板桥凹陷深层天然气成藏机理分析  

Hydrocarbon Accumulation Mechanism of Deep Gas in Banqiao Depression

作　　者：刘萍[1] 马建英[1] 罗涛[2] 任仕超[1] 王昌丽[1] 白晶[1] 

机构地区：[1]中石油大港油田分公司勘探开发研究院,天津300280 [2]中石油大港油田分公司原油运销公司,天津300280

出　　处：《石油天然气学报》2013年第1期26-31,173,共6页Journal of Oil and Gas Technology

摘　　要：从天然气成藏机理研究出发,烃源岩评价入手,详细分析了油气来源及油气充注历史,建立板桥凹陷深层岩性油气藏成藏模式。研究表明:①沙三段中下部烃源岩以腐殖型有机质为主,对天然气的形成有利;②沙三段烃源岩有机质丰度高,演化程度高,资源丰富;③油气主要来源于沙三段烃源岩,分2期充注,早期为低熟油,晚期以成熟-高成熟天然气为主。建立了该区近源断裂疏导及岩性砂体充注模式,总结出3种油气富集主控因素:近源-优相-超压,优选有利区带,为下一步板桥凹陷深层天然气藏勘探指明方向。From the aspect of gas accumulation mechanism research and source rock assessment,the origin of hydrocarbon and the history of hydrocarbon filling were analyzed,the hydrocarbon accumulation pattern of lithology reserves in deep layer was established.The research shows that:①the low-mid source rock of Es3 was mainly humic organic matter which was beneficial for gas generation;②in Es3,organic abundance of source rock was high with high evolutional degree and abundant resources;③oil and gas were mainly generated in Es3 source rocks,its filling was divided into two stages,the matured oil was generated from earlier stage,the oil and gas were mature at the late stage.The proximal fault transportation and injection pattern of lithology sand is established,three master controlling factors of hydrocarbon enrichment are summarized such as near source,fine sedimentary facies and overpressure,beneficial zones are optimized and next exploration orientation is demonstrated for the deep gas reserves of Banqiao Depression.

关 键 词：板桥次凹 成藏机理 成藏模式 天然气富集规律 

分 类 号：P618.13[天文地球—矿床学]