摘要
在Fula坳陷Abu Gabra组划分出5种主要地震相:亚平行平行席状相、前积楔状相、前积充填相、上超充填相和杂乱地震相。结合岩心资料识别出三角洲相和湖泊相以及多个亚相和微相,并认为可容空间的变化导致了退积型三角洲的形成。断裂坡折和挠曲坡折的存在控制了沉积体系的展布和油气藏的形成,断裂坡折上方发育断层遮挡油气藏,下方斜坡扇易形成湖泛面遮挡油气藏,挠曲坡折控制下的浊积扇体则易形成构造-岩性油气藏。
In Abu Gabra Formation in Fula depression, like seismic facies, prograde-wedgelike seismic facies, five seismic facies are identified as parallel （subparallel）-sheetprograde-filled seismic facies, onlap- filled seismic facies and chaotic seismic facies. With combination of cores analysis, delta facies, lacustrine facies and many subfacies and microfacies are recognized here. The variation of accommodation space results in the formation of retrogradational delta. The distribution of sedimentary system and the formation of reservoirs are controlled by fracture slope break and bending slope break. On the top of fracture slope break, fault screened hydrocarbon reservoirs are developmental, and flooding surface screened hydrocarbon reservoirs are developed in the slope fan which is below the fracture slope break. Structural-lithologic hydrocarbon reservoirs are object to be developed in the turbidite fan which is controlled by the bending slope break.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2007年第5期41-44,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然科学基金(40672078)资助项目
关键词
沉积相
退积型三角洲
坡折带
成藏控制因素
sedimentary facies
retrogradational delta
slope break
hydrocarbon generation controlling factors
