金湖凹陷南部戴南组一段物源分析  

Provenance research of first member of Dainan Formation in the South of Jinhu Sag

作　　者：刘喜欢[1] 杨立干[1] 龚志祥[1] 方涛[1] 张乾[1] 

机构地区：[1]中国石化江苏油田分公司地质科学研究院,江苏扬州225009

出　　处：《复杂油气藏》2011年第4期18-21,共4页Complex Hydrocarbon Reservoirs

基　　金：江苏油田分公司(JS09002)

摘　　要：在戴南组一段寻找隐蔽油气藏是金湖凹陷近年来的重要勘探方向。结合地质背景,利用重矿物含量及组合、砂岩岩石学特征、砂岩百分含量等对金湖凹陷南部戴一段的物源体系开展了研究,认为区内主要存在来自西南方向和来自北东方向经较长距离搬运的两大远源沉积,同时还存在来自工区南部经短距离搬运的近源沉积。戴一段早、中、晚期砂岩分布既有继承性也存在差异性,龙岗次凹东部是寻找隐蔽油气藏的最有利地区。Searching subtle traps in first member of Dainan Formation （ E2d1） is one of the important tasks in Jinhu Sag. From the aspects of heavy mineral content, mineral composition and sandstone percentage, the provenance of E2 d1 in the South of Jinhu Sag was analyzed in combination with the tectonic. The results indicated that there were two major far sedimentary provenance,in which one came from the southwest and the other came from northeast. In addition, there was a secondary provenance which was a short distance transportation and quick accumulation from south of the area. From early to late, the direction of the provenance was inherited, but sandstone distributed differently. The east of Longgang Depression is considered as the advantageous area of seeking subtle reservior.

关 键 词：物源 重矿物 成熟系数 金湖凹陷 

分 类 号：TE122.3[石油与天然气工程—油气勘探]