巴西桑托斯盆地复杂碳酸盐岩油田火成岩发育特征及预测方法  

Characteristics and prediction methods of igneous rocks in complex carbonate oilfields in Santos Basin,Brazil

作　　者：刘亚明[1] 王丹丹[1] 田作基[1] 张志伟[1] 王童奎 王朝锋 阳孝法[1] 周玉冰[1] LIU Yaming;WANG Dandan;TIAN Zuoji;ZHANG Zhiwei;WANG Tongkui;WANG Chaofeng;YANG Xiaofa;ZHOU Yubing(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;China National Oil and Gas Exploration and Development Corporation,Beijing 100034,China;PetroChina Hangzhou Research Institute of Geology,Hangzhou 310023,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油国际勘探开发有限公司,北京100034 [3]中国石油杭州地质研究院,杭州310023

出　　处：《岩性油气藏》2023年第6期127-137,共11页Lithologic Reservoirs

基　　金：中国石油天然气股份有限公司科技项目“海外深水、超深水油气勘探关键技术研究”(编号:2021DJ2403);“海外大型碳酸盐岩油藏高效上产关键技术研究”(编号:2023ZZ19);中油国际海外科技项目“美洲重点地区油气成藏规律研究及潜力评价”(编号:2023-YF-01-05)联合资助。

摘　　要：根据岩心薄片、分析化验、测井和地震等资料,利用地质和地球物理相结合的研究方法,对巴西桑托斯盆地火成岩期次、岩性岩相、地球物理特征、火山机构特征及Eastern油田火成岩发育特征等进行了研究。研究结果表明:①桑托斯盆地发育瓦兰今-欧特里夫期喷发岩、巴列姆-阿普特早期喷发岩、阿普特期喷发岩、坎潘期侵入岩及始新世侵入岩和喷发岩5期岩浆活动,具有陆上喷发和水下喷发2种模式,发育裂隙式和中心式火山机构,可划分为火山通道相、火山颈相、溢流相、碎裂相、次火山岩相、火山沉积相等6种岩相。②按照火山机构“定区”、火山通道“定源”、地震反射特征“定相”、多重属性“定性”、叠前反演“定量”的火成岩预测方法,实现了Eastern油田火成岩的分布预测,侵入岩主要分布于研究区中部,喷发岩主要分布于研究区西北部和东部,经钻井证实,预测结果符合率达95%。③含火成岩的盆地中,其油气成藏与火成岩的形成演化密切相关,火成岩对油气成藏具有建设性和破坏性的双重影响,对油气勘探具有重要意义。Based on cores,analytical tests,well logging and seismic data,the stages,lithology and lithofacies,geophysical characteristics and volcanic edifices of igneous rocks in Santos Basin of Brazil were studied by means of combination of geology and geophysics,and the development characteristics of igneous rocks in Eastern oilfield was analyzed.The results show that:(1)The Santos Basin developed five stages of magmatic activities,namely Valanginian-Hauterivian eruptive rocks,Barremian-Early Aptian eruptive rocks,Aptian eruptive rocks,Campanian intrusive rocks,and Eocene intrusive rocks and eruptive rocks.There are two eruption models,incluing subaerial eruption and subaqueous eruption,two types of volcanic edifices,including fissure type and central type,and six types of rock facies,including volcanic channel facies,volcanic neck facies,overflow facies,cataclastic facies,subvolcanic facies and volcanic sedimentary facies.(2)The distribution prediction of igneous rocks in Eastern oilfield has been realized according to the prediction method of region determination by volcanic edifice,source determination by volcanic channel,facies determination by seismic reflection characteristics,qualitative determination by multiple attributes and quantitative determination by pre-stack inversion.Intrusive rocks are mainly distributed in the central part of the study area,and eruptive rocks are mainly distributed in the northwest and east part of the study area.The results were confirmed by drilling and the coincidence rate reached 95%.(3)Hydrocarbon accumulation in basins with igneous rocks is closely related to the formation and evolution of igneous rocks.Igneous rocks have both constructive and destructive effects on hydrocarbon accumulation,and they are of great significance for oil and gas exploration.

关 键 词：火成岩 陆上喷发 水下喷发 裂隙式火山机构 中心式火山机构 火成岩分布预测 复杂碳酸盐岩油田 Eastern油田 桑托斯盆地 

分 类 号：TE121.3[石油与天然气工程—油气勘探] P631.4[天文地球—地质矿产勘探]