A composite index estimation method and its application to all-round evaluation of exploration success
All-round evaluation of exploration success may provide technological support for persistent triumph in petro-leum companies.The success should be in-depth evaluated from critical aspects but optimal countermeasures taken to achieve the goal of boosting quality and performance.Therefore,taken the exploration in both conventional and tight gas in one basin of west China as an example,essential controls on this exploration success were discussed,and the index scheme,containing five first-class indexes and 10-plus second-class ones,was established.Moreover,the technique for or-der preference by similarity to ideal solution(TOPSIS)was integrated with another rank-sum ratio(RSR)to form one ap-proach to estimate the composite index.And the comprehensive system was created to evaluate this success.On top of that,it was applied to some evaluation in terms of certain times as well as various exploration domains and trap types.Re-sults show(i)better fruitfulness acquired since the Twelfth Five-Year Plan;(ⅱ)the best in the Sinian to the Lower Paleozo-ic exploration among the key domains,and poor in the Lower Permian Qixia to Maokou formations,the Lower Triassic Jial-ingjiang Formation to the Middle Triassic Leikoupo Formation,and the Carboniferous;and(ⅲ)the best exploration in com-pound-trap gas reservoirs,followed by lithological trap,and the worst in structural trap.In conclusion,reliability analy-sis reveals these results are basically identical with exploration practice.With objective and reasonable assessment,the sys-tem offers reference for both exploration supervision and decision-making analysis.
Exploration successTOPSISRSRComposite index estimation method
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