Condensate pools with reservoir ages of Ordovician, Permian, Triassic, Jurassic, Cretaceous, Eogene, and Neogene were found in every giant petroliferous Basin in China. Condensates generated by sapropelic organic matters (sapropelic condensates) are of high- to over-mature stages, while the maturities of those generated by humic organic matters (humic condensates) cover a wide range, from early mature to over-mature. Carbon isotopes of 143 condensate samples were analyzed in this work, and we found that both the organic matter type and the maturity significantly influenced the isotopic composition of the condensates. The total hydrocarbon isotopic values of the humic condensates range from −29.9% to −21.7%, with an average of −26.0% (94 samples), while those sapropelic condensates are lighter generally, covering a range of −33.9% to −26.0% with an average of −29.5% (40 samples). δ13Caromatics value is strongly inheritable to the organic matter type and it combined with the δ13Csaturates value can be used to distinguish condensates of different types. δ13Caromatics value of sapropelic condensate is less than −27.5%, while the δ13Caromatics and the δ13Csaturates values of humic condensate are larger than −27.5% and −29.5%, respectively.
ArouriK.R.JendenP.D. and Al-HajjiA.A., 2010. Petroleum inclusion atop Unayzah gas condensate reservoir: Signpost for an undocumented chapter of the Arabian Basin filling history?Organic Geochemistry42, 698–705.
2.
BechtelA.SunY.Z.PüttmannW.HoernesS. and HoefsJ., 2001. Isotopic evidence for multi-stage base metal enrichment in the Kupferschiefer from the Sangerhausen Basin, Germany. Chemical Geology176, 31–49.
3.
CurialeJ.A. and BromleyB.W., 1996. Migration induced compositional changes in oils and condensates of a single field. Organic Geochemistry, 24(12), 1097–1113.
4.
CarriganW.J.JonesP.J.TobeyM.H.HalpernH.I.WenderL.E.PhilpR.P. and AllenJ., 1998. Geochemical variations among Eastern Saudi Arabian Paleozoic condensate related to different source kitchen areas. Organic Geochemistry29(1–3), 785–798.
5.
ChengK.M.JinW.M.HeJ.H.ChenJ.P. and YangZ.F., 1987. Composition characteristics of light hydrocarbons in continental oil and condensate and their geological significance. Petroleum Exploration & Development14(1), 34–43.
6.
ChenJ.F.ShenP. and WenQ.B., 1995. The Genetic type and geochemical characters and their signification of the condensates in China. Acta Sedimentologica Sinica13(2), 32–40 (in Chinese with English abstract).
7.
ChenQ.LiW.H.HaoS.L.LiuZ. and XuJ., 2011. Carbon isotope evidence for Ordovician marine hydrocarbon source rocks in Ordos Basin, North China. Energy Exploration & Exploitation29(3), 267–288.
8.
DzouP.I.L. and HughesW.B., 1993. Geochemistry of oils and condensates, K field offshore Taiwan: A case study in migration fraction. Organic Geochemistry20, 437–462.
9.
DaiJ.X. and SongY., 1987. Identification indexes coal-formed gas. in: Geological Research of Coal-Formed Gas. Petroleum Industry Press, Beijing, China, pp. 156–170 (in Chinese).
10.
DaiJ.X.PeiX.G. and QiH.F., 1992. China Nature Gas Geology (Vol.1). Petroleum Industry Press, Beijing, China, pp. 75–84 (in Chinese).
11.
DaiJ.X.SongY. and SunY.X., 1993. Coal-Formed gas in Turpan-Hami Basin. Petroleum Exploration & Development20(2), 6–10 (in Chinese with English abstract).
12.
DaiJ.X.WangT.B.SongY.ZhangH.N.XuY.C. and ZhangQ.M., 1997. Formation conditions and distribution of middle – giant natural gas fields in China. Geological Publishing House, Beijing, China, pp. 1–300 (in Chinese).
13.
DaiJ.X.QiH.F.WangS.C.SongY.GuanD.S. and GuanX.H.Z., 2001. Gas and Oil Geochemical Characteristics of Coal Measures and Formation Conditions and Resource Evaluation of Coal-Formed Gas Pools in China. Petroleum Industry Press, Beijing, China, pp. 1–158 (in Chinese).
14.
DaiJ.X.ZhongN.N.ChenJ.F.PangX.Q. and QinS.F., 2003. China Giant Natural Gas Fields and Its Sources. Science Press, Beijing, China, pp. 1–199 (in Chinese).
15.
DaiJ.X.ZouC.N.LiJ.NiY.Y.HuG.Y.ZhangX.B.LiuQ.Y.YangC. and HuA.P., 2009. Carbon isotopes of Middle-Lower Jurassic coal-derived alkane gases from the major basins of Northwestern China. International Journal of Coal Geology80, 124–134.
16.
FuJ.M.LiuD.H. and ShengG.Y., 1990. Geochemistry of Coal-Formed Hydrocarbon. Science Press, Beijing, China, pp. 89–113 (in Chinese).
