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鄂尔多斯盆地陇东ZH区致密砂岩油藏成藏主控因素 被引量:3

Main Control Factors of Hydrocarbon Accumulation in Tight Sandstone Reservoir in Longdong ZH Area,Ordos Basin
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摘要 鄂尔多斯盆地ZH地区长7段、长6段的砂体、物性在空间上分布复杂多变,物性与油藏的对应关系不清,控制油气藏分布机理不明等因素制约着油田的高效开发。为探索致密砂岩油藏成藏主控因素,通过沉积相分析、储层特征、烃源岩识别与分布等研究,确定了ZH地区的成藏模式为自生自储型或下生上储型,近烃源岩区域的储层含油饱和度更高,运用综合评价方法,将油藏划分为3种类型,其中:油藏产油潜力从第Ⅰ类至第Ⅲ类依次递减。研究认为,油源对油藏分布起重要的控制作用,物性优势对成藏贡献有限,长7段成藏的主要控制因素为近油源,长6段成藏因素为“近源+好物性”组合控藏。 The spacial distribution of sand bodies and physical properties of Chang 7 and Chang 6 member in ZH aera of Ordos Basin is complex and variable.The relationship between the physical properties of reservoirs and the oil reservoirs is not clear,and the mechanism of controlling the distribution of reservoirs is also not clear,which restricts the efficient development of oil and gas reservoirs.In order to explore the main control factors of hydrocarbon accumulation in tight sandstone reservoirs,through the analysis of sedimentary facies and reservoir characteristics,the identification of source rocks and the study on the distribution of source rocks,the hydrocarbon accumulation patterns in ZH area are determined,that is,self‘generation and self storage’and‘lowergeneration and upper storage’mode,and the reservoirs near the source rocks have higher oil saturation.The reservoir in the study area was divided into three types by the comprehensive evaluation method.Among them,the oil production potential of typeⅠreservoir is the highest,followed by typeⅡandⅢreservoirs.It is held that oil source plays an important role in controlling the distribution of oil reservoir,and physical property has a limited contribution to hydrocarbon accumulation.The cause of hydrocarbon accumulating in Chang 7 member is near oil source,and the causes of hydrocarbon accumulating in Chang 6 member are near oil source and good physical property.
作者 邵晓岩 邹国亮 杨艳宁 李涛涛 杨艳丽 刘永涛 杨文飞 SHAO Xiaoyan;ZOU Guoliang;YANG Yanning;LI Taotao;YANG Yanli;LIU Yongtao;YANG Wenfei(Changqing Oilfield Company,CNPC,Xi'an,Shaanxi 710018,China)
出处 《西安石油大学学报(自然科学版)》 CAS 北大核心 2020年第6期10-16,29,共8页 Journal of Xi’an Shiyou University(Natural Science Edition)
基金 国家自然科学基金“致密油循环水力压裂裂缝形成及渗流力作用机理研究”(51974253) 陕西省教育厅重点项目“考虑参数不确定性的致密油气藏压裂优化设计方法”(18JS085)。
关键词 致密砂岩油藏 沉积微相 油藏特征 成藏主控因素 鄂尔多斯盆地 tight sandstone reservoir sedimentary microfacies reservoir characteristics main controlling factors of hydrocarbon accumulation Ordos Basin
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