Numerical Simulation on Fracture Propagation in Conglomerate in Mahu Sag

doi:10.7657/XJPG20220215

Abstract

Abstract:

For the conglomerate in the Mahu sag, the law and controlling factors of fracture propagation are unclear. A numerical simulation model for conglomerate was constructed to analyze the law of fracture propagation in conglomerate with different material properties under different loading modes. The results show that the higher the gravel content, the lower the cementation strength and the greater the relative strength of gravel to matrix, the more complex the fractures created in the conglomerate. Influenced by loading mode, the most complex fractures are created in the conglomerate under the combined action of tensile and shear loads. The attracting and shielding effects of gravel on conglomerate fractures promote the formation of complex fracture network in the conglomerate.

Key words: Mahu sag, conglomerate, fracture, numerical simulation, model, propagation law, multiphase medium, continuum-based discrete element method

CLC Number:

TE357

LIU Pengyu, JIANG Qingping, SHEN Yinghao, ZHAO Tingfeng, GE Hongkui, ZHOU Dong. Numerical Simulation on Fracture Propagation in Conglomerate in Mahu Sag[J]. Xinjiang Petroleum Geology, 2022, 43(2): 227-234.

Figures/Tables 10

Fig. 1.

Fig. 2.

Fig. 3.

Fig. 4.

Fig. 5.

Fig. 6.

Fig. 7.

Fig. 8.

Fig. 9.

Fig. 10.

