Study On Logging Evaluation Of Shale Gas Reservoir

The paper takes logging as the main technical means,taking wei yuan and chang ning shale gas demonstration area in southern sichuan basin as the research area.The paper mainly deals with the logging research and evaluation of shale gas reservoir,and comprehensive interpretation and application of logging data.First of all,this paper briefly introduces the geological background of shu south area,and makes a small division of the long ma xi formation in the study area,so as to better explain the reservoir section.Secondly,a large amount of literature research is conducted to summarize the research contents and key analysis problems of shale gas reservoir.At the same time,the logging response characteristics of shale gas reservoirs in the research area are analyzed based on the logging response mechanism of gas-bearing shale,and the similarities and differences of shale gas reservoirs are compared with other regions.The conclusion is that the research area is obviously shale gas bearing layer.Then,the hydrocarbon potential of shale gas reservoir in the research area is analyzed.The KTI quartile method divides the organic matter into saprotype.The ? lg method to calculate total organic carbon content is high TOC value.The Ro evaluation maturity is high-over mature stage,and the dry gas phase is generated.The overall hydrocarbon potential is strong.Finally,the comprehensive evaluation of shale gas reservoir logging in the research area.The ECS is used for analysis of mineral component content and the natural gamma ray spectrum is used for analysis of composition content of clay minerals.The variable skeleton parameters are applied to the porosity and aeration porosity is applied to calculate permeability.The corrected Langmuir method is applied to calculate the adsorption gas content and the free gas content is calculated based on the effective porosity and gas saturation.All the research methods are applied to the regional shale gas reservoir for comprehensive interpretation and analysis.The research area is a favorable shale gas reservoir area for exploration and development.