高校地质学报2012，Vol.18Issue(3)：465-473,9.
鄂尔多斯盆地东部深层煤层气成藏地质条件分析
Analysis of Geological Conditions of Deep Coalbed Methane Reservoiring in the Eastern Ordos Basin
摘要
Abstract
Burial depth of the developing coalbed methane (CBM) fields in the eastern Ordos Basin is less lhan 1200 m. Abundant deep CBM resources need to be explorated and developed. For this reason, occurrence, coal-rank, CBM content and distribution of deep coal seams in the eastern Ordos Basin were analyzed. It was suggested that the regional distribution pattern of the gas-bearing characteristics and permeability of depth coal seams might be further complicated due to the overlay of two westward protruding shallow zone to overall depth pattern of the Upper Paleozoic. It was found that the regional coal-rank occurrence of the Late Paleozoic coal seams is similar to that of coal seam depth, which indicates a major control of deep burial metamorphism to the coal rank setting. Occurrence of deep CBM content was predicted. It was suggested that the content might decrease with the increase of the depth once the burial depth of coal seam exceeds ^C critical depth. Two types of coal-derived gas reservoir models were set up including self-generation plus self-storage, endogenous generation plus exogenetic storage. It was suggested that the paragenesis of both adsorption CBM and free coal-derived gas reservoirs provides a viable resource for the gas combined development.关键词
鄂尔多斯盆地/深部煤层气/赋存特征/成藏模式Key words
Ordos Basin/ deep CBM/ occurrence/ reservoiring model分类
天文与地球科学引用本文复制引用
陈刚,秦勇,李五忠,申建..鄂尔多斯盆地东部深层煤层气成藏地质条件分析[J].高校地质学报,2012,18(3):465-473,9.基金项目
国家重大科技专项(2011ZX005033-03,2011ZX05034-04)资助 （2011ZX005033-03,2011ZX05034-04）
