KL16 (Kenli 16) oilfield is located in Bohai Sea, close to Laizhou Bay
depression, with favorable reservoir forming conditions. The lower member of
Shahejie Formation (lower sub member of the third member of Shahejie formation)
has shallow burial, complex structural sedimentary evolution, diverse reservoir
lithology types, and unclear reservoir distribution laws, which restrict the
exploration and development process. Comprehensive use of core, seismic,
logging and analytical laboratory data, through the combination of structural
recovery and stratigraphic recovery, the micro paleogeomorphology of the lower
member of Shahejie Formation in the sedimentary period is finely restored, and
the sedimentary system and sedimentary model in the study area are defined. The
study shows that during the sedimentary period of the lower member of Shahejie
formation, four geomorphic units were developed in the study area: uplift,
slope, platform and depression; Under the control of paleogeomorphology, three
different sedimentary environments are developed: Braided River Delta is
developed in the west, shore shallow lake mixed beach bar is developed in the
middle, and fan delta is developed in the south. Based on the analysis of
regional geology and sedimentary characteristics, the principal component
coupling technology based on the constraint of sedimentary facies belt is
optimized for reservoir distribution prediction, and the application effect is
good.
References
[1]
Zhao, J.X., Chen, H.D. and Shi, Z.Q. (2001) Technical Methods and Research Significance of Paleogeomorphology Restoration: A Case Study of Pre Jurassic Paleogeomorphology in Ordos Basin. Journal of Chengdu Institute of Technology, 28, 260-266.
[2]
Lin, C.S., Yang, H.J., Liu, J.Y., Cai, Z.Z. and Yang, X.F. (2009) Paleostructural Geomorphology of the Paleozoic Central Uplift Belt and Its Constraint on the Development of Depositional Facies in the Tarim Basin. Science in China Series D: Earth Science, 2, 823-834. https://doi.org/10.1007/s11430-009-0061-8
[3]
Liu, B.J., Yuan, L.Z., Shen, J., et al. (2006) Paleogeomorphic Characteristics of the Northern Slope of the South China Sea and the Deep Water Fan of the Pearl River since 138 ma. Journal of Sedimentation, 24, 476-482.
[4]
Deng, H.W., Wang, H.L. and Wang, D.Z. (2001) The Control of Paleogeomorphology on the Sequence Filling Characteristics of Continental Rift Basin: A Case Study of the Lower Tertiary in the West Slope Area of Bozhong Sag Petroleum and Natural Gas. Geology, 22, 293-303.
[5]
Zhang, J.L., Lin, C.S. and Zheng, H.R. (2002) The Control of Fault, Paleogeomorphology and Provenance on the Sedimentary System in the Faulted Lake Basin—Taking the Third Member of Shahejie Formation in Gubei Sag as an Example. Oil and Gas Geology and Recovery Factor, 9, 24-27.
[6]
Li, Z.D., Bao, C.H., Wang, D.J. and Zhang, H.X. (2016) Control of Structure Paleogeomorphology on Sedimentary Sand Bodies in Wuerxun Beier Sag of Hailar Basin. Journal of Central South University: Natural Science Edition, 47, 2357-2365.
[7]
Xian, B.Z., Wang, Z., Ma, L.C., Chao, C.Z., Pu, Q., Jing, A.Y. and Wang, J.H. (2017) Study on Integrated Restoration of Paleogeomorphology and Paleowater System in Sedimentary Area Denudation Area: Taking Guantao Formation in Liaodong East Area of Bohai Bay Basin as an Example. Geosciences, 42, 1922-1925.
[8]
Wang, J.T. and Fan, A.P. (2022) The Control of Paleogeomorphology on the Type and Distribution of Sedimentary Systems—Taking the Second Member of Dongciwa in Huanghekou Sag as an Example. Journal of Sichuan Normal University (Natural Science Edition), 45, 270-279.
[9]
Hou, G.F., Wang, L.B., Song, B., Zeng, D.L., Jia, K.F., Dou, Y. and Li, Y.Z. (2022) Bloomberg, Guo Huajun, Zou Zhiwen, Si Xueqiang The Control of Paleogeomorphology of Depression Lake Basin on Sedimentary System—Taking the Second Member and First Sand Formation of Jurassic Sangonghe Formation in the Central Junggar Basin as an Example. Acta Geologica Sinica, 96, 2519-2531.
