SOME NEW UNDERSTANDING OF FORMATION OF YA 13-1 GAS FIELD
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摘要: 崖13-1气田自发现以来,仅烃源就有煤气说、高压气包说和双源说.如果把烃源岩的生烃过程与地质构造发育史结合起来分析的话,就会发现上述各说只分别论述了该气田形成的部分问题,其实该气田有复杂的形成过程.经归纳共有4期:崖城组烃源岩形成期,油藏形成期,梅山组烃源岩形成期,热气注入油藏转为气藏期.据此,莺歌海盆地以含气为主,而琼东南盆地应以含油为主.Abstract: There have been various hypothesis about the formation of Ya 13-1 gas field since it was discovered.If the process of hydrocarbon generation is combined with the development of geological structure,it will be clear that formation of the field is very complicated.There were 4 stages for formation of the field:(1) deposition of source rocks of Yacheng formation;(2) formation of oil pool;(3) deposition of source rocks of Meishan formation;and (4) oil pool became gas pool as a result of charging of hot gas.It is considered that the Yinggehai basin is dominated by gas pools and the Qiongdongnan Basin by oil pools.
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