17.
GeorgeS.C.LiskM. and EadingtonP.J., 2004. Fluid inclusion evidence for an early, marine-sourced oil charge prior to gas-condensate migration, Bayu-1, Timor Sea, Australia. Marine and Petroleum Geology21, 1107–1128.
18.
KadirGürgeyPhilpR. P.ChrisClaytonEmirogluH. and SiyakoM., 2005. Geochemical and isotopic approach to maturity/source/mixing estimations for natural gas and associated condensates in the Thrace Basin, NW Turkey. Applied Geochemistry20, 2017–2037.
19.
GaoB.LiuW.H.ZhangD.W. and FanM., 2008. Geochemical characteristics of hydrocarbon in Yakela gas condensate Field, Tarim Basin. Marine Origin Petroleum Geology13(3), 49–54 (in Chinese with English abstract).
20.
HuangR.C., 1997. Formation and Distribution Regularities of Immature Oil and Condensate Pools in China. Petroleum Industry Press, Beijing, China, pp. 1–7 (in Chinese).
21.
JustwanH.DahlB. and IsaksenG.H., 2006. Geochemical characterisation and genetic origin of oils and condensates in the South Viking Graben, Norway, Marine and Petroleum Geology23, 213–239.
22.
JiangP., 2001. Condensate reservoir formation in Qianmiqiao Buried Hill Structure. Natural Gas Industry21(4), 39–42 (in Chinese with English abstract).
23.
LuH.WangT.G.WangC.J.ZhuD. and ZhuL., 2001. Hydrocarbon source of high waxy condensate oil and gas pools in Qianmiqiao Buried-Hill Zone of Huanghua Depression. Petroleum Exploration & Development28(4), 17–21 (in Chinese with English abstract).
24.
SnowdonL.R. and PoWellT.G., 1982. Immature oil and condensate-modification of hydrocarbon generation model for terrestrial organic matter. AAPG Bulletin66(6), 775–788.
25.
SharafL.M., 2003. Source rock ecalustion and geochemistry of condensates and natural gases, offshore Nile delta, Egypt, Journal of Petroleum Geology26(2), 189–209.
26.
ShenP.XuY.C.WangX.B.LiuD.H.ShenQ.X. and LiuW.H., 1991. Geochemical Characteristics of Source and Natural Gas and Gas Formation Mechanisms. Gansu Science and Technology Press, Lanzhou, China, pp. 1–248 (in Chinese).
27.
TissotB.P. and WelteD.H., 1978. Petroleum Formation and Occurrence – A New Approach to Oil and Gas Exploration, Spring-Verlag, Beilin, Heidelberg, New York, Tokyo, pp. 1–538.
28.
ThompsonK.F.M., 1987. Fractionated aromatic petroleum and generation of gas-condensates. Organic Geochemistry11, 237–246.
29.
WangT.D.LiS.J. and HanY.W., 1989. Formation Mechanism and Distribution Characteristic of Typical Condensate Pools in China, Southwest Petroleum University Press, Chengdu, China, pp. 1–212 (in Chinese).
30.
WangS.Y. and WangT.D., 1990. Geochemical characters of condensates in Sichuan Basin. Oil & Gas Geology11(4), 454–461 (in Chinese with English abstract).
31.
WangC.G.ChengK.M. and XuY.C., 1998. Geochemistry of Jurrasic Coal-Formed Hydrocarbons in Turpan-Hami Basin. Science Press, Beijing, China, pp. 1–342 (in Chinese).
32.
XuY.C., 1994. Natural Gas Formation Theory and Application. Science Press, Beijing, China, pp. 223–255 (in Chinese).
33.
YuanF.X. and SunY.G., 2007. Carbon isotopic geochemistry of crude oil from Yingjisu Sag in Tarim Basin and its implication. Xinjiang Petroleum Geology28(3), 324–326 (in Chinese with English abstract).
34.
ZhangH.F. and ZhangW.X., 1999. Petroleum Geology (The Second Edition). Petroleum Industry Press, Beijing, China, pp. 1–220 (in Chinese).
35.
ZhangS.C., 2000. Migration Fractionation – An important formation mechanism of condensate and waxy oil. Chinese Science Bulletin45(6), 667–670 (in Chinese).
36.
ZhangS.C.ZhaoW.Z.WangF.Y.ChenJ.P.XiaoZ.Y.ZhongN.N. and SongQ.F., 2004. Paleozoic oil cracking gas accumulation history from eastern part of The Tarim Basin – A Case study of The YN2 gas reservoir. Natural Gas Geoscience15(5), 441–451 (in Chinese with English abstract).
37.
ZhangY.X.ShenZ.M.WangY. and LiuH.Y., 2007. GCMS Analysis of Mature Condensate Oil and Its Application in Petroleum Geology. Petroleum Geology & Experiment29(5), 516–521 (in Chinese with English abstract).
