CAJ | 학술논문

系统分析了辽中凹陷烃源岩的地球化学特征,并对烃源岩进行了综合评价,以期为辽中凹陷油气资源评价及战略选区提供科学依据。分析结果表明：沙一段有机质丰度为1.997%,有机质类型为Ⅱ1,具最高生产力,但因沉积厚度较薄,生烃量有限,不属于主力烃源岩;沙三段有机质丰度为1.64%,有机质类型以Ⅱ1为主,处于成熟—高成熟阶段;东三段有机质丰度为1.715%,有机质类型以Ⅱ1～Ⅱ2为主,处于成熟阶段。证实沙三段、东三段为辽中凹陷的优质烃源岩,目前没有大量发现优质烃源岩的原因是现在钻遇优质烃源岩的井不多或没有系统采样所致。
계통분석료료중요함경원암적지구화학특정,병대경원암진행료종합평개,이기위료중요함유기자원평개급전략선구제공과학의거。분석결과표명：사일단유궤질봉도위1.997%,유궤질류형위Ⅱ1,구최고생산력,단인침적후도교박,생경량유한,불속우주력경원암;사삼단유궤질봉도위1.64%,유궤질류형이Ⅱ1위주,처우성숙—고성숙계단;동삼단유궤질봉도위1.715%,유궤질류형이Ⅱ1～Ⅱ2위주,처우성숙계단。증실사삼단、동삼단위료중요함적우질경원암,목전몰유대량발현우질경원암적원인시현재찬우우질경원암적정불다혹몰유계통채양소치。
The geochemical characteristics analysis of hydrocarbon source rock is expected to help evaluate the resources in Liaozhong sag paleogene. The results show that： the organic matter abundance of Esl is 1.997% and the type of organic matter isⅡ 1 with maximum pro- ductivity, but low in hydrocarbon generation and weak in the deposition thickness of Esl, thus not belonging to chief source rock; the or- ganic matter abundance of Es3 is 1.64%, and the type of organic matte isⅡ1, which is in a mature- high- mature stage; the organic matter abundance of Ed3 is 1.715%, and its type is Ⅱ 1 ~Ⅱ 2, which is in the mature stage. It is confirmed that Es3 and Ed3 are good hydrocarbon source rock of Liaozhong sag. And its failure in numerous exploitation of good hydrocarbon source rock is due to inadequate well and non- systematic sampling.