The formation time of the Chang 6 reservoir was determined semi-quantitatively by petrographic observation, fluorescence spectral analysis, homogeneous temperature test and salinity calculation of fluid inclusions in the Chang 6 reservoir of the Qilicun oilfield, as well as sonic time difference method to recover the stripping thickness of the strata at the end of the Early Cretaceous, based on the study method of burial-thermal evolution history map with homogeneous temperature cast points of inclusions. The results show that brine inclusions, gas-liquid brine inclusions and a few oil inclusions are mainly distributed in quartz healing microfractures and some feldspar grains, mainly oval or irregular in shape, with sizes ranging from 3 to 10 μm. The fluorescence colors of oil inclusions are mainly yellowish green and green; the fluorescence spectra of oil inclusions are similar to those of hydrocarbon associated brine inclusions. The analysis of the uniform temperature, salinity and burial history of the oil inclusions indicates that the oil reservoir in the Chang 6 section of the Qilicun field was formed in the Early Cretaceous (135 - 100 Ma) in the first stage, the initial filling period (135 - 120 Ma), and the second stage, the massive filling period (120 - 100 Ma). This study can provide some geological basis for oil exploration and development in the Qilicun field and adjacent areas.
Cite this paper
Zhu, J. , Chen, S. and Zhang, Y. (2022). Application of Fluid Inclusions in Reservoir Formation: A Case Study of Qilicun Oilfield in Ordos Basin. Open Access Library Journal, 9, e9556. doi: http://dx.doi.org/10.4236/oalib.1109556.
Pan, L.Y., Ni, P., Ou, G.X., et al. (2006) Application of Organic Inclusion Study in Petroleum Geology—Conception, Classification, Formation Mechanism and Significance. Bulletin of Mineralogy, Petrology and Geochemistry, 25, 19-28.
Zhan, W.Z. and Kelsang, W.D. (2018) Fluid Inclusion Analysis for Ezongcuo Area of Upper Triassic Formation in Qiangtang Basin. Fault-Block Oil and Gas Field, 25, 5.
Zhao, H.Q., Chen, C.L., Chen, X.M., et al. (2018) Coupling Relationship between Diagenesis and Hydrocarbon Charging in Upper 3rd Member of Eogene Shahejie Formation of Kenli 10-4 Oilfield. Fault-Block Oil and Gas Field, 25, 5.
Chen, L., Xu, C.G., Yang, H.F., et al. (2017) Characteristics of Cenozoic Fluid Inclusions and Accumulation Period in Southern Slope of Huanghekou Sag. Fault-Block Oil and Gas Field, 24, 5.
Wang, N.J., Zhao, J.Z., et al. (2010) Determination of the Age of Accumulation by Fluid Inclusion with an Example from Triassic Yanchang Formation in the Xiasiwan Area, Ordos Basion. Journal of Lanzhou University (Natural Sciences), 46, 22-25.
Fu, J.H., Liu, G.D., Yang, W.W., et al. (2013) A Study of the Accumulation Periods of Low Permeability Reserivor of Yangchang Formation in Longdong Area, Ordos Basin. Earth Science Frontiers, 20, 125-131.
Zhao, J.Z., Meng, X.G. and Han, Z.H. (2020) Near-Source Hydrocarbon Accumulation: Geochemical Evidence of Lacustrine Crude Oil from the Member 6 of Yanchang Formation, Eastern Margin of Ordos Basin. Acta Petrolei Sinica, 41, 1513-1526.
Bai, Y.B., Zhao, J.Z., Huang, Y.J. and Han, Z.H. (2022) Excellent Source Rocks Found along the Margin of a Large Lacustrine Basin: Case Study from the Ordos Basin, China. Journal of Petroleum Science and Engineering, 214, Article ID: 110569. https://doi.org/10.1016/j.petrol.2022.110569
Cui, L., Liao, X., Zhou, L., et al. (2019) Paleogeomorphic Influence on Facies Characteristics of Braided Delta and Reservoir Prediction—An Example from L Oilfield in Bohai Bay Basin. Journal of Geoscience and Environment Protection, 7, 195-205.
https://doi.org/10.4236/gep.2019.78014
Wang, Q.Y., Yang, W., Ge, Y.J., et al. (2021) Diagenetic Responses to Delta Front-Lacustrine Depositional Microfacies and Implications for Tight Reservoir Quality Differences in the Yanchang Formation, Western Ordos Basin. Acta Sedimentologica Sinica, 39, 841-862.
Deng, X.Q., Fu, J.H. and Yao, J.L. (2011) Sedimentary Facies of the Middle-Upper Triassic Yanchang Formation in Ordos Basin and Breakthrough in Petroleum Exploration. Journal of Palaeogeography, 13, 443-455.
Zhao, Y.J. and Chen, H.H. (2008) The Relationship between Fluorescence Colors of Oil Inclusions and Their Maturities. Earth Science—Journal of China University of Geosciences, 33, 6.
Li, C.Q., Chen, H.H. and Liu, H.M. (2010) Identification of Hydrocarbon Charging Events by Using Micro-Beam Fluorescence Spectra of Petroleum Inclusions. Earth Science—Journal of China University of Geosciences, 35, 657-662.
Si, S.H., Chen, H.H., Yuan, B.L., et al. (2010) Identification of Hydrocarbon Charging Events by Using Fluorescence Spectrum Multiparameter of Oil Inclusions: A Case Study of Carboniferous in Bashituo Structural Belt of Markit Slope of Tarim Basin. Marine Origin Petroleum Geology, 35, 657-662.
Ren, Z.L., Zhang, S., Gao, S.L., et al. (2007) Tectonic Thermal Evolution History of Ordos Basin and Its Significance in Reservoir Formation and Mineralization. Science in China Press, No. S1, 23-32.
Mi, J.K. (2003) Migration and Accumulation Characters of the Upper Paleozoic Gas Reservoir in Ordos Basin. Master’s Thesis, Chinese Academy of Science (Guangzhou Institute of Chemistry), Guangzhou.
Liu, J.L., Liu, K.Y. and Gui, L.L. (2019) Fluid Inclusion Characteristics and Hydrocarbon Charge History in the Upper Paleozoic, Central Ordos Basin. Journal of China University of Petroleum (Edition of Natural Science), 43, 13-24.
Liu, R.C., Ren, Z.L., Ma, K., et al. (2019) Classification of Hydrocarbon Accumulation Phases of Yanchang Formation in Southern Ordos Basin. Geoscience, 33, 1263-1274.
Han, Z.H., Zhao, J.Z. and Chen, M.N. (2020) Fluid Inclusion Characteristics and Hydrocarbon Accumulation Period of He8 Member Reservoir in the Western Area of Sulige Gasfield. Journal of Xi’an Shiyou University (Natural Science Edition), 35, 18-27.
Cao, Q., Gao, J.M., Fan, L.Y., et al. (2015) Characteristics and Significance of Fluid Inclusions in Upper Paleozoic of Southwest Ordos Basin. Natural Gas Geoscience, 26, 2245-2253.
Zhao, G.P. (2017) Characterization of Fluid Inclusions and Timing of Gas Accumulation in Upper Paleozoic Reservoirs of Hangjinqi Area, Ordos Basin. Oil and Gas Geology, 38, 905-912.
