准噶尔盆地滴西地区石炭系火山岩储层成岩作用

Diagenesis of Carboniferous volcanic reservoir in Dixi Area of Junggar Basin

查明 曲江秀

中国石油大学（华东）地球科学与技术学院，山东 青岛 266580

College of Geosciences, China University of Petroleum, Qingdao 266580, China

通过岩心观察和铸体薄片鉴定，研究准噶尔盆地滴西地区石炭系火山岩储层成岩作用特征及其对储层储集性能的影响。结果表明，该区火山岩储层成岩作用划分为原生成岩作用与次生成岩作用2大类，8种成岩作用类型。结合盆地埋藏史、热史、烃类充注过程，将火山岩成岩作用阶段划分为原生成岩作用阶段和次生成岩作用阶段，细分成5个期次。不同阶段的成岩作用对火山岩储集性能具有不同的影响：原生成岩作用控制气孔、冷凝收缩缝等原生储集空间的发育；次生成岩作用主要影响次生溶蚀孔隙、构造裂缝、风化裂缝等次生孔缝的发育。其中，构造作用是形成火山岩有效储层的重要控制因素，次生溶蚀作用及风化淋滤作用是储层发育的有利条件。

Based on the core observation and casting thin section identification, the diagenesis characteristics of Carboniferous volcanic reservoir in Dixi Area were studied. The results show that the diagenesis of volcanic reservoir in this area is divided into primary diagenesis and secondary diagenesis and are subdivided into eight diagenesis types. According to the burial history, thermal history and hydrocarbon filling process, the diagenetic phases of volcanic reservoir are divided into primary diagenetic phase and secondary diagenetic phase and are subdivided into five diagenetic stages. The diagenesis in different stages has various effects on the physical properties of volcanic reservoir. The primary diagenesis controls the development of vesicular pores and cooling contracted fractures and the secondary diagenesis influences the development of secondary pores such as secondary erosion pores, tectonic fractures and weathering fractures. In which, the tectonism is the most prominent controlling factor of effective volcanic reservoir, and the secondary erosion and the weathering leaching effects are the favorable conditions of reservoir development

10.6056/dkyqt201501007