微CT扫描重建低渗气藏微观孔隙结构--以新场气田上沙溪庙组储层为例

doi:10.11743/ogg20110519

Abstract

Abstract:

In order to enhance gas recovery,it is necessary to construct pore network model and quantitatively describe micro-pore-scale percolation mechanism based on micro-pore structure.Taking cores of the Upper Sha-ximiao Formation in the Xinchang gas field of western Sichuan Basin as an example,this paper studies 3D reconstruction of pore structure.First,using micro-CT to scan core to get projection data,and using the FDK algorithm for construction of grayscale images.Then based on experimental porosity,using 2-value segmentation to cut grayscale images and using ray tracing algorithm to get 3D pore structure image(digital core).Statistical analysis of the properties of digital core shows that the porosity of digital core is almost identical to the measured core porosity with a relative error of only 0.1,which is in coincide with the properties of Upper Shaximiao Formation in the Xinchang gas field.It shows that reconstruction of micro pore structure with micro-CT scanning is feasible.The study provides a solid foundation for pore network modeling and subsequent microscopic flow simulation study.

Key words: resolution, 2-value segmentation, ray tracing, micro-CT, microscopic pore structure, low permeability gas pool, Xinchang gas field

CLC Number:

TE122.2

Su Na, Duan Yonggang, Yu Chunsheng. Reconstruction of microscopic pore structure in low permeability gas reservoirs by micro-CT scanning: an example from the Upper Shaximiao Formation in Xinchang gas field[J]. Oil & Gas Geology, 2011, 32(5): 792-796.

References

[1] 姚军, 赵秀才, 衣艳静, 等. 数字岩心技术的发展及展望[J]. 油气地质与采收率, 2005, 12(6): 52-54. Yao Jun, Zhao Xiucai, Yi Yanjing, et al. The current situation and prospect on digital core technology[J]. Petroleum Geology and Recovery Efficiency, 2005, 12(6): 52-54. [2] Dunsmuir J H, Ferguson S R, D'Amico K L, et al. X-ray micro-tomography: a new tool for the characterization of porous media. SPE Annual Technical Conference, Dallas, Texas: Journal of Petroleum Science and Engineering, 1991: 423-430. [3] Hazlett R D. Statistical characterization and stochastic modeling of pore networks in relation to fluid flow[J]. Mathematical Geology, 1997, 29(4): 801-822. [4] Bakke S, ren P E. 3-D pore-scale modeling of sandstones and flow simulations in the pore networks[J]. Journal of Petroleum Science and Engineering, 1997, 2(2): 136-149. [5] Okabe H, Blunt M J. Prediction of permeability for porous media reconstructed using multiple-Point statistics[J]. Physical Review E, 2004, 70, 066135. [6] Kak A C. Slaney M. Principles of computerized tomographic imaging[M]. New York: IEEE Press, 1988. [7] Feldkamp L A, Davis L C, Kress J W. Practical cone-beam algorithm[J]. Journal of the Optical Society of America, 1984, 1(6): 612-619. [8] Wang G, Liu Y, Lin T H, et al. Half-scan cone-beam x-ray micro tomography formula[J]. Scanning, 1994, 16(4): 216-220. [9] Grass M, Köhler T, Proksa R. 3-D Cone-beam CT reconstruction for circular trajectories[J]. Physics in Medicine and Biology, 2000, 45(2): 329-347. [10] Liu Y, Liu H, Wang G. Half-scan Cone-beam CT fluoroscopy with multiple X-ray source. [J], Medical Physics, 2001, 28(7): 1466-1471. [11] 翟静. 三维锥束CT中滤波反投影算法的研究. 太原: 中北大学, 2008. Zhai jing. Research on filtered back projection algorithm in 3D cone-beam CT. Taiyuan: North University of China, 2008. [12] 王培珍. 基于二维阈值化与FCM相混合的图像迅速分割方法[J]. 中国图像图形学报, 1998, 3(9): 735-738. Wang Peizhen. Image segmentation based on fuzzy clustering and Two-dimensional Thresholding[J]. Journal of Image and Graphics, 1998: 3(9): 735-738. [13] Whitted T. An Improved illumination model for shaded display[J]. Communications of the ACM, 1980, 23(6): 343-349. [14] 叶泰然, 付顺, 吕其彪, 等. 多波地震联合反演预测相对优质储层--以川西深层致密碎屑砂岩为例[J]. 石油与天然气地质, 2009, 30(3): 357-362, 369. Ye Tairan, Fu Shun, Lü Qibiao, et al. Application of multiwave joint inversion to the prediction of relatively high-quality reservoirs-an example from the prediction of deep tight clastic sandstone reservoirs in the western Sichuan Basin[J]. Oil & Gas Geology, 2009, 30(3): 357-362, 369. [15] 张大伟. 加速我国页岩气资源调查和勘探开发战略构想[J]. 石油与天然气地质, 2010, 31(2): 135-139, 150. Zhang Dawei. Strategic concepts of accelerating the survey, exploration and exploitation of shale gas resources in China[J]. Oil & Gas Geology, 2010, 31(2): 135-139, 150. [16] 戴金星, 黄士鹏, 刘岩,等. 中国天然气勘探开发60年的重大进展[J]. 石油与天然气地质, 2010, 31(6): 689-698. Dai Jinxing, Huang Shipeng, Liu Yan et al. Significant advancement in natural gas exploration and development in China during the past sixty years[J]. Oil & Gas Geology, 2010, 31(6): 689-698. [17] 孙家广. 计算机图形学[M]. 第三版. 北京: 清华大学出版社, 2003. Sun Jiaguang. Computer graphics[M]. Third Edition. Beijing: Tsinghua University Press, 2003.

Reconstruction of microscopic pore structure in low permeability gas reservoirs by micro-CT scanning: an example from the Upper Shaximiao Formation in Xinchang gas field

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