【摘要】 油层发生盐水水淹后,水淹层电阻率明显下降,如何准确判断水淹级别成为评价水淹层的关键。利用变倍数物质平衡理论模型反演可得到饱含油和饱含水状态下地层电阻率,研究区水淹层的电阻率测井值介于饱含油地层电阻率和饱含水地层电阻率之间,且水淹程度越低,地层电阻率越接近饱含油地层电阻率;反之,则越接近饱含水地层电阻率。利用相对于饱含油地层电阻率和相对于饱含水地层电阻率的变化率建立了水淹层精细解释图版和水淹级别定量划分标准,实际应用表明,涠洲油田盐水水淹层的解释精度达到88.8%,电阻率反演技术为盐水水淹层测井评价奠定了基础。更多还原

【Abstract】 The resistivity of the water flooded zone decreases significantly after saline water flooding occurs in the oil zone. How to accu-rately identify the water flooded level is critical to evaluate the water flooded zones. The resistivities of oil-saturated and water-saturatedzones can be obtained from the inversion of variable multiple material balance model. In the study area, the resistivity value of the waterflooded zone falls between those of oil-saturated and water-saturated zones, and the lower the water flooded level is, the closer the formationresistivity goes to that of the oil-saturated zone; on the contrary, the higher the water flooded level is, the closer it goes to that of the water-saturated zone. The change rates relative to the resistivities of oil-saturated and water-saturated zones are used to establish a detailed inter-pretation chart for water flooded zone and quantitative classification standards for water flooded level. The actual application shows that theinterpretation accuracy of saline water flooded zones has reached 88.8% and the resistivity inversion technology lays a foundation for log-ging evaluation of saline water flooded zones in Weizhou oilfield.更多还原