鄂尔多斯盆地天环拗陷南段水文地质特征与油藏富集规律  

Hydrogeologic Features and Enrichment Laws of Oil Reservoirs in South Tianhuan Depression,Ordos Basin

作　　者：惠潇[1] 田永强[2] 

机构地区：[1]长庆油田公司勘探开发研究院,陕西西安710021 [2]长庆油田公司勘探部,陕西西安710021

出　　处：《地球科学与环境学报》2008年第3期278-282,共5页Journal of Earth Sciences and Environment

基　　金：中国石油天然气股份公司科技项目(060106)

摘　　要：从油田水文地质的角度,在鄂尔多斯盆地天环拗陷南段开展了流体运移和油藏保存条件及富集规律的研究。受断层、古河侵蚀等作用影响,地层水从拗陷中心向两侧运移;地层水矿化度和氯离子质量浓度的分析表明:延长组地层封闭性好于延安组地层;油田水高矿化度、低还原系数区地层封闭性好,为石油勘探的有利目标。Fluid migration, saving conditions and enrichment laws of oil reservoirs in South Tianhuan depression of Ordos basin are researched from the viewpoint of oilfield hydrogeology. Under the control of fault and ancient river erosion, the groundwater migrates from the centre of depression to the margin. The salinity analyses of oilfield water and mass concentration of chloride ions indicate that the sealing conditions of Yanchang Formation are better than Yan＇an Formation. Areas with good sealing conditions, in which the oilfield water have high salinity and low values of deoxidizer coefficient, are favorable aims for oil exploration.

关 键 词：天环拗陷 水文地质 油藏富集规律 油田水 

分 类 号：P641.642[天文地球—地质矿产勘探]