西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (6): 101-104.DOI: 10.3863/j.issn.1674-5086.2009.06.022

• 石油与天然气工程 • Previous Articles     Next Articles

APPLICATION OF TRY AND DERROR METHOD TO TREATMENT ON WELLHEAD PRESSURE BUILD UP CURVE ABNORMALITY OF GAS WELL

SU Yun-he1 DU Zhi-min1 GUO Xiao1 LAN Sheng-wu2 SONG Hai-jing3   

  1. 1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation，Southwest Petroleum University，Chengdu Sichuan 610500，China；2.The Fourth Low-permeability Reservoir Department,Changqing Oilfield Company，CNPC，Qingyang Gansu 745000，China；3.Langfang Branch of RIPED,Langfang Hebei 065007,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-12-20 Published:2009-12-20

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Abstract: Aiming at phenomenon of abnormal gas well shut down pressure build-up curve (i.e.,bottom hole pressure goes up while wellhead pressure goes down after the well is shut down),the bottom hole pressure calculation model is modified based on the practical test data and existing literature.By means of try and derror method,from two aspects if or not well stream composition changes while shutting down the well,the well head pressure build-up curve is corrected.Case study shows the method can eliminate the influence of gas well head pressure build-up curve abnormality on well test interpretation,and it provides a reference to the gas wells with same or similar well stream composition.The result plays a foundation for well test interpretation and dynamic calculation.

Key words: try and derror method, pressure build-up, abnormal, temperature, relative gravity, high sulfur content gas reservoirs

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