松辽盆地北部青山口组致密油特征及聚集模式

发布时间：2018-05-13 03:33

  本文选题：聚集模式 + 致密油　； 参考：《沉积学报》2017年03期

【摘要】：通过钻井、测井、岩芯及实验数据综合分析,对松辽盆地北部青山口组致密油特征与聚集模式进行了深入研究。结果表明,松辽盆地北部青山口组致密油分布在三角洲前缘及湖相区,储集层属于片状浊流形成的致密储层,孔隙度一般小于10%,局部可达到15%,渗透率普遍小于0.1×10~(-3)μm~2。储集空间为粒间孔、粒内溶孔、铸模孔、微裂缝等,孔隙直径分布在5~200μm,孔喉半径小于0.5μm。烃源岩是青山口组一段和二段湖相泥岩,具有广覆式分布特点,干酪根为Ⅰ型或Ⅱ1型,平均有机碳含量(TOC)为1%~3%,热成熟度(Ro)为0.9%~1.1%,属优质成熟烃源岩。聚集模式为储层平面上大面积连续分布,无明显边界,纵向上储层与源岩交互叠置形成千层饼状,具有紧密接触的源储共生型成藏组合。因此,致密油聚集宏观上受成熟烃源岩控制,其次取决于致密储层分布。致密油储层普遍超压,含油级别为油斑和油迹,不存在油浸和富含油,原油属于低黏度轻质原油,单井无自然产能,采取水平钻井并进行大规模分段体积压裂才能获得工业产能。对其沉积及聚集模式的认识为松辽盆地北部致密油勘探拓展了新的空间,具有实际指导意义。
[Abstract]:Through comprehensive analysis of drilling, logging, core and experimental data, the characteristics and accumulation model of dense oil in Qingshankou formation in northern Songliao Basin were studied. The results show that the dense oil of Qingshankou formation in the northern Songliao Basin is distributed in the delta front and lacustrine facies, and the reservoir is a compact reservoir formed by sheet turbidite flow. The porosity is generally less than 10, the local porosity is less than 15 and the permeability is generally less than 0.1 脳 10 ~ (-3) 渭 m ~ (-2). The reservoir space is composed of intergranular pore, intragranular solution pore, mold hole, microfracture, etc. The pore diameter is distributed in 5 ~ 200 渭 m, and the pore throat radius is less than 0.5 渭 m. The source rocks are lacustrine mudstones of the first and second member of the Qingshankou formation, with wide distribution characteristics. Kerogen is of type I or 鈪，

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