鄂尔多斯盆地西南部延长组过剩压力与油藏的关系  

Overpressure Relation to Oilfields in Yanchang Formation SW Ordos Basin

作　　者：杨飏[1] 郭正权[2] 黄锦绣[2] 杜金良[1] 

机构地区：[1]西北大学地质学系,陕西西安710069 [2]长庆油田公司勘探开发研究院,陕西西安710021

出　　处：《地球科学与环境学报》2006年第2期49-52,共4页Journal of Earth Sciences and Environment

基　　金：国家重点基础研究发展规划项目(2003CB214607)

摘　　要：鄂尔多斯盆地西南部长8油藏的发现,揭示出盆地长8具有形成大中型油田的地质条件。从流体运移的角度,应用平衡深度法原理,计算出过剩压力,建立了研究区的过剩压力体系,分析产生过剩压力的地质条件及控制因素,认为长7段的过剩压力是油气初次运移的主要动力,并根据不同层段之间过剩压力差值,预测出有利目标区,为寻找类似油田提供了理论依据。The find of Xifeng oilfields from the Chang8 formation in the Southwestern Ordos basin implies that the Chang8 possesses the geological condition to form great oilfields. Using balance depth principle, this paper calculates overpressure in the oilfield, set up overpressure system, analyzes the geological condition and control factor to form overpressure, and realizes that overpressure of chang7 serves as the important power for the oil primary migration. According to the difference in overpressure in different layers and sections, favorable target areas are predicted. This work supplies a theory to find the similar large oilfields.

关 键 词：鄂尔多斯盆地 过剩压力 运移 目标预测 油藏 

分 类 号：P618.130.1[天文地球—矿床学]