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百色盆地东部坳陷中央凹陷带那读组储集层的特点是低孔低渗,非均质性极强,储集层横向可对比性较差,使用传统的交会图、P1/2正态分布法判别储层流体性质,解释符合率很低。从基础资料入手,分析储层特征,通过研究储层流体性质的响应特征,提出了运用油气指示参数IOID与反映孔隙结构的参数m的交会面积法来识别储层流体性质。该方法由于综合了影响该地区储层产量的孔隙度、泥质含量、厚度、含油饱和度、渗透率等关键参数,解释精度和直观性有很大的提高,较好实现了对那读组致密储层流体性质的快速识别。实际应用效果十分显著,可满足油田的开发要求。
The reservoirs of the Nadu Formation in the Central Depression of the eastern depression of the Baise Basin are characterized by low porosity and low permeability, extremely strong heterogeneity and poor contrast in the horizontal direction of the reservoir. The conventional cross plot, P1 / 2 normality Distribution method to determine the nature of reservoir fluid, explain the low rate of coincidence. Beginning with the basic data and analyzing the reservoir characteristics, we proposed the method of identifying the reservoir fluid by using the intersecting area method of the oil and gas indicator IOID and the parameter m that reflects the pore structure by studying the response characteristics of reservoir fluid properties. Due to the combination of the key parameters such as porosity, shale content, thickness, oil saturation, permeability and other factors that affect the yield of the reservoir in this area, the accuracy and intuition of the method have been greatly improved, Rapid identification of fluid properties in tight reservoirs. The actual application effect is very significant, to meet the development requirements of the oil field.