Study Of Reservoir Method And Software Development For Fractured-Vuggy Carbonate Reservoirs

The oil reserves of fractured-vuggy carbonate reservoirs are very large,Many traditional reservoir engineering methods,such as dynamic analysis of injection-production and recovery prediction,are not applicable to the fractured-vuggy carbonate reservoirs due to the strong heterogeneity and discrete nature of reservoirs.By researching a large number of literature,the paper sumerized existed engineering methods,developed and correted some method and introduced some new methods,finally programmed these method in the fractured-vuggy carbonate reservoirs production management software.This software can guide the work on oilfiled better.The main research contents of this paper are as follows:(1)To study the geological characteristics,production characteristics and mechanism,and stimulation measures of fractured-vuggy carbonate reservoirs by investigating the existing data.(2)Calculate the development technical limit index of fracturedvuggy carbonate reservoirs.these calculating of index include reserve calculation,energy evaluation and water breakthrough time.flow material balance method and multiply-tanks model are introduced first to fractured-vuggy carbonate reservoirs in the reserve calculation.In the energy evaluation part,an system of energy evaluation index is established.a more suitable method for calculating water breakthrough time in reservoir is proposed.(3)The production performance of fractured-vuggy carbonate reservoirs is analyzed.These performance includes the rule of water ratio,water oil displacement,controling the rise of bottom water.Genetic algorithm,particle swarm optimization and support vector machine are used to predict the rising law of bottom water.For water oil displacement and controling the rise of bottom water.the index system for effect evaluation is established,the soaking time is determined,and the existing water injection indication curve is improved for suiting the fractured-vuggy carbonate reservoirs,Water drive curves of 33 Wells in unit S80 were established for juging reservoir type.(4)The production decline of fractured-vuggy carbonate reservoir is analyzed.In this section,apart from some traditional production prediction methods,the unique decline curves such as tensile index model and Li-horne model,are proposed for reservoir.(5)Based on the above theory,using VB.NET,the production management system of carbonate fracture-vuggy reservoir is developed,which can be used to guide the field production of fractured-vuggy carbonate reservoir.By the research,development technical limit index of fractured-vuggy carbonate reservoirs is caculated.The production performance of fractured-vuggy carbonate reservoir and the production decline of fractured-vuggy carbonate reservoir are analyzed.Based on the above theory,using VB.NET,the production management system of carbonate fracture-vuggy reservoir is developed,which can be used to guide the field production of fractured-vuggy carbonate reservoir.