低渗透致密油藏可动流体饱和度计算方法——以板桥地区长6油层组致密油储层为例  

A Method to Determine Movable Fluid Saturation of Low-permeability and Tight Oil Reservoirs ——By Taking Tight Oil Reservoirs in Sixth Member of Yanchang Formation in Banqiao Area As An Example

作　　者：曹雷[1] 孙卫[1] 盛军[1] 霍磊[1] 陈强[1] 谢彩花 

机构地区：[1]大陆动力学国家重点实验室(西北大学)西北大学地质学系,陕西西安710069 [2]中石油青海油田分公司采油三厂,青海海西州816400

出　　处：《长江大学学报（自科版）（中旬）》2016年第7期1-8,共8页Journal of Yangtze University(Nature Science Edition)

摘　　要：针对核磁共振试验获得低渗透致密油储层可动流体饱和度成本高、周期长、应用受限等弊端,深入分析了低渗透致密油储层可动流体饱和度的影响因素。结合恒速压汞、高压压汞等试验提出了计算致密油可动流体饱和度的方法。结果表明:低渗透致密油储层可动流体饱和度与恒速压汞总进汞饱和度、黏土矿物绝对含量相关性较好,将计算值与实测值比较,2种方法获得的可动流体饱和度差值小于5%,计算误差平均为3.76%。计算结果与实测结果较为符合,表明该方法适用可靠。计算研究区长6油层组致密油储层可动流体饱和度平均为37.6%,按照储层可动流体饱和度划分标准,研究区以Ⅲ类储层为主。In allusion to the disadvantage of high cost,long cycle and restricted application of movable fluid saturation of tight oil reservoirs obtained from NMR technology,the main factors influencing the movable fluid saturation in tight oil reservoirs were analyzed.Combined with constant-speed mercury injection and high-pressure mercury injection experiments,a method to determine movable fluid saturation of tight oil reservoirs was proposed.The results show that the movable fluid saturation of tight oil reservoirs is well correlated with the total mercury saturation of constant-speed mercury penetration and absolute content of clay content,compared the calculated values with measured values,the difference between saturation of 2movable fluids is less than 5%,the average error is 3.76%.The calculated results is coincident with that of tested result,it indicates that the method is applicable and reliable.The calculation results indicated that the average movable fluid saturation of tight oil reservoirs in the sixth member of Yanchang Formation in Banqiao Area is 37.6%,According to the standard of movable fluid saturation,the tight oil reservoirs in the study area are mainly TypeⅢreservoirs.

关 键 词：致密油 恒速压汞 高压压汞 可动流体饱和度 板桥地区 

分 类 号：TE122.2[石油与天然气工程—油气勘探] TE311