Oil & Gas Geology ›› 2016, Vol. 37 ›› Issue (2): 256-260.doi: 10.11743/ogg20160214

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Evaluation of development effect of cluster horizontal wells in Daniudi gas field,Ordos Basin

Wu Jianbiao1, Liu Xugang1, Bai Xiaoxia2, Yu Yaonan1, Gao Peng3   

  1. 1. Exploration and Development Research Institute, SINOPEC North China Company, Zhengzhou, Henan 450006, China;
    2. Dingbian Production Plant of Yanchang Oilfield Co., Ltd, Yulin, Shaanxi 718600, China;
    3. No. 2 Oil Production Plant, Daqing Oilfield Conpany, PetroChina, Daqing, Heilongjiang 163257, China
  • Received:2015-12-20 Revised:2016-02-20 Online:2016-04-08 Published:2016-04-29

Abstract: Almost all the quality gas reserves of Daniudi gas field have been produced.The remaining gas reserves are low in quality, thus cannot be developed efficiently with vertical wells.Considering the strong heterogeneity, limited sizes of effective sandbodies, low reserves abundance and low single well production rate of the tight sandstone layers, horizontal wells are preferred for the development of the remaining gas reserves.Cluster horizontal well group plays a key role in the practical production.Numerical simulation and dynamic evaluation are integrated to evaluate the exploitation performance of Daniudi gas field with different patterns of cluster horizontal well groups by comparing the pressure drawdown rate and gas production per pressure drop unit.The results demonstrate that the angle between the laterals and maximum principal stress should be larger than 60 degrees, and the minimum distance between these wells should be greater than 500 meter when using horizontal wells cluster group as the development strategy.These understandings will provide a useful reference for the exploitation of similar tight marginal gas fields in Ordos Basin and other basins.

Key words: cluster horizontal wells, numerical simulation, development effect, Daniudi gasfield, Ordos Basin

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