摘要
利用构造、层序地层、沉积古地貌、沉积微相分析、成藏综合分析等方法,对珠江口盆地文昌B凹陷陡坡带特殊构造背景下的珠海组储层沉积相及其油气成藏模式进行研究,认为该区珠海组二段与珠海组一段构成了一套优质区域性储盖组合,珠海组二段沉积期,在陡坡带古丘地貌上发育潮控海侵退积型扇三角洲相,其水下分流河道骨架砂岩较好的孔渗性使珠海组二段成为油气优势运聚成藏层系,是主要勘探目的层之一。结合烃源岩、沟源断裂及圈闭等成藏主控因素分析,提出该区珠海组二段"垂向运移、优势聚集、有效断块"的油气成藏模式,钻探发现文昌B凹陷陡坡带X构造整装规模储量的商业性油田和一批含油构造。
Reservoir depositional model under special tectonic setting of Zhuhai Formation and its pool-forming pattern on the abrupt slope area in Wenchang B sag were studied by means of structure-sequence stratigraphy,sedimentary paleo-morphology,sedimentary micro-facies,and intergraded pool-forming analysis methods.The first and second members of Zhuhai Formation formed a good regional reservoir and cap rock assemblage.The tide-dominated transgression retrograding fan deltas of the second member of Zhuhai Formation is controlled by paleo-mound and swale morphology.The good reservoir property in permeability made the second member of Zhuhai Formation one of major strata for hydrocarbon migration and accumulation.Through the analysis,the main pool-forming factors are controlled by source rock,faults and traps,and the pool-forming pattern is characterized by vertical migration,preferential accumulation and valid sealing fault block.Exploration direction was predicted and proved by drilling recently.A new commercial oil field and several oil-bearing fault blocks were discovered in the abrupt slope area of Wenchang B sag.
出处
《矿物岩石》
CAS
CSCD
北大核心
2011年第2期86-95,共10页
Mineralogy and Petrology
基金
中国地质调查局蒙古自治区地质勘查招标项目(2005-(2-13)-KD71)
关键词
文昌B凹陷
陡坡带
珠海组二段
古丘-洼
潮控海侵退积型扇三角洲
成藏模式
Wenchang B sag
abrupt slope area
The second member of Zhuhai Formation
Paleo-mound-swale
tide-dominated transgression retrograding fan delta
pool-forming pattern
