Abstract
Frac-packing technology has been introduced to improve the development effect of weakly consolidated sandstone. It has double effects on increasing production and sand control. However, determining operation parameters of frac-packing is the key factor due to the particularity of weakly consolidated sandstone. In order to study the mechanisms of hydraulic fracture propagation and reveal the effect of fracturing parameters on fracture morphology in weakly consolidated sandstone, finite element numerical model of fluid-solid coupling is established to carry out numerical simulation to analyze influences of mechanical characteristics, formation permeability, fracturing fluid injection rate and viscosity on fracture propagation. The result shows that lower elastic modulus is favorable for inducing short and wide fractures and controls the fracture length while Poisson ratio has almost no effect. Large injection rate and high viscosity of fracturing fluid are advantageous to fracture initiation and propagation. Suitable fractures are produced when the injection rate is approximate to 3–4 m3/min and fluid viscosity is over 100 mPa·s. The leak-off of fracturing fluid to formation is rising with the increase of formation permeability, which is adverse to fracture propagation. The work provides theoretical reference to determine the construction parameters for the frac-packing design in weakly consolidated reservoirs.
摘要
压裂充填防砂技术有效改善了疏松砂岩油藏开发效果,具有实现增产与防砂的双重效果。由于 疏松砂岩物性及力学的特殊性,其裂缝起裂与延伸机理较为复杂。为了研究水力裂缝延伸的机制,揭 示压裂参数对疏松砂岩裂缝形态的影响,利用有限元软件建立了流固耦合有限元数值模型,重点分析 了地层渗透率、压裂液黏度及排量对于裂缝延伸规律的影响。结果表明,低弹性模量有利于诱导形成 短且宽裂缝并控制裂缝长度,而泊松比几乎不产生影响。高排量和高黏度压裂液裂缝有利于裂缝的起 裂和延伸。当注入速率为3~4 m3/min 和流体黏度超过100 mPa.s 时将形成合适的裂缝。压裂液的滤失 量随着地层渗透率的增加而上升。
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References
FENG Sheng, SHI Zhen, WANG Yong. Application of high pressure pack sand control in Sebei gas field [J]. Special Oil & Gas Reservoirs, 2006, 13(3): 73–75. (in Chinese)
QU Zhan, SU Cheng, WEN Qing. Optimal design of parameters of sand control by frac-packing [J]. Special Oil & Gas Reservoirs, 2012, 19(6): 134–137. (in Chinese)
GRUBERT D M. Evolution of a hybrid fracture/gravel-pack completion: Monopod platform, trading bay field, cook inlet, Alaska [J]. SPE Production Engineering, 1991, 6(4): 395–398.
ROODHART L P, FOKKER P A, DAVIES D R, SHLYAPOBERSKY J, WONG G K. Frac and pack stimulation: Application design and field experience from the gulf of Mexico to Borneo [C]//SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1993: 507–517.
ZHANG Wei, YANG Zhi, WEI Ya. Advances in research of hydraulic fractures in unconsolidated sands [J]. Force and Application, 2014, 36(4): 396–402. (in Chinese)
WANG T T, JIANG C W, GAO Z X, LI C X. Numerical simulation of sand load applied on high-speed train in sand environment [J]. Journal of Central South University, 2017, 24(2): 442–447.
KHODAVERDIAN M, MCELFRESH P. Hydraulic fracturing stimulation in poorly consolidated sand: Mechanisms and consequences [C]//SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2000: 1–13.
CHANG H. Hydraulic fracturing in particulate materials [D]. Georgia Institute of Technology, 2004.
DONG Y, DE PATER C J. Observation and modeling of the hydraulic fracture tip in sand [C]//The 42nd US Rock Mechanics Symposium (USRMS). California: American Rock Mechanics Association, 2008: Paper ARMA 08–377.
GERMANOVICH L N, HURT R S, AYOUB J A. Experimental study of hydraulic fracturing in unconsolidated materials [J]. Tetrahedron Letters, 2012, 49(5): 888–892.
