柴西北区咸水泉构造深层勘探潜力分析  

The Deep Analysis on Exploration Potential of Xianshuiquan Deep Structure in the North of Western Qaidam Basin

作　　者：路俊刚[1] 陈世加[1] 欧成华[2] 张道伟[3] 薛建勤[3] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]西南石油大学石油工程学院,四川成都610500 [3]青海油田分公司勘探开发研究院,甘肃敦煌736202

出　　处：《石油天然气学报》2010年第4期54-57,70,共5页Journal of Oil and Gas Technology

基　　金：国家"973"规划项目(2006CB202305);四川省重点学科项目(SZD0414)

摘　　要：咸水泉构造浅层(N12下部-N1上部N12)已形成油田,但深层(N1下部N11及其以下地层)至今没有获得突破。咸水泉构造浅层原油伽马蜡烷丰度较高,在柴西北区除与红沟子浅层原油相似外,与其他构造原油和源岩均不同。对该区源岩进行了综合评价,认为E23和N1源岩为有效烃源岩,有机质类型较好,且已进入生烃门限,具有较大的生烃能力。油源对比认为,工区浅层高伽马蜡烷原油来自咸水泉-红沟子地区N21局部咸化湖盆时期形成的源岩,而深部N11和E32地层烃源岩产物没有运移到浅层,应该还在构造深部富集,并结合构造、沉积储层研究结果,认为构造深层具有较好的勘探潜力。Comercial oil and gas flow were found in the shallow layer of Xianshuiquan Structure,and the oil was distributed mainly from lower N12 to upper N1 formation,but there was no breakthrough in deep layer of Xianshuiquan Structure up to now.The oil in the shallow layer was featured with high gammacerane content,which is similar with that of shallow Honggouzi Structure in the northwest of Qaidam Basin ,but it was different from the oil and the source rocks of other structures.The source rocks in the area were evaluated comprehensively,and it was pointed out that the source rocks in E23 and N1 formation were effective ones,which was featured with high abundance of organic matter,sapropelic matter and at peak hydrocarbon-generating stage,so it can generate large oil.By the oil-source correlation study,it is pointed out that the oil in the shallow layer of Xianshuiquan Structure is originated from the upper N1 saline lacustrine basin that is between Xianshuiquan and Honggouzi region,and the oil from lower N1 and E23 formation source rock is not migrated to the shallow layer,in combination with the study of structure and sedimentary reservoir,it is pointed out that the deep structure has good exploration potential.

关 键 词：柴达木盆地 咸水泉构造 烃源岩 油气源 勘探潜力 

分 类 号：P618.13[天文地球—矿床学]