Sage Journals: Discover world-class research

Abstract

To study the distribution relationship between salt rocks and oil-and-gas in Mizhi region of the Ordos Basin, a detailed research was conducted to assess the organic geochemical characteristics of the source rocks. The results show that the Pr/Ph (pristane/phytane) ratios are higher than 1 and that the content of chloroform bitumen “A” is lower in the Triassic and highest in the Carboniferous strata. From the Triassic to the Ordovician, the maturity is increased but the ratio of aliphatic to aromatic hydrocarbons is decreased with the depth, which is possibly related to the high salinity levels in the region. Long-chain n-alkanes are absent in the Carboniferous, whereas they are observed in the Ordovician. The aromatic chromatograms show that the naphthalene content increases with depth and is consistant with maturity. β-carotene and dehydrovitamin E were detected, which may indicate the presence of marine and reducing environments. The Triassic, Permian and Carboniferous sediments can be classified as source rocks.

Keywords

Source rocks Organic geochemistry Salt rock Mizhi region Ordos Basin

Get full access to this article

View all access options for this article.

References

Chen

W.H.

Hao

S.L.

Liu

and Xu

, 2011. Carbon isotope evidence for Ordovician marine hydrocarbon source rocks in Ordos Basin, North China. Energy Exploration and Exploitation 29(3), 267–288.

Cong

L.L.

and Wen

, 2010. Accumulation mechanism and distributing regulation of petroleum, natural gas, coal in Ordos Basin. Geoscience 29, 7123–7129.

Ding

W.L.

Wan

and He

Z.H.

, 2011. Characteristics of Triassic marine source rocks and prediction of favorable source kitchens in Qiangtang Basin, Tibet. Energy Exploration and Exploitation 29(2), 143–160.

Huang

S.P.

Liao

F.R.

and Wu

X.Q.

, 2010. Geochemical characteristics of Carboniferous-Permian coal-formed gas in Bohai Bay Basin. Energy Exploration and Exploitation 28(1), 13–24.

Jackson

M.P.A.

Roberts

D.G.

Snelsons , 1995. SaltTectonics: A Global Perspective. AAPG Memoir 65, 1–28.

Jiang

J.G.

Peng

P.A.

J.M.

and Sheng

G.Y.

, 2004. The formation, evolution and aggregation of salt lake hydrocarbon. Guangdong Science and Technology Press, Guangzhou, pp. 216.

S.Y.

Lin

S.J.

Guo

S.H.

and Liu

L.F.

, 2002. Effects of inorganic salts on the hydrocarbon generation from kerogens. Geochimica 31(1), 15–21.

Liu

C.Y.

Zhao

H.G.

and Sun

Y.Z.

, 2009. Tectonic background of Ordos Basin and its controlling role for basin evolution and energy mineral deposits. Energy Exploration and Exploitation 27(1), 15–27.

Liu

D.H.

Geng

A.S.

Xiao

X.M.

Sun

Y.G.

Cheng

G.Y.

Chen

D.Y.

and Peng

W.S.

, 2004. Geochemical Characteristics of Marine and Carboniferous-Permian Gas-source Rocks & Natural Gas Migration and Accumulation. Guangdong Science and Technology Press, Guangzhou, pp. 135.

10.

Liu

X.F.

and Xie

X.N.

, 2001. Fluid flow, hydrocarbon migration and accumulation associated with salt tectonics. Faculty of Earth Resources 8(4), 343–350.

11.

Peng

D.M.

, 2004. Salt tectonics explaining technology. Oil Report of China 6, 9–15.

12.

Peters

K.E.

and Moldowan

J.M.

, 1995. Biomarker Compound Guide: Ancient Sediments and the Explanation of the Molecular Fossil in Oil. Oil Industry Press, pp. 236.

13.

Shi

J.A.

Zhao

and Wang

J.P.

, 2005. Geochemical characteristics of oil sand extracts in different state from sandstone reservoir: Linear hydrocarbon. Acta Sedimentologica Sinica 1(1), 62–70.

14.

Sun

Y.Z.

, 1998. Influences of secondary oxidation and sulfide formation on several maturity parameters in Kupferschiefer. Organic Geochemistry 29, 1419–1429.

15.

Sun

Y.Z.

and Puettmann

, 2000. The role of organic matter during metal accumulation in Permian Kupferschiefer from the Sangerhausen Basin, Germany. Organic Geochemistry 31(11), 1143–1161.

16.

Sun

Y.Z.

and Puettmann

, 2001. Oxidation of organic matter in the transition zone of the ZechsteinKupferschiefer from the Sangerhausen Basin, Germany. Energy and Fuels 15(4), 817–829.

17.

Sun

Y.Z.

J.L.

Chen

J.P.

Jin

K.K.

and Wang

, 2006. Experimental study of decay conditions of organic matter and its significance for immature oil generation. Energy Exploration and Exploitation 24(3), 161–170.

18.

Sun

Y.Z.

and Liu

C.Y.

, 2009. Concomitance of petroleum, coal, nature gas and uranium in the Ordos Basin, China. World Journal of Engineering 6(1), 174–179.

19.

Sun

Y.Z.

Qin

S.J.

Zhao

C.L.

and Kalkreuth

, 2010. Experimental study of early formation processes of macerals and sulfides. Energy and Fuels 24, 1124–1128.

Organic Geochemical Characteristics of Source Rocks in the Mizhi Region of Ordos Basin

Abstract

Keywords

Get full access to this article

References