二连盆地赛汉塔拉凹陷白垩系火山岩储集层特征及分布预测  

Characteristics and distribution prediction of Cretaceous volcanic reservoirs in Saihantala Sag,Erlian Basin

作　　者：李浩[1,2,3] 高先志[3] 杨德相 朱超 韦庆亮 张丽 

机构地区：[1]同济大学海洋与地球科学学院,上海200092 [2]中国石化石油勘探开发研究院无锡石油地质研究所,江苏无锡214126 [3]中国石油大学(北京)地球科学学院,北京102249 [4]中国石油华北油田勘探开发研究院,河北任丘062552 [5]中国石油杭州地质研究院,杭州310023

出　　处：《石油实验地质》2014年第4期442-449,共8页Petroleum Geology & Experiment

基　　金：中国石油"十一五"基础研究课题"二连盆地新层系;新领域油气地质特征综合研究"(P2010154)资助

摘　　要：利用岩心、薄片等多种分析手段,从火山岩岩性、岩相、孔隙类型、储集层非均质性等方面研究二连盆地赛汉塔拉凹陷白垩系火山岩储集层特征,分析火山岩储集空间类型、储集层物性等特征。通过建立地质—地震对应关系,运用分频属性反演及地震属性分析法对研究区有利储集层分布进行预测。研究结果表明赛汉塔拉凹陷火山岩主要发育于下白垩统阿尔善组三段,火山岩岩性主要为安山岩,储集空间为气孔、杏仁体内孔、溶蚀孔、收缩缝和构造缝等,孔缝组合类型有孔隙型、裂缝—孔隙型、孔洞—裂缝型和裂缝型;岩相主要发育喷溢相,爆发相和喷发沉积相分布较局限,喷溢相上部亚相储集层物性和含油性最好;有利储集层紧邻扎布断裂分布,纵向上分布在下白垩统阿尔善组三段上部,其中扎布断裂西段上升盘赛60井区的阿三段上部层段火山岩储集层相对较好,勘探潜力大,火山岩油气成藏属于源外大断层输导成藏模式。With core, thin slice and other analysis methods, this paper analyzed the characteristics of Cretaceous volcanic reservoirs in the Saihantala Sag of the Erlian Basin from lithology, lithofacies, pore type, reservoir heterogeneity, etc. After establishing the relationship between geology and seismic data, this paper predicted some favorable reservoirs of the study region through seismic inversion and seismic attribute analysis methods such as frequency-divided inversion, correlation length analysis and so on. 3＂he results showed that volcanic rocks mainly developed in Member 3 of A＇ ershan Formation of the Lower Cretaceous in the Saihantala Sag, with andesite as the main litbology. Reservoir space types included pores, apricot kernel inner pores, dissolved pores, shrinkage cracks and structural fractures; pore-fissure associations included pore type, fissure-pore type, fissure and vuggy type, fissure type; eruption facies were widely distributed while explosion and volcanic sedimentary facies distributed limitedly; the upper subfacies of eruption facies had excellent reservoir and oil-bearing property; favorable reser- voirs distributed along the Zhabu Fault and the upper part of the Member 3 of the A＇ ershan Formation of the Lower Cretaceous of Sai-60 well block showed great potential; hydrocarbon accumulation model belonged to the model that faults transported hydrocarbon and reservoirs located outside source rocks.

关 键 词：火山岩 火山岩相 火山岩储集层 储集层非均质性 储集层预测 赛汉塔拉凹陷 二连盆地 

分 类 号：TE122.222[石油与天然气工程—油气勘探]