摘要
辽河坳陷清水洼陷深层烃源岩非常发育,厚度大,分布范围广,有机质丰度高、类型好,其中沙三段以湖相泥岩为主,为好烃源岩,油源条件优越,具备形成大中型岩性油气藏的物质基础。东营组储集砂岩发育,且以泛滥平原河流相沉积为主,其中东三段河道砂体发育,单层厚度较大,具有良好的储集性能,为岩性油气藏发育提供了有利条件。东营组各段均发育有利的局部盖层,与各层段发育的砂砾岩体构成区内良好的储盖组合。发育两种油气输导体系,即受构造作用控制形成的断裂输导体系和受沉积作用控制形成的砂岩输导体系,为油气运聚提供了通道条件。研究指出,清水洼陷的岩性油气藏可以作为下一步勘探的主攻方向。
Deeply buried source rocks in Qingshui Subsag of Liaohe Depression feature in well development, huge thickness, wide distribution, high abundance and good types of organic matter. Es3 source rock is mainly lacustrine mudstone and has favorable conditions for oil generation, laying a solid basis for forming large-and medium-sized lithologic oil and gas reservoirs. Reservoir sandstones developed in Dongying Formation and they are mainly floodplain fluvial deposits. Channel sandbodies developed in Ed3 with larger monolayer thickness and good reservoiring performance, providing favorable conditions of the development of lithologic oil and gas reservoirs. Favorable regional caps developed in each segment of Dongying Formation, forming good reservoir-cap assemblages combined with sandstone rocks developed in each segment in the area. Two types of oil and gas transportation systems developed in the Formation, i.e., the fault transportation system determined by structural effect and the sandstone transportation system determined by sedimentary effect, providing channels for oil and gas migration and accumulation. Research shows that the lithologic reservoir of Qingshui Subsag could be the target for next exploration.
出处
《中国石油勘探》
CAS
2007年第6期14-17,共4页
China Petroleum Exploration
关键词
辽河坳陷
清水洼陷
东营组
岩性油气藏
河道砂
Liaohe Depression
Qingshui Subsag
Dongying Formation
lithologic oil and gas reservoir
channel sand
