CAJ | 학술논문

四川盆地阆中-南部地区上三叠统须家河组油气勘探一直未能取得突破,前期研究认为是由于缺乏丰富的马鞍塘组、小塘子组优质烃源岩所致.结合区域沉积环境,从烃源岩发育情况、储层发育情况、油气运移通道以及油气藏保存情况等几个方面入手,对该区须家河组油气勘探潜力进行了分析.结合邻区广安气田的勘探成果.研究指出:尽管阆中-南部地区马鞍塘组、小塘子组缺乏有效的烃源岩,但须家河组烃源岩仍具有一定的生烃潜力;须家河组三段具有一定的生烃条件,须家河组五段具有较好的生烃条件;油气运移条件分析表明.天宫院、金星场和石龙2井等部位处于油气运移的有利通道上,有利于油气的聚集成藏;从油气成藏条件的配置情况来看,须四段是该区须家河组取得油气重大突破的主力层段.
사천분지랑중-남부지구상삼첩통수가하조유기감탐일직미능취득돌파,전기연구인위시유우결핍봉부적마안당조、소당자조우질경원암소치.결합구역침적배경,종경원암발육정황、저층발육정황、유기운이통도이급유기장보존정황등궤개방면입수,대해구수가하조유기감탐잠력진행료분석.결합린구엄안기전적감탐성과.연구지출:진관랑중-남부지구마안당조、소당자조결핍유효적경원암,단수가하조경원암잉구유일정적생경잠력;수가하조삼단구유일정적생경조건,수가하조오단구유교호적생경조건;유기운이조건분석표명.천궁원、금성장화석룡2정등부위처우유기운이적유리통도상,유리우유기적취집성장;종유기성장조건적배치정황래간,수사단시해구수가하조취득유기중대돌파적주력층단.
No breakthroughs have been made in the exploration of the Xujiahe Formation in the Langzhong - Nanbu area, Sichuan Basin. The previous studies have attributed this to the lack of high quality source rocks in the Ma'antang and Xiaotangzi formations in the study area. The exploration potential of the Xujiahe Formation in the study area is comprehensively analyzed in respect of regional sedimentary setting, source rocks, reservoirs, hydrocarbon migration and preservation. According to the experiences of exploration in the adjacent Guang'an gas field, it is believed that the Xujiahe Formation still has certain hydrocarbon generation potential,thanks to the source rocks in its third and fifth members, although effective source rocks are absent in the Ma'antang and Xiaotangzi formations in the study area. The Tiangongyuan, Jinxingchang and Shilong-2 wellblocks are located in the pathway of hydrocarbon migration, thus are favorable for hydrocarbon accumulation. The timing of the hydrocarbon pooling conditions reveals that the fourth member of the Xujiahe Formation will be the major exploration target for a breakthrough.