元坝地区须二段低电阻率气层成因与测井评价方法

发布时间：2018-03-23 10:58

本文选题：岩屑砂岩　切入点：石英砂岩　出处：《石油钻探技术》2017年01期

【摘要】：针对元坝地区须二段储层气层判识难度大、传统测井评价方法解释符合率较低的问题,开展了低电阻率气层成因分析及测井评价方法研究。在深入分析须二下亚段沉积微相、储层特征和测录井、测试及试验分析资料的基础上,认为储层矿物组分、孔隙结构、岩石粒径和胶结类型等是影响气层电阻率高低的主要因素,石英含量与测井电阻率呈正相关关系;建立了储层内岩性细分及识别有效储层的测井模式,综合岩性、电阻率和含水饱和度等参数,形成了不同岩性气层的评价标准和低电阻率气层的测井评价方法。该评价方法在元坝地区多口探井陆相致密砂岩气层评价中进行了应用,提升了致密砂岩气层的测井评价成功率,使元坝地区陆相致密砂岩气藏勘探取得了突破性进展。研究与应用表明,利用建立的低电阻率气层测井评价方法可以解决低电阻率气层的漏层和错判的问题,提高解释的成功率。
[Abstract]:In view of the difficulty of gas reservoir identification in the second member of Xuzhou formation in Yuanba area and the low interpretation coincidence rate of traditional logging evaluation methods, the origin analysis and logging evaluation method of low resistivity gas reservoir are studied. The sedimentary microfacies of the second lower member of Xuzhou formation are deeply analyzed. On the basis of reservoir characteristics, logging, testing and experimental analysis, it is considered that the mineral composition, pore structure, rock particle size and cementation type are the main factors affecting the resistivity of gas reservoir. There is a positive correlation between quartz content and logging resistivity, the logging model of lithologic subdivision and recognition of effective reservoir is established, and the parameters such as lithology, resistivity and water saturation are integrated. The evaluation criteria of different lithologic gas formations and the logging evaluation method of low resistivity gas reservoirs have been formed. The evaluation method has been applied to the evaluation of continental tight sandstone gas reservoirs in many exploration wells in Yuanba area. The success rate of logging evaluation of tight sandstone gas reservoir has been improved, and the exploration of continental tight sandstone gas reservoir in Yuanba area has made a breakthrough. The research and application show that, Using the established low resistivity gas reservoir logging evaluation method can solve the problem of leakage and misjudgment of low resistivity gas reservoir and improve the success rate of interpretation.
【作者单位】：中石化胜利石油工程有限公司测井公司;
【分类号】：P618.13;P631.81

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