摘要
综合分析研究区岩心、钻井资料,对呼和湖凹陷南部地区南屯组含煤地层进行了高分辨率层序划分,将南屯组地层划分为1个长期基准面旋回、6个中期基准面旋回和16个短期基准面旋回,中期基准面旋回可分为3类、短期基准面旋回可分为2类。通过含煤地层的岩性特征、沉积环境及聚煤作用研究,将该区南屯组煤层划分为3个聚煤阶段,认为煤层主要发育于辫状河三角洲沉积相带。
Through the comprehensive analyses of core and drilling data from the researched area, the division of high-resolution sequences is conducted for the coal-bearing strata in Nantun Formation of Huhe Lake Sag ： one long- term base-level cycle, six mid-term base-level cycles and sixteen short-term base level cycles, and furthermore the latter can be classified into two kinds and the middle can be divided into 3 kinds. By the means of the researches on the lithologic characteristics, sedimentary environments and coal accumulation action of the strata, three stages of coal accumulation can be detailed and moreover the coal seams of the region are mainly developed in the delta sedimentary facies belts of the braided rivers.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2013年第4期15-19,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家大型油气田及煤层气开发科技重大专项课题(2011ZX05007-002)
关键词
高分辨率
层序地层学
基准面旋回
聚煤规律
high resolution
sequence stratigraphy
base/datum-level cycle
coal accumulation law
