石油实验地质2017，Vol.39Issue(5)：640-646,7.DOI:10.11781/sysydz201705640
下扬子句容地区上古生界油气成藏模式及控制因素
Hydrocarbon accumulation model and controlling factors in the Upper Paleozoic in Jurong area, Lower Yangtze region
摘要
Abstract
The main controlling factors of a hydrocarbon accumulation model of the upper Paleozoic in the Jurong area of the Lower Yangtze region were discussed. Regional geology and hydrocarbon accumulation processes in some key exploration wells were studied using the relationship between oil and gas accumulation elements and the spatial?temporal distribution of the marine strata in the Upper Paleozoic in the study area. The results showed that:(1) The Upper Paleozoic Longtan and Qinglong formations provided source rocks, carbonate fractures on the Indosinian unconformity surface and the tight sandstones in the Longtan Formation worked as reservoirs, and the shale in the Gecun and Pukou formations functioned as cap rocks. The tectonic and accumulation histories obtained from typical exploration wells indicated that traps were formed and adjusted continuously due to multiple tectonic activities. The tectonic uplift during the late Himalayan period destroyed hydrocarbon reservoirs, leading to a great loss of oil and gas in Jurong area. (2) Three classes of oil and gas reservoirs developed, including the secondary residual, primary preservation and the late reconstruction types. Preservation conditions for oil and gas were the key factors for hydrocarbon accumulation in Jurong area. The Qinglong Formation experienced erosion and leaching during the Indosinian and Yanshanian periods, forming a large number of caves and cracks, which controlled the late reconstruction of fractured?vuggy carbonate reservoirs on the unconformity surface.关键词
油气成藏模式/油藏控制因素/上古生界/句容地区/下扬子区Key words
hydrocarbon accumulation model/reservoir controlling factor/Upper Paleozoic/Jurong area/Lower Yangtze region分类
能源科技引用本文复制引用
王东燕,彭金宁,邱岐,吕俊祥..下扬子句容地区上古生界油气成藏模式及控制因素[J].石油实验地质,2017,39(5):640-646,7.基金项目
国家科技重大专项(2016ZX05002-06,2017ZX05005-003-02)、中国石化科技开发部项目(P13092)和中国石化油田事业部项目(G5800-12-ZS-YTB64)联合资助. （2016ZX05002-06,2017ZX05005-003-02）
