摘要
中东X油田上白垩统Khasib组碳酸盐岩储层属于浅海陆棚沉积,具有生物类型和岩石类型多、高孔低渗及孔隙结构复杂等特征,根据福克石灰岩分类方案,突出生物特征,在岩石分类基础上,综合对比不同类型储层孔隙结构特征及控制因素。研究表明,储层岩石类型有泥晶生屑砂屑灰岩、泥晶藻屑灰岩、泥晶生屑灰岩和泥晶浮游有孔虫灰岩等4类;孔隙结构类型可划分为高孔中渗中喉型、高孔低渗中细喉型及高孔低渗细喉型等3类;影响孔隙结构的主要因素为物性和结构组分两种,不同岩性之间,生物种类和含量的差异影响原生孔隙的发育和后期成岩作用的强弱,造成了孔隙结构的差异。同种岩性之间,灰泥含量控制了孔隙结构的质量。
The Upper Cretaceous Khasib Formation carbonate reservoir of X Oilfield in the Middle East is a shallow-sea shelf deposit,it has the characteristics of multiple biological types and rock types,high porosity and low permeability reservoirs,and complex pore structure.Based on the Folk limestone classification scheme,this paper highlights the biological characteristics,and comprehensively compares the pore structure characteristics and control factors of different types of reservoirs on the basis of rock classification.Studies have shown that the reservoir rock types include four types of micrite bioclastic sand-clastic limestone,micrite algal clastic limestone,micrite bioclastic limestone and micritic planktonic foraminifera limestone;the type of pore structure can be divided into three types:high porosity and medium permeability medium throat type,high porosity and low permeability medium fine throat type,high porosity and low permeability fine throat type;the main factors affecting the pore structure are physical properties and structural components.Among different lithologies,the difference in biological species and content affects the development of primary pores and the strength of later diagenesis,resulting in differences in pore structure.Among the same lithology,the content of plasters controls the quality of the pore structure.
作者
唐洪明
庞榆
王锡伟
赵昱超
TANG Hongming;PANG Yu;WANG Xiwei;ZHAO Yuchao(School of Geosciences and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Exploration and Development Research Institute,Southwest Oil&Gas Field Company,PetroChina,Chengdu,Sichuan 610041,China;Exploration Divisions,Southwest Oil&Gas Field Company,PetroChina,Chengdu,Sichuan 610041,China)
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2023年第3期1-13,共13页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
中国石油-西南石油大学创新联合体项目(2020CX020100)。
关键词
碳酸盐岩储层
高孔低渗
孔隙结构
控制因素
生物碎屑灰岩
carbonate reservoir
high porosity and low permeability
pore structure
controlling factor
bioclastic limestone
