致密储油层综合分类评价定量方法  

Comprehensive Classification and Evaluation Method of Tight Oil Reservoirs

作　　者：张鹏 张金功[2] 霍苗 高波 ZHANG Peng;ZHANG Jingong;HUO Miao;GAO Bo(Research Institute,Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi'an,Shaanxi 710075,China;Department of Geology,Northwest University,Xi'an,Shaanxi 710069,China;College of Materials Science and Engineering,Xi'an Shiyou University,Xi'an,Shaanxi 710065,China;Seventh Oil Production Plant,Changqing Oilfield Company,Xi'an,Shaanxi 710200,China)

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710075 [2]西北大学地质学系,陕西西安710069 [3]西安石油大学材料科学与工程学院,陕西西安710065 [4]长庆油田分公司第七采油厂,陕西西安710200

出　　处：《西安石油大学学报（自然科学版）》2020年第2期13-19,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：陕西省统筹创新项目(2016KTCL01-12);陕西省科技新星资助项目(2016KJXX-42)。

摘　　要：为了有效评价致密储油层,提出了以可动流体百分数、主流喉道半径、岩石脆性指数、润湿指数、原油黏度、黏土矿物含量、启动压力梯度、地层压力系数8个参数作为致密储油层综合评价关键参数,建立了致密储油层八元综合分类系数定量评价方法,将致密储层分为Ⅰ、Ⅱ、Ⅲ、Ⅳ类。并将该评价方法应用于鄂尔多斯盆地三叠系延长组长7致密储油层。应用结果表明,该油层Ⅲ类致密储层居多,Ⅱ类次之。利用实际生产动态数据进行了验证,评价结果准确性较高。In order to evaluate tight reservoirs effectively,it is proposed that 8 parameters of movable fluid percentage,mainstream throat radius,rock brittleness index,wettability index,crude oil viscosity,clay mineral content,starting pressure gradient and formation pressure coefficient are as key parameters for comprehensive evaluation of tight reservoirs,a quantitative evaluation method of tight reservoirs by eight component comprehensive classification coefficient is established,and the tight reservoirs are divided intoⅠ,Ⅱ,ⅢandⅣtypes.The method is applied to Chang 7 tight reservoir of Yanchang Formation of Triassic in Ordos Basin.The evaluation result shows thatⅢtype is the most in the tight reservoir,andⅡtype is the second.At the same time,this method is verified using actual production performance data,it is shown that it has a high accuracy.

关 键 词：致密储油层 储层评价 参数优选 综合评价方法 鄂尔多斯盆地 

分 类 号：TE122.3[石油与天然气工程—油气勘探]