东营凹陷牛庄砂岩透镜体油气藏微观充注机理

对牛庄油田牛103井、牛105井、牛106井、牛107井和史11井共计36块流体包裹体样品进行了系统而深入的研究, 系统获取了牛34-C砂体、牛106-D砂体和史10-C砂体的GOI (artz grains containing oil inclusions, 石英颗粒含油包裹体丰度) 数据.运用GOI分析技术和荧光观测技术, 结合试油成果数据, 分析了牛庄油田岩性油气藏的油气微观充注历史.结果表明: 早期充注于史10-C砂体、牛106-D砂体中的早期成熟油气藏, 可能遭受晚期充注高成熟油气的驱替, 并有可能在浅层形成次生油气藏, 而现今赋存于这些岩性油气藏的油气主要为晚期充注的产物; 牛34-C砂体中的油藏为两期油气充注共同作用结果.上述认识对揭示牛庄地区隐蔽油气藏成藏机理具有参考意义. 

Micro-charging Processes of Hydrocarbon in the Niuzhuang Lentoid Sandy Reservoirs, Dongying Depression

In this study, thirty six fluid inclusion samples have been systemically measured, selected from five wells in Niuzhuang oilfield in Dongying depression. The fluorescence colors of oil inclusions and GOI (quartz grains containing oil inclusions) data have also been obtained for three sand bodies, titled Niu 34-C, Niu 106-D and Shi 10-C. By the integration of these data with the DST data, the micro-charging histories of hydrocarbon in the lithologic reservoirs of Niuzhuang oilfield have been described. The results indicate that the reservoirs were mainly charged by the second order of higher mature hydrocarbon; the first charging mature oils of Shi 10-C and Niu 106-D sandy bodies were possibly swept by the second order, which would have formed the secondary oil reservoirs in the upper reservoir; the Shi 34-C sandy body reservoir was jointly charged by the early maturity and later high maturity oils. These results will be useful as a reference for revealing the hydrocarbon migration and accumulation of some other subtle reservoirs.