现代地质2024，Vol.38Issue(2)：385-397,13.DOI:10.19657/j.geoscience.1000-8527.2023.038
南海神狐海域天然气水合物储层参数定量评价方法
A Quantitative Evaluation Method for the Natural Gas Hydrate Reservoir Parameters in the Shenhu Area,South China Sea
摘要
Abstract
Marine gas hydrate exists in the unconsolidated argillaceous silt and silty mud formations in a solid state.It is completely different from the occurrence of conventional oil and gas reservoirs,which are consolida-ted sandstone formations.Therefore,the logging evaluation of hydrate reservoirs is more challenging than the conventional ones.Since 2007,four hydrate drillings have been carried out in the Shenhu area of South China Sea.Abundant geophysical and core data have been obtained and it has been confirmed that there is a huge po-tential for natural gas hydrate resources in this area.In this study,starting from the research and analysis of conventional logging,special logging data,and core data in Shenhu,we summarized the logging response char-acteristics of hydrate formation.The core data were used to calibrate logging.At the end,the calculation model of reservoir lithology,physical properties,and hydrate saturation is established.Consequently,a set of quanti-tative evaluation system for natural gas hydrate reservoir parameters in the Shenhu area is proposed.The pro-posed method in this study was used to evaluate the wells comprehensively.The average porosity of hydrate for-mation is 49.91％,and the average hydrate saturation is 29.75％.The pore structure is mainly small pores and the permeability is poor.The evaluation results are consistent with the core experimental results with a coinci-dence rate of 85％.The research results provide a new reference for the evaluation of hydrate resources and ac-cumulation in the Shenhu area.关键词
天然气水合物/测井响应特征/储层参数计算/定量评价Key words
gas hydrate/logging response characteristics/reservoir parameter calculation/quantitative evalua-tion method分类
天文与地球科学引用本文复制引用
康冬菊,刘俊东,李海燕,屈翠侠,陆敬安,谢莹峰,钟超,任金峰..南海神狐海域天然气水合物储层参数定量评价方法[J].现代地质,2024,38(2):385-397,13.基金项目
广东省重点领域研发计划资助项目(2020B1111030003). （2020B1111030003）
