Development And Application Of Well Testing Interpretation Software For Fractured And Cavern Oil Reservoirs

Well testing analysis is an important method for reservoir engineers to understand reservoirs.It also becomes a very important part in the dynamic analysis of reservoirs.It is the most direct way to analyze the physical properties of underground fluids and identify the spatial distribution of hydrocarbon reservoirs.It is related to the final oil and gas evaluation effect of a hydrocarbon reservoir block,and It is also the key to further guide the formulation of development plans,adjustment plans,and implementation of a series of stimulation measures.For the well testing interpretation of carbonate reservoirs,especially the type of fracture-karst caves,the predecessors have devoted a lot of time and effort to the study,and they also proposed various flow models and theoretical curves,but The heterogeneity of the fractured hole type reservoir is very strong,and the shape of the double logarithmic curve of the test wells plotted on the basis of the site data is also extremely complex.The current well testing analysis techniques still have room to be improved in the application of fracture-cavity reservoirs.Therefore,the well testing of fracture-cavernous porous media reservoirs is further carried out,and a well testing model that is more in line with the geological characteristics of on-site reservoirs is established,and corresponding analysis methods are refined to provide technology for obtaining reservoir parameters,fluid parameters,and productivity evaluation.There is no doubt of great practical significance.This paper is to start with fracture-hole carbonate well test analysis theoretical model,from the site data processing,estimation of cave volume,the establishment of well testing model,the algorithm of parameter fitting,and the fitting of well testing curve.The research was conducted and the well testing interpretation software was developed.Combining the geological characteristics and well testing data of the Yingmai-Ruangu and Tazhong blocks,the developed well testing interpretation software was used to interpret the field data to obtain the corresponding stratum parameters and cavernous reserves of fracture-cavity reservoirs,which provide a solid theoretical basis and decision-making basis for reasonable and efficient development of the later period.