塔河油田石炭系低阻油层测井评价

塔河石炭系低阻油藏被披覆于奥陶系顶面古地貌隆起上的低幅度构造圈闭和岩性圈闭所控制,油层电阻率与水层电阻率值接近,难以正确识别。为了解决这一难题,在岩心分析、薄片观察、地层水分析及压汞资料的基础上,开展了塔河油田石炭系油层低阻成因分析研究,研究结果表明,地层水矿化度高及束缚水饱和度高是造成其油层低阻的主要原因。为此,建立了适合该区的测井参数解释模型,并根据测井参数解释结果、测试及录井资料,利用交汇图,建立了油水层识别标准。该标准应用于实际工作,取得了较好效果。

Logging evaluation on carboniferous low resistivity oil layers in Tahe oilfield

Carboniferous low resistivity oil layers in Tahe oilfield are under the control of structural trap and lithologic trap with low amplitude in the Ordovician top surface uplift.As the reservoir resistivity and the water layer resistivity value are so close,it is difficult to correctly identify them.In order to solve this problem,based on core analysis,slice observation,formation water analysis and mercury injection data,the genetic analysis of the carboniferous reservoir in Tahe oilfield low resistance has been carried out.The results show that high formation water salinity and high irreducible water saturation are the main causes of the low resistance oil layers.Therefore,the logging parameters interpretation model suitable for this area has been established.According to the logging parameters interpretation result,testing and logging data and by use of intersection diagrams,the identification standard for oil and water layer has been established.This standard can be applied to practical work and has achieved good results.