[10]
Li, J.J., Wang, J.P., Wang, L., Fu, B., Xia, H. and Li, Z.X. (2021) Paleogeomorphic Restoration and Its Control over the Sedimentary Sand Bodies in the Delta Front—Taking Sub Members 1-3 of the Permian Shanxi Formation in Qingyang Gas Field, Ordos Basin as an Example. Petroleum and Natural Gas Geology, 42, 1136-1145+1158.
[11]
Wang, Q.M., Huang, X.B., Zhou, X.G., et al. (2018) Restoration of Prototype Basin of the Fourth Member of the Shahejie Formation and the Lower Member of the Third Member of the Shahejie Formation in Lainan Slope Belt and Its Control over Sedimentation. Journal of Geomechanics, 24, 371-380.
[12]
Kang, H.L., Lin, C.S. and Niu, C.M. (2021) Paleogeomorphologic Characteristics of Dongying Formation in the Southeast Structural Belt of the Shahejie Sea in the Western Bohai Sea and Its Control on Sedimentation. Journal of Geomechanics, 27, 19-30.
[13]
Niu, C.M. (2012) Structural Evolution and Hydrocarbon Accumulation in Laizhouwan Sag in the Southern Bohai Sea. Petroleum and Natural Gas Geology, 33, 424-431.
[14]
Hu, S.H. (2004) Structural Sedimentary Comprehensive Analysis Method Based on Seismic Data: A New Method for Denudation Thickness Recovery. Petroleum Geophysical Exploration, 39, 479-481.
[15]
Mu, Z.H., Tang, Y., Cui, B.F., et al. (2002) Study on the Recovery of Stratum Denudation Thickness in Southwest Tajikistan. Journal of Petroleum, 23, 40-44.
[16]
Jiu, K., Ding, W.L., Li, C.Y. and Zeng, W.T. (2012) Research and Progress of Paleostructure Restoration Methods in Petroliferous Basins. Lithologic Oil and Gas Reservoirs, 24, 13-19.
[17]
Sui, L.W. (2020) Influence of Paleogeomorphic Characteristics on Sedimentary System and Oil and Gas Distribution in Tanan Sag. Lithologic Oil and Gas Reservoir, 32, 48-58.
[18]
Wang, C.J., Huang, X.B., Guo, T., Xie, J., Guo, R. and Yao, C. (2017) High Precision Paleogeomorphology Restoration Technology and Its Application—Taking the Lower Member of the Second Member of Dongying Formation in the Southern Part of Liaoxi Uplift as an Example. Modern Geology, 31, 1214-1221+1240.
[19]
Xin, Y.L., Ren, J.Y. and Li, J.P. (2013) The Control of Structure Paleogeomorphology on Sedimentation—Taking the Third Member of Shahejie Formation of Laizhouwan Sag in the South of Bohai Sea as an Example. Petroleum Exploration and Development, 40, 302-308. https://doi.org/10.1016/S1876-3804(13)60039-7
[20]
Zhou, L.D., Sun, F.T., Lai, Y.C., Zhang, G.K. and Liu, W.C. (2019) Sedimentary Characteristics and Evolution of Shahejie Formation in KL Oilfield of Laizhouwan Sag, Bohai Sea under the Mixed Deposition Background. Journal of Ocean University of China (Natural Science Edition), 49, 110-120.
[21]
Tao, Q.Q., Li, D., Lin, S.C., Ding, X.H. and Zhang, J.X. (2016) Application of Seismic Geological Comprehensive Reservoir Prediction Technology in the Study of Sedimentary Microfacies of Wushi a Structure. Geological Science and Technology Information, 35, 131-137.
[22]
Zhang, L., Tang, H.B., Wu, Q.L., Mu, P.F. and Yue, H.L. (2021) Application of Thin Interbed Reservoir Prediction Technology Driven by Well Data in Bohai a Oilfield. Xinjiang Petroleum and Natural Gas, 17, 7-12+1.
