松辽盆地两江地区油成藏模式及其控制因素

松辽盆地的两江地区（嫩江，松花江沿岸地区）横跨黑龙江和吉林两省，构造上位于古龙凹陷，长岭凹陷，三肇凹陷，朝阳沟阶地和扶余隆起筱二级构铁交换部位，两江地区是松辽盆地油气勘探的重点地区之一，油气勘探的层位移位，即有下部的扶余，杨大城子油层和中部的萨尔图，葡萄花油层，又有上部的黑帝庙油层，其中以扶，扬油层为主，目前已发现了升平，榆树林，朝阳沟，大安，新北，新庙，新民，肇州，头台－茂兴，扶余等一批油田，油源对比资料表明，该区原油主要来自青山口组和嫩江组一段成熟烃源岩，少部分来自嫩二段，嫩三段低熟烃源岩，盖层主要是青山口组和嫩一段的大套泥岩，圈闭的类型较大，主要为岩性圈闭，还发育有断层－岩性圈闭和混岩裂缝圈闭，原油主要是通过砂体，断或二者构成的空间网络向圈闭中运移，该区油气运聚成藏条件复杂，因此，研究该区油的成藏模式和分析油的运聚成藏分布的控制因素，对于指导该区敢勘探具有重要意义。

Oil accumulation models and their controlling factors in two-river area of Songliao basin

By analyzing the type of oil reservoirs and the spatial correlation between reservoir and oil source rock and migration way, the authors put forward four oil accumulation models, they are anticlinal and structure-lithological oil reservoirs formed by the matching between high structural place and sandbody, sand lens oil reservoirs formed by oil primary migration from source rock, fault-lithological oil reservoirs formed through the link between source rock and uncontinucous banding and lenicular sandbodies and the fractured oil reservoirs in mudstone formed by the matching between structural stress and abnormal pore fluid pressure. Based on this, the authors hold that the formation and distribution of oil reservoirs in this aera were mainly controlled by the factors such as mature area of source rock, distribution area of good cap rock, development degree of faults and migration way of hydrocarbon.