基于气测烃组分差异的CO2气体评价新方法——以恩平凹陷为例  

A NEW EVALUATION METHOD OF CO GAS BASED ON THE DIFFERENCE OF HYDROCARBON COMPONENTS BY GAS LOGGING:A CASE STUDY IN THE ENPING DEPRESSION

作　　者：熊亭 关利军 印森林 蒋钱涛 曹英权 程乐利 XIONG Ting;GUAN Lijun;YIN Senlin;JIANG Qiantao;CAO Yingquan;CHEN Leli(Stemzhen Branch of CNOOC(China),Ltd.,Sshenzhen 518067,China;College of Gieoscience,Yangtze University,Wuhan 434000,China;Institute of Mud Logging Technology and Engineering,Yangtze University,Jingzhou 434023,Hubei.China;China-France Bohai Gcoscrvices Co.Ltd.,Tanggu 300452,Tianjin.China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,深圳518067 [2]长江大学地球科学学院,武汉430100 [3]长江大学录井技术与工程研究院,湖北荆州434023 [4]中法渤海地质服务有限公司,天津塘沽300450

出　　处：《海洋地质前沿》2021年第8期44-51,共8页Marine Geology Frontiers

基　　金：“十三五”国家科技重大专项“我国含油气盆地深层油气分布规律与资源评价”(2017ZX05008-006-004-002)。

摘　　要：针对地下CO2气体受物理及化学性质、储层岩性、物性等因素的影响,现有的常规录、测井评价方法在定性识别与定量评价方面存在不足。利用现场气测录井资料、结合地层测试资料和电缆泵抽取样数据,在对恩平凹陷油层、CO2气层、含CO2油层气测烃组分响应特征分析基础上,提出了基于气测烃组分差异的CO2定性识别与定量评价方法的解释图版。研究表明:(1)优选C1%、(C3+C4+C5)/C1作为气测烃组分特征参数建立了CO2气层的识别图版;(2)利用气测录井C1%与地层测试、电缆泵抽取样的CO2含量进行相关性建模,建立了定量评价关系。最后,应用该方法对近期完钻的2口探井中3个显示层进行验证,解释符合率达100%,很好地解决了勘探阶段CO2定性识别与定量评价难题,为勘探作业快速决策以及后期开发方案制定提供了强有力的技术支撑。Influenced by gas properties, reservoir lithology, reservoir physical properties and other factors, conventional logging methods are not efficient enough for both qualitative identification and quantitative evaluation of CO2 gas. Taking the Enping depression as a case, based on the characteristics of hydrocarbon components in the oil layer, CO2 gas layer and CO2 oil layer, this paper, using the field gas logging data together with formation testing data and cable pumping sample data, creatively proposed some explanation charts for qualitative identification and quantitative evaluation of CO2 based on the difference in hydrocarbon components in gas log.(1) An effective qualitative identification chart is established for CO2 gas reservoir, selecting C1% and(C3+C4+C5)/C1 as the characteristic parameters of hydrocarbon components from gas log.(2) A quantitative relationship between the CO2 content and the C1% of the reservoir is established with the data from gas log for quantitative calculation of the CO2 content in the exploration stage. The method is applied for 3 fluorescence display layers in 2 exploration wells recently completed, and the interpretation coincidence rate reaches 100%. It has solved the problem of CO2 qualitative identification and quantitative evaluation in the exploration stage, and also provided a strong technical support for the rapid decision-making of exploration and development operations.

关 键 词：CO2 气测烃组分 流体性质 定性识别 定量评价 恩平凹陷 

分 类 号：P744.4[天文地球—海洋科学] P618.13