黔铜地1井钻井技术及页岩气含气性分析

Analysis on drilling techniques and shale gas compacity of Well QTD-1

摘要:

黔铜地1井是部署在黔东北铜仁地区铜仁向斜的一口页岩气地质调查井。本文简要阐述了该井的钻探、测井、气测录井施工技术，并通过钻探取心、地质编录、气测录井、测井、现场解析等工作手段，验证了铜仁地区区域岩石地层单位，获取了黔东北铜仁地区牛蹄塘组黑色页岩发育特征、含气性特征等第一手地质参数。分析认为牛蹄塘组海相页岩在黔东北铜仁地区分布广泛，沉积稳定，是黔铜地1井的主要含气层，整体上含气量随深度的增大而增加，气测全烃最高4%、现场解析在岩心破碎段出气量＞2600 mL、现场含气量最高达1.97 m3/t，显示了良好的保存条件和含气性，证实了铜仁地区页岩气勘探开发具有良好的前景。

Abstract:

Well QTD-1 is a shale gas geological survey well drilled in Tongren, northeast Guizhou Province. A brief description of investigative techniques such as drilling, well logging, gas logging are given in this paper. Through core drilling, gas logging, well logging and field data interpretation, the regional lithologic units have also been verified, with some geological parameters of shale gas within the Niutitang Formation obtained, including the development characteristics of the black shale, the gas bearing capacity. In conclusion, the marine shale of the Niutitang Formation is the main gasbearing strata, and it is distributed extensively and stable in the investigated area. Generally, the gas content increases with the depth; the maximum value of the total hydrocarbon is 4%, the gas production within the broken zone of the core is over 2600mL, and the maximum value of the field gas bearing capacity is 1.97m3/t. All these characteristics indicate a large gas capacity, and show a good prospect for the exploration and development of the shale gas in Tongren area.