西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (1): 73-79.DOI: 10.11885/j.issn.1674-5086.2015.06.06.25

• 地质勘探 • 上一篇    下一篇

CO2天然气藏岩石电阻声速规律研究

周家雄1, 何胜林1, 陈一健2, 蔡茂佳3, 杜祥勇4   

  1. 1. 中海石油(中国)有限公司湛江分公司, 广东 湛江 524057;
    2. 西南石油大学石油与天然气工程学院, 四川 成都 610500;
    3. 中国石油大港油田勘探事业部, 天津 大港 300280;
    4. 成都市完井岩电实验技术中心, 四川 成都 610500
  • 收稿日期:2015-06-06 出版日期:2017-02-01 发布日期:2017-02-01
  • 通讯作者: 周家雄,E-mail:zhoujiax@cnooc.com.cn
  • 作者简介:周家雄,1971年生,男,汉族,广西富川人,高级工程师,博士,主要从事油气田勘探、开发储层预测等研究。E-mail:zhoujiax@cnooc.com.cn;何胜林,1971年生,男,汉族,安徽太湖人,高级工程师,硕士,主要从事油气田测井岩石物理、测井资料处理解释等研究。E-mail:heshl@cnooc.com.cn;陈一健,1968年生,男,汉族,四川大竹人,副研究员,主要从事岩石物理实验研究。E-mail:248728178@qq.com;蔡茂佳,1969年生,男,汉族,天津武清人,工程师,主要从事试油方面的研究工作。E-mail:caimjia@petrochina.com.cn;杜祥勇,1983年生,男,汉族,四川新都人,主要从事岩石物性、电阻、声学参数测量。E-mail:276418269@qq.com
  • 基金资助:
    国家科技重大专项(2011ZX05023)。

A Study on Acoustic Velocity and Resistivity of Rocks in CO2/Natural Gas Accumulation

ZHOU Jiaxiong1, HE Shenglin1, CHEN Yijian2, CAI Maojia3, DU Xiangyong4   

  1. 1. Zhanjiang Branch of CNOOC, Zhanjiang, Guangdong 524057, China;
    2. School of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    3. Dagang Oilfield Exploration Division Department, PetroChina, Dagang, Tianjin 300280, China;
    4. The Center for Well Completion & Logging Lab, Chengdu, Sichuan 610500, China
  • Received:2015-06-06 Online:2017-02-01 Published:2017-02-01

摘要: 海上盆地复杂的地质条件给天然气勘探带来了重重困难,CO2天然气藏岩石高温高压下电阻声速实验对天然气勘探开发至关重要。介绍了使用SCMS-E型高温高压岩芯多参数仪在温度最高180℃、孔隙压力最高50 MPa的条件下测试不同比例的CO2/天然气混合气体驱替岩样至不同含水饱和度时的电阻率及纵横波速度参数,并测试了干岩样孔隙中充注不同比例的CO2/天然气混合气后的纵横波速度变化。实验结果表明,随驱替气体中CO2含量的变化,岩样饱和度指数有较小变化,胶结系数几乎不变;干岩样孔隙中充注混合气后,随CO2含量的增加,纵波速度有减小趋势。通过Gassmann方程和Batzle经验公式进行流体替换分析,分析结果和测试结果一致。

关键词: 高温高压, 纵横波速度, 饱和度指数, 胶结系数, Gassmann方程

Abstract: The complicated geological conditions of sea basins cause difficulties in natural gas exploration. The resistance and acoustic test of rocks of natural gas accumulation under high temperature and high pressure is essential for natural gas exploration and development. This study introduced a test of resistivity and acoustic properties of core samples that were displaced by various proportions of gas/CO2 mixture at various saturations using an SCMS-E core multi-parameter instrument with various pressures and temperatures and a maximum temperature of 180℃ and a maximum pore pressure of 50 MPa. We also used the instrument to test the change in acoustic velocity of the dry samples that were filled with the gas/CO2 mixture of various proportions. The experimental results showed that the saturation exponent of the saturated samples changed slightly when the content of CO2 in the displacing mixture changed, but the cementation factor remained almost unchanged. The longitudinal acoustic velocity of the dry core samples filled with gas/CO2 mixture decreased with increases in CO2 content. The change in shear acoustic velocity variation was not obvious when the CO2 content changed. The test results were consistent with the analysis results by the Gassmann equation and the Batzle empirical equation.

Key words: high pressure and temperature, acoustic velocity, saturation exponent, cementation factor, Gassmann equation

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