的附加导电性不强且无明显规律,使得运用电阻率方法对二氧化碳的定性识别和定
量计算变得非常困难。基于孔隙度测井方法,利用甲烷气体和二氧化碳气体对热中子减速以及扩散方面影响的差异,
选取中子长短源距计数率值建立了二氧化碳定量计算模型。同时,考虑到在储层高温高压条件下甲烷和二氧化碳气
体声波和密度测井响应特征,结合已有的孔隙度和饱和度数据,运用基于体积物理模型的最优化方法对各流体成分的
含量进行计算。将两种方法同试油和测试结果进行了对比,均取得了良好的效果,证实了方法的可靠性。

关键词: 二氧化碳, 中子长短源距计数率, 最优化方法, 体积物理模型, 阿尔奇公式

Abstract:

When carbon dioxide exists in gas zone,pore fluid composition and logging response are getting more complex
because of the presence of hydrocarbon gas,non-hydrocarbon gas and irreducible water. The extra conductivity caused by the
dissolution of carbon dioxide is absolutely weak and no apparent regulation exists in it,which makes qualitative identification
and quantitative calculation of carbon dioxide very difficult. According to the different influence of methane and carbon dioxide
on thermal neutron moderation and diffusion,this paper builds the carbon dioxide quantitative calculation model with porosity
logging methods based on neutron′s long and short spacing counting rates. Then,in consideration of the logging response
features of methane and carbon dioxide with reservoir at high temperature and high pressure,and by using porosity and saturation
data,we adopted the optimization method based on rock′s physical volume model and calculated the content of each fluid
composition. The effect is proven to be reliable through comparison between the interpretation results and testing conclusion.

Key words: carbon dioxide;neutron&prime, s long and short spacing counting rate;optimization method;physical volume model;
Archie equation

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