CAJ | 학술논문

川东南的构造演化可分成5个阶段:①晚震旦世抬升剥蚀阶段;②早古生代沉降阶段;③晚志留世-泥盆、石炭纪抬升剥蚀阶段;④二叠纪-晚白垩世沉降阶段;⑤晚白垩世-现今快速隆升阶段.震旦系灯影组-下古生界储层沥青与下寒武统和下志留统黑色泥岩之间地球化学特征的对比表明二者有着重要的联系,灯影组烃源来自下寒武统牛蹄塘组.丁山构造一直处于高部位,有利于油气聚集,丁山构造在晚白垩世前圈闭、封盖、储层及保存条件均较好,形成了古油藏.随着埋深的增大,古油藏裂解成古气藏.晚白垩世至今受喜马拉雅运动的影响,通天断层发育,保存条件变差,导致天然气的逸散.丁山构造的油气成藏过程可分为古油藏→古油藏裂解形成古气藏→古气藏破坏三大过程.
천동남적구조연화가분성5개계단:①만진단세태승박식계단;②조고생대침강계단;③만지류세-니분、석탄기태승박식계단;④이첩기-만백성세침강계단;⑤만백성세-현금쾌속륭승계단.진단계등영조-하고생계저층력청여하한무통화하지류통흑색니암지간지구화학특정적대비표명이자유착중요적련계,등영조경원래자하한무통우제당조.정산구조일직처우고부위,유리우유기취집,정산구조재만백성세전권폐、봉개、저층급보존조건균교호,형성료고유장.수착매심적증대,고유장렬해성고기장.만백성세지금수희마랍아운동적영향,통천단층발육,보존조건변차,도치천연기적일산.정산구조적유기성장과정가분위고유장→고유장렬해형성고기장→고기장파배삼대과정.
Tectonic evolution of southeast Sichuan Basin can be divided into five stages :① the uplift and erosion in Late Sinian; ② the subsidence in Early Paleozoic; ③the uplift and erosion stage in Late Silurian to Carboniferous;④ the subsidence in Permian to Late Cretaceous; and ⑤ the rapid uplift from Late Cretaceous to now. The geochemical comparison between the Asphalt in Dengying Formation-Late Paleozoic of reservoir and the black shale in Lower Cambrian and the Silurian indicates that they have important links. The source rocks in Dengying Formation originate from Niutitang Formation in Lower Cambrian. With a high position, Dingshan structure has the advantage of oil and gas accumulation. It had good trap,capping, reservoir, storage conditions before Late Cretaceous. It formed plaeo-oil reservoir. With the increase in buried depth, the oil thermal cracked to gas. The holding condition is destroyed by Himalayan movement from Late Cretaceous to now. The fault leading to the surface causes the effusion of the gas . The petroleum formed process is paleo-oil reservoir→paleo-gas reservoir→paleo-gas reservoir destroyed.