低渗透砂岩油藏岩电参数测试方法
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刘丽(1972—),女,河南焦作人,高级工程师,硕士,从事油气藏渗流机理方面的研究工作。联系电话:13963359458,E-mail:liuli-1972@163.com。

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国家科技重大专项“胜利油田特高含水期提高采收率技术(二期)”(2016ZX05011),中国石化胜利油田分公司重点实验室课题“低渗透砂岩油藏岩石电性特征实验研究及应用”(YKS1703)。


Technique of laboratory measurement of rock resistivity parameters in low permeability sandstone reservoir
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    摘要:

    岩石电阻率参数(简称岩电参数)是利用测井资料开展油藏含油饱和度评价及储量计算不可或缺的重要资料,室内岩心测试是获得岩电参数的唯一途径。以胜利油区低渗透砂岩油藏岩心为测试对象,从实验方法和实验条件2个角度,开展低渗透砂岩油藏岩电参数测试结果的影响因素分析,基于岩电参数的单因素比对实验,研究驱替方式、驱替介质、温度、围压及水矿化度对胶结指数m、饱和度指数n 及岩性系数a 和b 的影响。研究结果表明,半渗透隔板法的准静态驱替过程与油藏成藏过程相似,且不受驱替介质类型影响,岩电参数对实验温度变化不敏感,但受围压和地层水矿化度影响显著。基于上述认识,确定适用于低渗透砂岩油藏的岩电参数测试方法:根据地层水矿化度配制等矿化度的实验用水,采用半渗透隔板法进行气驱水或油驱水,在室温条件下模拟地层有效上覆压力,开展低渗透砂岩油藏岩电参数测试。

    Abstract:

    Rock resistivity parameters are important data for reservoir oil saturation evaluation and reserve calculation by logging data. Laboratory core testing is the only way to obtain rock resistivity parameters. Influencing factors on the test results of rock resistivity parameters for the low permeability sandstone reservoir in Shengli Oilfield were analyzed from two aspects of experimental methods and experimental conditions. By means of factor comparison experiment,the influence of displacement method,displacing fluid,temperature,confining pressure and brine salinity on cementation exponent m,saturation exponent n and lithology factor a and b was discussed. The research results show that quasi-static displacement process of semipermeable plate method is similar to the oil accumulation of the oil reservoir whatever the displacement media is. The rock resistivity parameters is not sensitive to the experiment temperature,but is influenced by confining pressure and formation water salinity greatly. At last,technique of laboratory measurement of rock resistivity parameters for the low permeability sandstone reservoir was determined. Experimental water was prepared using the formation water with the same salinity,the semipermeable plate method was applied for water drive by gas or by oil,effective overburden pressure was simulated on the condition of indoor temperature,and the rock resistivity parameters of the low permeability sandstone reservoir were tested.

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刘丽,张红欣,闵令元,顾辉亮,杨怀建.低渗透砂岩油藏岩电参数测试方法[J].油气地质与采收率,2018,25(1):106~111

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  • 在线发布日期: 2017-12-06