准噶尔盆地西泉地区石炭系火山岩岩性测井识别

发布时间：2018-02-01 15:08

本文关键词： 准噶尔盆地北三台凸起西泉地区火山岩测井解释岩性识别　出处：《新疆石油地质》2017年04期 　论文类型：期刊论文

【摘要】：准噶尔盆地西泉地区石炭系火山岩是一个重要的含油岩系,但火山岩岩性识别一直是一个尚未解决的难题,为此,优选对火山岩岩性成分敏感的自然伽马、密度测井曲线,建立了该区石炭系火山岩岩性成分识别图版,据此可将研究区火山岩分为基性岩、中性岩和中酸性岩3大类;再优选对火山岩岩石结构敏感的声波时差和深侧向电阻率测井曲线,建立了研究区火山岩岩性识别图版,将研究区火山岩细分为6种岩性。对于安山岩与安山角砾熔岩重叠部分可应用自然伽马、深侧向电阻率与声波时差三维岩性识别图版有效区分。将3个火山岩岩性识别图版应用到研究区内10口井的岩性识别中,识别结果与岩石薄片分析结果吻合率达75.8%,表明这3个图版应用效果较好,为今后利用常规测井资料准确评价研究区火山岩岩性提供新的技术手段。
[Abstract]:Carboniferous volcanic rock in Xiquan area of Junggar Basin is an important oil-bearing rock series, but the identification of volcanic rock lithology is always a difficult problem. According to the density logging curve, the lithologic composition identification chart of the Carboniferous volcanic rocks in this area is established, according to which the volcanic rocks in the study area can be divided into three categories: basic rocks, neutral rocks and intermediate-acid rocks. The sonic time difference and deep lateral resistivity logging curves which are sensitive to volcanic rock structure are selected and the lithologic identification chart of volcanic rocks in the study area is established. The volcanic rocks in the study area are subdivided into 6 types of lithology. The natural gamma ray can be applied to the overlapping part of the andesite and the andeshan breccia lava. The deep lateral resistivity and acoustic time difference three dimensional lithologic identification plates are effectively distinguished. Three volcanic lithology identification plates are applied to lithology recognition of 10 wells in the study area. The result of identification is consistent with the result of rock slice analysis, which indicates that the application of these three plates is good, which provides a new technical means for the accurate evaluation of volcanic rock lithology in the study area by using conventional logging data in the future.
【作者单位】：中国石油西部钻探工程有限公司测井公司;中国石油西部钻探工程有限公司准东钻井公司;
【分类号】：P618.13;P631.81
【正文快照】： 火山岩岩性识别是评价火山岩油气藏最为重要的基础工作之一[1]。岩性识别及划分结果可直接用于指导岩相的划分及物性、含油气性的评价。目前,火山岩主要的测井识别方法是利用成像测井资料结合取心资料进行识别,但是由于取心资料有限,不能对火山岩进行全井段分析,而充分利用常

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