华庆油田低渗透砂岩储层可动流体饱和度及其影响因素  

Study on Saturation of Movable Fluid in the Low-permeability Sandstone Reservoirs of Huaqing Oilfield and Its Influencing Factors

作　　者：屈雪峰[1] 孙卫[2,3] 雷启鸿[1] 黄海[4] 霍磊[2,3] 

机构地区：[1]长庆油田分公司勘探开发研究院,陕西西安710018 [2]大陆动力学国家重点实验室,陕西西安710069 [3]西北大学地质学系,陕西西安710069 [4]西安石油大学石油工程学院,陕西西安710065

出　　处：《西安石油大学学报（自然科学版）》2016年第2期93-98,共6页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项"大型油气田及煤层气开发"(编号:2011ZX05044);陕西省科技统筹创新工程计划项目(编号:2015KTCL01-09);陕西省教育厅科研计划项目(编号:15JS086)

摘　　要：利用核磁共振、铸体薄片、恒速压汞等实验资料分析华庆油田长81储层可动流体赋存特征及影响因素。结果表明:不同物性岩心的T2谱形态表现为3种类型;可动流体饱和度低且级差较大,可动流体孔隙度非均质性强于可动流体饱和度,渗透率对可动流体参数的敏感性显著强于孔隙度;矿物成分成熟度、胶结及溶蚀作用是可动流体赋存特征的重要影响因素,面孔率是影响可动流体赋存特征的关键参数;喉道具有连通性与储集性,喉道结构特征是引起微观孔隙结构内部非均质性的关键因素,喉道结构特征的优劣直接体现在喉道的结构形态、分布尺度、大小、类型、分选性方面。喉道半径及结构特征制约着可动流体赋存特征。The existing characteristics and the influencing factors of the movable fluid in the low-permeability sandstone reservoir of the first layer of the eighth member of Yanchang Formation in Ordos Basin are analyzed based on nuclear magnetic resonance,casting thin section and constant-speed mercury injection data. The results show that there are three types of T2 spectral patterns of the samples with different physical properties; the movable fluid saturation is relatively low and its range is wide,the heterogeneity degree of the movable fluid porosity is stronger than that of the movable fluid saturation,and the sensitivity of reservoir permeability to the movable fluid parameters is higher than that of reservoir porosity; the compositional maturity cementation and dissolution of the minerals are the most important influence factors of the existing characteristics of movable fluid in the reservoirs,and surface porosity is the key parameter to influence the existing characteristics of movable fluid; the throat has connection and storage capacity,the structural characteristics of throat is the key factor to influence the heterogeneity of the micro-pore structure,and its advantages and disadvantages can be reflected directly by the structure,the size distribution,the size,the type and the sorting of the throat. The radius and the structural features of throat restrict the existing characteristics of movable fluid.

关 键 词：可动流体赋存特征 非均质性 喉道结构特征 长81储层 华庆油田 

分 类 号：TE132.2[石油与天然气工程—油气勘探]