1887

Abstract

Summary

Oil-gas reservoirs in sandy conglomerate diagenetic traps, developed in the fan delta of the Triassic Baikouquan Formation, Mahu sag, Junggar Basin, are different from lithologic reservoirs controlled by sedimentary facies. In this study, mineralogical and petrological data are employed to evaluate formation. The results indicate that reservoirs developed in the sandy conglomerate of distributary channels in the fan delta front, with the boundary controlled by reservoir quality. Differences in reservoir quality were controlled by differential diagenesis generated from detrital feldspar concentrations, paleogeotemperature environment, and formation fluids in the sandy conglomerate. Reservoir qualities of the Baikouquan Formation were improved during deep burial due to the formation of secondary pores from feldspar dissolution. Feldspar dissolution mainly depends on feldspar concentrations, acid formation water, and paleo-temperatures. When all three conditions are not satisfied the reservoir quality cannot be effectively improved and instead becomes a diagenetic dense layer that acts as a barrier to oil and gas. Therefore, they are diagenetic traps. This is a newly identified type of trap, and this study enriches the understanding of oil and gas accumulation in complex superimposed basins.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201801142
2018-06-11
2024-04-20
Loading full text...

Full text loading...

References

  1. Carroll, A. R., Liang, Y. H., Graham, S. A., Xiao, X. C., Hendrix, M. S., Chu, J. C. and McKnight, C. L.
    [1990] Junggar basin, northwest China: trapped Late Paleozoic ocean. Tectonophysics, 181, 1–14.
    [Google Scholar]
  2. Chen, X, Lu, H. F., Shu, L. S., Wang, H. M. and Zhang, G. Q.
    [2002] Study on tectonic evolution analysis of Junggar Basin(in Chinese with English abstract). Geological Journal of China Universities, 8, 257–267.
    [Google Scholar]
  3. He, D. F., Zhang, Y. J. and Kuang, J.
    [2002] Tectonic characteristic and oil & gas field distribution of Junggar Basin (in Chinese), in Li, D. S. et al.,, eds., Tectonics of Oil and Gas Basins in China. Petroleum Industry Press, 598–619.
    [Google Scholar]
  4. Hou, L. H., Zou, C. N., Kuang, L. C., Wang, J. H., Zhang, G. Y., Kuang, J. and Liu, L.
    [2009] Discussion on controlling factors for Carboniferous hydrocarbon accumulation in the Ke-Bai fractured zone of the northwestern Margin in Junggar Basin (in Chinese with English abstract). Acta Petrolei Sinica, 30, 513–517.
    [Google Scholar]
  5. Lei, D.W., Qu, J.H., An, Z.Y., You, X.C. and Wu, T.
    [2015] Hydrocarbon accumulation conditions and enrichment regularity of low permeability glutenite reservoirs of Baikouquan Formation in Mahu sag, Junggar Basin (in Chinese with English abstract). XinJiang Petroleum Geology, 36, 642–647.
    [Google Scholar]
  6. Liu, H.M.
    [2009] Pressure response to hydrocarbon charging events in Es3 member of Minfeng sub-sag (in Chinese with English abstract). Xinjiang Petroleum Geology, 30, 483–485.
    [Google Scholar]
  7. Pang, X. Q., Zhou, X. Y., Jiang, Z. X., Wang, Z. M., Li, S. M., Tian, J., Xiang, C. F., Yang, H. J., Yang, D. X., Yang, W. J. and Pang, H.
    [2012] Hydrocarbon reservoirs formation, evolution, prediction and evaluation in the superimposed basins(in Chinese with English abstract). Acta Geologica Sinica, 86, 1–103.
    [Google Scholar]
  8. Pang, X. Q., Luo, X. R., Jang, Z. X. C. Lin, S., Zhang, S. C., Zhong, N. N. and LiZ.
    [2007] Advancements and problems on hydrocarbon accumulation research of complicated superimposed basins in western China(in Chinese with English abstract). Advances in Earth Science, 22, 879–887.
    [Google Scholar]
  9. Zhi, D.M.
    [2017] Discovery and hydrocarbon accumulation mechanism of Quasi-continuous high-efficiency reservoirs of Baikouquan Formation in Mahu sag, Junggar Basin (in Chinese with English abstract). XinJiang Petroleum Geology, 37, 373–382.
    [Google Scholar]
  10. Zhu, Y. H., Wang, Y. M., Yuan, S. K. and Xing, X. R.
    [2008] Sedimentary characteristics and hydrocarbon accumulation rules in northwestern Junggar Basin: a case from Jiamuhe formation of no. 5 and no. 8 area( in Chinese with English abstract). Petroleum Exploration and Development, 35, 576–580.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801142
Loading
/content/papers/10.3997/2214-4609.201801142
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error