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The early Ordovician Majiagou reservoir of the Jingbian Field, Northwest China: Karstic peritidal dolomite

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Abstract

The Jingbian Field is located in the central part of the Ordos Basin in the west part of the North China Platform. It is the largest gas field discovery in China in the 1980’s. The field is an example of production from a paleogeomorphic trap formed by karstification of Lower Ordovician peritidal dolomites. In terms of gas potential, the Majiagou Formation is the more important stratigraphic unit. It is composed of six members, the uppermost member (O1m6) has been largely removed by prolonged Caledonian karst erosion, leaving the underlying (O1m5) member to provide the main pay for the field. In spite of the 163 wells drilled the field presents many problems and uncertainties because of the poor seismic definition of the pay zones and the great reservoir heterogeneity of the karst system. Statistical data from more than 30 wells show a poor correlation between individual well-flow rates and thickness of the karstic zone or distance of wells, relative to a paleeochannel. This suggests karstification is not the most important factor controlling productivity. The release of organic acids (during maturation of the source rock) and fracturing in response to Cretaceous tectonic event appear to be key factors responsible for the productivity of the Majiagou-5 (O1m5) reservoir in terms of modifying and enlarging the pore network. Carboniferous clays provide an effective updip seal through the infill of karst-breccia zones. High productivity is prominent along structural axes where karstic fractures, solution vugs and caverns are interconnected by vertical to sub-vertical fractures. On the basis of pore-type the Majiagou-5 Member reservoirs can be divided into four reservoir types, each allowing differentiation of reservoir quality through characteristic porosity-permeability ranges and capillary-pressure curves. Key aspects which affect the commerciality of the field are still uncertain but with recent test wells producing gas with water, considerations should focus on the mechanism of weak edge-water drive and the need to predict fracture zones.

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References

  • CHEN, A.D., 1994, Origin and migration of natural gas in Ordovician reservoir in Shanganning Basin Central Gas Field:Acta Petrolei Sinica, v. 15, no. 2, p. 1–10 (in Chinese).

    Google Scholar 

  • FENG, Z.Z., CHEN, J.X., and ZANG, J.S., eds., 1991, Lithofacies-Paleogeography of Early Paleozoic of the Ordos Basin. Geology Press, Beijing, 190 p. (in Chinese).

    Google Scholar 

  • GUAN, D.S., ZANG, W.Z., and FEI, G., 1993, Source rocks for the Ordovician reservoir in the central gas field of the Ordos Basin:Oil and Gas Geology, v. 14, no. 3, p. 191–198 (in Chinese).

    Google Scholar 

  • HAO, S.M., SHI, J.P., and XU, W.N., 1993, Caledonian karstification and its control on hydrocarbon migration and accumulation in the northern Ordos Basin:Natural Gas Industry, v. 13, no. 5, p. 13–19 (in Chinese).

    Google Scholar 

  • HUA, B.Q., LI, X.X., and YANG, X.M., 1994, The underpressure gas reservoir and gas migration of Ordovician in Oerhtossu:Acta Sedimentologica Sinica, v. 11, no. 2, p. 105–113 (in Chinese).

    Google Scholar 

  • HUANG, Y.M., 1993, Dolomite reservoir characteristics in the central gas field of the Shanganning (Ordos) Basin:Natural Gas Industry, v. 13, no. 5, p. 31–34 (in Chinese).

    Google Scholar 

  • JIANG, J.Y. and CHEN, G.Q., 1993, Lateral prediction of Ordovician karstic reservoir from seismic in the central gas field of the Ordos Basin:Natural Gas Industry, v. 13, no. 5, p. 6–12 (in Chinese).

    Google Scholar 

  • LI, D.S., ZANG, Z.L., and XU, X.R., 1994, Control of paleomorphology and structure on gas pools in the central Ordos Basin:Petroleum Exploration and Development, v. 21, no. 3, p. 9–14 (in Chinese).

