考虑微观孔喉结构的相对渗透率计算方法  

A new method to calculate relative permeability considering the effect of pore-throat distribution

作　　者：田虓丰[1] 程林松[1] 李翔龙[1] 霍啸宇 毛文辉[1] 蒋丽维 侯涛 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中国石油大学(北京)地球科学学院,北京102249 [3]中国石油华北油田山西煤层气勘探开发分公司地质研究所,山西晋城048000

出　　处：《陕西科技大学学报（自然科学版）》2014年第6期100-104,共5页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51174215/E0403);高等学校博士学科点专项科研基金项目(20130007120014)

摘　　要：随着常规油气资源的枯竭,超低渗透油藏已成为我国能源增储上产的主要物质基础.其中相对渗透率曲线对油田开发起到至关重要的作用.而微观孔喉结构对相对渗透率影响巨大.但是目前的相对渗透率的计算方法无法体现微观孔喉结构的影响.因此利用通过室内物理实验的结果,通过修正Brooks-Corey模型建立了考虑边界层、贾敏效应和微观孔喉分布的相对渗透率计算方法.结果表明,相同渗透率的长庆超低渗透油藏孔喉分布范围更大,导致长庆超低渗透油藏两相区更宽,油相相对渗透率更大,高含水阶段相渗变化更剧烈.对于大庆和长庆超低渗透油藏的成功开发奠定了坚实的理论基础.As conventional oil and gas resources are exhausted ,ultralow permeability reservoirs are the basis of the energy in the country .Relative permeability curves are the key factor to development .Micro pore and throat structure has a significant effect on relative permeability curves .However ,existing methods to calculate permeability curves cannot take micro pore and throat structure into consideration .T herefore in this paper a new method considering the effect of boundary ,Jamin and micro porethroat distribution is established by modified BrooksCorey model .It is found that compared to ultralow permeability reservoir of Daqing Field ,Daqing Field has a wider distribution of pore and throat .As a result ,the region of two phase of Changqing Field is wider .Oil relative permeability of Changqing Field is larger .Relative permeability curve of Changqing Field changes more seriously when water cut is high .That is the theoretical basis to the successful development for Changqing and Daqing Field .

关 键 词：超低渗透油藏 孔喉分布 边界层 贾敏效应 相对渗透率 

分 类 号：TE312[石油与天然气工程—油气田开发工程]