A calculation model for water breakthrough time of gas wells in gas reservoirs with edge water considering the heterogeneity between reservoirs: A case study of the Lower Triassic Feixianguan gas reservoirs in the Puguang Gas Field

被引：0
作者：
Li J. [1 ]
Yang S. [1 ]
Qi Z. [1 ]
Zhao G. [1 ]
Yin B. [1 ]
Mo F. [1 ]
机构：
[1] Chongqing Municipality Key Laboratory of Complex Oil & Gas Field Exploration and Development, Chongqing University of Science and Technology, Chongqing
来源：
Natural Gas Industry | 2020年 / 40卷 / 04期
关键词：
Calculation model; Commingled production; Dart coefficient; Early Triassic; Gas reservoir with edge water; Puguang Gas Field; Reservoir's interlayer heterogeneity; Sichuan Basin; Water breakthrough time;
D O I：
10.3787/j.issn.1000-0976.2020.04.008
中图分类号：
学科分类号：
摘要：
The existing models for calculating the water breakthrough time of gas wells in gas reservoirs with edge water ignore the effects of reservoir's interlayer heterogeneity, so their calculation results are more deviated from the actual water breakthrough time of gas wells. As a result, they cannot accurately and effectively guide the adjustment of gas well production system and the formulation of technical water control measures. In this paper, a water-flooding seepage experiment of parallel core was conducted by taking the gas reservoir with edge water of Lower Triassic Feixianguan Formation in the Puguang Gas Field of the Sichuan Basin as an example. Then, the effects of edge water inrush caused by the interlayer heterogeneity of reservoir on water breakthrough time of gas wells was analyzed by means of reservoir numerical simulation. Based on this, the inrush coefficient was introduced to characterize the interlayer heterogeneity of reservoir, and a model for calculating the water breakthrough time of gas wells in the commingled gas reservoir with edge water considering the influence of interlayer heterogeneity was established. Finally, five wells in the gas reservoir of Feixianguan Formation in the Puguang Gas Field were selected for case calculation. And the following research results were obtained. First, the the interlayer heterogeneity of gas reservoir results in edge water burst. And the stronger the interlayer heterogeneity, the more severe the edge water coning and the sooner the water breakthrough. The water breakthrough time of gas wells depends on the water breakthrough time in the reservoir with the highest permeability. Second, a model for calculating the water breakthrough time of gas wells in the gas reservoirs with edge water considering the influence of reservoir interlayer heterogeneity is established based on the seepage theory. And the relative errors of its calculation results is in the range of -3.43-4.70%, which can satisfy the accuracy requirement of engineering errors. In conclusion, this newly established model can provide an effective method for accurately calculating the water breakthrough time of the gas well in the commingled gas reservoir with edge water. Furthermore, it is conducive to the adjustment of the production system of gas wells in the gas reservoir with edge water and the formulation of technical water control measures. © 2020, Natural Gas Industry Journal Agency. All right reserved.
引用
收藏
页码：69 / 76
页数：7
相关论文
共 22 条
  • [1] Hu S., Li J., Jiang N., Et al., Experimental study on dynamic reserves loss by water invasion in water-driven gas reservoirs, Special Oil & Gas Reservoirs, 24, 5, pp. 146-149, (2017)
  • [2] Huang X., Guo X., Lu X., Et al., Mathematical model study on the damage of the liquid phase to productivity in the gas reservoir with a bottom water zone, Petroleum, 4, 2, pp. 209-214, (2018)
  • [3] Li J., Hu S., Yang S., Et al., Mathematical productivity model for the gas well with water production in water-flooding gas reservoir, Special Oil & Gas Reservoirs, 25, 5, pp. 89-92, (2018)
  • [4] Li J., Sun L., Xiang Y., Et al., Description and prevention & control technical countermeasures of water flooding risk in water-drive gas reservoirs, Natural Gas Industry, 39, 5, pp. 79-84, (2019)
  • [5] Zheng Y., Duan Y., Wei M., Analysis method for the production data of water drive gas reservoirs and its application, Journal of Southwest Petroleum University (Science & Technology Edition), 41, 4, pp. 99-106, (2019)
  • [6] Qi Z., Li J., Hu S., Et al., Mathematical model for prediction of dynamic reserves loss due to water invasion in water-drive gas reservoir, Journal of Porous Media, 22, 12, pp. 1507-1518, (2019)
  • [7] Feng X., Peng X., Li L., Et al., Influence of reservoir heterogeneity on water invasion differentiation in carbonate gas reservoirs, Natural Gas Industry, 38, 6, pp. 67-75, (2018)
  • [8] Wu K., Li X., A new method to predict water breakthrough time in an edge water condensate gas reservoir considering retrograde condensation, Petroleum Science and Technology, 31, 17, pp. 1738-1743, (2013)
  • [9] Li J., Chai X., Deng C., Et al., Early-stage water control technology in improving the development efficiency of water drive gas reservoirs, Natural Gas Industry, 37, 8, pp. 132-139, (2017)
  • [10] Li K., Hu S., Zhang J., Et al., A new type water flooding characteristic curve and its application, Reservoir Evaluation and Development, 9, 2, pp. 13-16, (2019)
123