Quantitative Gas Washing Evaluation on Reservoirs in TZ83 Well Block in
详细信息
- 责任者：Li Zhuo (State Key Laboratory of Petroleum Resources and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Jiang Zhenxue
- 刊名：Geoscience
- 出版年：2010
- 卷期：24(6)
- 关键词：油气藏 ; oil and gas reservoir ; 凝析气 ; condensate gas ; 塔里木盆地 ; Tarim Basin
- 页码：p.1171-1177
- 图表：3 illus., 2 tables, 28 refs.
- 分类号：1003
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
摘要
This paper analyzed the regional structure conditions, summed up the oil and gas properties and component characteristics, made the quantitative description of gas washing by carrying out the n-alkanes quantitative measurement and calculating the loss rate of n-alkanes (Q) in the TZ83 well block. The results of the loss rate of n-alkanes show that all reservoirs in the study area had experienced gas washing (range of Q is 12% to 86%), and the intensity of gas washing gradually decrease from the northwest to southeast in the plane and from deap to shallow in the cross section. Furthermore, during the gas washing, the lower carbon number n-alkane dissolved in gas and separated from oil, led to the formation of condensate gas reservoirs with high wax content. It is confirmed that the gas washing of high-maturity dry gas to TZ83 well block along the interchange of Tazhong 82 and the Tazhong No.1 slope break and provides quantitative evidence for the accumulation research.