摘要
随着深层油气和非常规油气勘探的推进,凝析油作为增储上产的优质资源越来越受到关注。为了系统认识中国凝析油勘探现状,进一步明确凝析油成因机制、相态、富集规律等复杂问题,对凝析油的定义、勘探历史、分布特征、成因分类及定量分析等开展研究,指出:中国凝析油探明地质储量约为7.1×10^(8) t,凝析油气田(藏)共163个。探明储量大于1 000×10^(4)t的凝析气田(藏)主要分布在塔里木盆地和渤海湾盆地,具有大型凝析油气田在中国东部和西部并存的分布特征。在创新认识原生型凝析气藏的基础上,进一步考虑源储关系等因素,将中国已发现的原生型和次生型2类凝析气藏进一步划分为远源(源外)和近源(源内)2个亚类。根据建立的凝析气藏新成因类型,重新梳理了全国凝析气藏成因类型及成藏特征,指出无论是从凝析气藏个数还是探明储量来看,中国凝析油均以原生型成因为主。原生型凝析油的探明地质储量约占凝析油总探明地质储量的70%,次生型占比约为30%。远源(源外)聚集成藏型占比(约57%)要比近源(源内)聚集成藏的占比(43%)高。
With the development of deep and unconventional oil and gas exploration,condensate oil has attracted more and more attention as a high-quality resource.For systematic study the exploration status and the complex formation mechanisms of condensate oil and other key problems,the condensate oil has been analyzed in terms of definition,exploration history,distribution characteristics,origin classification and quantitative analysis.It is pointed out that the proved geological reserves of condensate oil in China are about 710 million tons and there are 163 condensate oil and gas fields(reservoirs).Condensate gas fields with proven reserves of more than 10 million tons mainly distributed in Tarim Basin and Bohai Bay Basin,which has the characteristics of the coexistence of large condensate gas fields in eastern and western China.On the basis of innovative understanding of primary condensate gas reservoirs,the source-reservoir relationship and other factors are further considered,and the two types of primary and secondary condensate gas reservoirs discovered in China are further divided into two sub-categories:Remote(external)and near(internal).It also improves the shortcomings of primary condensate gas reservoirs in the aspects of hydrocarbon generation parent material,evolution stage and accumulation mode.According to the established new genetic types,we then reviewed the genetic types and accumulation characteristics of condensate gas reservoirs in China.It is pointed out that no matter in terms of the number of condensate gas reservoirs or proven reserves,China's condensate oil is mainly of primary origin.The primary condensate in China accounts for about 70%of the total proved geological reserves,and the proportion of secondary condensate is about 30%.The proportion of remote(external)accumulation types(about 57%)is higher than that of near(internal)(43%).
作者
王义凤
李剑
国建英
田继先
王晓波
李谨
崔会英
Yifeng WANG;Jian LI;Jianying GUO;Jixian TIAN;Xiaobo WANG;Jin LI;Huiying CUI(PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;Key Laboratory of Gas Reservoir Formation and Development,CNPC,Langfang 065007,China)
出处
《天然气地球科学》
CAS
CSCD
北大核心
2024年第11期1950-1960,共11页
Natural Gas Geoscience
基金
中国石油天然气股份有限公司前瞻性与基础性重大科技项目“大气田(区)成藏规律与勘探关键技术研究”下设03课题“凝析油与轻质油形成机制、成藏条件及资源潜力研究”(编号:2021DJ0603)资助。
关键词
凝析油
轻质油
凝析气藏
成因类型
原生型
次生型
气侵
Condensate oil
Light oil
Condensate gas reservoir
Genesis type
Primary
Secondary
Gas invasion
