基于交会图和全概率公式的流体识别方法  

Method of Fluid Identification Based on Crossplot and Total Probability Formula

作　　者：袁宇 高楚桥[1] 邹雯[2] 李祖遥 陈嵘 关叶钦 

机构地区：[1]油气资源与勘探技术教育部重点实验室(长江大学)长江大学地球物理与石油资源学院,湖北武汉430100 [2]中海油能源发展股份有限公司钻采工程研究院湛江实验中心,广东湛江524057 [3]中海石油(中国)有限公司湛江分公司,广东湛江524057 [4]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《石油天然气学报》2013年第5期79-82,3,共4页Journal of Oil and Gas Technology

基　　金："中海油能源发展股份有限公司项目(HFXMLZ-BF1101)"产出论文

摘　　要：利用交会图版进行流体识别往往是将一个或为数不多的交会图版识别结果定为最终结论,然而可能存在另外的图版结论与之不相符。为此,利用交会图技术,首次将全概率公式应用于流体性质定性识别。以优选的交会图版作为分析单元,计算出各种流体识别概率,将概率最大的流体性质作为判断结果。该方法充分利用已有的测井、气测录井等资料,同时考虑各个图版资料来源的可靠性及各个图版识别概率的影响,判断结果精确。将研究方法应用于南海西部海域复杂储层流体识别中,取得了很好的效果,流体识别符合率达90.3%,可为地层评价和油气勘探开发随钻分析提供快速和准确的决策。It was usually to take the result of one or few number of crossplots as the final conclusion,however,there possibly existed some other results which were not consistent with them.Therefore,according to the technique of crossplot,the total probability formula was first used for qualitative identification of fluids.The corresponding probability to each fluid property was calculated by the unit of crossplot,and the biggest one was taken as final judging result.In order to get a accurate result,by making full use of well logging and gas logging data during the process of crossplot optimization,the reliability for sources of data and the identification probability in each crossplot was considered simultaneously.The method was applied to fluid identification of complex reservoirs in the western South China Sea,and the coincidence rate reached 90.3%.It indicates that it has the ability of quick and correct decision for formation evaluation and supporting analysis while drilling in exploration and development of oil and gas.

关 键 词：流体识别 交会图 全概率公式 复杂储层 南海西部 

分 类 号：P631.84[天文地球—地质矿产勘探]