川东五百梯石炭系气藏沉积微相特征及其储渗单元划分  

THE SEDIMENTARY MICROFACIES CHARACTERISTIC OF CARBONIFEROUS RESERVOIR,AND ITS RESERVOIR AND PENETRATION UNITS AT WUBAITI,EASTERN SICHUAN PROVINCE

作　　者：徐国盛[1] 朱建敏[1] 周存俭[1] 宋朝辉[2] 李爽[2] 李建林[3] 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室成都理工大学,四川成都610059 [2]中国石油西南油气田分公司重庆气矿地质研究所,重庆400021 [3]中国石油西南油气田分公司川东开发公司,重庆400021

出　　处：《物探化探计算技术》2009年第5期447-453,409,共7页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：中国石油西南油气田分公司2005年科研计划项目(20050305-01-03)

摘　　要：石炭系黄龙组是川东地区五百梯气田的主力气藏,随着勘探开发的深入,系统研究黄龙组沉积体系的内部构成,空间配置,建立沉积相模式,理清储集体的分布规律,划分气藏的储渗单元显得十分迫切。这里在充分利用地质、测井、薄片等资料的基础上,采用沉积体系分析方法,对黄龙组的岩相组合和沉积环境做了详细研究,识别出三种亚相,八种微相,研究了各亚相的沉积特征和沉积条件,建立了研究区石炭系黄龙组咸化泻湖湖平面升降碳酸盐岩沉积模式。此外,由于石炭系储层总体物性较差,非均质性强,其渗透性能成为制约气井产能高低的重要因素。为此对气藏进行中～高渗区、低渗区的储渗单元划分,经研究与钻井证实,石炭系储渗性在含气范围内呈"二高三低"的分布特征,这为气田中后期开发调整方案的制定提供了科学依据。The Huanglong formation of carboniferous is main gas reservoir of the Wubaiti gas field in eastern Sichuan province.Based on the thoroughly exploratory development,it seems very stringency that systematically studying the inside building of the depositional system and inter-space allocation,building the model of Sedimentary facie,figuring out the rule of accumulate reservoir's distribution,reservoir and penetration units gas reservoir.Based on the geology,logging,thin section,etc.,we make a particular study on the Huanglong formation's petrophysical association and depositional environment by using the analysis techniques of deposit system.We identify out three kinds of sub-facies,eight kinds of micro facies,deal with the sedimentary characteristics and conditions and define the depositional model of the Huanglong formation of carboniferous as a saltiness lagoon carbonate depositional model with limnetic plane going up and down.Moreover,since the carboniferous reservoir's properties are generally bad and aeolotropism is powerful,it's permeability become a important element of controlling the gas well deliverability's capacity,therefore,to divide the reservoir and penetration units into middle-tall penetration division and low penetration division of gas reservoir.The study shows that the reserve and penetration pattern display as 'two high and three low' in gas reservoir range which is confirmed by well drilling,which provide a science foundation for the formulation of development regulatory excogitation in intermediary and later stage of gas field.

关 键 词：碳酸盐岩 沉积微相 储渗单元 石炭系 五百梯 川东地区 

分 类 号：TE122.113[石油与天然气工程—油气勘探]