标题:
生产测井时间推移测井资料确定生产层剩余油饱和度Method to Determine Remaining Oil Saturation in Reservoir by Time-lapse Data of Production Logging
作者:
宋红伟
关键字:
时间推移测井, 剩余油饱和度, 物质平衡, 生产测井Time-Lapse Logging, Remaining Oil Saturation, Material Balance, Production Logging
期刊名称:
《Journal of Oil and Gas Technology》, Vol.40 No.1, 2018-02-15
摘要:
水驱开发油田饱和度评价是油田挖潜、提高油田开发效果的关键。油田开发过程中，生产测井资料是稳定状态下油井生产动态的物理响应，也是生产层油水分布特征的反映。因此，充分利用生产测井综合评价油藏剩余油饱和度具有十分重要的实用意义。针对水驱油藏油水两相分布的特点，以储层的孔隙体积模型为基础，利用物质平衡方程建立了水驱油藏含水饱和度动态变化模型，并在该基础上提出了一种利用生产测井时间推移测井资料求取生产井产层剩余油饱和度的新方法。利用该方法对现场一口生产井历次生产测井资料进行了处理，计算的生产层剩余油饱和度随时间变化的关系与该井历次中子寿命测井解释结果具有良好的一致性，符合油藏开发变化特征。上述结果表明该方法具有结果代表范围大、实用性强等特点，适合于确定水驱油藏产层剩余油分布及对其进行动态监测。
Evaluating oil saturation in reservoirs for water flooding oilfields was the key of increasing oilfield development effectiveness and taping the potential of remaining oil. Production logging data were the physical response of oil well production in steady state and the reflection of oil and water distribution characteristics of producing interval in the process of oilfield development. So it was of great significance of evaluation of remaining oil saturation by using production logging data. In view of the characteristics of oil and water two-phase distribution in water drive reservoirs, in combination with pore volume model of reservoir and material balance equation, a new method for determining remaining oil saturation of producing interval is proposed by using the time-lapse data of production logging. The method is used for processing the production logging data from previous productions in an oil well. The results show that the processed result is well consistent with that of neutron lifetime log evaluation for previous productions. Field examples analyses demonstrate that the method has some advantages over conventional well logging methods, which include larger scope of investigation and better practicality. The method is more applicable for performance monitoring of remaining oil distribution in production interval of water drive pool.