Application Of MDT Technology In Reservoir Evaluation Of Daqing Oilfield

Modular formation dynamics tester(MDT)has obvious advantages in the measurement of formation permeability,PVT sampling of reservoir fluid,determination of reservoir pressure profile and fluid identification.It is of great superiority and direct guidance for the exploration of complex reservoir and the understanding of complex reservoir in the coexistence of multiple oil and water systems.However,the core of the MDT test data interpretation method is unique to the Schlumberger Corp,limiting the domestic use of MDT test data.Therefore,a new generation of wireline formation test data quantitative interpretation technology is studied.This paper through the study of percolation mechanics theory,mathematical model of the testing process;the relationship by changing the mathematical theory for calculating formation pressure and formation parameters;relationship by discrete mathematics means to change and formation,solving the formation pressure of fluid properties;through the establishment of space and time discrete three-dimensional,three-phase state matter conservation model,success develop MDT test tool(CM-fine second small scale numerical method).On the basis of innovation to achieve the value "to various MDT testing process really" simulation,solving the parameters accurately and reliably,so as to realize the true formation of the material,the MDT test data to maximize the use of interpretation.This paper expounds the principle of spectrum identification of reservoir fluid,mastered the core technology secrets of foreign companies;on this basis,developed with independent characteristics of the resistivity contrast method,fluid conversion spectrum recognition template method,trend analysis and formation pressure profile method and other kinds of reservoir fluid identification method.Research and development of independent intellectual property rights of the MDT test data interpretation software,software has powerful three-dimensional three-phase numerical simulator,not only has the function of equivalence with foreign company software,but also can be integrated to fit the pressure curve,the inversion of reservoir parameters in oil field,has been widely used to,through the contrast function,comprehensive water equivalence the recognition effect and pressure profile,software performance even better than similar foreign products.The research has a high academic value and practical value,since 2015 completed MDT test data of 120 wells in Daqing oilfield all interpretation task,forming method,software and standards in the field of national promotion and application.The research results play an active role in improving the exploration efficiency and reducing the cost of the complex oil and gas reservoirs.