摘要
在铸体薄片、压汞曲线和岩心观察等资料研究的基础上对阿南凹陷阿四段储层展开了储层特征研究。结果显示,阿四段储层砂岩主要为岩屑质长石砂岩、长石质岩屑砂岩、岩屑砂岩,以及少量长石砂岩;阿四段发育的孔隙主要为粒间溶蚀孔,是流体重要的渗流通道;喉道主要有微喉道和片状喉道,阿四段储层整体上属于中孔—低—中渗储层。在灰色系统理论基础上,采用K-means聚类分析方法,最终在储层评价过程中选取了孔隙度、渗透率、砂地比、砂体厚度和沉积微相类型这5个参数,评价结果表明阿四段储层以Ⅲ、Ⅳ类为主,而Ⅰ、Ⅱ类储层发育情况较差所占比例较小。
The study of the A'nan Sag reservoir's characteristics is based on thin section,intrusive mercury curve and core observations.The results show that the K1ba4 reservoir is mainly composed of feldspathic arenite,feldspathic litharenite,lithic sandstone and small amounts of arkose.The main seepage channel is of a inter-granular dissolved pore type,and the throat types comprise mainly of micro throats and lamellar throats.The reservoir is of a middle porosity and low-middle permeability type.Using grey system theory and Kmeans clustering methodology,porosity,permeability,sandstone ratio,sand thickness and sedimentary micro-facies were chosen as necessary parameters to evaluate the reservoirs' quality.The results show that the main reservoir types are Type Ⅲand Type Ⅳ,and the scale of Type Ⅰand Type Ⅱ reservoir is relatively small.
出处
《能源与环保》
2017年第11期30-34,41,共6页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
基金项目:阿南凹陷沉积微相研究(HBYT-2015-JS-131)
关键词
储层特征
阿四段储层
孔隙结构
储层评价
阿南凹陷
reservoir characteristics
K1ba4 reservoir
pore structure
comprehensive evaluation
A'nan Sag
