摘要
依据岩心、薄片、试油、物性、综合解释等资料,对东营凹陷沙三中亚段浊积岩低渗透储层特征及其有效性评价进行研究; 通过准确求取开发厚度和经济极限初产油约束下的有效开发渗透率下限确定渗透率差值,以渗透率差值为母因子表征低渗透储层综合特征并优选地层压力、岩性、含油性、成岩相作为评价参数,求取不同储层深度区间、不同控制因素作用下储层优劣综合值,实现定性参数的定量评分; 结合各评价参数权重系数、综合得分和经济初产液量计算对浊积岩低渗透储层进行分类评价.结果表明：浊积岩低渗透储层主要为岩屑质长石砂岩,以中细砂岩为主,中髙孔低渗透储层发育; 储集空间类型以原生孔隙为主,次生孔隙较发育; 发育中压实、强胶结、强溶蚀、过渡型4种成岩相类型; 发育常压、弱超压、中超压及强超压4 种压力系统; 含油性可划分为富含油（饱含油）、油浸、油斑、油迹、不含油（荧光）4个等级;浊积岩低渗透储层分为3 类, I类储层经济初产液量大于15t/ d ,综合得分大于0.5 ,域类储层经济初产液量0- 1 5t/d ,综合得分0.5 - 0.2,芋类储层经济初产液量小于0t/d ,综合得分小于0.2,1 、域类储层为有效储层,建议优先开发.
The characteristics of the low per^neability turbidite reser^^oirs in the middle of the third member of the ShahejieFor^nation in Dong^^ing sag were studied and the effectiveness were evaluated using cores, thin sections, oil production testing, porosity and per^neability, and integrated interpretation data. Permeability difference was first determ ined using accuratecalculation of the minimum permeability of reservoir for effective exploration under the restraint of initial rating of oil in economiclimits and the thickness of bed for exploration. Permeability difference was then used to approximate synthetic characteristicsof low permeability reservoirs with optimizing evaluation param eters such as formation pressu re, lithology, oil-bearingproperty and diagenetic facies. Quantitative evaluations of qualitative param eters were achieved by calculating reservoir quality comprehensive value in different depth inter^^als with different control factors. The types of low per^neability turbiditereser^^oirs can be subdivided after the calculation of weight coefficients of the evaluation parameters, comprehensive scoresand initial rating of oil in economic limits. The results show that the lithology of the low permeability turbidite reservoirs ismainly medimn and fine lithic arkose, with medium to high porosity and low permeability, and primary pores are most commonwith occasional secondary pores. Four types of diagenetic facies are common, including medium compaction diageneticfacies, strong cementation diagenetic facies, strong dissolution diagenetic facies, and transitional diagenetic facies. Normalpressure system, weak overpressure system, medium overpressure system and strong overpressure system are four main typesof pressure systems in the research area. Four types of oil-bearing property of the reservoirs including oil rich, oil immersed,oil spot and stains, and no oil （ fluorescence）. The low permeability turbidite reservoirs can be subdivided into three types：type I with initial rating of oil in economic limit greater than 15 t/ d and the composite score greater than 0. 5 ; type Ⅱ withinitial rating of oil in economic limit range from 0 to 15 t/d and the composite scores range from 0. 5 to 0. 2 ; and type Ⅲ withinitial rating of oil in economic limit less than 0 t/d and the composite scores is less than 0. 2. Type I and type Ⅱ are effectivereseroirs, which should be considered as preferential development objects.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第4期1-11,共11页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家科技重大专项(2011ZX05006-003)
中国石油大学(华东)研究生自主创新科研计划项目(14CX06070A)
关键词
渗透率差值
权重系数
储层评价
低渗储层
浊积岩
东营凹陷
permeability difference
weight coefficients
effectiveness evaluation
low permeability reservoir
turbidite
Dongying Sag
作者简介
杨田（1989-）,男,博士研究生,研究方向为沉积学和油气储层地质学.E-mail：yaiigtiaii9645@126.com.
通讯作者：操应长（1969-）,男,教授,博士,博士生导师,研究方向为沉积学、层序地层学及油气储层地质学.E-mail：cyc8391680@163.com
