| The distribution of gas and water is very complex in Jingbian gas field,and there is the phenomenon of water production and liqiud loading,so the accurate calculation of gas well dynamic reserves has the certain difficulty.In this paper,an accurate calculation and analysis of dynamic reserves is given in water production gas wells in the field.The dynamic reserves of 74 water production gas wells of Jingping 05-8 wellblock are analyzed in detail in this paper,first of all,the geological characteristics of the block and gas reservoir fluid temperature pressure characteristics are analyzed and described,and all of the gas well production performance and the production system are analyzed and studied,and the feature of water production and the effusion of water produced wells are summarized,then gas well dynamic reserves were calculated by pressure-drop method and elastic two-phase method and unbalance analyzing method and cumulative production method.The results were compared.Combined with the production system and production performance of gas wells,we make sure that unbalance analyzing method is an accurate method to calculating the dynamic reserves of wells.The paper analyses the different of the dynamic reserves of different wells,and conclude the weight of factors affecting gas well dynamic reserves.Gas wells are classified,and based on the relevant data of geological modeling,the effect factors of dynamic reserves has carried on the qualitative analysis,and then we calculate the reserves producing degree and the reasonable allocation of each well.Accurate dynamic reserves prediction of water production wells results play a positive role in produced degree evaluation and development potential evaluation guidence.This paper can provide some reference for other water production wells of Jingbian gas field. |
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