收稿日期: 2003-12-29
修回日期: 2004-02-16
网络出版日期: 2004-04-20
THE GEOCHEMICAL CHARACTERISTICS AND ORIGI N OF NATURAL GAS AND CONDENSATES IN YANCHENG SAG, SUBEI BASIN
Received date: 2003-12-29
Revised date: 2004-02-16
Online published: 2004-04-20
包建平,毛凤鸣,段云鹏,马安来,朱翠山,侯建国,王文军 . 苏北盆地盐城凹陷天然气和凝析油的地球化学特征和成因[J]. 天然气地球科学, 2004 , 15(2) : 103 -109 . DOI: 10.11764/j.issn.1672-1926.2004.02.103
Based on the chemical compositions and steady carbon isoto pe of natural gases from Taizhou formation in Yancheng sag, Subei basin, and com bined with the results of carbon isotope of gases from the thermal simulation of K2t and Ef2 source rocks with different organic matter type s, the natural gases are dry gas derived from thermal cracking of type-Ⅲ kerogen. They are mainly generated from the underlying upper Paleozoic source rocks .The condensates accompanying with dry gases are primarily derived from K2t source rocks. The formation of condensates is related to gas washi ng which results in the fractionation of crude oils in upper oil reservoirs.
Key words: Yancheng sag; Natural gas; Condensates; Carbon isotope; Gas washing; Maturity.
[1 ] 丁道桂,李萍,吕俊祥.下扬子地区晚古生代含油气盆地原型[J].石油实验地质,1987,9(3):272-281.
[2 ] 陈焕疆,邱之俊.中扬子区与下扬子区油气地质条件的对比分析[J ].石油实验地质,1988,10(4):305-313.
[3 ] 费富安,罗继坤,李丽娜,等.苏北地区天然气地球化学特征及成因A.中国科学院兰州地质研究所生物、气体地球化学开放研究室研究年报1988-1989 [C ].北京 :科学出版社,199063-81.
[4 ] 包建平,王铁冠,王金渝.下扬子地区海相中、古生界有机地球化学 [M ].重庆:重庆大学出版社,199685-108.
[5 ] Mango F D.An invariance in the isoheptanes of petroleum[J ]. Science,1987,237:514-517.
[6 ] Mango F D.The origin of light hydracarbons in petrole um:Akinetic test of the steady state catalytic hypothesis[J ].Geochem. CosmochimActa .,1990,54:1315-1323.
[7 ] Mango F D.The origin of light hydracarbons in petroleum: Ring pref erence in the closure of carbocyclic rings [J ] GeochemCosmochimActa,19 94,58:895-901.
[8 ] 冯福,王廷斌,张士亚,等.中国天然气地质 [M ].北京:地质出版社, 1995,113-164
[9 ] 刘文汇,刘全有,徐永昌,等.天然气地球化学数据的获取及应用 [J ].天然气地球科学,2003,14(1):21-29.
[10 ] 戴金星.加强天然气地学研究勘探更多大气田 [J ].天然气地球科学,2003,14 (1):3-14.
[11 ] Stahl W J.Carbon and nitrogen isotopes in hydracarbon research and exploration [J ].Chemical Geology, 1997,20(1): 120-149.
[12 ] 戴金星.天然气碳氢同位素特征和各类天然气的鉴别 [J ].天然气地球科学,199 3,2(3):1-40.
[13 ] 徐永昌.天然气地球化学研究及有关问题探讨 [J ].天然气地球科学,1999,10( 3-4):20-28.
[14 ] 沈平.天然气地球化学研究中的新认识和新发展 [J ].天然气地球科学,19901 :37-40.
[15 ] 祝厚勤,刘平兰.盐城凹陷朱家墩泰州组气藏形成机理研究 [J ].天然气地球科 学,2003,14(3):220-223
[16 ] Prinzhofer A A, Huc A YGenetic and post-genetic molecular and isotopic fractionations in natural gases [J ].Chemical Geology,1995,126(2 ):281-290.
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