甘泉—富县地区浅层天然气地球化学特征与气源对比  

Geochemical Characteristics and Gas Source Correlation of Shallow Reservoired Natural Gas in Ganquan-Fuxian Area

作　　者：庄一鹏[1] 陈波[1] 

机构地区：[1]西安石油大学,陕西西安710065

出　　处：《辽宁化工》2011年第5期496-499,共4页Liaoning Chemical Industry

摘　　要：鄂尔多斯盆地甘泉—富县地区浅层含气潜力不断凸现,但是对于其天然气的地化特征、成因类型、气源与成藏等特征缺乏系统的认识。文章通过对该区14个浅层天然气样品组分特征,同位素特征,成因类型特征的精细分析和研究,发现在研究区不同的区块、不同层位中的浅层天然气主要为烃类气体;天然气产出类型延安组主要为气顶气,延长组长2气顶气与溶解气混合产出;不同地区的同位素与成因类型也各有差别。油源对比表明,延长组和延安组天然气主要为原油伴生气,油气同源,气源主要来自主要来自三叠系腐泥质烃源岩,其中长7烃源岩和长4+5烃源岩最为重要。The potential of shallow reservoired natural gas in Ganquan-Fuxian,Ordos basin is more and more outstanding,but we still lack systematic understanding of geochemical characteristics,genetic type and gas source of gas.By meticulous analysis of characteristics of composition,isotope and genetic type of the 14 samples of shallow natural gas from this area,it was found that in different layers of different regions,main component of shallow natural gas is hydrocarbon gases;main type of gas production from Yan＇an group is cap-gas gas,main types of gas production from Chang2 of Yanchang group are cap-gas gas and solution gas;different areas also have difference in isotopic and genetic type.Correlation of oil and source rock shows that gas in Yan＇an group and Yanchang group is mainly oil associated gas,oil and gas have same source,gas source is mainly Triassic sapropelic source rock,chang7 and chang4＋5 source rocks are most important.

关 键 词：组分特征 同位素 成因类型 气源 

分 类 号：TE122[石油与天然气工程—油气勘探]