天然气有效储层的测井勘探技术——以准噶尔盆地东部五彩湾凹陷为例

Technology of effective natural gas reservoir exploration based on well logging data—A case study of Wucaiwan sag in the east of Junggar basin

天然气的测井识别方法是天然气勘探中重要手段之一,本文在简单分析气层测井响应特征的基础上,以准噶尔盆地东部五彩湾凹陷为例,分别对以碎屑岩为主的浅层气和火山岩为主的中深层气的测井识别方法原理进行归纳、总结,同时根据研究工区实际的储层特征,给出了部分识别方法的改进思路,并对特殊测井技术的机理以及在气层识别中的应用进行分析,并与基于常规测井信息的识别方法进行有效结合.最后对现有方法的不足和提高天然气勘探成功率给出了一些建议.

Identifying natural gas based on well logging data is one of the important means of natural gas exploration. Firstly, a variety of well log responses in gas zones are introduced briefly. With Wucaiwan sag in the east of Junggar Basin as an example, the methods and principles of identifying the shallow, middle and deep natural gases based on well logging data are summarized respectively, and some ideas about improving the methods are given based on the reservoir characteristics of the region of interest, and the principles of special technology about logging, as well as the applications in identifying the natural gas and the integration with the conventional identify methods are analyzed.Lastly, the authors give their advices about the disadvantages of existing methods and how to increase the success rate of the natural gas exploration.