Comprehensive Study Of Xihu Depression Low Permeability Reservoir Well Test Interpretation Method

Half of the world's oil and gas reserves exist in low-permeability oil and gas reservoirs,especially in China,China's low-permeability gas resource quantity is 12 ×1012m~3.By the end of 2011 low-permeability gas proven recoverable reserves accounted for the national natural gas proven about 40% of reserves.From the beginning of 2011,low-permeability natural gas production has become an important area of China's natural gas exploration and development.The West Lake depression is located in the southeast of Shanghai City.The area is about 5.9×104km~2,the maximum thickness is more than 10 km.The development of low porosity and osmotic reservoirs in the West Lake depression of the East China Sea basin in the West Lake has great potential for oil and gas resources and has a very good prospect.The West Lake depression belongs to low permeability reservoirs,the flowability of the low permeability gas reservoir is low during the test,the time required to enter the radial flow stage is longer,but the time of all of West Lake depression test wells in the test process is short,some wells within the reservoir into the radial flow stage termination test.This paper is based on the research on the well test method of the same type of gas field on the analysis of the existing target well of successful practices,the problem of the data,the pressure response characteristics of high oil and gas well testing data;based on test data?the seepage mechanics and test theory,the evaluation of single well test data is carried out,in-depth analysis evaluation of the target zone of oil and gas well test and dynamic parameter characteristics.Based on the evaluation of oil and gas well test data,and further study the well test interpretation of the low permeability gas reservoir in the West Lake Depression.Mainly achieved the following results:1 ? A detailed explanation of the pressure test data of 20 wells in the low permeability gas reservoir of West Lake Depression was completed.Based on the results of detailed analysis and analysis of the test data,the test curve types and interpretation models of the low permeability gas reservoirs in West Lake Depression are reasonably classified,and the results are summarized and summarized.2?Based on the analysis of seepage in low permeability reservoirs,a well test interpretation model of low permeability reservoir is established.According to the characteristics of the test data of the low permeability reservoir in the West Lake Depression,the data of the test well are explained and evaluated which can support is provided for the next step of the West Lake Depression.3?Write the software to complete the project of “Comprehensive study of Xihu Depression low permeability reservoir well test interpretation method”.The software uses delphi language,with a clear visual interface,you can handle a lot of data.In addition to routine analysis,but also specially prepared low-permeability reservoir early test data processing method module,and for the test process design,induced pressure calculation prepared a special module.