中国石油大学学报（自然科学版）2017，Vol.41Issue(3)：42-48,7.DOI:10.3969/j.issn.1673-5005.2017.03.005
东濮凹陷北部地区古近系油型气成因类型及分布特征
Genesis and distribution of Paleogene oil type gases in the northern Dongpu Depression
摘要
Abstract
Based on pressure-thermal experiments of kerogen degrading/cracking and oil cracking with source rocks and oil samples of Dongpu Depression,the componential differences between kerogen-degraded/cracked gas and oil-cracked gas were identified,and a genesis identification chart to distinguish the two different types of gas was generated.Using this chart,and combining the data of natural gas component and carbon isotope in the northern Dongpu Depression,the genesis of the oiltype gas in the study area was studied,and the distribution characteristics of these two types were discussed.The oil type gas found in Paleogene of the northern Dongpu Depression can be clearly identified with two origins,kerogen-degraded/cracked origin and oil-cracked origin.The kerogen-degraded/cracked gas has relative high value of C1/C2 and low value of C2/C3;while the oil-cracked gas has relative low value of C1/C2 but high value of C2/C3.There are significant differences in the distribution of the two types of gas in the northern Dongpu Depression,the kerogen-degraded/cracked gas occur more widely than oil-cracked gases in depression,while the latter is found near sag center.The distribution differences between kerogendegraded/cracked gas and oil-cracked gas are related to their generation and accumulation condition differences.In terms of the oil type gas identification and their distribution,a conclusion is made that there are favorable formation conditions for the gas types in deep and central sag area,suggesting that there are good oil type gas potentials for exploration in the deep and central sag in the northern Dongpu Depression.关键词
天然气/成因类型/干酪根热解气/干酪根裂解气/原油裂解气/古近系/东濮凹陷Key words
natural gas/genetic type/kerogen-degraded gas/kerogen-cracked gas/oil-cracked gas/Paleogene/Dongpu Depression分类
能源科技引用本文复制引用
蒋有录,胡洪瑾,谈玉明,刘景东,赵利杰..东濮凹陷北部地区古近系油型气成因类型及分布特征[J].中国石油大学学报（自然科学版）,2017,41(3):42-48,7.基金项目
国家油气重大专项课题(2011ZX05006-004) （2011ZX05006-004）
