东地中海孤立碳酸盐台地沉积建造与油气成藏

温志新; 童晓光; 高华华; 王兆明; 陈瑞银; 宋成鹏; 贺正军; 刘祚冬; 康海亮

doi:10.11698/PED.2021.02.05

石油勘探与开发 >

2021 , Vol. 48 >Issue 2: 279 - 289

DOI: https://doi.org/10.11698/PED.2021.02.05

油气勘探

东地中海孤立碳酸盐台地沉积建造与油气成藏

温志新 ,
童晓光 ,
高华华 ,
王兆明 ,
陈瑞银 ,
宋成鹏 ,
贺正军 ,
刘祚冬 ,
康海亮

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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

温志新（1968-）,男,河北承德人,博士,中国石油勘探开发研究院高级工程师,主要从事全球含油气盆地分析与海外新项目评价方面的研究工作。地址：北京市海淀区学院路20号,中国石油勘探开发研究院全球油气资源与勘探规划研究所,邮政编码：100083。E-mail: wenzhixin@petrochina.com.cn

收稿日期: 2020-07-17

修回日期: 2021-03-08

网络出版日期: 2021-03-19

基金资助

国家科技重大专项（2016ZX05029001）; 中国石油天然气集团科技项目（2019D-4310）

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Build-ups and hydrocarbon accumulation of the isolated carbonate platforms in the eastern Mediterranean

WEN Zhixin ,
TONG Xiaoguang ,
GAO Huahua ,
WANG Zhaoming ,
CHEN Ruiyin ,
SONG Chengpeng ,
HE Zhengjun ,
LIU Zuodong ,
KANG Hailiang

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1. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China;
2. China National Oil and Gas Exploration and Development Corporation, Beijing 100034, China

Received date: 2020-07-17

Revised date: 2021-03-08

Online published: 2021-03-19

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摘要

基于区域地质、二维地震及大洋钻探等数据,通过构造精细解释及地震相研究,分析了东地中海埃拉托色尼海山（ESM）及其周缘孤立台地形成、生物礁体类型及油气成藏条件等,指出了未来勘探方向。研究表明,东地中海ESM等系列孤立碳酸盐台地形成演化与新特提斯洋的开合休戚相关,早期为从非洲-阿拉伯板块上裂解出来的垒式断块,形成于中三叠世—早侏罗世陆内裂谷阶段,经过中侏罗世陆间裂谷阶段、晚中侏罗世—晚白垩世土伦期漂移阶段和晚白垩世森诺期—中新世俯冲消减阶段继承性碳酸盐岩沉积建造,晚中新世梅西期以来受新特提斯洋关闭影响发生中—轻度反转改造。受不同古构造背景控制形成3类孤立台地,一是小规模狭窄垒式断块所控制的单个点礁型孤立台地,二是中等规模宽缓垒式断块所控制的单个环礁型孤立台地,三是大规模宽缓古隆起控制形成的多个礁滩复合体型孤立台地。前两类在埃南和埃西凸起上普遍发育,第3类只分布于ESM海山之上。纵向上,受海平面升降影响,ESM古隆起、埃南和埃西凸起上均发育了中侏罗统巴柔阶—上白垩统土伦阶和中新统两套礁体建造。单个点礁型孤立台地和单个环礁型孤立台地已被钻井证实具有优越的天然气成藏条件,ESM海山隆起带上多个礁滩复合体型孤立台地同样值得探索。图11参42

关键词： 东地中海; 埃拉托色尼海山（ESM）; 孤立碳酸盐台地; 生物礁; 油气成藏

本文引用格式

温志新 , 童晓光 , 高华华 , 王兆明 , 陈瑞银 , 宋成鹏 , 贺正军 , 刘祚冬 , 康海亮 . 东地中海孤立碳酸盐台地沉积建造与油气成藏[J]. 石油勘探与开发, 2021 , 48(2) : 279 -289 . DOI: 10.11698/PED.2021.02.05

Abstract

Based on the data of regional geology, 2D seismic exploration and ocean drilling, the formation of the Eratosthenes Seamount (ESM) and its surrounding isolated platforms, types of organic reefs and hydrocarbon accumulation conditions in the eastern Mediterranean are analyzed through fine tectonic interpretation and seismic facies study, and the future exploration targets are pointed out. The formation and evolution of the ESM and its peripheral isolated platforms are highly related to the open and close of the Neotethyan ocean. The precursors of the ESM and its peripheral isolated platforms are both horst-type fault blocks formed in the Middle Triassic-Early Jurassic intracontinental rift stage. The ESM and its peripheral isolated platforms underwent continued and inherited carbonate build-ups during the Middle Jurassic intercontinental rift stage, the Late Jurassic-Late Cretaceous Turonian passive drift stage, and Late Cretaceous Senonian-Miocene subduction stage, as well as medium-slight inversion transformation beginning in the Late Miocene Messinian caused by the closure of the Neotethyan ocean. Three types of isolated platforms formed controlled by variant paleo-tectonic settings: the first type is composed of a single patch-like reef controlled by a small-scale and narrow horst-type fault block, the second type consists of a single circle-like reef controlled by a middle-scale and wide horst-type fault block, and the third type is comprised of multiple reef-beach complexes controlled by a large-scale and broad paleo-high. The first two types universally developed in the highs of the Aixi and Ainan structure belts, and the third type only developed in the ESM. As a result of fluctuation of sea level, two sequences of reef build-ups, i.e. the Middle Jurassic Bajocian-Upper Cretaceous Turonian and the Miocene, developed in the ESM as well as the highs in the Aixi and Ainan structure belts. Drillings have confirmed that the first two types of isolated platforms with a single patch-like reef and a single circle-like reef have good conditions for natural gas accumulations. The isolated platforms of reef-beach complexes in the ESM also has potentials of natural gas and is worth prospecting.

Key words： eastern Mediterranean; Eratosthenes Seamount; isolated carbonate platforms; organic reef; hydrocarbon accumulation

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