Fracture Connectivity Characterization and Its Controlling Factors in Lower Jurassic Tight Sandstone Reservoirs of Eastern Kuqa Foreland Basin

被引：0
|
作者：
Gong L. [1 ,2 ]
Cheng Y. [2 ]
Gao S. [1 ,2 ]
Gao Z. [3 ]
Feng J. [3 ]
Wang H. [4 ]
Su X. [2 ]
Lu Q. [2 ]
Wang J. [2 ]
机构：
[1] Bohai⁃Rim Energy Research Institute, Northeast Petroleum University, Qinhuangdao
[2] College of Geosciences, Northeast Petroleum University, Daqing
[3] Petroleum Geology Research and Laboratory Center, PetroChina Research Institute of Petroleum Exploration and Development, Beijing
[4] Daqing Information Technology Research Center, Daqing
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2023年 / 48卷 / 07期
关键词：
controlling factor; eastern Kuqa foreland basin; fracture connectivity; petroleum geology; quantitative characterization; tight sandstone;
D O I：
10.3799/dqkx.2022.066
中图分类号：
学科分类号：
摘要：
The Lower Jurassic in eastern Kuqa foreland basin is a fractured tight sandstone reservoir. The distribution of natural fractures controls hydrocarbon accumulation and single well productivity. Fracture connectivity is a key factor affecting porosity and permeability performance, productivity of tight reservoirs and cap integrity, but it lacks in systematic research on quantitative characterization methods of fracture connectivity and its influencing factors. Taking the Lower Jurassic tight sandstone reservoirs in eastern Kuqa foreland basin as an example, in this paper it analyzes the fracture development characteristics, quantitatively characterizes the fracture connectivity using a fracture node types and their proportions based method, and analyzes the controlling factors of fracture connectivity using numerical simulation. There are three types of microfractures in the study area: intragranular microfractures, grain-edge microfractures and intergranular microfractures. From west to east, fracture connectivity deteriorates gradually, which is consistent with fracture development intensity. Fracture azimuth dispersion, fracture length, fracture density and angle between fracture sets are the main factors affecting fracture connectivity. With the increase of fracture azimuth dispersion, fracture length, fracture density and angle between fracture sets, fracture connectivity becomes better. © 2023 China University of Geosciences. All rights reserved.
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页码：2475 / 2488
页数：13
相关论文
共 40 条
  • [1] Alghalandis Y. F., Dowd P. A., Xu C. S., Connectivity Field: A Measure for Characterising Fracture Networks, Mathematical Geosciences, 47, 1, pp. 63-83, (2015)
  • [2] Bao Y.C., Liu Q.H., Du X.F., Et al., Division of Glutenite Lithofacies Based on the Trielement of Gravel-Matrix ‐ Fracture, Earth Science, 46, 6, pp. 2157-2171, (2021)
  • [3] Berkowitz B., Analysis of Fracture Network Connectivity Using Percolation Theory, Mathematical Geolo⁃ gy, 27, 4, pp. 467-483, (1995)
  • [4] Ding W.L., Wang X.H., Hu Q.J., Et al., Progress in Tight Sandstone Reservoir Fractures Research, Ad⁃ vances in Earth Science, 30, 7, pp. 737-750, (2015)
  • [5] Feng J.W., Zhao L.B., Wang Y.D., Controlling Factors for Productivity of Ultra ‐ Deep Tight Reservoirs in Keshen Gas Field, Kuqa Depression, Acta Petrolei Sinica, 41, 4, pp. 478-488, (2020)
  • [6] Ferrill D. A., Smart K. J., Cawood A. J., Et al., The Fold ‐ Thrust Belt Stress Cycle: Superposition of Normal, Strike ‐ Slip, and Thrust Faulting Deformation Regimes, Journal of Structural Geology, 148, (2021)
  • [7] Ghosh K., Mitra S., Two ‐ Dimensional Simulation of Controls of Fracture Parameters on Fracture Connectivity, AAPG Bulletin, 93, 11, pp. 1517-1533, (2009)
  • [8] Gong L., Fu X. F., Wang Z. S., Et al., A New Approach for Characterization and Prediction of Natural Fracture Occurrence in Tight Oil Sandstones with Intense Anisotropy, AAPG Bulletin, 103, 6, pp. 1383-1400, (2019)
  • [9] Gong L., Liu B., Fu X. F., Et al., Quantitative Prediction of Sub ‐ Seismic Faults and Their Impact on Waterflood Performance: Bozhong 34 Oilfield Case Study, Journal of Petroleum Science and Engineering, 172, pp. 60-69, (2019)
  • [10] Gong L., Gao M.Z., Zeng L.B., Et al., Controlling Factors on Fracture Development in the Tight Sandstone Reservoirs: A Case Study of Jurassic‐Neogene in the Kuqa Foreland Basin, Natural Gas Geoscience, 28, 2, pp. 199-208, (2017)
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