特低渗透微裂缝发育油藏综合相渗曲线计算方法  

Calculation method of comprehensive relative permeability curve for ultra-low permeability reservoir with fracture-developed

作　　者：王东琪[1] 殷代印[1] 周亚洲[1] 

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318

出　　处：《油气藏评价与开发》2017年第5期20-25,共6页Petroleum Reservoir Evaluation and Development

基　　金：国家自然科学基金"特低渗透油藏表面活性剂驱微乳液渗流机理及数值模拟研究"(51474071);东北石油大学研究生创新科研项目"低渗透油藏微乳液驱微观渗流机理研究"(YJSCX2017-006NEPU)

摘　　要：目前,获得油藏综合相渗曲线的主要方法是通过加权系数进行相渗复合。而对于特低渗透微裂缝发育油藏,裂缝和基质中流体饱和度存在对应关系,不能直接加权复合,常规方法不适用。为了准确地研究特低渗透油藏裂缝与基质的综合油水渗流规律,深入分析了不同水驱规律曲线对应的含水上升规律,选用适用性更强的丙型水驱规律公式,在限定相渗经验公式参数取值范围的基础上,通过公式推导及求解得到油水综合相对渗透率曲线。该相渗曲线能够综合反映出微裂缝和基质的渗流特征,预测水驱规律曲线结果吻合度高。At present, the main method to obtain the comprehensive relative permeability curve of oil reservoir is by means of weight coefficient. For the ultra-low permeability reservoir with developed fracture, there exists a corresponding relationship between matrix saturation and fracture saturation, which cannot be directly weighted and the conventional method is not applicable.In order to study the law of oil and water seepage in the fracture and matrix of ultra-low permeability reservoir, the law of water cut is analyzed in depth, and type C water drive curve is more applicable. Based on the range of parameter values of the empirical formula, the relative permeability curves of oil and water are derived and solved by using the formula. The results show that the relative permeability curve is a concave type. It can comprehensively reflect the flow characteristics of micro fracture and matrix.

关 键 词：特低渗透油藏 丙型 裂缝性油藏 水驱规律曲线 相渗曲线 

分 类 号：TE341[石油与天然气工程—油气田开发工程]