Remaining Reserves Calculation And Evaluation Of Shaan37Borefield

After years of exploration, Qingbian gas field of Changqing has made strategic significance in exploration. Since obtaining industrial gas flow in Lower Paleozoic gas reservoir of Ordovician System, Well Shaan Shen-1, the first regional exploration well, in which most of geological natural gas in the original area has been explored and the area for well sites has been less and less with two decades of exploration.Because of the complexity and low permeability of the gas reservoir of Shaan-37in Lower Paleozoic, serious heterogeneity, large differences in exploration of single well in all layers, productivity construction has been affected to some extent. Therefore, the degree of producing reserves and the distribution of remaining reserves have been analyzed. Based on the previous research on the area of geologic and formation characteristics, the thesis further analyzed the geologic reservoir characteristics of Shaan-37in Lower Paleozoic. And on this basis, the minimum parameters of each sub-layer in the research area was determined and syntactic gas reserves in the area was calculated by comprehensively using the well logging analyzing data as well as the laboratory PVT data. And applying five methods such as material balance method, production decline method, and hydraulic decline method are applied respectively to calculate and evaluate the dynamic reserves in the area, to analyze the producing degree of all sub-layers on vertical reserves, to further make the movable level of gas reserves certain, and to analyze the distribution of remaining reserves. These are of great significance to guide further exploration.