Study Of Well Testing Monitoring Technology In Dongping Bedrock Gas Reservoir

As the nation's largest bedrock gas field,Dongping gas field is entered the stage of full production.In order to ensure smooth completion of the production capacity construction task,scientific and reasonable management field,rely on the natural ability to the greatest extent produced gas,it is an urgent need to matching the dynamic monitoring of well test technology.But domestic dynamic monitoring technology is mainly based on the conventional gas reservoir,and there is no dynamic monitoring and analysis technology in view of the bedrock gas reservoir.To this end,according to the percolation theory,when pressure up to be Pseudo steady-state,the design method of deliverability test for basement gas reservoir is determined by the formula calculation method,the production characteristic method and the data of drill testing and adjacent well.Reasonable off production time about pressure buildup test is established based on the relationship between the beginning time of radial flow and flow coefficient in Dongping gas field.Based on the analysis of the reasons for the abnormal condition of enrolling well testing data,the paper puts forward a method using three parameters to process data.Because the problem of various interpretations is more serious in transient testing,the paper puts forward a fine interpretation method by using the methods of deconvolution testing,numerical well testing and all pressure history matching,in order to ensure the correctness and accuracy of interpretation of model selection In order to ensure the accuracy of model selection and precision of interpretation.According to the standards for dynamic monitoring technical and the specification for dynamic analysis,the paper sets up the dynamic monitoring targets of different stages of development in gas reservoir,then determines the system of dynamic monitoring and the various principles of dynamic monitoring for well selection for Dongping gas reservoir according to the target.based on this,the paper compiles 2016 Dongping gas reservoir monitoring program.The paper determines the characteristics and distribution about percolation model in Dongping gas reservoir by using statistical methods.The decline analysis method was adopted to determine the changing characteristics of yield and pressure.The main formation water source of Dongping gas reservoir is determined by integrated water source analysis method which combine water sample analysis methed,quantitative calculation of condensate water methed and production characteristics methed.Study results show that the method of this paper is fully able to meet the needs of dynamic monitoring of basement gas reservoir of Dongping.The application effect of 23 wells shows that the dynamic monitoring program is reasonable,the design to be meet the high rate compliance,and the reference rate is 100%.Basement gas reservoir of Dongping has the following characteristics.The reservoir presents multiple reservoir features.The formation pressure declines greatly.The yield presents the law of diminishing hyperbolic decline.The Dongping 1 well area is mainly composed of condensate water,water of longitudinal fissure water,and the energy of the water is weak.