层状边水砂岩油藏天然水驱开发规律实验研究  

Experimental Study on Development Law of Natural Water Flooding of Layered Edge Water Sandstone Reservoirs

作　　者：张钰祥 杨胜来 庞洁琼 吴向红[2] 廖长霖 冯敏[2] 王敉邦 ZHANG Yuxiang;YANG Shenglai;PANG Jieqiong;WU Xianghong;LIAO Changlin;FENG Min;WANG Mibang(State Key Laboratory of Oil and Gas Resources and Exploration,China University of Petroleum (Beijing),Beijing 102249,China;African Institute,PetroChina Research Institute of Exploration & Development,Beijing 100083,China)

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油勘探开发研究院非洲研究所,北京100083

出　　处：《西安石油大学学报（自然科学版）》2020年第6期45-53,共9页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金项目“超深层碎屑岩油气藏渗流物理基础研究”(51774300);国家科技重大专项“CO2驱油与埋存关键技术”(2016ZX05016-006-004)。

摘　　要：为探究边水规模对天然水驱开发规律的影响,以南苏丹层状边水砂岩油藏P为原型,采用自主设计的天然水驱实验装置,进行了不同边水体积的天然水驱实验,模拟地层温度和压力下边水能量衰竭驱替过程。实验结果表明:可依据采出程度变化将边水分为3类:Ⅰ类边水主要通过提高平面波及系数增加采出程度,Ⅱ类边水通过提高平面驱油效率增加采出程度,Ⅲ类边水能量较高,水侵速度较高,易产生高渗通道,导致采出程度小幅度下降。根据实验结果,对于发育Ⅰ类和Ⅱ类边水的油层,在天然水驱开发后,建议将因水淹关闭的低部位生产井转为注水井,在剩余油分布集中的油藏中部位和高部位加密生产井以解决剩余油平面分布不均的问题;对于发育Ⅲ类边水的油层,在天然水驱开发时,建议采取合适的堵水措施以预防高渗通道的出现。In order to explore the influence of the scale of edge water on the development law of natural water flooding,taking the layered sandstone reservoir P with edge water in South Sudan as a prototype,the natural water flooding experiments under different edge water volume are carried out using self-designed natural water flooding experimental device to simulate the edge water energy depletion displacement process under different formation temperatures and pressures.The experimental results show that the edge water can be divided into three categories according to the change of recovery percent.TypeⅠof edge water mainly increases the recovery percent by increasing the plane sweep efficiency.TypeⅡof edge water increases the recovery percent by increasing the plane oil displacement efficiency.TypeⅢof edge water has higher energy and higher water influx speed,which is easy to form high permeability channels in reservoir,resulting in a small decrease in recovery percent.According to the experimental results,it is suggested after the natural water flooding development of oil layers with typeⅠand typeⅡof edge water,to convert the flooded production wells at the low position of reservoir into water injection wells,and to increase the density of production wells at the middle position and high position of the reservoir where remaining oil is abundant to solve the problem of uneven plane distribution of remaining oil;in the natural water flooding development of oil layers with typeⅢof edge water,to adopt appropriate water plugging measures or to reduce production pressure difference to prevent the appearance of high permeability channels.

关 键 词：天然水驱开发 层状边水砂岩油藏 边水体积 水侵速度 平面波及系数 平面驱油效率 

分 类 号：TE341[石油与天然气工程—油气田开发工程]