巴西桑托斯盆地深水大油田勘探实践与理论技术进展  

Theoretical and technical progress in exploration practice of the deep-water large oil fields,Santos Basin,Brazil

作　　者：何文渊 史卜庆 范国章 汪望泉 王红平 王景春 左国平 王朝锋 杨柳 HE Wenyuan;SHI Buqing;FAN Guozhang;WANG Wangquan;WANG Hongping;WANG Jingchun;ZUO Guoping;WANG Chaofeng;YANG Liu(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]中国石油国际勘探开发有限公司,北京100034 [2]中国石油杭州地质研究院,杭州310023

出　　处：《石油勘探与开发》2023年第2期227-237,共11页Petroleum Exploration and Development

基　　金：中国石油基础性前瞻性科技攻关项目“海洋油气勘探关键技术研究”(2021DJ24)。

摘　　要：分析研究巴西桑托斯盆地油气勘探历程及勘探实践成果,利用地震、重磁、钻井等资料,系统研究总结了巴西桑托斯盆地油气富集规律理论认识和勘探关键技术进展。提出盆地“两隆三坳”构造格局及阿—乌隆起带控藏的认识,认为裂谷期主烃源灶控制油气富集区带、古构造控制湖相碳酸盐岩储集层规模和质量、连续厚层盐岩控制油气聚集与保存,揭示了CO_(2)充注改造油气藏过程和机理。研发了层控、相控盐下构造变速成图、湖相碳酸盐岩储集层预测、侵入岩和喷发岩分布预测、湖相碳酸盐岩烃类检测以及超临界状态CO_(2)流体测井识别等5项勘探关键技术。上述理论认识与技术方法为中国石油巴西深水项目超大型油田的发现和探明提供重要支撑,对桑托斯盆地及相似领域的深水大型油田勘探具有启示意义。The history and results of petroleum exploration in the Santos Basin,Brazil are reviewed.The regularity of hydrocarbon enrichment and the key exploration technologies are summarized and analyzed using the seismic,gravity,magnetic and drilling data.It is proposed that the Santos Basin had a structural pattern of two uplifts and three depressions and the Aram-Uirapuru uplift belt controlled the hydrocarbon accumulation.It is believed that the main hydrocarbon source kitchen in the rift period controlled the hydrocarbon-enriched zones,paleo-structures controlled the scale and quality of lacustrine carbonate reservoirs,and continuous thick salt rocks controlled the hydrocarbon formation and preservation.The process and mechanism of reservoirs being transformed by CO_(2)charging were revealed.Five key exploration technologies were developed,including the variable-velocity mapping for layer-controlled facies-controlled pre-salt structures,the prediction of lacustrine carbonate reservoirs,the prediction of intrusive/effusive rock distribution,the detection of hydrocarbons in lacustrine carbonates,and the logging identification of supercritical CO_(2)fluid.These theoretical recognitions and exploration technologies have contributed to the discovery of deep-water super-large reservoirs under CNODC projects in Brazil,and will guide the further exploration of deep-water large reservoirs in the Santos Basin and other similar regions.

关 键 词：湖相碳酸盐岩 盐岩 深水油田 火成岩 储集层预测 烃类检测 超临界CO_(2) 桑托斯盆地 巴西 

分 类 号：TE122[石油与天然气工程—油气勘探]