赵爽,雍自权,杨胜堂,陈玲,蒋天锐,尹廷龙,李丽斌.四川盆地东南缘渝南黔北毗邻地区龙马溪组页岩气有利勘探区预测[J].贵州地质,2015,32(4):241-249 |
四川盆地东南缘渝南黔北毗邻地区龙马溪组页岩气有利勘探区预测 |
Prediction of Favorable Shale Gas Exploration Area of Longmaxi Formation in South Chongqing and North Guizhou Nearby Area of Southeast Sichuan Basin |
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DOI: |
中文关键词: 四川盆地 页岩气 志留系 龙马溪组 有利勘探区 JY1井 |
英文关键词: |
基金项目: |
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中文摘要: |
利用区域地质调查、野外剖面实测、样品采集及实验测试分析,总结了四川盆地东南缘渝南黔北毗邻地区构造特征及其演化过程,重点分析了龙马溪组页岩的岩石学特征和有机地球化学特征。开展与四川盆地东部盆缘已获高产工业气流的JY1井龙马溪组页岩的对比研究,结果表明研究区龙马溪组页岩与JY1井龙马溪组页岩在岩石特征方面具有极大相似性。由此,选取有效黑色页岩厚度、脆性矿物石英含量、埋藏深度、有机质成熟度(Ro)4个指标,同时参照JY1井龙马溪组页岩与之相对应参数确定指标阈值,结合构造特征、地貌复杂性,圈定龙马溪组页岩气有利勘探区,优选出有利勘探区位于研究区的西北部隔挡式构造带内龙骨溪背斜中段、南段北西翼靠近核部区域。 |
英文摘要: |
y regional geological survey,field section measurement,sample collection and experimental test,the structural features and its evolution process of South Chongqing and North Guizhou nearby area of Southeast Sichuan basin are summarized,the petrological features and organic geochemical features of shale gas in Longmaxi formation are analyzed emphaticallyIt’s compared and studied with shale gas of JY1 well which produced rich industrial flow,the result shows the shale gas in the target area has many similarity with the shale gas of JY1 well in petrological featuresThe effective black shale gas thickness,quartz content in brittle mineral,buried depth and organic maturity are chosen to be the indicators,meanwhile,the indicator thresholds are ensured by consult the relative parameters of JY1The favorable shale gas exploration area is determined,include middle Longguxi anticline of ejective structural belt in northwest target area and the northwest core area of south section |
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