水侵对低渗水驱气藏水平井产量的影响

doi:10.3969/j.issn.1673-8926.2015.04.017

LITHOLOGIC RESERVOIRS ›› 2015, Vol. 27 ›› Issue (4): 113-118.doi: 10.3969/j.issn.1673-8926.2015.04.017

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Effect of water invasion on production of horizontal well in low permeability water drive gas reservoir

Yuan Lin¹， Li Xiaoping²， Wang Changqing³

1. Northeastern Sichuan Gas Production Plant ， Southwest Oil and Gas Field ， Sinopec ， Langzhong 637402 ， Sichuan ， China ；2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ， Southwest Petroleum University ， Chengdu 610500 ， China ；3. No. 1 Gas Production Plant ， PetroChina Changqing Oilfield Company ， Jingbian 718500 ， Shannxi ， China

Online:2015-07-20 Published:2015-07-20

Abstract

Abstract:

During the developing of low permeability water drive gas reservoir, even if water did not breakthrough at the bottom of the horizontal well, local water invasion was still an important factor for affecting the production of horizontal well. Based on the Joshi method, this paper simplified the three-dimensional seepage field of horizontal well into two two-dimensional seepage fields, namely the zone far from well and near wellbore, considering the local water invasion in the zone far from well and flow characteristic in low permeability gas reservoir, used the method of conformal transformation to build a new model for studying the production change law of horizontal well during the water invasion in low permeability water drive gas reservoir. Sensitivity analysis indicates that as the increasing of gas-water volume ratio, distance of water advance and stress sensitivity index, the production of horizontal well decreases, while as the increasing of primary formation permeability and slip factor, the production of horizontal well also increases, unless in the high pressure gas reservoir, water-bearing gas reservoir and gas wells with lower producing pressure drop, the effect of slippage effect and stress sensitivity on production can be neglected. This study can provide a new solution to study production change law of horizontal well during water invasion in low permeability water drive gas reservoir.

Key words: sedimentary characteristics, Late Cretaceous, Paleogene, Junggar Basin

Yuan Lin， Li Xiaoping， Wang Changqing. Effect of water invasion on production of horizontal well in low permeability water drive gas reservoir[J].LITHOLOGIC RESERVOIRS, 2015, 27(4): 113-118.

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