松辽外围东部盆地群构造演化特征及油气前景

Structural Evolution and Oil/Gas Prospects of Basin Groups East of Songliao Peripheral Basins

松辽外围东部盆地群勘探程度低且不均衡,地质条件复杂,但具有较好的资源基础。依据各盆地地层发育和构造演化特征的不同,将该区盆地分为继承型和残余型两大类,并指出受大型走滑断裂带及主要隆起的控制,盆地分布具有规律性。在此基础上,分析了研究区主要盆地的生油、储集及成藏条件,明确了继承型盆地具有相对有利的勘探前景。最后提出了"重视继承、加强前期、深化综合"的工作建议,指出勘探程度较低的继承型盆地深层勘探应引起重视。

Songliao peripheral basins are characterized by low level unbalanced exploration and complicated geological conditions,but with better resource bases.Because of the different characteristics of strata development and structural evolution of different basins,basins in the area are classified into two categories---successor basins and remnant basins.Moreover it is pointed out that the basins are distributed with regularity.Based on this,the hydrocarbon generation,accumulation,and reservoir-forming conditions of the main basins in the study area are analyzed.Successor basins are proved to have favorable prospects for exploration.At last suggestions of 'laying emphasis on succession,strengthening preparatory work for oil and gas exploration,and deepening comprehensive study on Songliao peripheral basins' are proposed.Attention should be paid on deep exploration of successor basins featuring in low level exploration.