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准噶尔盆地中拐凸起石炭系火山岩岩性复杂多样、横向变化快、纵向厚度大,岩性识别和多井对比困难;石炭系火山岩(包括酸性岩)均呈低GR特征,利用GR无法准确识别岩性。运用岩心标定测井,利用ECS测井进行成因、成分分析选取敏感矿物建立交会图进行火山岩化学成分划分,结合电成像测井反映的结构构造信息建立成像模式图版进一步从结构山对岩性进行识别;在特殊测井识别岩性的基础上,分析不同岩性、不同结构及矿物成分的火山岩常规测井相应特征,将特殊测井识别结果推广到常规测井中,进行常规曲线敏感性分析,建立中子-密度交会图,从而实现利用常规测井曲线划分火山岩岩性。
Carboniferous volcanic rocks in Zhongguang uplift in Junggar Basin are complex and diverse in lithology, characterized by rapid horizontal variation, large vertical thickness, and difficulty in lithologic identification and multi-well contrast. Carboniferous volcanic rocks (including acidic rocks) are characterized by low GR and can not be accurately identified by GR Lithology. Use of core calibration logging and ECS logging for genesis and composition analysis Select sensitive minerals to establish cross-sectoral map for volcanic chemical composition division, combined with structural imaging information reflected by electrical imaging logging to create an image pattern plate to further identify lithology from structural mountains On the basis of special logging identification lithology, the corresponding characteristics of conventional logging of volcanic rocks with different lithology, structure and mineral composition are analyzed. The special logging identification results are generalized to conventional logging, and conventional curve sensitivity analysis is carried out. Establishing neutron-density crossplot maps to achieve volcanic lithology using conventional well logs.