Research On Fine Description And Geological Modeling Of Volcanic Gas Reservoir In Wangshen1Block Of Xushen Gas Field

The rock, which is overflowed in volcanic activity or condensed and consolidated afterbeing erupted, is called volcanic rock. The volcanic rock reservoir is an unconventionalreservoir and is spread all over the world. According to the degree of acidity, the volcanic gasreservoirs can be classified into ultra-basic rock, basic, intermediate and acid rocks.Wangshen1Block of Xushen Gas Field is one of the most important gathering places ofvolcanic gas reservoir. Along with more and more energy needs of natural gas, geologists ofoil and gas find that the volcanic gas reservoir plays an decisive role in ensuring supply ofnatural gas. But they lack enough and deep understanding of geological character and law ofdistribution of this block. The research on geological character and law of distribution aredeeply carried out in this paper and the results indicate that the major pay zone is theYingcheng III formation. The Yingcheng formation develops intermediate-basic and acidicformations which are overlapped from up and down. The intermediate-basic volcanic rock aremore developed than acidic rock and the acidic rock are only distributed in south area in theblock while the intermediate-basic rock are distributed in the whole area. The reservoirs inthis block are generally in middle to low and low to ultra-low in physical properties. Based onthe fact of the block and the latest evaluation result of the reservoirs. Finally, the geologicalmodel of the block is built and the reserve is fitted with PETREL geological modelingsoftware. The result indicates that the fitting reserve is consistent with the volumetric resultand the fact of the underground.