摘要
大洼油田火山岩主要分布于新生界房身泡组和中生界,呈层状分布,岩性主要为玄武岩、安山岩、火山角砾岩和凝灰岩,其中火山角砾岩是中生界的主要储集层。通过对火山岩岩石学特征分析,将火山岩岩相划分为火山角砾岩柑、火山熔岩相、火山灰相和火山沉积相。阐述了火山岩成岩后生变化的类型及其对火山岩储集层物性的影响。在火山岩岩相分析、成岩后生变化分析及其物性分析基础上,对火山岩储集层进行了评价,将储集层划分为Ⅰ、Ⅱ、Ⅲ三类,预测了各类火山岩储集层的平面展布特征,为火山岩储集层研究提供了研究成果。
Volcanics in Dawa oilfield, mainly distributed in Cenozoic Fangshengpao formation and Mesozoic, are of layered distribution, composed of such lithologies as basalt, andesite, volcanic breccia and tuffs, of which volcanic breccia is a key reservoir of Mesozoic. The analysis of volcanic petrology indicates that the volcanic lithofacies can be divided into volcanic breccia, lava, ash and sedimentary ones. The epidiagenesis types of voleanics and their effects on petrophysical properties of the volcanic reservoir are revealed. On the basis of analyses of volcanic lithofacies, epidiagenelic variation and petrophysical property, the evaluation of volcanic reservoir is made, dividing it into Ⅰ,Ⅱ and Ⅲ types, predicting the plane distribution of it, and providing basic information and data for studying the volcanic reservoir in Dawa oilfield in this paper.
出处
《新疆石油地质》
CAS
CSCD
2004年第4期382-384,共3页
Xinjiang Petroleum Geology
关键词
火山岩
储集层特征
中生界
油田
Dawa oilfield
volcanic rock
reservoir
lithofacies
Mesozoic
