松辽盆地南部火成岩分布预测及成藏条件浅析

松辽盆地南部火成岩的岩性有侵入岩类、火山熔岩类及火山碎屑岩类。其孔隙类型为孔隙、微裂隙、裂隙。火山碎屑岩储层的储集空间以次生孔隙为主，具备形成工业储层条件，而火山熔岩的储集空间以气孔和裂缝为主，在好的熔岩相带，可形成良好的储层。应用航磁资料和地震资料对该区火成岩分布进行了预测。分析认为，松南火成岩成藏具有以下有利条件：充足的油源供给是火成岩成藏的必要条件；长期活动的断层是油气运移的通道；良好的储层相带是油气富集高产的条件；良好的盖层条件是油气成藏前提。在龙王构造完钻的农47井，成藏条件较好，有希望获得工业油藏。

Prediction of igneous rock distribution and analysis of reservoirforming conditions in south of Songliao basin

Igneous rocks in the south of Songliao basin include intrusion rock, volcanic lava, and volcanoclastic rock. Pore types include pore, micro fissure, and fissure. Major reservoir space of volcanoclastic rock is secondary pore, which has the condition of forming commercial reservoir. Major reservoir space of volcanic lava is vesicle and fissures. Good reservoir might develop in good lava facies. Distribution of igneous rocks is predicted by using aeromagnetic and seismic data. It is thought that, there were following favorable conditions in forming of igneous reservoirs in this basin: rich oil source was necessary for forming reservoirs; long-lived fault was the path of oil migration; good reservoir facies is the condition of oil and gas accumulation; and good cap rock was the precondition of forming oil and gas reservoirs. Good reservoir forming condition has been found in well Nong47 completed in Longwang structure, and commercial reservoir is being prospected here.