基于典型层的非均质厚层水淹层精细解释方法

The Fine Interpretation Method Based on the Thick Water Flooded Layers of Typical Heterogeneity

近十年来测井技术取得了很大进步,但尚未形成完整配套的适应薄差油层、非均质厚层精细解释的水淹层测井系列。油田经历了淡水驱、污水回注驱、化学驱进入高水淹后期开发阶段以后,油层物理性质发生了极其复杂变化,水淹层测井解释难度越来越大,原有的解释方法愈加不能满足油田开发需求,非均质厚层水淹层精细解释符合率一直徘徊于75%~80%之间。为进一步提高非均质厚层解释符合率,更好地为老油区挖潜服务,总结分析了影响测井解释精度的诸多影响因素,针对性提出了基于＂典型层＂的定性判别方法,并挂接到软件平台应用,使非均质厚层精细解释符合率明显提高,同时大大提高了人机交互解释效率。经取心井68层验证,解释符合率85%以上,具有广泛的应用前景。

Logging technology has made great progress in the recent ten years,but has not yet formed a complete logging interpretation series adapted to the poor thin reservoirs and thick water flooded layers of heterogeneity.After water flooding,water reinjection displacement,chemical flooding in the late development stage,the physical properties of reservoirs become extremely complex,which leads to difficult logging interpretation and the conventional methods can not meet the need to oilfield development.The coincidence rate of interpretation for thick water flooded layers of heterogeneity is between 75% ~ 80%.In order to improve coincidence rate to better service for development of the old oilfield,a qualitative identification method based on 'typical layer' is proposed by analyzing the factors that influence the precision of logging interpretation.It is connected with the software platform.The coincidence rate increased greatly and man-machine interactive interpretation is much improved at the same time.It is verified in 68 layers of coring wells that the interpretation coincidence rate is more than 85%.It has wide application prospect.