The Logging Research Of Chang 8 Reservoir Productivity Prediction In Ma Ling Oilfield

In recent years,in accordance with the Changqing Oilfield Company ideas,increase the lower Triassic strata chang 8 layer exploration evaluation efforts,and actively promote the "double hundred" project and "Ma Lingchang 8 horizontal wells demonstration project",the implementation of the ×30 etc.eight rich region,found 7 favorable area as ×148 is developed to predict reserves of 3.5 million tons,100 million tons of oil field has begun to take shape.However,Maling Oilfield Logging interpretation model,interpretation chart establishment and improvement and productivity prediction chart establishment and application are blank,need to follow up on logging interpretation method research,improve the logging productivity prediction coincidence rate.Study offour main development zones include × 82,× 56-× 305,× 30 and × 148 of Chang 8 in the Maling oilfield as the research area,combining the rock physical experiment and theoretical method,mechanism research and statistical rules combining method of rock physics,logging geology in-depth study from phenomenon to essence,from point spread to area,to carry out the following five aspects: 1)analyse reservoirs logging response characteristics and study the relationship of lithology?property?eletric and oil containing characteristic;2)the logging data quality analysis and standardization;3)reservoir parameter for precise modeling;4)reservoir fluid property recognition method research;5)reservoir classification and log deliverability prediction method research.The following results are obtained after research: confirm the variation of oil bearing reservoir;establish the model to explain the complex quantitative reservoir of extra low permeability,the porosity and mud content ratio,pore structure index method to calculate the permeability of innovation;subdivision interpretation unit established the identification interpretation chart,identify oil and water limit value,the development of well logging interpretation coincidence rate of more than 95% to achieve the higher industry index;carry out pore structure evaluation based on the NMR logging data,formation reservoir classification and evaluation standard,established capacity refers to the evaluation method of the prediction method,NMR logging reservoir classification method and curve envelope area index method of three kinds of logging capacity based on the logging,the productivity prediction coincidence rate reached more than 72%.Based on the above method,a comprehensive set of techniques for the identification and evaluation of low permeability reservoir is formed,which can improve the accuracy of logging interpretation and interpretation.