应用稀有气体同位素判识油田水淹现象——以辽河盆地黄沙坨油田为例

IDENTIFYING THE PHENOMENA OF WATER FLOOD IN OIL FIELDS USING NOBLE GAS ISOTOPE——EXAMPLED BY THE HUANGSHATUO OILFIELD IN THE LIAOHE BASIN

张晓宝 史朋 马素萍 李传浩 戴本亮 张瑞 段国禄 宋成鹏 王宏勇

Zhang Xiaobao Shi Peng Ma Suping Li Chuanhao Dai Benliang Zhang Rui Duan Guolu Song Chengpeng Wang Hongyong

中国科学院, 地质与地球物理研究所, 气体地球化学重点实验室, 兰州, 730000 2. 中国科学院, 地质与地球物理研究所, 气体地球化学重点实验室, 兰州, 730000 中国科学院, 研究生院, 北京, 100049 3. 中国石油, 长庆油田公司, 第三采油厂, 宁夏, 银川, 750006 4. 中国石油, 辽河油田公司, 采油一厂, 辽宁 5. 中国石油, 青海油田公司, 勘探开发研究院, 青海, 敦煌, 736202

Key Laboratory of Gas Geochemistry, Institute of Geology and Geophysics, Chinese Academy of Science, Lianzhou, Gansu 730000, China 2. Graduate School of Chinese Academy, Beijing 100049, China 3. Chang Qing Third Oil Recovery Factory, CNPC, Ningchuan, Ningxia 750006, China 4. Liaohe First Oil Recovery Factory, CNPC, Liaoning, China 5. Research Institute of Petroleum Exploration and Development, Qinghai Oil Field, CNPC, Dunhuang, Qinghai 736020, China

采集了辽河盆地黄沙坨油田注水开采所利用的水源井水、处理后的水源井水、注水井水和生产井原油样品,脱附了其中的水溶气和油溶气,测量了其3He/4He,4He/20Ne和40Ar/36Ar,发现它们可以判识生产井水淹现象和水淹程度。研究表明:(1)黄沙坨油田水源井、处理后的水源井水及注水井中水3He/4He4、He/20Ne和40Ar/36Ar均具有大气成因的特征;(2)黄沙坨油田原油40Ar/36Ar误差范围内与空气值接近,说明原油遭受了水淹,40Ar/36Ar可以成为油田遭水淹的示踪剂,但它与4He/20Ne之间没有线性关系,因此不能反映油田受水淹的程度;(3)黄沙坨油田原油4He/20Ne和3He/4He大于大气值,且两者呈较好的线性关系,说明其不但可以作为生产井油层遭受水淹的示踪剂,也可作为油层遭受水淹程度的指标。

The source water for water injection,source water after procession,water of an injection well,and oil crude of a production well were sampled and degassed.The 3He/4He,4He/20Ne and 40Ar/36Ar of the gases from the waters and oils were analyzed.We found that they can be used for identifying the phenomena and degree of water flood of a production well.Our research shows that the 3He/4He,4He/20Ne and 40Ar/36Ar of the source water for water injection,source water after procession and water of an injection well characterize an atmosphere source.The 40Ar/36Ar of crude oil in the Huangshatuo oil field is near that of the air in an error range,indicating that it was flooded by water and can be used as a tracer of water flood in an oil field,however it has no relation with 4He/20Ne and can not be used for reflecting the degree of water flood.The 4He/20Ne and 3He/4He of the oil from the Huangshatuo oil field were larger than those of air and they have a better liner relation,indicating they can be used for tracing water flood and its degree of an oil bed in a production well.

国家基金面上项目“稀有气体作为油气田开发示踪剂的基础理论与应用研究”资助(40472971)

https://doi.org/10.11781/sysydz200903258