碳同位素录井数据所指示的油气勘探意义——以文昌B凹陷A1井为例  

The significance of oil and gas exploration indicated by carbon isotope logging data-Taking A1 well in Wenchang B depression as an example

作　　者：陈沛 Chen Pei(CNOOC(China)Limited Zhanjiang Branch,Zhanjiang 524000)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524000

出　　处：《石化技术》2024年第6期229-231,共3页Petrochemical Industry Technology

摘　　要：在介绍碳同位素录井技术的基础上,以A1井为例,开展碳同位素录井数据的分析,以揭示其在油气勘探过程中的作用,分析认为:碳同位素数据能划分钻遇气的来源,本井1500m以上钻遇天然气主要为生物成因气,1500m以下钻遇天然气为热成因气;碳同位素数据能揭示天然气的成因特征,恩平组及以下地层具有明显的深部油气运移特征,天然气为WC19-1构造同源的原油伴生气;碳同位素数据同时能分析CO_(2)来源,本区域CO_(2)主要为无机来源,且与深大断层的存在有一定相关性。Based on the introduction of carbon isotope logging technology,taking A1 well as an example,the analysis of carbon isotope logging data is carried out to reveal its role in oil and gas exploration.The analysis suggests that carbon isotope data can divide the sources of gas encountered during drilling.Natural gas encountered during drilling above 1500m in this well is mainly biogenic gas,while natural gas encountered during drilling below 1500m is thermogenic gas;Carbon isotope data can reveal the genetic characteristics of natural gas.The Enping Formation and below have obvious deep oil and gas migration characteristics,and natural gas is a crude oil associated gas of the same origin as the WC19-1 structure;Carbon isotope data can also analyze the sources of CO_(2).CO_(2) in this region is mainly inorganic and has a certain correlation with the existence of deep and large faults.

关 键 词：碳同位素 天然气 恩平组 CO_(2) 

分 类 号：TE142[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]