尚家地区葡萄花油层成藏模式及主控因素

Oil Accumulation Model and Main Controlling Factors of Putaohua Oil Layer in Shangjia Region

为了研究尚家地区葡萄花油层油成藏模式及主控因素,利用油源对比首先确定出葡萄花油层油主要来自三肇凹陷青一段源岩,其具有较强的供烃能力;然后利用油分布与源岩空间位置关系、油运移动力和通道特征,确定出该区葡萄花油层油成藏模式为三肇凹陷青一段源岩生成的油在超压作用下通过T2源断裂向下伏扶杨油层'倒灌'运移,再在浮力作用下通过被断裂沟通砂体侧向运移至尚家地区,最后在浮力作用下通过T2—T11断裂向葡萄花油层中运移,在断块、断层遮挡和断层-岩性圈闭中聚集成藏。油成藏主要受扶杨油层油分布区、T2—T11断裂分布和圈闭发育的控制,即扶杨油层油分布区控制着油聚集分布的区域,T2—T11断裂分布控制着油聚集的具体部位,圈闭发育为油聚集成藏提供了场所。

According to the comparison between source rock and oil, oil of Putaohua oil layer in Shangjia region was mainly derived from K1qn^1. source rock in Sanzhao sag. There is a strong ability of supplying oil of K1 qn^1, in Sanzhao depression. Based on the spatial relationship between oil distribution of Putaohua oil layer in Shangjia region and K1qn^1 source rock in Sanzhao sag, the dynamic force and transporting pathway of oil migration, oil accumulation model was considered as oil from K1 qn^1 source rock in Sanzhao sag migrated downward into Fu - Yang oil laYer through T2 faults under overpressure. Oil of Fu -Yang oil layer in Sanzhao sag migrated laterally to Shangjia region through sand body connected by faults under the buoyancy. Oil of Fu- Yang oil layer in Shangjia region migrated upward into Putaohua oil layer through T2 - T11 fault under the buoyancy and accumulated in fault block, fault seal and faultlithology traps to form oil reservoirs. Tiae relationship between oil distribution of Putaohua oil layer and main accumulation conditions, oil accumulation and distribution of Putaohua oil layer in Shangjia region was mainly controlled by oil distribution of Fu - Yang oil layer, distribution of T2 - T11 faults and trap development. That is, oil distribution of Fu - Yang oil layer. Distribution of T2 -T11 faults controls exact places development provides spaces for oil of Putaohua oil layer layer controls oil distribution of Putaohua oil of oil accumulation in Putaohua oil layer. Trap to accumulate and distribution.