基于轻烃分析的复杂储层流体随钻评价新技术  

A New Technique for the Evaluation of Complex Reservoir Fluids While Drilling on Light Hydrocarbon Analysis

作　　者：李鸿儒[1] 谭忠健 符强 郭明宇 田青青 韩明刚[1] 李艳霞 Li Hongru;Tan Zhongjian;Fu Qiang;Guo Mingyu;Tian Qingqing;Han Minggang;Li Yanxia(CNOOC Energy Development Co.,Ltd.,Tianjin 300459,China;CNOOC(China)Tianjin Company,Tianjin 300459,China;Panjin Zhonglu Oil&Gas Technology Service Co.,Ltd,Panjin,Liaoning 124010,China)

机构地区：[1]中海油能源发展股份有限公司,天津300459 [2]中海石油(中国)有限公司天津分公司,天津300459 [3]盘锦中录油气技术服务有限公司,辽宁盘锦124010

出　　处：《特种油气藏》2023年第3期56-62,共7页Special Oil & Gas Reservoirs

基　　金：中海石油(中国)有限公司重大科技专项“渤海油田上产4000万吨新领域勘探关键技术”(CNOOC-KJ 135 ZDXM36 TJ 08 TJ);中海石油(中国)有限公司综合科研项目“储层有效性录测一体化定量评价技术研究”(YXKY-2019-TJ-03)。

摘　　要：针对渤中西南环古近系储层流体性质随钻评价难度大、多解性强、录井与测井资料响应特征矛盾等问题,在深度研究轻烃录井数据的基础上,建立了基于轻烃敏感参数的含水性分析、井场轻烃碳环优势分析、基于烷烃系列对比的生物降解分析以及基于主成分分析和支持向量机的数学算法等的井场轻烃流体评价方法,并进行了实例应用。评价结果表明:基于轻烃敏感参数的储层含水性图版及烷烃系列对比的生物降解程度解释图版,识别研究区流体性质效果好;井场轻烃碳环优势分析法可用于对比分析油气藏成因及来源,与常规录井方法相比,对多期次充注复杂油气藏流体评价优势明显;基于主成分分析和支持向量机的数学算法的轻烃分析方法评价复杂储层流体性质符合率较高,可达85%左右。该技术方法在研究区应用效果良好,为复杂储层流体随钻评价提供了新的思路,具有较好的应用前景。To address the problems of difficult fluid evaluation while drilling for Palaeocene reservoirs in the Southwest Zone of Bozhong Sag,strong multi-solution,and contradictory response characteristics of mud logging and well logging data,a water content analysis based on light hydrocarbon sensitive parameters,well field light hydrocarbon carbon ring dominance analysis,biodegradation analysis based on alkane series comparison,and a method for evaluating well field light hydrocarbon fluids based on mathematical algorithms such as principal component analysis and support vector machine were established,and the example applications were performed.The evaluation results show that the reservoir water content plate based on light hydrocarbon sensitive parameters and the biodegradation degree interpretation plate based on alkane series comparison are effective in identifying fluid properties in the study area;the well field light hydrocarbon carbon ring dominance analysis method can be used for comparative analysis of reservoir genesis and origin,and has obvious advantages over conventional mud logging methods in evaluating fluids in complex reservoirs with multi-stage charging;the light hydrocarbon analysis method based on mathematical algorithms such as principal component analysis and support vector machine has a high compliance rate of about 85%in evaluating the fluid properties of complex reservoirs.This technical method has been applied in the study area with good results,which provides a new idea for the evaluation of complex reservoir fluids while drilling and has a good application prospect.

关 键 词：流体随钻评价 轻烃分析 复杂储层 渤中西南环 古近系 

分 类 号：TE353[石油与天然气工程—油气田开发工程]