以塔中16-161井區(qū)為例,探討了隨機模擬技術(shù)在油田勘探階段油藏描述中的應(yīng)用。針對勘探階段油藏鉆井少、生產(chǎn)數(shù)據(jù)缺乏的實際情況,對儲層隨機模擬過程中出現(xiàn)的問題,如變異函數(shù)求取、模型的篩選等,進行了初步的分析,并提出了相應(yīng)的解決方法。利用序貫高斯模擬、指示高斯模擬和模擬退火對該井區(qū)的儲層參數(shù)進行了隨機建模,較好地描述了儲層空間分布的不確定性,發(fā)現(xiàn)了潛在的油藏延伸帶,并給出了油氣儲量的可能分布,為油田的下一步勘探及油田的開發(fā)風險分析提供了依據(jù)。 Stochastic simulation and its application to reservoir characterization in the exploration stage are discussed taking 16th district of Tazhong oilfeild as an example. Several problems, such as calculation of vargiom and model selection resulted from sparse well and lack of production data, are analyzed, and resolvents are presented. Three methods of SGS, SIS and SAS are adopted to simulate reservoir parameters. The stochastic model reveals uncertainty of reservoir distribution. The potential reserves and drilling opportunities are found.