Method for determining the content of natural gas in medium-or low-mature fine-grained rock
发布时间：2024-01-08
元数据
名 称
Method for determining the content of natural gas in medium-or low-mature fine-grained rock
科技资源标识
CSTR:11738.16.NCDC.XDA14.PT4556.2024
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摘 要
A method for determining the content of natural gas in medium- or low-mature fine grained rock is provided. The method comprises providing an as-received sample and a liquid hydrocarbon-removed sample, dividing a particular pore size range of the fme-grained rock; molecularly simulating the excess adsorption isotherms in unit pore volume; obtaining the calculated adsorption isotherm of the liquid hydrocarbon-removed sample; obtaining the measured isotherms of the as-received sample and the liquid hydrocarbon-removed sample; performing the similarity comparison between the measured isotherm and the calculated adsorption isotherm of the liquid hydrocarbon-removed sample; determining whether to repeatedly divide the particular pore size range, obtain the excess adsorption isotherms in unit pore volume and perform the comparison according to the results of the similarity comparison; obtaining the calculated excess adsorption isotherm of the as-received sample; subtracting the calculated excess adsorption isotherm of the as-received particulate sample from its measured isotherm in order to obtain its dissolved gas amount curve; and obtaining the dissolved gas amount of the fine-grained rock at an arbitrary pressure. The method can precisely determine the content of natural gas in the fine-grained rock.
程明,罗晓容,俞雨溪,雷裕红. Method for determining the content of natural gas in medium-or low-mature fine-grained rock. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://cstr.cn/CSTR:11738.16.NCDC.XDA14.PT4556.2024.
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CSTR:11738.16.NCDC.XDA14.PT4556.2024