【摘要】 西斜坡区萨二、三油层油气藏主要有背斜、构造-岩性、岩性上倾尖灭、透镜体和断层遮挡5种类型,分布在泰康隆起带及其附近,且具有油气同层,气在上油在下的特征.油源对比表明油气主要来自齐家—古龙凹陷的青山口组和嫩一段源岩;油气成藏主要有2个时期,第1期为嫩江组沉积末期,第2期为明水组沉积末期-老第三纪沉积初期.分析了油气成藏条件及其时空匹配关系,认为该区存在砂岩上倾尖灭圈闭、构造及构造—岩性圈闭和断层遮挡圈闭3种油气成藏模式.综合研究表明:泰康隆起带及其附近是西斜坡区萨二、三油层油气勘探的有利地区,位于油气运移方向上的各种类型的圈闭应是油气勘探的主要目标.更多还原

【Abstract】 There are five types of oil or gas reservoirs of S₂₊₃ oil layer in west slope region,they are oil or gas reservoirs of anticline,structural lithology,updip pinch out of lithology,lenticular body and fault seal.They mainly distribute on the Taikang uplift and its surroundings.There are the characteristics of oil and gas in the same layer and gas in the upper layer and oil in lower layer.Oil of S₂₊₃ oil layer was from the K1qn and K₁n₁ source rocks in Qijiagulong sag through oil-source correlation.The formation of oil or gas reservoirs experienced two main periods,first was at the end of K1_n sedimentary period,second was from the end of K₂m sedimentary period to the early of Eogene system sedimentary period.this paper summarized three oil or gas accumulation models,they are the accumulation model of oil or gas in the traps of sandstone updip pinching,structure and structure-lithology and fault seal.Taikang uplift and its surroundings are the most favorable oil or gas exploration area of S₂₊₃ oil layer in west slope region and those traps on the main direction of oil or gas migration are the most favorable oil or gas exploration targets through comprehensive analysis.更多还原