松南气田营城组火山岩气藏的精细描述

The Description of Volcanic Gas Reservoir of Yingcheng Formation in Songnan Gas Field

根据松辽盆地南部长岭断陷的钻井、测井和地震资料,针对营城组火山岩,给出气藏在不同火山机构的分布特征。结果表明:气层多发育在火山机构的顶部,差气层多发育在火山机构的中下部。在同一火山机构内部,火山岩储层连通性好,延伸范围广。在不同火山机构中,受亚旋回、火山机构类型和断裂的影响,火山岩储层不连通,独立成藏。储集空间类型多样化的火山机构,其孔隙度和渗透率值较大,易形成良好的油气储层。

According to datum of the drilling,well-logs and seismic from the Changling Fault Depression in the southern of the Songliao Basin,the distributing characteristics of gas reservoirs in different volcanic edifices are presented for the volcanic rocks of the Yingcheng Formation.The results indicate that gas layers are mainly developed at the top of volcanic edifices,and differential gas layers are mainly developed in the middle and lower parts of the volcanic edifices.The volcanic reservoirs have good connectivity and wide extension in the same volcanic edifices,and are disconnected and form independent reservoirs due to the influence of sub cycles,types of volcanic edifices and faults in different volcanic edifices.Volcanic edifices with diversified reservoir space have high porosity and permeability,and it is easy to form good oil and gas reservoirs.