GOLOVIN E, JASAREVIC H, CHUDNOVSKY A, DUDLEY J W, WONG G K. Observation and characterization of hydraulic fracture in cohesionless sand [C]//44th US Rock Mechanics Symposium and 5th USCanada Rock Mechanics Symposium. Utah, USA: American Rock Mechanics Association, 2010: 58–62.
ZHOU Jia, DONG Yu, de PETER C J, ZITHA P L J. Experimental study of the impact of shear dilation and fracture behavior during polymer injection for heavy oil recovery in unconsolidated reservoirs [C]//Canadian Unconventional Resources and International Petroleum Conference. Alberta, Canada: Society of Petroleum Engineers, 2010: 1–12.
MANCHANDA R, OLSON J E, SHARMA M M. Permeability anisotropy and dilation due to shear failure in poorly consolidated sands [C]//SPE 152432, Hydraulic Fracturing Technology Conference. Woolands, 2012.
HAIMSON B, FAIRHURST C. Initiation and extension of hydraulic fractures in rocks [J]. Society of Petroleum Engineers Journal, 1967, 7(3): 310–318.
JIN Yan, ZHANG Xu, CHEN Mian. Initiation pressure models for hydraulic fracturing of vertical wells in naturally fractured formation [J]. Acta Petrolei Sinica, 2005, 26(6): 113–114.
REN Lan, ZHAO Jin, HU Yong. Numerical calculation of rock breakdown pressure during hydraulic fracturing process [J]. Rock Mechanics and Engineering, 2009, 28 (s2): 3417–3422. (in Chinese)
CARRIER B, GRANET S. Numerical modeling of hydraulic fracture problem in permeable medium using cohesive zone model [J]. Engineering Fracture Mechanics, 2012, 79: 312–328.
LAI X D, AN F C, WANG Y H, ZHU H Y, JIN X C. Coupled flow, stress and damage modelling of interactions between hydraulic fractures and natural fractures in shale gas reservoirs [J]. International Journal of Oil, Gas and Coal Technology, 2016, 13(4): 359–390.
ZHANG F, ZHU H, ZHOU H, GUO J, HUANG B. Discreteelement-method/computational-fluid-dynamics coupling simulation of proppant embedment and fracture conductivity after hydraulic fracturing [J]. Spe Journal, 2017, 22(2): 632–644.
ZHANG G M, LIU H, ZHANG J, WU HA, WANG X X. Three-dimensional finite element simulation and parametric study for horizontal well hydraulic fracture [J]. Journal of Petroleum Science & Engineering, 2010, 72(3): 310–317.
CHEN Z, BUNGER A P, ZHANG X. Cohesive zone finite element-based modeling of hydraulic fractures [J]. Acta Mechanica Solida Sinica, 2009, 22(5): 443–452.
DO B C, LIU W, YANG Q D, SU X Y. Improved cohesive stress integration schemes for cohesive zone elements [J]. Engineering Fracture Mechanics, 2013, 107(7): 14–28.
ZHU H Y, ZHAO X, GUO J C, JIN X, AN F. Coupled flowstress-damage simulation of deviated-wellbore fracturing in hard-rock [J]. Journal of Natural Gas Science and Engineering, 2015, 26: 711–724.
GUO J, ZHAO X, ZHU H, ZHANG X, PAN R. Numerical simulation of interaction of hydraulic fracture and natural fracture based on the cohesive zone finite element method [J]. Journal of Natural Gas Science & Engineering, 2015, 25: 180–188.
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Foundation item: Project(2016ZX05058-002-006) supported by National Science and Technology Major Projects of China; Project(2018CXTD346) supported by Innovative Research Team Program of Natural Science Foundation of Hainan Province, China
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Lin, H., Deng, Jg., Liu, W. et al. Numerical simulation of hydraulic fracture propagation in weakly consolidated sandstone reservoirs. J. Cent. South Univ. 25, 2944–2952 (2018). https://doi.org/10.1007/s11771-018-3964-8
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DOI: https://doi.org/10.1007/s11771-018-3964-8