空气泡沫驱和二氧化碳驱注入剖面测井方法适用性分析

Applicability analysis of injection profile logging methods for air foam flooding and CO_(2) flooding

空气泡沫驱和二氧化碳驱是低渗透油田三次采油的重要技术手段,为有效研究注入层位的吸入情况,需要进行注入剖面测井评价,但空气泡沫液的不稳定体系特征和二氧化碳的超临界状态特性区别于常规水驱流体,常规的测井方法需要进行适用性评价研究。在对已有注入剖面测井方法的原理适用性研究的基础上,发现八参数注入剖面测井方法在二氧化碳和空气泡沫驱中适用性良好,脉冲中子氧活化可用于二氧化碳注入剖面测井,常规同位素示踪测井方法在空气泡沫驱和二氧化碳驱中适用性不良,分布式光纤测井方法适用性强,在二氧化碳和空气泡沫驱具有良好的应用前景。

Air foam flooding and CO 2 flooding are important technical means for tertiary oil recovery in low permeability oil fields.In order to study the suction of injection zones,injection profile logging evaluation is needed.However,the unstable system characteristics of air foam fluid and the supercritical state characteristics of CO 2 are different from those of conventional water drive fluids,and the applicability of conventional logging methods needs to be evaluated and studied.On the basis of studying the principle applicability of the existing injection profile logging methods,it is found that the eight-parameter injection profile logging method has good adaptability in CO 2 and cavitation flooding,pulsed neutron oxygen activation can be used in CO 2 injection profile logging,conventional isotope tracer logging method has poor adaptability in cavitation and CO 2 flooding,and distributed fiber logging method has strong adaptability.It has a good application prospect in CO 2 and cavitation flooding.