徐深气田深层火山岩岩性测井识别及应用

徐深气田是我国目前为止发现的少数探明储量上千亿的特大气田之一,为大庆天然气事业的发展翻开了新的一页。徐深气田储层主要以火山岩为主,而火山岩储层岩性复杂多变,其岩性的影响远远超过流体的影响,因此岩性识别对该地区显得尤为重要。准确确定火山岩岩性是火山岩储层精细评价的基础。本文通过对徐深气田营城组火山岩岩心薄片资料分析,研究出了利用常规测井信息识别矿物成分,应用成像测井信息识别火山岩的岩石结构及构造,并将两者相结合对火山岩岩性进行综合判别的岩性识别方法,应用聚类分析等数学方法实现了对火山岩储层岩性的自动识别,处理结果与岩心、薄片资料对比表明,该方法对兴城、升平地区火山岩岩性识别具有较好的应用效果。

Logging Identification of Volcanic Lithology and Its Application in Xushen Gas Field

Xushen gas field is one of the giant gas fields discovered in China which proved reserve is over thousand hundred million cubic metres.It is remarkable in natural gas development of Daqing oilfield.There is mostly volcanic rocks in the reservoirs of Xushen gas field where the volcanic reservoir litholagy is complex and variable.Because the effect of lithology is far in excess of fluid,lithologic identification is espe- cially important in the area.Accurate determination of the volcanic lithology is the foundation of delicate evaluation to the volcanic reser- voirs.Through data analysis of the volcanic core wafers in Xushen gas field,this paper introduces a lithologic identification method that mineral components can be identified with conventional logging information,rock texture and structure of the volcanic can be identified with imaging well logging information,integrated identification of the lithology can be carried out through combination of them.The mathe- matical techniques like cluster analysis,etc.realized automatic identification of the lithology of volcanic reservoirs.Comparison between the processed results and core flake data shows that this method has got good application effect in volcanic lithologic identification in Xingcheng and Shenping areas.