茫汉断陷图1井区油气藏成因及其意义  

Genesis of reservoir and its importance of Tu1 well area at Manghan depression

作　　者：万丛礼 张玺 WAN Cong-li;ZHANG Xi(Exploration and Development Research Institute of Northeast Oil & Gas Branch Co., Changchun Jilin 130062, China)

机构地区：[1]东北油气分公司勘探开发研究院,吉林长春130062

出　　处：《油气地球物理》2016年第3期16-19,共4页Petroleum Geophysics

摘　　要：茫汉断陷图1井九佛堂组发现泥岩裂缝油气藏。通过测井和地球化学分析,证实该油气藏下部发育一闪长岩床,且含油气泥岩热演化程度较高以及发生突变。研究认为,闪长岩高温显著促进了泥岩中有机质的生烃演化及油气生成,高压使泥岩产生大量裂缝,生成的油气就近聚集于这些裂缝之中。由于闪长岩规模较小,且附近烃源岩不发育,图1井区油气储量有限。最后指出,松南地区新生代侵入岩比较发育,侵入岩相关油气藏应成为勘探的重要方向。A shale fracture reservoir was found at Jiufotang Formation in Manghan depression. A diorite bed underthe reservoir was found by logging and geochemical analysis, the grade of the thermal evolution of thehydrocarbon-bearing shale was higher and a jump occurred. It is considered that the high temperature of the dioritepromoted the organic generating hydrocarbon evolution and the hydrocarbon generation in the shale, the highpressure made the shale generate a great number of fracture where around the generated hydrocarbon accumulated.Because of the scale of the diorite was smaller and the resource rocks nearby were not developed very much, theshale reservoir reserves was limited at Tu1 well area. It is proposed that the reservoirs relevant to the intrusiverocks should be taken as the important exploration field as there were many Cenozoic intrusive rocks in Songnanarea.

关 键 词：油气藏成因 侵入岩 泥岩裂缝 图1 井区 茫汉断陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]