面向实际储层的流体因子优选方法  

Reservoir-oriented fluid factor optimization method

作　　者：桂金咏[1,2] 高建虎[1] 李胜军[1] 李海亮[1] 王万里[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020 [2]中国石油天然气集团公司油藏描述重点实验室,甘肃兰州730020

出　　处：《石油地球物理勘探》2015年第1期129-135,18,共7页Oil Geophysical Prospecting

基　　金：国家重大科技专项课题"大型油气田与煤层气开发"(2011ZX05007-006;2011ZX05004-003)资助

摘　　要：本文提出了面向实际储层的流体因子优选方法,该法的实质同传统岩石物理交会分析、Dillon流体指示因子相同,都是利用测井曲线及测井解释成果曲线进行流体因子的优选,并将井点优选结果推广到全区。但传统岩石物理交会分析方法效率太低,面对数目庞大的流体因子,通过两两组合进行交会,不仅繁琐且工作量较大,盲目性太强。而Dillon方法需已知全区岩性分布范围,未考虑背景岩性的影响,对于多种流体类型共存的情况,并没有给出明确的流体指示系数计算方式。为此,本文在传统方法的基础上,结合统计理论,首先进行流体因子对不同流体储层与背景岩性的区分能力对比,然后再进行不同流体储层识别能力的对比,从而优选出不受背景岩性与流体类型数目影响的流体因子。文中方法较好地保留了Dillon流体指示系数的优点,在兼顾实际测井资料的误差以及数据叠置等问题的同时,将背景岩性的影响纳入到识别能力评价标准中,且能够适合多种流体类型共存的情况。本文方法可在全区岩性分布未知的情况下,开展流体识别工作。We propose in this paper a reservoir-oriented fluid factors optimization method.Same as the common cross plot analysis and Dillon's fluid indicator coefficient,this method uses the logging curves and the interpretation results to select the best fluid factor at a point,and then extend this result to the whole area.However,the cross plot analysis method is inefficiency with heavy calculations and high blindness due to a large number of fluid factors.The Dillon's fluid indicator coefficient needs to know the lithology distribution and do not consider the influence of background lithology.Furthermore,it has no explicit formula when multiple fluids exist.Based on conventional methods and statistical theory,we firstly analyze identification ability of fluid factor between different fluid reservoirs and background lithology,and then compare identification ability among different fluid reservoirs.Finally a fluid factor without influence by lithology and fluid types is selected.The proposed method owns the advantage of Dillon's fluid indicator coefficient,considers background lithology influence in fluid factor evaluation,and can adapt to multiple fluids existence.This method can perform fluid identification even the lithology distribution is unknown.

关 键 词：流体因子 优选 背景岩性 交会分析 流体因子识别 流体指示系数 

分 类 号：P631[天文地球—地质矿产勘探]