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- Title
裂缝性边水气藏水侵机理及治水对策实验.
- Authors
徐轩; 万玉金; 陈颖莉; 胡勇; 梅青燕; 焦春艳
- Abstract
Physical simulation experiment method is established and the experiments were carried out to investi- gate the main water control measures adopted in the development of fractured water-bearing gas reservoirs. The dynamic pressure drop profiles inside the gas reservoir are measured,the rules of gas well production regula- tion,reserves utilization mechanism and enhanced gas recovery efficiency under different water conditions and water control measures are compared and analyzed. The study shows that:(1)The same gas drainage measures may cause totally different practical results to the fractured water-bearing gas reservoirs with different water en- ergy:to reservoir with 40 times water body,drainage measures can increase gas recovery by 10.8%,when the reservoir with infinite water body,it can reduce by 15.6%.(2)Multi well synergistic water drainage measures are effective,when the energy of the water body is blocked,the water in the fractured reservoir will be dis- charged from the gas well under the driving of its own elastic energy and residual gas. The large reduction of wa- ter saturation may greatly improve the gas phase seepage capacity and make the water sealing gas flowing again, and increase recovery degree by about 10%-30%.(3)When fractures penetrate water and gas wells,water in- vades mainly by fractures to gas wells,and the water saturation in the surrounding matrix area increases only by 5%. Because of water blocking damage,there is still a lot of residual gas in the matrix. These non-producing re- serves are important material basis for carrying out measures to increase production.
- Subjects
WATER-gas; RESERVOIRS; WELL water; BODIES of water; DYNAMIC pressure; GAS reservoirs; GAS wells
- Publication
Natural Gas Geoscience, 2019, Vol 30, Issue 10, p1508
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2019.07.003