鄂西-渝东区石炭系油气成藏影响因素及富集规律

针对鄂西－渝东区近年钻探效果不理想的问题，分析了该区油气成藏的影响因素和富集规律。结果表明，该区大型古隆起的继承性发育、区域性油气运移和圈闭形成时间早晚的匹配、石炭系储层的发育程度和上覆地层异常高压的存在、有效供气面积的大小，以及断裂的封堵性和渗入水的强度等，是影响油气聚集和保存的主要因素。认为该区石炭系的油气勘探，应以开江－梁平古隆起南缘和石柱古隆起为重点。

The factors affecting the hydrocarbon reservoir formation and its enrichment regularity in Carboniferous in western Hubei and eastern Chongqing

The area of western Hubei and eastern Chongqing which is on the same structural belt of Chuandong is continual part of high product ion and enrichment zone of natural gas in the upper Paleozoic in Chuandong.But drilling effects have been poor in recent years in the area, the main reasons are lack of understanding the factors affecting hydrocarbon reservoir formation and its enrichment regularity.It should be pointed out that the main factors which influence oil-gas accumulation and preservation are the successive development of large polaeohighs,the consistency of the times of the regional hydrocarbon migration and trap formation,the development degree of Carboniferous reservoirs,the existence of anomaly high pressure in overlying strata,the scale of effective hydrocarbon supply area, the fault sealing degree and the amount and seeping depth of seepage water and so on.It is suggested that we should take the southern margin of Kaijiang-Liangping polaeohigh and Sizhu polaeohigh as the important area in the oil-gas exploration in carboniferous.