东濮凹陷不同环境烃源岩评价及生排烃特征研究

Evaluation on hydrocarbon source rocks in different environments and characteristics of hydrocarbon generation and expulsion in Dongpu Depression

陈洁¹ 鹿坤¹ 冯英¹ 苑克红¹ 王德波¹ 崔红² 张文洁²

中国石化中原油田分公司勘探开发科学研究院，河南 濮阳457001 中国石化中原石油勘探局对外经济贸易总公司，河南 濮阳 457001

Research Institute of Exploration and Development, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China ZPEB International, SINOPEC, Puyang 457001, China

东濮凹陷不同环境烃源岩生烃潜力差别巨大，文中对不同环境烃源岩有机地球化学特征和生排烃特征进行了研究。研究结果表明：东濮北部咸水环境烃源岩为好—优质烃源岩，北部半咸水环境烃源岩为中等—好烃源岩，南部淡水—微咸水环境烃源岩最差，为差—中等烃源岩。不同环境烃源岩均有2次生烃和2次排烃，第一期生烃为镜质体反射率R_o小于0.7%，该期主要是可溶有机质直接转化成未熟或者低熟油，第二期为R_o大于0.7%，主要以干酪根热降解生成成熟油为主。东濮凹陷不同环境烃源岩评价及生排烃特征的研究，对东濮凹陷下一步勘探具有指导意义。

In different environments, the potential of hydrocarbon source rocks has a significant difference in Dongpu Depression. By studying the organic geochemistry of source rocks and the characteristics of hydrocarbon generation and expulsion in different environments, it is shown that the source rocks in the northern salt water environment are good to excellent, the source rocks in northern brackish environment are medium to good and the source rocks in southern fresh water-brackish water environment are poor to medium．Source rocks in different environments have twice hydrocarbon generations and expulsions．The first phase is Ro <0.7%, in which the soluble organic matters directly convert into immature or low mature oil. The second phase is Ro> 0.7%, in which the thermal degradation of kerogen mainly generates mature oil．The evaluation on source rocks in different environments and the characteristics study of hydrocarbon generation and expulsion can provide an instructive role for the next step exploration in Dongpu Depression．

10.6056/dkyqt201201008