摘要
典型油藏解剖和油藏与成藏条件空间分布配置关系研究表明,三肇凹陷油源区内外葡萄花油层油成藏与分布主要存在4个差异。①油来源不同:油源区内葡萄花油层油直接来自下伏青山口组一段源岩;而油源区外油直接来自下伏扶杨油层。②油运移条件不同:油源区内葡萄花油层油运移动力有浮力和超压,运移距离短,途中损耗量小;而油源区外油运移动力仅有浮力,运移距离长,途中损耗量大。③油运聚成藏过程和模式不同:油源区内葡萄花油层油成藏模式为青一段源岩生成的油在超压和浮力的作用下,通过油源断裂向上覆葡萄花油层中运移,在油源断裂附近的断块或断层-岩性圈闭中聚集成藏;而油源区外油成藏过程及模式为下伏扶杨油层中已聚集的油在浮力的作用下,通过油源断裂向上部葡萄花油层调整运移,在油源断裂附近的断块或断层-岩性圈闭中聚集成藏。④油成藏分布的控制因素不同:油源区内葡萄花油层油成藏过程及分布主要受油源断裂分布控制;而油源区外油成藏分布主要受扶杨油层油区和油源断裂分布的共同控制。正是上述4个差异,造成油源区葡萄花油层油明显较油源区外富集。
Analysis of typical oil reservoirs and hydrocarbon accumulation conditions indicate that there are four major differences of hydrocarbon accumulation and distribution between Putaohua play inside and outside hydrocarbon kitchen in Sanzhao depression.①Oil sources are different.Oil of Putaohua play inside the kitchen is directly sourced from the source rocks in the underlying 1st member of Qingshankou Formation（MQF）,while that outside the kitchen is directly sourced from the underlying Fuyang play.②Hydrocarbon migration conditions are different.Oil migration to Putaohua play inside the kitchen are driven by both buoyancy and overpressure and features in short distance and small amount of loss.In contrast,that outside the kitchen is solely driven by buo-yancy,and is characterized by long distance and large amount of loss.③Hydrocarbon accumulation process and patterns are different.For Putaohua play inside the kitchen,oil generated by MQF source rocks migrates to the overlying Putaohua play along the source rock-rooted faults under the driving of overpressure and buoyancy,and accumulates in fault blocks or fault-lithologic traps near the faults.In contrast,for Putaohua play outside the kitchen,oil from Fuyang play migrates to the overlying Putaohua play along the source rock-rooted faults under the driving of buoyancy and accumulates in fault blocks or fault-lithologic traps near the faults.④Controlling factors of hydrocarbon accumulation and distribution are different.Hydrocarbon accumulation and distribution of Putaohua play inside the kitchen is mainly controlled by the distribution of the source rock-rooted faults,while that outside the kitchen is jointly controlled by the distribution of Fuyang play and source rock-rooted faults.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2012年第4期616-623,共8页
Oil & Gas Geology
关键词
成藏条件
成藏模式
葡萄花油层
三肇凹陷
松辽盆地
hydrocarbon accumulation condition； hydrocarbon accumulation pattern； Putaohua play； Sanzhao Depression； Songliao Basin
