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异常高温高盐碳酸盐岩油藏水驱波及控制技术实验研究 ——以阿布扎比X油田为例
刘阳,吴行才,管保山,叶银珠,许寒冰,王小聪,李世超,肖沛文
0
(中国石油勘探开发研究院,北京100083)
摘要:
阿布扎比X碳酸盐岩油田因异常高温、高盐且非均质性强,导致水驱严重不均,常规的化学堵水调剖和提高采收率技术方法难以适用。采用该油田碳酸盐岩岩心、原油和模拟地层水,选择以新型颗粒型聚合物(SMG)水分散液为驱替相的水驱波及控制技术,开展SMG理化性能、驱油机理和物理模拟实验,对该技术在阿布扎布碳酸盐岩油田的可行性进行室内研究。结果表明:SMG水分散液具有低黏、易注入、易深部运移以及较好滞留能力和封堵性能的特点;其在一定程度上弥补了传统聚合物驱油机理缺陷和矿场应用受限的问题;在油田储层条件下表现出较好的耐温耐盐性能,在长达6个月的异常高温高盐老化后,表现出较好的热稳定性;老化后的SMG仍具有提高水驱波及体积和提高油藏综合采收率的性能,亚毫米级和微米级SMG提高采收率增幅分别为6.70%和5.67%。SMG水 分散液波及控制技术可高效控制储层水驱波及方向、提高水驱波及效率,有望解决阿布扎比地区异常高温高盐碳酸盐岩油田水驱不均的开发问题。
关键词:  异常高温高盐  碳酸盐岩油藏  波及控制技术  新型颗粒型聚合物  驱油机理  提高采收率  阿布扎比
DOI:10.13673/j.cnki.cn37-1359/te.2021.01.009
基金项目:国家科技重大专项“高含水油田提高采收率新技术”(2016ZX05010)。
Experiment on water-flooding sweep control technique for carbonate reservoir with abnormally high temperature and high salinity:A case study of Abu Dhabi X Oilfield
LIU Yang,WU Xingcai,GUAN Baoshan,YE Yinzhu,XU Hanbing,WANG Xiaocong,LI Shichao,XIAO Peiwen
(Research Institute of Petroleum Exploration & Development,CNPC,Beijing City,100083,China)
Abstract:
Nowadays,Abu Dhabi X carbonate oilfield is confronted with serious heterogenity water-flooding problems caused by abnormally high temperature and high salinity as well as severe heterogeneity. It is difficult to solve these problems with conventional water shutoff & profile control and EOR methods. In this work,a novel Soft Microgel(SMG)aqueous dispersion was selected as the displacement phase for the water-flooding sweep control technique. The natural core and crude oil from Abu Dhabi X carbonate oilfield and simulated formation water were used in the experiment to perform the analysis of SMG physical and chemical performance,research on SMG oil displacement mechanism and physical simulation experiment on oil displacement. The results indicate that the SMG aqueous dispersion has the characteristics of low viscosity,easy injection,easy deep migration,and excellent ability of retention and shutoff. To some extent,it can make up for the defect of traditional polymer flooding mechanism and overcome the limitation of oilfield application. The excellent thermal stability of SMG has been proved by six months of abnormally high temperature and high salinity aging test,demonstrating its outstanding resistance to high temperature and high salinity under reservoir conditions. Furthermore,the SMG after aging is still able to improve the water-flooding swept volume and enhance the integrated recovery of the reservoir. According to the results,the EORs of submillimeter-scale SMG and micron-scale SMG increased by 6.70% and 5.67%,respectively. To sum up,the water-flooding sweep control technique with SMG aqueous dispersion as the displacement phase can effectively control the sweep direction of water-flooding in reservoirs and improve the sweep efficiency of water flooding,for which it is expected to solve the development problem of uneven water-flooding in abnormally high temperature and high salinity reservoirs in Abu Dhabi.
Key words:  abnormally high temperature and high salinity  carbonate reservoir  sweep control technique  novel Soft Microgel  oil displacement mechanism  EOR  Abu Dhabi

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