摘要
利用岩心观察、普通薄片、铸体薄片、扫描电镜分析和压汞曲线等多种手段,研究了蓬莱地区须二段储层成岩相和孔隙结构特征。依据成岩作用和成岩矿物划分出强压实胶结相、强压实不稳定组分溶蚀相2种成岩相。通过不同成岩相与孔隙结构特征对应关系探讨,结合试气结论,认为强压实不稳定组分溶蚀相对应孔隙结构最好,强压实胶结相中的硅质胶结次之,伊蒙混层再次之,钙质胶结最差。最后选取声波时差、电阻率、自然伽马、密度、中子5条对成岩相较敏感的测井曲线,建立了2种成岩相的测井识别标准,并以PX1井为例实现了成岩相的剖面划分,由此可利用成岩相的纵向展布连续评价储层孔隙结构在二维剖面上的特征和变化规律。此研究为该区下一步油气勘探工作提供了地质依据。
The reservoir diagenetic facies and pore structure characteristics of Xu Member II of Penglai area are studied by means of normal thin sections,cast thin sections,scanning electron microscope analysis data and mercury injection test curves.Four types of pore structure are classified by using mercury injection parameters and two types of diagenetic facies,namely,high compaction cemented facies,high compaction unsteady corrosion facies,are classified based on diagenesis and diagenetic minerals.5 logging curves sensitive to diagenetic facies,namely,interval travel time,resistivity,natural gamma,density and neutron,are selected to establish 2 kinds of logging identification criteria,realizing the vertical and lateral classification of diagenetic facies.Finally,the distribution of favorable porosity and permeability of Xu Member II of Penglai area is effectively predicted by using the distribution regularity of favorable idagenetic facies region,based on the relationship between different diagenetic facies and pore structure characteristics and in corporation with gas well test results,thus providing geologic bases for further exploration of oil & gas in this area.
出处
《特种油气藏》
CAS
CSCD
北大核心
2013年第1期34-38,152,共5页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"大型油气田及煤层气开发"之"低渗透碎屑岩储层品质与岩石物理相测井评价方法"(2011ZX05020-008)
关键词
成岩相
孔隙结构
测井识别
优质储层
须二段
川中蓬莱地区
diagenetic facies
pore structure
logging identification
high quality reservoirs
Xu Member II
Penglai area
