Dynamics simulation and laws of drilling fluid loss in fractured formations

被引：0

作者：

Wang M. ^{[1
]}

Guo Y. ^{[1
]}

Fang M. ^{[1
]}

Zhang S. ^{[1
]}

机构：

[1] School of Petroleum Engineering, China University of Petroleum, Qingdao, 266580, Shandong

来源：

Shiyou Xuebao/Acta Petrolei Sinica | 2017年 / 38卷 / 05期

关键词：

Bingham fluid; Cumulative loss; Drilling fluid loss; Loss rate; Rough fracture;

D O I：

10.7623/syxb201705013

中图分类号：

学科分类号：

摘要：

Well loss is one of the common complex downhole conditions during the drilling in fractured formations. On the basis of fluid dynamics theory, the control equation of fluid loss in 2D rough fractures has been established to basically understand the occurrence mechanism of fluid loss. During the deduction of such equation, drilling fluid is modeled as Bingham fluid and the fracture is described as 2D single fracture with rough surface, index deformation and dip angle. Finite element method is used to solve the fluid loss control equation; based on the created model, the loss laws of drilling fluid in a two-dimension rough fracture has been analyzed. Research results indicate that the smoother the fracture is, the greater the loss rate and the cumulative loss will be; the fracture dip has less impact on loss rate while affects the cumulative loss; the greater the fracture area is, the greater the loss rate and cumulative loss will be; the smaller the fracture length is, the greater the loss rate and cumulative loss will be; the greater the fracture width is, the greater the loss rate and cumulative loss will be; the fluid loss rate and cumulative loss have increased significantly as the downhole pressure difference increases; fluid dynamic shearing stress has less impact on loss rate, but has certain impacts on cumulative loss; the smaller the plastic viscosity is, the greater the loss rate and cumulative loss will be. © 2017, Editorial Office of ACTA PETROLEI SINICA. All right reserved.

引用

页码：597 / 606

页数：9

共 30 条

[21] Sun W., Li Y., Fu J., Et al., Review of fracture identification with well logs and seismic data, Progress in Geophysics, 29, 3, pp. 1231-1242, (2014)
[22] Wang K., Zhang H., Zhang R., Et al., Characteristics and influencing factors of ultra-deep tight sandstone reservoir structural fracture: a case study of Keshen-2 gas field, Tarim Basin, Acta Petrolei Sinica, 37, 6, pp. 715-727, (2016)
[23] Gao S., Hu Z., Liu H., Et al., Microscopic pore characteristics of different lithological reservoirs, Acta Petrolei Sinica, 37, 2, pp. 248-256, (2016)
[24] Bai S., Cheng D., Wan J., Et al., Quantitative characterization of sandstone NMR T<sub>2</sub> spectrum, Acta Petrolei Sinica, 37, 3, pp. 382-391, (2016)
[25] Zhang J., Huang S., Cheng L., Monte carlo calculation of stable productivity of fractured directional wells in natural fracture reservoirs, Chinese Journal of Computational Physics, 31, 5, pp. 567-572, (2014)
[26] Rao H., Li J., Sun X., Using fractal theory to predict the distribution of fracture in buried-hill reservoir, Oil Geophysical Prospecting, 44, 1, pp. 98-103, (2009)
[27] Xiong J., Liu X., Liang L., Molecular simulation on the adsorption behaviors of methane in montmorillonite slit pores, Acta Petrolei Sinica, 37, 8, pp. 1021-1029, (2016)
[28] Majidi R., Miska S.Z., Yu M.J., Et al., Fracture ballooning in naturally fractured formations: Mechanism and controlling factors, (2008)
[29] Lavrov A., Newtonian fluid flow from an arbitrarily-oriented fracture into a single sink, Acta Mechanica, 186, 1-4, pp. 55-74, (2006)
[30] Bruel D., Cacas M.C., Ledoux E., Et al., Modelling storage behaviour in a fractured rock mass, Journal of Hydrology, 162, 3-4, pp. 267-278, (1994)

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