松辽盆地古龙地区天然气勘探方向

松辽盆地断陷期控陷断裂的形成历史复杂，各个区段的断裂最初独立发展，进而相邻区段的断裂相互影响、相互作用，连接成一条完整的边界断层，所经历的复杂的运动学过程控制了断陷的基本结构。古龙地区由于控陷断裂发育程度低，所以深层断陷的平面分布比徐家围子地区零散，纵向沉降幅度较小，缺少大中型的区域性生烃中心，烃源岩分散于各个独立的小型断陷。古龙地区天然气勘探最有利的地区应位于南部规模较大的茂兴断陷，有利聚集带应是茂兴断陷的半深湖相烃源岩发育区。

Natural gas play targets in Gulong area,Songliao Basin

The boundary faults controlling the fault depressions in Songliao Basin underwent the complicated developing process, and all of the big boundary faults developed from the independent stages to the interaction and interlinked stages of the respective sections. The complicated dynamic processes controlled the different fault depression structures. Compared with the boundary faults in the Xujiaweizi area, most of the developing levels are low in Gulong. The fault-depressions in the Gulong area are distributed discontinuously with small sedimentary rates, and there is no extensive source rock. The source rock exists in the isolated small fault depressions. The source dominating reservoir suggests that the potential favorable areas of the natural gas plays in the Gulong area should be located in the Maoxing fault depression, big fault depression in the south, and the key play zones should be located in the hemi-deep lake facies of Maoxing fault depression.