摘要
江西省弋阳盆地发育于白垩纪，中白垩世为盆地发展期，晚白垩世为盆地定型期。在北东向的赣东北等大断裂控制下，形成了盆地西部和东部２个断拗型凹陷，西部凹陷中白垩统冷水坞组二段有较好的生油条件，上白垩统周家店组也有一定生油条件。根据对物探、钻井及地面地质资料的综合研究，勘探目的层主要为冷水坞组和周家店组，西部凹陷和罗圹斜坡为石油勘探的有利地区。根据岩心观察及对地表油苗的连续追踪研究，认为圈闭类型主要有岩性圈闭、断裂岩性圈闭和断裂带附近的裂缝型圈闭，石油聚集受构造、物性和裂缝系统的共同控制，可能形成受箕状断陷背景控制的复式油藏。对盆地的进一步勘探与研究提出了建议。
Yiyang basin, Jiangxi province was developed in Cretaceous age. Middle Cretaceous is its development period, and Late Cretaceous is its model fixed period. Under the control of the North East major fault in northeastern Jiangxi province, two fault downwarping type sags were developed in eastern and western parts of the basin, respectively. In the western sag better conditions of oil generation was present in the second section of Lengshuiwu Group, Middle Cretaceous, and moderate conditions for oil generation is also present in the first section of Zhoujiadian Group, Upper Cretaceous. Based on a comprehensive study of geophysical, drilling and surface geological informations, main targets will be Lengshuiwu Group and Zhoujiadian Group; western sag and Luokuang slope are favorable regions for oil exploration. From the observation of cores and a continuous tracing of oil seepages main types of oil trap may be lithologic traps, fracture lithologic traps, and fracture trap near the fault. Oil accumulation is jointly controlled by structure, petrophysical properties and fractures and complex reservoirs may be resulted from dustpan fault depression as a background. Suggestions for further study and further oil exploration are given in this paper.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1998年第6期23-25,共3页
Petroleum Exploration and Development
关键词
石油聚集
盆地
石油勘探
Jiangxi, Yiyang basin, Sedimentary facies, Oil and gas show, Reservoir type, Prediction
