岩石矿物学杂志2024，Vol.43Issue(4)：889-904,16.DOI:10.20086/j.cnki.yskw.2024.0407
陇东太原组铝土岩分布特征及成藏主控因素
Distribution characteristics and main controlling factors of accumulation of bauxite rock in Taiyuan Formation in Longdong area
肖文同 1和丽安 1王雷 2王文泽 3马喆 3朱佳宝2
作者信息
- 1. 中国石油集团西部钻探工程有限公司录井工程分公司,新疆克拉玛依 834000
- 2. 中国石油集团东方地球物理勘探有限责任公司研究院长庆分院,陕西西安 710000
- 3. 中国石油集团测井有限公司长庆分公司,陕西西安 710000
- 折叠
摘要
Abstract
Recently,the bauxite gas reservoir of Taiyuan Formation has become a hot spot of exploration in Long-dong area of Ordos Basin.In order to systematically explore the distribution of bauxite rock and the main controlling factors of reservoir formation,based on the latest drilling cores,rock slices,three-dimensional seismic,logging,scanning electron microscopy,model forward modeling and other methods,the distribution characteristics of bauxite rock in Taiyuan Formation were studied in detail,and then the main controlling factors of bauxite rock reservoir for-mation were expounded.The results show that the aluminiferous rock series has a typical five-stage type in the lon-gitudinal direction,in which the C section is the main reservoir section of the bauxite rock,and the content of dia-spore is more than 80％.The longitudinal lithologic association of the aluminiferous rock series is mainly controlled by the karst paleogeomorphology unit.The distribution characteristics of bauxite in karst highland,karst slope and karst depression are punctate,banded and flaky,respectively.The bauxite reservoir in the karst slope area is the most developed.The enrichment of natural gas in bauxite rock is mainly controlled by high-quality reservoirs,faults,fractures and structural positions.Reservoirs are the premise of natural gas enrichment and high yield.Early faults show construction effect,and late faults show destruction effect.Fractures can improve reservoir physical proper-ties.Low-amplitude structures or nose-like traps in high structural parts are more likely to accumulate.Karst slope area is the most favorable paleogeomorphologic unit for natural gas accumulation in bauxite rock.关键词
鄂尔多斯盆地/岩溶古地貌/含铝岩系/分布特征/天然气富集Key words
Ordos Basin/karst paleogeomorphology/aluminiferous rock series/distribution characteristics/natu-ral gas enrichment分类
天文与地球科学引用本文复制引用
肖文同,和丽安,王雷,王文泽,马喆,朱佳宝..陇东太原组铝土岩分布特征及成藏主控因素[J].岩石矿物学杂志,2024,43(4):889-904,16.
