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引用本文:刘景东1,2,3 蒋有录3. 东濮凹陷北部地区古近系烃源岩热演化特征及其主控因素[J]. 中国地质, 2013, 40(2): 498-507.
LIU Jing-dong1,2,3, JIANG You-lu3. Thermal evolution characteristics of Paleogene source rocks and their main controlling factors in northern part of Dongpu depression[J]. Geology in China, 2013, 40(2): 498-507(in Chinese with English abstract).
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东濮凹陷北部地区古近系烃源岩热演化特征及其主控因素
刘景东1,2,3 蒋有录31,2,3
1.南京大学地球科学系,江苏 南京210093;2.中国石化石油勘探开发研究院无锡石油地质研究所,江苏 无锡,214126;3.中国石油大学地球科学与技术学院,山东 青岛,266555
摘要:
提要:依据可溶有机质、生物标志化合物和镜质体反射率资料,结合EASY% Ro法数值模拟,综合分析了东濮凹陷北部地区不同洼陷古近系烃源岩的热演化特征及其差异性的主控因素。结果表明,前梨园洼陷和海通集洼陷进入高、过成熟阶段,濮卫次洼进入成熟阶段,前梨园洼陷和濮卫次洼相对海通集洼陷具有较宽的生烃窗范围,对应的生烃门限深度较浅,而高成熟门限深度较深。沙三段为各洼陷主力生烃层系,东营沉积末期为主要生烃期,明化镇期—现今出现二次生烃。烃源岩热演化差异的主控因素为地温,其次为异常高压,有机质类型影响较小。
关键词:  烃源岩  热演化  主控因素  古近系  东濮凹陷
DOI:
分类号:
基金项目:国家科技重大专项“大型油气田及煤层气开发”(2011ZX05005-001)资助。
Thermal evolution characteristics of Paleogene source rocks and their main controlling factors in northern part of Dongpu depression
LIU Jing-dong1,2,3, JIANG You-lu31,2,3
1. Department of Earth Science, Nanjing University, Nanjing 210093, Jiangsu, China;2. Wuxi Research Institute of Petroleum Geology, Research Institute of Petroleum Exploration and Production,SINOPEC, Wuxi 214151, Jiangsu, China;3. School of Geosciences, China University of Petroleum, Qingdao 266555, Shandong, China
Abstract:
Abstract:Based on the soluble organic matters, biomarkers and vitrinite reflectances, this paper analyzed comprehensively thermal evolution characteristics of Paleogene source rocks and their main controlling factors in different subsags within the northern part of Dongpu depression. The results show that Paleogene source rocks of both Qianliyuan and Haitongji sags have developed into high and over-mature stages, while Paleogene source rocks of Puwei subsag only belong to the mature stage. Compared with Haitongji sag, Qianliyuan sag and Puwei subsag have wider range of hydrocarbon generation in the?longitudinal direction, shallower threshold depth for hydrocarbon generation, and deeper threshold depth for high maturity. Sha-3 member is the major source rock in all subsags, the main stage of hydrocarbon generation is Dongying period, and there existed secondary hydrocarbon generation since Minghuazhen period. The?main factor controlling Paleogene source rocks’ thermal evolution differences among different subsags is formation temperature, followed by abnormal high pressure, and the type of organic matter has no obvious effect.
Key words:  source rocks  thermal evolution history  main controlling factor  Paleogene  Dongpu depression