岩性油气藏 ›› 2016, Vol. 28 ›› Issue (1): 111–116.doi: 10.3969/j.issn.1673-8926.2016.01.015

• 技术方法 • 上一篇    下一篇

筇竹寺组和龙马溪组页岩弹性与复电阻率特性研究

窦春霞,唐新功,向 葵,孙 斌,严良俊   

  1. 长江大学 油气资源与勘探技术教育部重点实验室,武汉 430100
  • 出版日期:2016-01-20 发布日期:2016-01-20
  • 通讯作者: 唐新功(1968-),男,博士,教授,博士生导师,主要从事电磁法勘探和地球动力学方面的教学与研究工作。 E-mail:285713431@qq.com。
  • 作者简介:窦春霞( 1990- ),女,长江大学在读硕士研究生,研究方向为电磁勘探。 地址:( 430100 )湖北省武汉市蔡甸区大学路特 1 号长江大学。E-mail : 1220470589@qq.com
  • 基金资助:

    国家自然科学基金项目“基于 GPU 的可控源电磁三维各向异性储层参数反演”(编号: 41274115 )、“移动双极电偶源瞬变电磁成像方法与应用基础研究”(编号: 41274082 )、“中上扬子区页岩总有机碳含量与复电阻率的关系模型实验研究”(编号: 41404087 )以及国家重点基础研究发展计划( 973 )项目“深部油气储层综合地球物理探测和评价方法”(编号: 2013CB228605 )和中国石油创新基金项目“页岩物性及宽频电磁参数测试与建模研究”(编号: 2013D-5006-0302 )联合资助

Elastic and electrical properties of shales from Qiongzhusi and Longmaxi Formation

Dou Chunxia, Tang Xingong, Xiang Kui, Sun Bin, Yan Liangjun   

  1.  Key Laboratory of Exploration Technologies for Oil and Gas Resources , Ministry of Education ,Yangtze University , Wuhan 430100 , China
  • Online:2016-01-20 Published:2016-01-20

摘要:

为研究下寒武统筇竹寺组和下志留统龙马溪组页岩弹性与复电阻率特性,采集了川南、鄂西和渝东地区露头岩样标本。 基于 AutoScan-Ⅱ 多参数测试平台,进行了单点测试及平面扫描。 实验结果表明:筇竹寺组页岩纵横波速度与渗透率呈负相关关系,杨氏模量与泊松比符合远景页岩标准,可压性强。 龙马溪组页岩复电阻率 4 项参数的值随矿化度的升高均不同程度地减小,但对频散曲线形态影响较小;相角和异相电阻率在频率为 10 kHz 内与该频点上复电阻率幅值频散曲线的斜率呈正相关关系;对不同采样点岩样频散特性进行对比,认为黄铁矿颗粒的激发极化作用是重庆石柱地区页岩相角与异相电阻率大幅度频散的主要因素,黄铁矿是有机质富存的特征之一,因此异相电阻率与相角可作为复电阻率测井中探测龙马溪组富含有机质页岩层系的重要参数。

关键词: 流体势, 运移动力, 成藏要素, 下刚果盆地

Abstract:

 In order to study the elastic properties and complex resistivity of shale of Lower Cambrian Qiongzhusi Formation and Lower Silurian Longmaxi Formation in Sichuan Basin, crop samples were collected from southern Sichuan Basin,western Hubei and eastern Chongqing. Based on AutoScan-Ⅱ platform, planar scanning was conducted to shale samples to obtain the petrophysical parameters such as permeability and velocity. The result shows that the velocities of p-wave and S-wave are negatively correlated with permeability, and Young ’ s modulus and Poisson ’ s ratio are in line with shale standards, with strong compressibility. The values of four parameters of complex resistivity of shale in Longmaxi Formation decreased with the ascending of salinity in different degrees, but have less influence on dispersion curve. When the frequency is less than 10 kHz, phase angle and heterogeneous resistivity have a positive correlation with the slope of amplitude dispersion curve of complex resistivity. Through the comparison of dispersion property of different samples, it is considered that polarization effect of pyrite particles is the main factors for significant dispersion of heterogeneous resistivity and phase angle in Shizhu area of Chongqing. Because pyrite is the sign of rich organic matters, phase angle and hetero-geneous resistivity can be used as important indicators to detect target in Lower Silurian Longmaxi Formation.

Key words:  fluid potential , migration force , pooling elements , Lower Congo Basin

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