庞军刚,李文厚,郭艳琴,王起琮,陈全红,梁积伟
PANG Jun-gang~1,LI Wen-hou~2,GUO Yan-qin~1,WANG Qi-cong~1,CHEN Quan-hong~2,LIANG Ji-wei~2(1.Xi′an Oil University

• 1:西安石油大学油气资源学院
• 2:西北大学地质学系
• 3:西安石油大学油气资源学院
• 4:西安石油大学油气资源学院

摘要(Abstract)：

针对陕北子洲地区山西组是否受海水影响的争议,对该组岩石进行了微量元素测试。结果显示山西组的古环境以淡水为主,但间或受海水的影响。根据野外露头和岩心观测,依据沉积旋回、岩电特征、沉积构造等,识别出研究区山西组为曲流河三角洲,发育三角洲前缘,以水下分流河道广泛发育为特征,并构成研究区天然气的主要储集砂体,可进一步划分为水下分流河道、分流间湾、间湾沼泽等微相;论述了山23段沉积微相的平面展布。
Aimed at the discussion that the paleo-environment was or not influenced by seawater when Shanxi Formation was deposited,microelement testing is analyzed.And the result shows that the water in paleo-environment mainly was freshwater,but periodly influenced by seawater.Applied with field outcrop and core description,combining with sedimentary cycle,the character of lithology and electromotive curve,sedimentary structure etc,the front delta in meandering delta of Shanxi Formation are identified in study area,in which subaqueous distributary channels were developed widely and was the main sand body for gas accumulation.Furthermore,sub-aqueous distributary channel,inter-distributary bay,inter-distributary swamp etc are main micro-facies in front delta.The sedimentary microfacies of Shan_2~3 in plane are discussed.

关键词(KeyWords)： 山西组;三角洲;古盐度;沉积微相;陕北子洲地区
Shanxi Formation;delta;paleosalinity;sedimentary micro-facies;Zizhou region

Abstract:

Keywords:

基金项目(Foundation): 国家重点基金研究发展计划(973)项目(2003CB214602)

作者(Author): 庞军刚,李文厚,郭艳琴,王起琮,陈全红,梁积伟
PANG Jun-gang~1,LI Wen-hou~2,GUO Yan-qin~1,WANG Qi-cong~1,CHEN Quan-hong~2,LIANG Ji-wei~2(1.Xi′an Oil University

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