姬塬油田浅层高效油藏识别方法的应用

Application of shallow efficient reservoir identification method in Jiyuan oilfield

鄂尔多斯盆地油藏埋深浅、储层孔渗条件好,具备较高的经济开发效益,但由于姬塬油田勘探开发程度高,目前尚未发现的浅层高效油藏存在隐蔽性强、油藏规模小、局部富集高产等特征,常规的勘探评价方法难以满足实际效益建产需求。因此,本文立足于生产实践,以老井复查为基础,创新形成了5项关键技术:目标区预测技术、精细砂体刻画及预测技术、精细测井二次解释技术、有利区优选技术、措施井优选评价技术。建立了浅层高效油藏识别技术序列,应用此技术序列成功勘探开发了G179长2油藏,达产年井均产能3.4 t。结果表明,浅层高效油藏在有利区范围内取得了滚动建产效益好的成果。研究成果对于姬塬油田浅层高效油藏的勘探开发具备指导意义。

Reservoirs with shallow burial depth and good reservoir porosity and permeability conditions in the Ordos Basin have high economic development benefits.However,due to the high level of exploration and development in the Jiyuan oilfield,the shallow efficient reservoirs that have not yet been discovered have characteristics such as strong concealment,small reservoir scale,and local enrichment and high production.Conventional exploration and evaluation methods are difficult to meet the actual needs of efficiency construction.Therefore,based on production practice and the review of old wells,this article innovatively formed five key technologies,including target area prediction technology,fine sand body characterization and prediction technology,fine logging secondary interpretation technology,favorable area selection technology,measure well optimization evaluation technology,and established a sequence of shallow efficient reservoir identification technologies.The G179 Chang 2 oil reservoir was successfully explored and developed using this technology sequence,annual average well production capacity of 3.4 tons after reaching production capacity.The results indicate that shallow efficient reservoirs have achieved good results in rolling production efficiency within favorable areas.The research results have guiding significance for the exploration and development of shallow efficient reservoirs in Jiyuan oilfield.