摘要
江汉油田周16井区属于高温高盐储层,且非均质性严重,在注水开发过程中部分油井出现受效差或见效后含水上升快的问题。为此,研制了嵌段聚醚类表面活性剂调驱体系,利用5组不同渗透率级差的天然岩心组合模型开展双管并联物理模拟驱油实验,考察该调驱体系对储层的适应性。结果表明:渗透率级差为3.2~10.9时,该体系能有效封堵高渗岩心,并提高综合驱油效率,最大增幅可达17.80个百分点;当渗透率级差大于5.0后,驱油效率增幅开始下降,级差为35.6时,增幅仅为8.60个百分点。该体系现场先导试验效果显著,井组日产油量由3.00t/d最高上升至8.43t/d,综合含水由93.18%下降至86.32%,截至2018年12月,累计增油达953.20t。该调驱体系在高温高盐油田具有推广应用价值。
The Well-block Zhou16 in Jianghan Oilfield is a high-temperature and high -salt reservoir with strong heterogeneity.Some production wells are characterized by poor waterflooding response or rapid rise of water-cut after water breakthrough during the waterflooding development stage.A block polyether surfactant profile-control and flooding system was prepared and the 5 sets of parallel physical simulation flooding experiments were carried out by using natural core samples with various permeability contrasts to evaluate the reservoir adaptability.Result indicates that this profile-control and flooding system could effectively plug the high-permeability core samples and enhance comprehensive oil displacement efficiency when the permeability contrast is 3.2~10.9,and the maximum increment of oil displacement efficiency is up to 17.80 percentage points.When the permeability contrast exceeds 5.0,the oil displacement efficiency increment decreases.The oil displacement efficiency increment is only 8.60 percentage points when the permeability is 35.6.The pilot test for this system shows a better performance,the wellgroup oil production rate is increased from 3.00 t/d to 8.43 t/d and the corresponding comprehensive water-cut decreases from 93.18% to 86.32%.The cumulative oil increment is up to 953.20 t by December 2018.This profile-control and flooding system indicates favorable popularization and application in the high-temperature and high-salt oilfields.
作者
张瑶
付美龙
侯宝峰
李亮
吴海俊
Zhang Yao;Fu Meilong;Hou Baofeng;Li Liang;Wu Haijun(Yangtze University,Wuhan,Hubei 430100,China;Sinopec Northwest Oilfield Company,Urumchi,Xinjiang 830000,China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2019年第5期164-169,共6页
Special Oil & Gas Reservoirs
基金
国家科技重大专项“缝洞型碳酸盐岩油藏堵水潜力评价方法及选择性堵剂体系研究”(2016ZX05014-005-006)
国家自然科学基金青年科学基金“纳米颗粒协同阳-非离子Gemini表活剂润湿反转体系的构筑及其机理研究”(51704036)
关键词
表面活性剂
调驱
渗透率级差
物模实验
江汉油田
surfactant
profile-control and flooding
permeability contrast
physical simulation experiment
Jianghan Oilfield
