灰色系统储盖组合精细评价的分析方法

FINE EVALUATION OF RESERVOIR-CAP COMBINATION USING GRAY SYSTEM

利用灰色系统理论研究测井、钻井取心、试油及有关地质资料 ,通过匹配、拟合和提取参数 ,以统计分析特征值及其准确率、分辨率研究精细划分地层岩性、物性、含油性和盖层质量。以塔中志留、泥盆系及石炭系东河砂岩资料为基础 ,给出了灰色系统储盖组合精细评价参数、标准和权系数 ,分析了储、盖层精细评价的处理方法和应用实例。对塔里木、辽河、华北、二连、延长等油田储、盖层的精细评价和综合解释 ,计算了主要目的层段储、盖层参数、排驱压力或突破压力 ,分析了岩性、物性、含油性及盖层质量类别、等级 ,以及储层、盖层的搭配关系和油、气、水层解释 ,为不同类型油气藏进一步勘探开发提供了相应的地质依据。

By the use of logging,coring,production test and concerning geology data to match,fit and extract parameters,the eigenvalue as well as its accuracy and distinguishability were statistically analyzed,and the formation lithology,physical properties,oil_bearing property and cap quality were evaluated.A cording to the characteristics of Donghe sandstone in the Silurian,Devonian and Carboniferous formations in Tazhong Oilfield,the parameters,standards and weight coefficients for fine evaluation about reservoir_cap combination are presented on the basis of the gray system.A method for the fine evaluation and the handling examples were given.In accordance to the integrated interpretation results of some oilfields,such as Tarim,Liaohe,north China,Er_lian,Yan_chang,the reservoir_cap strata parameters,driving pressure,breaking pressure in main intended zones were calculated.Meanwhile,the formation lithology,physical properties,oil_bearing property and cap quality were analyzed,and the relationship between reservoir strata and cap strata is interpreted.The results may be the basis for prospecting various reservoirs.