Considering the Phenomena of Water Conning in One of the Fractured Gas Reservoirs in Iran

Document Type : Research Paper

Authors

1 South Zagros Oil and Gas Production Company, Iranian Central Oilfields Company, NIOC, Tehran, Iran

2 IOR Institute, NIOC, Tehran, Iran

3 Mehran Engineering and well services Company, Tehran, Iran

Abstract

The permanent problems in production of oil and gas are water conning and water production. If one well is affected by this phenomenon, hydrocarbon production will be decreased and related costs will be increased. Researches prove that for any scenarios in production or development of a field, investigating the reservoir parameters is very indispensable (or necessary) in controlling water conning or delaying the breakthrough. Investigating the impact of key reservoir parameters on this phenomenon in one of the Iranian fractured gas field is the aim of this article. For this purpose, a synthetic model was constructed and simulated using real reservoir data in a radial system. Then, the effect of different reservoir parameters on the percentage of water cut production was analyzed. By comparing the results of the simulations, it is concluded that the injection of non-permeable fluid flow in the bottom layers of production formation decreased the percentages of water cut and increased the breakthrough. Also, it was proved that fracture permeability, the thickness of the gas column, gas flow rate, perforation position and aquifer strength are the most important parameters to occur and exacerbate  water conning. It was also concluded  that the less pressure drop was exerted on the reservoir,  and the water production was reduced by increasing the matrix porosity to fracture porosity.
 

Keywords

References

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Journal of Petroleum Research
Volume 27, 96-2 - Serial Number 93
May and June 2017
Pages 183-195

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