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综合利用钻井数据、地震解释成果、测井解释数据、试油试采等动态测试数据,系统剖析了松辽盆地齐家古龙凹陷葡萄花油藏的聚集特征,认为该油藏可以称为连续型致密砂岩油藏,其聚集特征明显与常规油藏不同:1)油藏在构造低部位埋深大于-1 600m范围内大面积分布;2)含油储集层致密,储集层孔隙度普遍小于10%,渗透率普遍小于1mD;3)具有油下水上的倒置型油水接触关系;4)含油储集层压力异常,压力系数普遍大于1.3;5)超压为主要聚集动力,油藏下部烃源岩层压力系数介于1.4～1.5之间.研究结果表明:连续型致密砂岩油藏是一种自然存在的油藏类型,“连续展布的致密砂岩储集层”和“下部超压强排烃烃源岩”是形成该型油藏的关键,综合分析认为松辽盆地三肇凹陷深部位葡萄花储集层具有致密、大面积连片展布、下部烃源岩超压(压力系数1.3～1.8)的特征,是连续型致密砂岩油藏的有利发育区.
Based on the comprehensive utilization of the dynamic test data of drilling data, seismic interpretation, logging interpretation data and test oil production and test, the accumulation characteristics of Putaohua reservoir in Qigu Gulong Depression, Songliao Basin are systematically analyzed. It is considered that this reservoir can be called continuous type Tight sandstone reservoirs have obviously different accumulation characteristics compared with conventional reservoirs: 1) large reservoirs with buried depth greater than -1 600m in low tectonic setting; 2) oil-bearing reservoirs are dense and reservoir porosity is generally less than 10%, and the permeability is generally less than 1mD. 3) Inverted oil-water contact with oil under water. 4) Abnormal pressure in oil-bearing reservoirs, pressure coefficient is generally greater than 1.3. 5) Overpressure is the main aggregating power. The pressure coefficient of source rocks is between 1.4 and 1.5. The results show that the continuous tight sandstone reservoir is a naturally occurring type of reservoir with “continuous tight sandstone reservoirs” and “lower” The source of pressure-expulsion hydrocarbon source is the key to the formation of this type of reservoir. According to the comprehensive analysis, the deep-seated Putaohua reservoir in Sanzhao Sag of Songliao Basin is characterized by dense and large area contiguous spreading and overpressure of lower source rocks Pressure coefficient of 1.3 ~ 1.8) features, is continuous compact Favorable for the development of the area reservoirs.