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本文在总结川东地区现已勘探开发的石炭系气藏天然气不同充满度类型的基础上，探讨了控制天然气充满度的主要因素。提出多烃源是形成高充满度气藏的物质基础，志留系是为石炭系气藏提供天然气的重要气源，开江古隆起－坡带的历史继承发展，控制了烃类的富集和保存，是形成高充气藏的又一重要原因，断层及各种圈闭等保存条件是形成天然气充满度高低的直接原因，进而指出在开江古隆起－斜坡带有关的高陡构造带的两翼或两端的潜伏构造及

DISCUSSION ON THE TYPES OF GAS PACKING DENSITY AND CONTROL FACTORS IN CHUANDONG CARBONIFEROUS RESERVOIRS.

On the base of summarizing the different packing density types of carboniferous gas developed in Chuandong area, the main factors of controlling gas packing density are discussed. It is proposed out that multiple hydrocarbon sources are the substance foundation of forming high packing density gas reservoirs. Silurian is the important source providing gas for carboniferous reservoirs. The reason for forming high packing density reservoirs is the hydrocarbon enrichment and preservation controlled by the historical and successive development of Kaijiang palaeohighslope belt. The immediate cause of influencing gas packing density is preservation conditions of faults and various traps. The low-secular and low-steep anticlines in the buried structures and synclines on the two wings or two ends of the high-steep structures being relative to Kaijiang palaeohigh slope belt have good exploration potential for drilling high packing density gas in carboniferous reservoirs.