CAJ | 학술논문

四川盆地东部石炭系经过30多年以构造圈闭为目的的天然气勘探与开发,已经成为了四川盆地重要的产气层系.近来以岩性地层气藏为目标进行了新一轮的地层、沉积微相、储层、烃源岩、构造、成藏与圈闭等方面的研究,结果表明川东石炭系发育构造与岩性地层两类目标.石炭系内幕因粒屑滩微相控制与埋藏白云化不均一影响,储层具有不连续性,存在岩性圈闭;石炭系大范围尖灭与大面积残留,在尖灭带与残留区发育大型地层圈闭.川东石炭系具备岩性地层气藏形成条件,目前发现4个有利区带和12个有利目标,展示其具有较大的勘探潜力.
사천분지동부석탄계경과30다년이구조권폐위목적적천연기감탐여개발,이경성위료사천분지중요적산기층계.근래이암성지층기장위목표진행료신일륜적지층、침적미상、저층、경원암、구조、성장여권폐등방면적연구,결과표명천동석탄계발육구조여암성지층량류목표.석탄계내막인립설탄미상공제여매장백운화불균일영향,저층구유불련속성,존재암성권폐;석탄계대범위첨멸여대면적잔류,재첨멸대여잔류구발육대형지층권폐.천동석탄계구비암성지층기장형성조건,목전발현4개유리구대화12개유리목표,전시기구유교대적감탐잠력.
The Carboniferous reservoir has become the main gas producing formation in Sichuan Basin through more than 30 years of exploration and development. Recently, the new round study on stratigraphy, sedimentary facies, reservoir, source rock, structure, accumulation and trap in the eastern Sichuan Basin indicated that there are two kinds of exploration targets. One is lithologic trap, which is under the control of grain-clastic bank and heterogeneous burial dolomization in inner Carboniferous, and it shows the characteristics of heterogeneous reservoir. The other is large stratigraphic trap, which can be formed in Carboniferous wedge out area. So the Carboniferous reservoir in the Sichuan Basin has the formation condition of lithologic and stratigraphic gas pools,and 4 favorable regions and 12 prospective targets have been found, which reveals the great exploration potential.