【摘要】 M油田经历20多年开发，目前综合含水率73.2%。油藏边底水水淹与注水水淹共存，且注入水水型多样、水淹类型复杂，急需开展水淹层测井评价方法研究。引入变倍数注入水物质平衡理论，与岩电关系结合开展研究区水淹机理分析，建立了该区不同储层类型、不同注入水矿化度下的地层电阻率、产水率与饱和度之间的变化特征；应用半渗透隔板毛管压力岩电实验建立地层原始电阻率与油柱高度关系，结合水淹机理分析，得出产水率与电阻下降率之间的关系，定量评价水淹级别；优化混合地层水电阻率计算模型，求准剩余油饱和度、产水率等参数，形成了一套M油田水淹层识别及定量评价方法，解释符合率达到87.5%，为油田射孔层优选、避开高水淹层提供了有力的技术支撑，对于海外碎屑岩油田水淹层的剩余油评价与高效开发具有重要的应用价值。更多还原

【Abstract】 Oilfield M currently has a comprehensive water cut of 73.2% after more than 20 years of development,the reservoir is experiencing both edge-bottom water flooding and injection water flooding,with diverse types of injected water and complex flooding patterns,necessitating the research on logging evaluation methods for water-flooded layers.By introducing the variable multiple injection water material balance theory and combining it with the rock-electric relationship,an analysis of the water flooding mechanism in the study area was conducted.This led to the establishment of the variation characteristics between formation resistivity,water production rate,and saturation under different reservoir types and different salinities of injected water in the area;using the semi-permeable membrane capillary pressure experiment,the relationship between the original formation resistivity and the oil column height was established,deriving the relationship between the water production rate and the formation resistivity drop rate,combining the analysis of the water flooding mechanism mentioned above,allowing for a quantitative assessment of the level of water flooding;optimizing the mixed formation water resistivity calculation model to accurately determine parameters such as remaining oil saturation and water production rate,a set of identification and quantitative evaluation methods for waterflooded layers in Oilfield M was formed.The interpretation accuracy reached 87.5%,providing strong technical support for selecting perforation layers in the oilfield and avoiding highly flooded layers.This is of significant application value for the remaining oil evaluation and efficient development of water-flooded layers in overseas clastic rock oilfields.更多还原