济阳坳陷孤岛潜山油气充注特征  

Characterstics of the evidences of oil and gas injection in the Gudao buried hill of Jiyang depression,Shandong,China

作　　者：石砥石[1] 

机构地区：[1]胜利油田地质研究院,山东东营257000

出　　处：《成都理工大学学报（自然科学版）》2008年第5期512-516,共5页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家重点基础研究发展计划"973"项目(2005CB422106)

摘　　要：岩心观察、录井资料和有机地球化学分析表明,孤岛潜山曾有过两期油气充注。早期充注的油藏受到了强烈的生物降解作用改造,绝大多数样品中均存在25-降-17α,21β-藿烷。晚期所充注的油藏未受到生物降解作用的改造。早期和晚期所充注的油藏流体分别来自于沙三段和沙一段烃源岩。已成藏于古潜山中的油藏受到改造和破坏后,先存油藏向上运移聚集到上覆不同层位的储层中,形成多层位充注和上部层位较下部层位油气相对富集的特征,使古潜山中不能形成规模性油气藏。Based on the core observation, log data and organic geochemical analysis, the evidences of oil and gas injection of two stages can be identified in the Gudao buried hill of Jiyang, Shandong. The early petroleum has been violately biodegraded and 25-norhopane can be found in most of the samples. The later petroleum has not undergone any biodegradation. The petroleum fluid charged in early and late stages are from the source rocks of Member 1 and Member 3 of Shahejie Formation of Paleogene System, respectively. The petroleum fluid migrated upward and accumulated in overlying different reservoirs after the oil pools accumulated in buried hill were destroyed, and the characteristics such as injection in multiple reservoirs and relative enrichment in the upper reservoir can be observed. The absence of abundant oil pools in the buried hill can be ascribed to the effusion of oil and the bad preservation conditions.

关 键 词：孤岛 古潜山 油藏流体 生物降解 充注 

分 类 号：TE122.12[石油与天然气工程—油气勘探]