Visual simulation experimental study on water invasion rulesof gas reservoir with edge and bottom water

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  • 1.University of Chinese Academy of Sciences,Beijing 100190,China;
    2.Institute of Porous Flow and Fluid Mechanics,Chinese Academy of Sciences,Langfang 065007,China;
    3.Langfang Branch,PetroChina Research Institute of Petroleum Exploration and Development,Langfang 065007,China

Received date: 2016-06-24

  Revised date: 2016-08-17

  Online published: 2019-09-09

Abstract

In view of the water invasion in development of gas reservoir with edge and bottom water,the visual physical experiment model is designed based on the main reservoir space characteristics of different types of gas reservoirs,and physical simulation experiment system is used to research the water invasion rules of pore type,fracture type,hole type and fracture-cavern type gas reservoir.The result shows that pore type gas reservoir recovery degree is high,the leading edge of water is approximately uniform advance,and water-gas ratio increases slowly after water breakthrough.Water goes in priority in a quick dash along the fracture,gradually invades matrix by the capillary force and block the gases in the matrix,so a large amount of gas is blocked in the fracture gas reservoir,which leads to sharp fall of fracture type gas reservoir recovery degree.The isolated holes and cracks in reservoir mainly provide storage space,and water first goes into the hole and slot,which has significant influence on local water invasion,but has little effect on the whole water invasion’s propulsion.The gas reservoir is linked by cracks and holes,water swiftly fills holes along the cracks.When the outlet contacts with the edge and bottom water through cracks and holes,gas reservoir will be shut down because of the water in a short time.At that time the gas reservoir only use the gases in the seams and holes.The results of research have important guidance and practical significance for the effective development of edge and bottom water reservoir.

Cite this article

Fang Fei-fei, Li Xi-zhe, Gao Shu-sheng, Xue Hui, Zhu Wen-qing, Liu Hua-xun, An Wei-guo, Li Cheng-hui . Visual simulation experimental study on water invasion rulesof gas reservoir with edge and bottom water[J]. Natural Gas Geoscience, 2016 , 27(12) : 2246 -2252 . DOI: 10.11764/j.issn.1672-1926.2016.12.2246

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