渤海湾盆地中、新生代火山岩分布及油气藏特征  

Meso-Cenozoic volcanic rock distribution and reservoir characteristics in the Bohai Bay Basin

作　　者：金春爽[1] 乔德武[1] 淡伟宁 

机构地区：[1]国土资源部油气资源战略研究中心,北京100034 [2]中国石油华北油田分公司勘探开发研究院,河北任丘062552

出　　处：《石油与天然气地质》2012年第1期19-29,36,共12页Oil & Gas Geology

基　　金：全国油气资源战略选区调查与评价项目(XQ-2006-01)

摘　　要：渤海湾盆地经历了中、新生代两个裂陷旋回,伴随了很强的中酸性和中基性岩浆活动。通过系统总结盆地内中、新生界火山岩分布及其油气藏类型,火山岩油气藏发育特征及规律,探讨了渤海湾盆地火山岩油气藏的勘探潜力。研究认为:区内中生界火山岩主要分布在盆地东部,以早白垩世为主;新生代岩浆活动可以分为4期,即孔店—沙四期、沙三期、沙二—东营期和馆陶期。盆地火山岩油气藏主要有3种类型:潜山型、断块型和地层-岩性。中生代火山岩主要发育潜山型油气藏,孔店—沙四期火山岩多发育断块型火山岩油气藏,沙三期火山岩所探明的油气储量最多,地层-岩性火山岩油气藏是新生界火山岩中较常见的油气藏类型,溢流相是最有利相带。除沙三期火山岩外,中生代、孔店—沙四期和海域的沙二—东营期火山岩也具有较大的勘探潜力。Bohai Bay Basin underwent two rifting cycles during the Mesozoic and Cenozoic era,accompanied by intense neutral-acidic and neutral-basaltic magmatism.Based on comprehensive research of the Meso-Cenozoic volcanic rock distribution and their reservoir types,characteristics and patterns,this paper discusses the exploration potential of volcanic hydrocarbon reservoirs in Bohai Bay Basin.The Mesozoic,especially the Early Cretaceous volcanic rock is mainly distributed in the east of the basin;the Cenozoic magmatism may be divided into four stages：Kongdian-Sha4,Sha3,Sha2-Dongying,Guantao.There are three types of volcanic hydrocarbon reservoirs in the basin,i.e.buried-hill,fault block and stratigraphic-lithologic hydrocarbon reservoirs.The first type is mainly developed in the Mesozoic volcanic rocks;the second type is mainly developed in the volcanic rocks of Kongdian-Sha4 stage;the third type is common in the Cenozoic volcanic rocks,of which the effusive facies are the most favorable for reservoir formation.The Sha3 volcanic rocks e contribute to the greatest volume of proven reserves.In addition to the Sha3 volcanic rocks the Mesozoic,Kongdian-Sha4 and offshore Sha2-Dongying volcanic rocks also show great potential for petroleum exploration.

关 键 词：中生代 新生代 火山岩 油气藏 渤海湾盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]