古地理学报2013，Vol.15Issue(1)：31-42,12.DOI:10.7605/gdlxb.2013.01.003
内蒙古二连盆地阿北凹陷下白垩统近岸水下扇沉积特征
Sedimentary characteristics of nearshore subaqueous fans of the Lower Cretaceous in Abei sag of Erlian Basin, Inner Mongolia
摘要
Abstract
Abei sag, with 600 km2 of area, is one of the most promising exploration area in northeastern Erlian Basin, Inner Mongolia. Considering the complicated geological structure of Abei sag, based on core, logging, well logging and seismic data, this paper analyzed the depositional characteristics and distribution laws of nearshore subaqueous fans in the Lower Cretaceous in northern steep slope zone of the Abei sag in Erlian Basin. The results show that the subaqueous fan and the fan-delta facies were different in hthologic series, sedimentary structure, grain size characteristics, well logging curve and seismic reflection structure, which indicated the gravity flow depositional environment. The deposition of northern steep slope zone developed large-scale nearshore subaqueous fans, and the distribution scale of the fan bodies reduced to northern provenance step by step in ascending order during the Aershan Age. The dark colored mudstones of deep lacustrine and half-deep lacustrine was formed, which the sand bodies of the near-shore subaqueous fans cut down during Tenggeer Age. It makes the study area of the nearshore subaqueous fans have superior oil and gas accumulation conditions.关键词
内蒙古/二连盆地/阿北凹陷/下白垩统/近岸水下扇Key words
Inner Mongolia/Erlian Basin/Abei sag/Lower Cretaceous/nearshore subaqueous fan分类
天文与地球科学引用本文复制引用
梁官忠,谭建财,魏莉,王芳,姜燕,曹伟,吴旺林,郭晓光..内蒙古二连盆地阿北凹陷下白垩统近岸水下扇沉积特征[J].古地理学报,2013,15(1):31-42,12.基金项目
教育部重大专项"复杂油气藏精细表征及剩余油分布预测"(编号:2009ZX05009)资助 （编号:2009ZX05009）
