一种处理碳酸岩油藏饱和度模型的方法研究  

A method study of water saturation model for carbonate reservoir

作　　者：徐文斌[1,2,3] 尚希涛[3] 谭学群[2] 

机构地区：[1]中国石油大学,北京102249 [2]中国石化勘探开发研究院,北京100083 [3]中国石化国际石油勘探开发有限公司,北京100083

出　　处：《复杂油气藏》2015年第1期44-47,86,共5页Complex Hydrocarbon Reservoirs

基　　金：国家科技重大专项"孔隙型碳酸盐岩油藏提高采收率关键技术"(2011ZX05031-003)

摘　　要：静态建模过程中饱和度模型的准确性对于油藏合理开发,储量计算有着重要意义。对于非均质性较强的储层,单一岩石类型和单一的K-φ难以准确描述储层物性的变化,也无法准确的计算储层含水饱和度。针对非均质性较强的碳酸岩油藏,通过岩石类型划分,并结合实验室毛管力数据逐类进行处理,进而确定出每类岩石类型的饱和度模型。基于此建立的饱和度模型能够准确的反应地下流体的真实流动状况和流体分布特征。通过与常规测井结果进行对比,计算结果准确可靠,能够较好的反应储层的流体分布特征。这种方法对于非均质较强的储层尤为适用。Water saturation is an important parameter for building up a static model,which is the base of STOOIP calculation. Generally,single rock type and K-φ relationship can not be used to describe the flow characteristics of liquid due to not considering the impact of formation heterogeneity,especially in carbonate reservoir. Aiming at the pore type of carbonate reservoir with serious heterogeneity,an advanced method is proposed to characterize formation according to rock type. Meanwhile,based on the results of capillary pressure data for each rock type,several saturation height functions are introduced for saturation initialization. The established saturation model through this method can reveal actual flow characteristics of liquid under reservoir conditions. This method showed an excellent agreement with log interpretation after being compared with log saturation. For heterogeneous reservoirs,this method is highly suggested on building- up the saturation model.

关 键 词：静态模型 毛管力 饱和度 岩石类型 非均质储层 

分 类 号：TE344[石油与天然气工程—油气田开发工程]