【摘要】 在中低孔隙度、低矿化度地层水、岩石结构变化大的复式复杂砂岩油藏中,含油性评价精度一直是二连地区测井解释的难题。介绍了介电测井在二连地区油水层识别方面的应用效果,建立了介电测井解释标准。47 MHz介电反映的主要为过渡带中的剩余油气,剩余油的多少与地层孔隙结构、地层压力、钻井液压力等因素有关。同样孔隙条件下,介电测井在中低渗透率储层中的应用效果比高渗透率储层中效果好。实际应用中必须分区域、分层组建立解释标准。实际资料证明,47 MHz介电测井在地层电阻率大于5Ω.m、泥浆电阻率大于1Ω.m时测量精度较高。更多还原

【Abstract】 In complex sandstone reservoir with medium-low porosity and low salinity of formation water and fast changes of rock structure,the oil-bearing property evaluation accuracy is always the difficult problem in logging interpretation in Erlian area.Based on the theory of dielectric log interpretation,this paper introduces the application effects of dielectric log in identifying oil and water beds,and sets up the logging interpretation norms of dielectric log,and provides an effective way to evaluate the oil-bearing property in complex sandstone reservoir.47 MHz dielectric log displays the residual oil and gas in the transition zone.Quantity of the residual oil has a relation with the formation porosity,pressure,drilling fluid pressure and the like.When porosity is the same,the dielectric log is better in medium-low permeability reservoir than in high permeability reservoir.In practical log operations,we must build log interpretation criteria for different zones and different layers respectively.Field log data show the measuring precision of 47 MHz dielectric log is higher when formation resistivity is over(5 Ω·m) and mud resistivity over 1 Ω·m.更多还原