    Google Scholar 

  • MA, Z.F., CHEN, A.N., and CAO, X.H., 1993, Reservoir evaluation in the central gas field of the Ordos Basin:Petroleum Exploration and Development, v. 20, no. 6, p. 92–98 (in Chinese).

    Google Scholar 

  • TAN, G.X. and ZENG, Y.F., 1993, Diagenesis and porosity evolution of the Ordovician carbonate in the eastern Ordos Basin:Petroleum Explaration and Development, v. 20, no. 3, p. 92–101 (in Chinese).

    Google Scholar 

  • TANG, X.M. and HUI, Y.B., 1993, Central uplift and its gas accumulation in the Ordos Basin:Oil and Gas Geology, v. 14, no. 1, p. 64–71 (in Chinese).

    Google Scholar 

  • WANG, H.F., and JIANG, J.Y., 1992, Discussion on the relationship between hydrocarbon accumulation and Ordovician Majiagou Formation salt distribution in the central Ordos Basin:Petroleum Exploration and Development, v. 19, no. 6, p. 97–102 (in Chinese).

    Google Scholar 

  • YANG, J.J., 1992, Changqing Oil Province: Petroleum Geology of China, v. 12, Petroleum Industry Press, Beijing, 490 p. (in Chinese).

    Google Scholar 

  • YANG, J.J., XIE, Q.B. and SONG, G.C., 1992, Trap-forming model and gas accumulation in the Ordovician karsticpaleomorphologic trap, Ordos Basin:Natural Gas Industry, v. 12, no. 4, p. 8–13.

    Google Scholar 

  • ZANG, J.S., YANG, Y.H., WANG, S.F., and SHUAI, S.M., 1995, Ordovician deposition in Ordos area and the relation with natural gas:Natural Gas Industry, v. 15, no. 2, p. 5–10 (in Chinese).

    Google Scholar 

  • ZANG, S.Y., 1994, Source rocks for gas accumulation and future exploration strategies in the Ordos Basin:Natural Gas Industry, v. 14, no. 3, p. 1–4 (in Chinese).

    Google Scholar 

  • ZENG, C.B. and XIE, Q.B., 1993, Characteristics of Ordovician karstic reservoir in the central Ordos Basin.Natural Gas Industry, v. 13, no. 5, p. 26–30 (in Chinese).

    Google Scholar 

  • ZENG, S.H., YANG, S.Y., and LIU, K.X., 1993, Ordovician karst and reservoir rocks in the central gas field of the Ordos Basin:Natural Gas Industry, v. 13, no. 5, p. 20–25 (in Chinese).

    Google Scholar 

  • ZHANG, M.L., LU, T., ZHANG, Z.L., LI, Y.G., and QIN, Z.B., 2000, Integrated gas-reservoir evaluation during early development stage, Jingbian area, Changqing Gas Field,in Changqing Oilfield Research Institute, ed., Research Papers on Petroleum Exploration and Development in the Ordos Basin, 1990–2000, p. 420–430 (in Chinese).

  • ZHANG, M.L., LU, T., LI, Y.J., LI, Y.G., and DA, S.P., 2001. Productivity analysis and production strategy of the Lower Paleozoic gas reservoir, Jingbian Field,in W.R. Hu, ed., New techniques in petroleum exploration and development in the Changqing Field. Petroleum Industry Press. Beijing, p. 167–179 (in Chinese).

    Google Scholar 

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  1. Sinopec International Petroleum Exploration and Production Corporation, No. 58 An Wai Dajie, Dongcheng District, 100011, Beijing, P.R. China

    Wenhua Zhang

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  1. Wenhua Zhang
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Correspondence to Wenhua Zhang.

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Zhang, W. The early Ordovician Majiagou reservoir of the Jingbian Field, Northwest China: Karstic peritidal dolomite. Carbonates Evaporites 19, 93–106 (2004). https://doi.org/10.1007/BF03178473

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