摘要
厄瓜多尔Oriente盆地是南美最大的产油盆地之一,但高含水已经成为了研究区Mariann油田的显著特征。为了提高油气产量,综合利用测井、岩心和地震资料,对研究区进行经典层序地层学的研究,根据沉积旋回转换面、地层叠加样式的转换等,将厄瓜多尔Oriente盆地东北部Mariann油田白垩系Napo组划分为5个三级层序,细分为13个四级层序。在每个三级层序内部,海平面变化一般都经历了海退—海进—海退的过程,沉积物一般以加积—退积—进积沉积序列为特征,其中,低位体系域(LST)一般发育潮控河口湾沉积,海侵体系域(TST)和高位体系域(HST)发育潮控河口湾沉积。最后,结合全球海平面的变化特征,总结出了二级、三级以及四级层序的发育模式。
The Oriente Basin of Ecuador is one of the largest oil-producing basins in South America,but high-water content has become a prominent feature of the Mariann oil field in the study area.In order to improve oil and gas production,the study of classical sequence stratigraphy was carried out in the research area by means of logging,core and seismic data.The Napo group of the Mariann oil field in the northeast of the Oriente Basin of Ecuador was divided into five third order sequences and subdivided into thirteen fourth order sequences according to the depositional base-level cycle and the conversion of the formation stacking pattern.Within each third order sequence,sea level changes generally go through the process of sea-in-sea-sea retreat,and sediments are generally characterized by accumulation-retreat-accumulation sedimentation sequences,among which,low-level system domain(LST)generally develops tidal control estuary bay sedimentation,sea invasion system domain(TST)and high system domain(HST)developmental tidal control estuary bay sedimentation.Finally,combined with the characteristics of global sea level changes,the development patterns of the second,third and fourth order sequences were summarized.
作者
张萌
吴少波
Zhang Meng;Wu Shaobo(School of Earth Sciences and Engineering,Xi′an Shiyou University,Xi′an 710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi′an Shiyou University,Xi′an 710065,China)
出处
《能源与环保》
2022年第4期109-113,120,共6页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
中国石油天然气股份有限公司勘探开发研究院委托西安石油大学承担项目(RIPED-2019-JS-353)。
