三塘湖盆地马朗凹陷火山岩储层测井评价

Logging Evaluation of Volcanic Reservoirs in Malang Sag of Santanghu Basin

火山岩储层测井评价的主要难点,也是重点有三个,即火山岩岩性识别、火山岩储层储集空间有效性评价以及油气水判别。在此通过岩心观察和岩石薄片鉴定等资料为基础,结合常规测井响应特征和成像测井等信息,识别各种火山岩岩性;还利用声波时差、岩性密度等测井技术,结合岩心分析,开展裂缝、孔隙的定性识别和定量评价;同时加大测井新技术的推广和应用,如应用成像测井技术直观显示裂缝、孔洞的发育状况,应用偶极子声波测井技术反映储层的非均质性和渗透特性,应用核磁共振测井技术确定储层孔隙结构及物性变化特征;另外还利用图版法、压汞法和差谱法等手段进行油气判别,基本形成了一套火山岩储层综合解释技术、方法和思路,在科研生产中取得了一定成效。

Three major difficulties or key points for volcanic reservoir logging evaluation are volcanic rock lithology identification, validity evaluation of volcanic reservoir storage space, and oil-gas-water discrimination. Based on core observation and data such as identification of rock slice, various volcanic rock lithology can be identified combined with conventional logging response characteristics and imaging logging. Qualitative identification and quantitative evaluation of fracture and pore have been conducted by use of interval acoustic transit time, litho-density logging, combined with core analysis. At the same time, the new logging technology has been popularized such as applying imaging logging to reveal fracture and pore space growing characteristic, applying dipole acoustic logging technology to reflect reservoir heterogeneity and permeability, applying NMR technology to determine reservoir pore structure and characteristic of physical property, and applying chart, mercury intrusion method and spectral subtraction to discriminate oil and gas. A suit of integrated interpretation technology and method has been formed, which has achieved some success in scientific research and production.