The Neogene fluvial reservoir in the Bohai oilfield is one of the leading development horizons for increasing reserves and production in the Bohai oilfield. However, the development of offshore fluvial reservoirs is faced with the problems of thin reservoir thickness, narrow plane width, rapid lateral change, and thin well pattern. Taking the KLA oilfield as an example, this paper discusses the nuanced characterization and configuration of a single channel controlled by sedimentary facies to guide developing offshore river facies’ narrow channel main control oilfield. Firstly, based on a large number of core data, the acceptable sedimentary facies identification is realized, the sedimentary model of the study area is established, the delicate calibration of logging facies and seismic facies is realized under the constraint of the sedimentary model, and a set of technical methods for nuanced reservoir characterization guided by seismic sedimentology is summarized, to realize the boundary identification of composite channel configuration and further realize the nuanced characterization of the single narrow channel. Based on this set of technology, it guides the smooth implementation of horizontal wells in the oilfield. The drilling encounter rate of the reservoir in the horizontal section of the single well exceeds 90%, ensuring the injection production connectivity and increasing the reserve production rate by more than 10%.
References
[1]
Jiang, J.W., Wei, J.W., Lu, X.O., et al. (2006) Fine Reservoir Research Guides the Deployment of Efficient Adjustment Wells in the Later Stage of Oilfield Development. Petroleum Geology and Engineering, 20, 30-33.
[2]
Zhu, J.M., Dalia, J.C., et al. (2018) Influence of Fine Description of Reservoir Rhythm on Oilfield Development—Taking G Sand Body of X Oilfield in Bohai Sea as an Example. Fault Block Oil and Gas Field, 25, 185-189.
[3]
Zhang, Y.X. (2010) Study on Sedimentary Microfacies of Fuyu Reservoir in Block Tai 1 of Toutai Oilfield. Zhejiang University, Hangzhou.
[4]
Hu, M.Y. and Liu, X.Q. (2009) Application of Logging Facies in Sedimentary Microfacies Analysis of quan3 and quan4 Members in Northern Songliao Basin. Lithologic Reservoir, No. 1, 102-106.
[5]
Song, Y., Jin, Z.K., Wang, X.W., et al. (2006) Control of Sedimentary Relative Reservoir Quality—Taking Zao II and III Oil Layers of Wangguantun Oilfield in Huanghua Depression as an Example. Petroleum Exploration and Development, 33, 2.
[6]
He, J.L. (2015) Research and Effect of Phased Oil Stabilization and Water Control in the Middle and Late Stage of Jingbei Buried Hill Reservoir Development. Chemical Management, No. 11, 154.
[7]
Liu, J. (2016) Fine Geological Study of Chang 8 Reservoir in FS District, Huanxian County, Ordos Basin. Xi’an University of Petroleum, Xi’an.
[8]
Li, H.X., Liu, Q.W., Wen, C.Y., et al. (2006) Review on Remaining Oil Distribution and Potential Tapping. Special Oil and Gas Reservoir, 13, 8-11.
[9]
Li, S.L., Zhao, S. and Fu, J. (2008) Based on the Distribution and Evolution Law of Sedimentary Microfacies in Zhenjing Oilfield, Ordos Basin, the Adjustment Direction of Oilfield Development Is Analyzed. Frontier of Geosciences, 15, Article No. 6.
[10]
Sa, L.M., Wang, T.Q., Shi, Y.M., et al. (2002) Subdivision of Lithofacies Units in the Middle and Late Stage of Oilfield Development. Acta Sedimentologica Sinica, 20, 595-599.
[11]
Zhu, Z.L., Xiong, D., Yue, Y.Z., et al. (2013) Study on the Relationship between Sedimentary Facies and Remaining Oil Distribution of Karamay Formation in the First East Area of Karamay Oilfield. Lithologic Reservoir, 25, 112-118.
[12]
Yu, X.H. (2012) Problems Faced by Reservoirs in the Middle and Late Stage of Oilfield Development and Geological Characterization Method Based on Sedimentary Genesis. Geoscience Frontier, 19, 1-14.
[13]
Ji, B.Y., Zhao, G.Z., Wang, S.G., et al. (2006) Geological Modeling Technology of Reservoir Controlled by Sedimentary Facies. Journal of Petroleum, 27, 4.
[14]
Xu, Z.B., Kang, K., Shen, C.S., et al. (2015) Study on Sedimentary Microfacies of the Lower Member of Neogene Minghuazhen Formation and Guantao Formation in L Oilfield in Bohai Sea. Lithologic Reservoir, 27, 6.
