论文部分内容阅读
以南梁西区长4+5油层组为例,研究储层非均质性参数在储层评价中的应用。该研究区非均质性较强,在表征储层特性的孔隙度、渗透率、含油饱和度以及有效砂岩厚度四个参数的基础上,添加了表征储层非均质性的渗透率级差、突进系数和变异系数进行聚类分析,结合工区铸体薄片、岩心观察及试油试采结果等资料,建立适合该区的储层评价标准,对该区储层进行综合评价。结构发现不同类型储层对油气后期开发的控制不同:Ⅰ类储层的油层发育好,试油单井产能最高,后期开发过程中稳产时间不长;Ⅱ类储层的油层发育较好,试油单井产能较高,后期进行注水开发一段时期后,其产量逐步上升,是油田的主要开发区域;Ⅲ类储层油层分布范围较少,后期注水开发效果不理想,是剩余油分布的主要部位。储层非均质性参数的加入,使储层综合评价更为合理,能较好地指导油气开发。
Taking the 4 + 5 oil layer in the South Liangxi area as an example, the application of reservoir heterogeneity in reservoir evaluation is studied. The heterogeneity of the study area is strong. Based on the four parameters of porosity, permeability, oil saturation and effective sandstone thickness that characterize the reservoir properties, the permeability gradient which characterizes reservoir heterogeneity is added. According to the result of cluster analysis and the data of castings, core observation and test oil test, a reservoir evaluation standard suitable for this area is established, and the comprehensive evaluation is made for the reservoir in this area. The results show that different types of reservoirs have different control over late hydrocarbon development. Class I reservoirs have well developed reservoirs with the highest production capacity of single wells in trial production and less stable production in the later period of development. Class II reservoirs are well developed. Oil well productivity is higher, after a period of late waterflooding development, its production gradually increased, which is the main development area of the oilfield; Class Ⅲ reservoir reservoir distribution range is less, the late waterflooding development is not ideal, is the remaining oil distribution Site. The addition of reservoir heterogeneity parameters makes the comprehensive evaluation of reservoir more reasonable and can better guide the development of oil and gas.