摘要
油气是由烃源岩中的有机质生成的,因此有机质的丰度、类型及成熟度决定了生烃的潜力。辽中凹陷是辽东湾地区生烃潜力最大的凹陷,具有很大的油气开采价值。通过有机质的含量、热解、镜检及镜质体反射率等方法来评价辽中凹陷烃源岩的基本地化特征。研究结果表明:沙一段、沙三段和东三段这3套地层中好—最好的烃源岩占到了岩样总数的70%,有机质类型主要发育为Ⅱ1和Ⅱ2型,生烃门限在2 500 m左右深处。
Oil and gas are generated from organic matter in source rock.Therefore,organic-matter abundance,type and maturity can determine hydrocarbon-generating potential.With the biggest potential in Liaodong Bay,the Liaozhong Depression is rich enough to be commercially exploited.For source rock in this depression,its geochemical characteristics are evaluated by some analysis,including organic-matter content,pyrolysis,microscopy,and vitrinite reflection ratio.Results show that(1)there are three suites of formation from moderate to good,including Sha 1,Sha 3 and Dong 3 members(;2)the best source rock accounts for 70 % of total rock samples(;3)the main organic-matter types contain II1 and II2;and(4)hydrocarbon-generating threshold is about 2500 m of burial depth.
出处
《天然气技术与经济》
2013年第4期18-21,77,共4页
Natural Gas Technology and Economy
基金
十二五国家重大专项"辽中凹陷油气成藏规律及勘探方向研究"(编号:2011ZX05023-001-014)资助
关键词
辽中凹陷
有机质
烃源岩
生烃潜力
Liaozhong Depression,organic matter,source rock,hydrocarbon-generating potential
作者简介
范厚江（1988－），硕士研究生，研究方向为烃源岩评价与成藏动力学。E-mail：fanhoujiang@126.com
