We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
贵州省煤系气成藏条件及勘探方向.
- Authors
高 为; 易同生; 颜智华; 金 军
- Abstract
Based on the exploration knowledge in recent years, the basic characteristics of coal measure gas in Guizhou province are described, the geological conditions of coal measure gas accumulation are studied, and the exploration potential of coal-derived gas in different layers is analyzed. The results show that the Longtan Formation and the Jiusi Formation are the main layers of coal measure gas exploration in Guizhou. The Longtan Formation widely developed thin to medium-thick coal seam groups with relatively high coal rank. The gas content of coal seam is much higher than that of non-coal seam, and the spatial distribution of source rock is unstable. The physical properties of different lithological reservoirs vary significantly, with the delta-phase sandstones and mud shales being weakly brittle and the tidal-lake-phase sandstones and mud shales having good brittleness. The vertically-stacked gas-bearing system is developed, and it is difficult to select favorable sections and reform the combined layers, and the mining compatibility problem is prominent. The Longtan Formation mainly develops two main types of independent coalbed methane reservoir with “source-reservoir integration type”, and coal measure gas combination gas reservoir with “source-reservoir adjacent type” (coalbed methane + shale gas + tight sandstone gas) . The two secondary gas reservoir types are “source-reservoir integration type” coal measure “two gas” (coalbed methane + shale gas) combined gas reservoir, “lower source and upper reservoir type” coal measure “two gas” (coalbed methane + tight sandstone gas) combined gas reservoir. The Jiusi Formation is a medium-sized gas-rich reservoir that shale and thin coal seam are alternate with large thickness, all kinds of reservoirs have moderate gas-content and fragility, with relatively good homogeneity, which is helpful to reform consolidation reservoirs. The Jiusi Formation mainly develops two types of gas reservoirs: “source-reservoir integration type” independent shale gas reservoirs and “source-reservoir integration type” coal measure “two-gas” ( shale gas + coalbed methane) combined gas reservoirs.
- Publication
Natural Gas Geoscience, 2022, Vol 33, Issue 5, p799
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2021.10.017