Reservoir Characteristics Of Qian 4~3 Oil Formation In Guanghua-huangchang Area

This project is mainly based on the low-permeability reservoir of the Qianchang-Guanghua-Huangchang oilfield,which has the largest reserves in the low-permeability reservoir in the Jianghan oil zone,and has the largest scale of production.With the progress in exploration and development technology,Low-permeability oil and gas resources gradually become an important type of oil and gas resources,and almost every country or region that has found oil and gas has low-permeability oil and gas resources.China's low-permeability oil and gas resources are also quite abundant.Among the proven reserves in China,low-permeability reservoirs account for more than half of them.Low-permeability oil and gas exploration,development and development are the only way for the future development of China's oil and gas energy industry.To achieve significant energy development,China must focus on the development of low-permeability oil and gas.This project applies various techniques such as well logging techniques and methods,core correlation methods,testing techniques,indoor tests and other data,and applies statistics,numerical simulation techniques,etc.,starting from the analysis of regional geological conditions in the area to the division of sedimentary microfacies.,and then re-establish the minimum porosity and permeability of the reservoir from the two aspects of physical and electrical properties,to the establishment of reservoir rock and electricity relations,the study of reservoir heterogeneity,drawing the porosity,permeability of the plate,Reproduce reserves,analyze and summarize the geological characteristics of low-permeability reservoirs deposited in salt lakes,ascertain the scale of reserves,develop the potential of low-permeability reservoirs,guide the development of remaining oils,improve them after step-by-step research,and further improve them.Through the development of results,the overall goal of efficient development is achieved,the potential of low-permeability reservoirs is fully realized,and good economic and social benefits are achieved in actual production.Through the research of the subject,some novel innovations have been made in the understanding of reservoirs,and a series of achievements and understandings have been obtained.In the course of development,relatively good results have also been obtained and good economic benefits have been achieved.Through the research of this topic,a variety of methods have been used to determine the lower limit of physical properties of effective thickness.The lower limit of physical properties of effective thickness is:??9%,K?1×10^-3?m ²,and the porosity is reduced by 2%compared with the original standard.Based on the statistics of the test data of the submarine 4³ oil group,an interpretation map of the oil-dry layer and the oil-water layer was established and improved,and the lower limit of the effective thickness of the submarine 4³ oil group was determined.The interpretation criteria for the dry layer are:natural gamma ratio?6.5,difference in acoustic time difference?-15,density difference?-0.1,normalization of logging data according to the standard layer,and use of corrected sonic time difference and density The porosity and permeability maps establish the porosity and permeability interpretation models.The reserve calculations were carried out in small layers.The oil-bearing area was 43.04 km²,and the petroleum geological reserves were 1769.3×10⁴tons.Compared with reserve conversion,the oil-bearing area was increased by 9.94km²and the petroleum geological reserve was 387.7×10⁴t.