基于元素俘获谱测井和核磁共振测井的碳酸盐岩储层硅化作用类型判别  

Identification of Silicification Types in Carbonate Reservoirs Based on Elemental Capture Spectroscopy Logging and Nuclear Magnetic Resonance Logging

作　　者：王士新 杨志国[1] 刘晓亮[1] 赵德丽 李怀彪 刘厚武 WANG Shixin;YANG Zhiguo;LIU Xiaoliang;ZHAO Deli;LI Huaibiao;LIU Houwu(CNOOC Energy Technology&Service Limited,Tianjin 300459,China;International Branch,China National Logging Corporation,Beijing 102206,China)

机构地区：[1]中海油能源发展股份有限公司,天津300459 [2]中国石油集团测井有限公司国际公司,北京102206

出　　处：《测井技术》2024年第1期94-100,共7页Well Logging Technology

基　　金：国家科技重大专项“海外重点油气田开发钻采关键技术”(2017ZX05032-004)。

摘　　要：硅化作用在巴西桑托斯盆地A油田广泛发育,对储层物性有很大影响。在前人对该区硅化作用研究的基础上,以常规测井、元素俘获谱测井和核磁共振测井综合分析为主要手段,结合储层物性数据、X衍射数据和薄片等资料,将硅化作用成因类型进行了进一步细分,分析了不同硅化作用对储层物性的影响,总结出不同硅化作用的典型测井响应特征和判别方法。研究表明,不同硅化类型对储层物性影响不同,早成岩a型对储层物性的影响较小,早成岩b型和后热液b型储层物性随硅质含量的增加而变差,后热液a型储层物性变得极差,非该区域有效储层。在元素俘获谱测井定量计算地层硅质含量的基础上,综合分析常规测井和核磁共振测井曲线特征可以判别出碳酸盐岩储层硅化作用类型,该研究对其他相似地区进行硅化作用类型判别有借鉴意义。Silicification is commonly developed in Santos basin,Brazil,which has great effect on reservoir property.On the basis of previous studies on silicification in this area,using conventional logging,element capture spectroscopy logging and nuclear magnetic resonance logging as the main means,combined with reservoir physical property data,X-ray diffraction data and thin slice data,the genetic types of silicification are further subdivided,and the effects of different silicification on reservoir physical properties are analyzed.The typical logging response characteristics and discrimination methods of different silicification processes are summarized.It shows that different silicification types have different influence on reservoir property.The physical properties of the early rock a type have little influence on the reservoir,the physical properties of the early rock b type and the post-hydrothermal b type deteriorate with the increase of silica content,and the physical properties of the post-hydrothermal a type become extremely poor,which is not an effective reservoir in this area.On the basis of quantitative calculation of formation silicon content by elemental capture spectroscopy logging,the silicification types of carbonate reservoir can be identified by comprehensive analysis of conventional logging and nuclear magnetic resonance logging curves characteristics.This study has reference significance for other similar areas to identify silicification types.

关 键 词：硅化作用 核磁共振测井 元素俘获谱测井 储层物性 桑托斯盆地 

分 类 号：P631.84[天文地球—地质矿产勘探]