【摘要】 准噶尔盆地沙湾组以岩性油气藏为主,存在油砂体规模较小、油层薄、储层岩性变化快等勘探难题。2005年,排2井在沙湾组钻遇油层,日产油49.6 t,地面原油粘度为1.6 mPa.s。立足实践、大胆开拓促成了沙湾组浅层、稀油、高产岩性油藏的突破,高精度三维地震技术发挥了关键作用。车排子地区具有多油源输导、多层系含油、多类型富集、多品位共存的复式聚集特点和"三层楼"油气成藏模式。沙湾组轻质油藏油砂体形态与振幅属性具有较好的对应关系,能够通过地震属性有效识别油水边界。稀油油浸为含油性下限,粉细砂岩为岩性下限,渗透率0.022μm2、孔隙度20%为物性下限,油层声波时差大于300μs/m,电阻率大于1.5Ω.m,电阻增大率大于5.5。已发现沙湾组油藏23个。更多还原

【Abstract】 Shawan exploration of Juggar Basin was faced with exploration problems of small scale oil sand,thin reservoir and rapid changes in lithology.In 2005,Pai 2 Well in Shawan formation drilled oil layer.It obtains 49.6 t/d industrial oil and the ground oil viscosity is 1.6 mPa·s.Practice and boldly exploiting contributes to Shawan’s breakthrough of shallow,light oil and high lithologic oil reservoir,and high-precision three-dimensional seismic technology has played a crucial role.Chepaizi region of Shawan formation has double-gathered and the "three floors" oil and gas accumulation mode of multiple oil source transporting,multi-line oil,multi-type enrichment and multi-grade coexistence characteristics.Shawan’s light oil sand body shape has a good corresponding relationship with amplitude property,and the oil-water boundary can be identified by seismic attributes.Oil of thin oil is oil lower limit,and powder and fine sandstone is lithologic lower limit,permeability of 0.022 μm2 and porosity of 20 % is lower limit for the properties.Reservoir interval transit time is greater than 300 μs/m,resistivity is greater than 1.5 Ω·m and resistivity index is greater than 5.5.23 reservoirs have been found in Shawan.更多还原