基于油水非稳态渗流实验的渗流规律分析——以XL油田为例  

Analysis of seepage law based on oil-water unsteady seepage experiment:taking XL Oilfield as an example

作　　者：李鑫羽 欧阳传湘[1] 赵鸿楠 曾羽佳 Li Xinyu;Ouyang Chuanxiang;Zhao Hongnan;Zeng Yujia(College of Petroleum Engineering,Yangtze University,Wuhan 430100,China)

机构地区：[1]长江大学石油工程学院,湖北武汉430100

出　　处：《能源与环保》2021年第9期169-174,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金资助项目(51804044)。

摘　　要：为探明XL油田二次加密后的储层相比开发初期储层的油水渗流规律差异、不同渗透率级别岩况下油水渗流规律差异性、储集层性能的变化情况。通过对XL油田开展油水相渗曲线实验,采用JBN方法计算获得油水相对渗透率并绘制出油水相渗曲线。进行不同渗透率级别油水相渗实验结果规律分析研究、不同开发阶段同级别渗透率相渗曲线规律研究、相渗曲线特征参数随渗透率变化规律研究。研究发现:相渗曲线特征参数在渗透率为10×10-3μm2前后,其拟合曲线呈明显的二段式变化特征;开发前期储层渗流能力优于开发后期;渗透率级别较高的中渗岩样受注水影响岩石物性及渗流能力下降较为明显,低渗岩样性能及渗流能力保持较为稳定。In order to explore the difference of oil and water seepage law between the reservoir after secondary infill in XL Oilfield and the reservoir in the early stage of development,the difference of oil and water seepage law under different permeability levels and the change of reservoir performance,through the experiment of oil-water phase permeability curve in XL Oilfield,JBN method was used to calculate the oil-water relative permeability and draw the oil-water phase permeability curve.The experiment results of oil-water phase permeability at different permeability levels were analyzed and studied,and the phase permeability curve of the same level of permeability at different development stages was studied,and the characteristic parameters of phase permeability curve were studied with the change of permeability.The results showed that:the fitting curve of the characteristic parameters of phase permeability curve shows obvious two-stage variation before and after the permeability is 10×10-3μm2;the reservoir seepage ability in the early stage of development is better than that in the late stage of development;the petrophysical properties and seepage ability of the medium-permeability rock samples with higher permeability level are significantly reduced by water injection,while the properties and seepage ability of the low-permeability rock samples remain relatively stable.

关 键 词：油水相渗曲线 相渗曲线特征参数 渗透率 渗流能力 储层物性 注水开发后期 

分 类 号：TE348[石油与天然气工程—油气田开发工程]