琼东南盆地陵南斜坡带火山岩储层岩性与蚀变特征  

Lithologic and Alteration Characteristics of Volcanic Rocks in the Lingnan Slope Belt of Qiongdongnan Basin

作　　者：刘冲 彭俊峰 闫琢玉 张东峰 郑磊 卢梅 LIU Chong;PENG Jun-feng;YAN Zhuo-yu;ZHANG Dong-feng;ZHENG Lei;LU Mei(CNOOC Central Laboratory of CNOOC Ener-Tech-Drilling&Production Co.,Ltd.Zhanjiang 524057,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司中海油实验中心,广东湛江524057

出　　处：《东华理工大学学报（自然科学版）》2022年第6期548-553,568,共7页Journal of East China University of Technology(Natural Science)

基　　金：广东省科技厅科技计划项目(2018B030323028)。

摘　　要：陵南斜坡带崖城组出现巨厚的火山岩岩层,北部紧邻陵水凹陷,这对开拓海洋油气勘探具有重要的研究意义。通过岩石铸体薄片、扫描电镜、X射线能谱分析等方法,并结合测井资料、物性资料对该区崖城组火山岩储层岩性特征、蚀变特征以及物性特征进行系统分析,明确了该区域岩石类型主要为中、基性火山岩,绿泥石化蚀变严重,强蚀变的火山岩层段具低电阻率、低密度、高中子、高声波时差的测井特征。溶蚀作用发育不均匀,裂缝处溶蚀作用增强,绿泥石微孔为储层主要的孔隙类型,大量的绿泥石微孔使火山岩储层具有较高的孔隙度,但渗透率较差,这是储层孔高渗低的主要原因。There are huge thick volcanic rocks in Yacheng formation of Lingnan slope belt, it is close to the Lingshui depression in the north, which is of great research significance to the development of offshore oil and gas exploration. Analysis of casting thin section of rock, scanning electron microscope observation and technique of SEM-EDX were carried out. Combined with logging and physical property, a detailed study was carried out on lithologic characteristics and physical characteristics of volcanic reservoir. Rock types of the region are mainly intermediate and mafic volcanic rock. Chloritization of volcanic rock is high, altered volcanic rocks have log response of low resistivity, low-density, high neutron, high acoustic travel time. The development of dissolution is not uniform, which is enhanced at the crack. Types of the reservoir is mainly chlorite microbore, which are the main oil storage pores with low premeability, chloritization is main factor of high porosity and low permeability.

关 键 词：陵南斜坡带 火山岩储层 岩性特征 蚀变特征 储集空间特征 

分 类 号：P618.13[天文地球—矿床学]