References 25

[1]	于兴河, 瞿建华, 谭程鹏, 等. 玛湖凹陷百口泉组扇三角洲砾岩岩相及成因模式[J]. 新疆石油地质, 2014, 35(6):619-627.
	YU Xinghe, QU Jianhua, TAN Chengpeng, et al. Conglomerate lithofacies and origin models of fan deltas of Baikouquan formation in Mahu sag,Junggar basin[J]. Xinjiang Petroleum Geology, 2014, 35(6):619-627.
[2]	张昌民, 王绪龙, 朱锐, 等. 准噶尔盆地玛湖凹陷百口泉组岩石相划分[J]. 新疆石油地质, 2016, 37(5):606-614.
	ZHANG Changmin, WANG Xulong, ZHU Rui, et al. Litho-facies classification of Baikouquan formation in Mahu sag,Junggar basin[J]. Xinjiang Petroleum Geology, 2016, 37(5):606-614.
[3]	陈超峰, 王佳, 俞天喜, 等. 玛湖凹陷乌尔禾组砾岩储集层裂缝支撑剂运移规律[J]. 新疆石油地质, 2021, 42(5):559-564.
	CHEN Chaofeng, WANG Jia, YU Tianxi, et al. Proppant migration law in fractures of conglomerate reservoirs of Wuerhe formation in Mahu sag[J]. Xinjiang Petroleum Geology, 2021, 42(5):559-564.
[4]	刘向君, 熊健, 梁利喜, 等. 玛湖凹陷百口泉组砂砾岩储集层岩石力学特征与裂缝扩展机理[J]. 新疆石油地质, 2018, 39(1):83-91.
	LIU Xiangjun, XIONG Jian, LIANG Lixi, et al. Rock mechanical characteristics and fracture propagation mechanism of sandy conglomerate reservoirs in Baikouquan formation of Mahu sag[J]. Xinjiang Petroleum Geology, 2018, 39(1):83-91.
[5]	何小东, 马俊修, 刘刚, 等. 玛湖油田砾岩储集层岩石力学分析及缝网评价[J]. 新疆石油地质, 2019, 40(6):701-707.
	HE Xiaodong, MA Junxiu, LIU Gang, et al. Analysis of rock mechanics and assessments of hydraulic fracture network in conglomerate reservoirs of Mahu oilfield[J]. Xinjiang Petroleum Geology, 2019, 40(6):701-707.
[6]	李升芳, 李太伟, 王进涛, 等. 砂砾岩储层裂缝摩阻测试及应用[J]. 科学技术与工程, 2015, 15(19):127-130.
	LI Shengfang, LI Taiwei, WANG Jintao, et al. The performance test and application of the fracture fiction in glutenite reservoir[J]. Science Technology and Engineering, 2015, 15(19):127-130.
[7]	李连崇, 李根, 孟庆民, 等. 砂砾岩水力压裂裂缝扩展规律的数值模拟分析[J]. 岩土力学, 2013, 34(5):1 501-1 507.
	LI Lianchong, LI Gen, MENG Qingmin, et al. Numerical simulation of propagation of hydraulic fractures in glutenite formation[J]. Rock and Soil Mechanics, 2013, 34(5):1 501-1 507.
[8]	鞠杨, 杨永明, 陈佳亮, 等. 低渗透非均质砂砾岩的三维重构与水压致裂模拟[J]. 科学通报, 2016, 61(1):82-93.
	JU Yang, YANG Yongming, CHEN Jialiang, et al. 3D reconstruction of low-permeability heterogeneous glutenites and numerical simulation of hydraulic fracturing behavior[J]. Chinese Science Bulletin, 2016, 61(1):82-93.
[9]	赵益忠, 曲连忠, 王幸尊, 等. 不同岩性地层水力压裂裂缝扩展规律的模拟实验[J]. 中国石油大学学报(自然科学版), 2007, 31(3):63-66.
	ZHAO Yizhong, QU Lianzhong, WANG Xingzun, et al. Simulation experiment on prolongation law of hydraulic fracture for different lithologic formations[J]. Journal of China University of Petroleun(Edition of Natural Science), 2007, 31(3):63-66.
[10]	李宁, 张士诚, 马新仿, 等. 砂砾岩储层水力裂缝扩展规律试验研究[J]. 岩石力学与工程学报, 2017, 36(10):2 383-2 392.
	LI Ning, ZHANG Shicheng, MA Xinfang, et al. Experimental study on the propagation mechanism of hydraulic fracture in glutenite formations[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(10):2 383-2 392.
[11]	罗攀, 李勇明, 江有适, 等. 砂砾岩水力裂缝延伸路径模拟研究[J]. 油气地质与采收率, 2013, 20(5):103-106.
	LUO Pan, LI Yongming, JIANG Youshi, et al. Research on micro-morphology characteristics of hydraulic fractures for conglomerate reservoir[J]. Petroleum Geology and Recovery Efficiency, 2013, 20(5):103-106.
[12]	孟庆民, 张士诚, 郭先敏, 等. 砂砾岩水力裂缝扩展规律初探[J]. 石油天然气学报(江汉石油学院学报), 2010, 32(4):119-123.
	MENG Qingmin, ZHANG Shicheng, GUO Xianmin, et al. A primary investigation on propagation mechanism for hydraulic fractures in glutenite formation[J]. Journal of Oil and Gas Technology, 2010, 32(4):119-123.
[13]	余东合, 徐康泰, 车航, 等. 基于细观损伤多相耦合的砂砾岩水力压裂裂缝扩展数值模拟[J]. 石油钻采工艺, 2016, 38(3):352-358.
	YU Donghe, XU Kangtai, CHE Hang, et al. Numerical simulation on hydraulic fracture propagation in glutenite reservoir based on microscopic damage multiphase coupling[J]. Oil Drilling & Production Technology, 2016, 38(3):352-358.
[14]	王硕, 覃建华, 杨新平, 等. 玛湖地区致密砾岩人工裂缝垂向延伸机理应力模拟[J]. 新疆石油地质, 2020, 41(2):193-198.
	WANG Shuo, QIN Jianhua, YANG Xinping, et al. Stress simulation of vetical hydraulic fracture propatation mechanism in tight conglomorate reserviors of Mahu area[J]. Xinjiang Petroleum Geology, 2020, 41(2):193-198.
[15]	LI Shihai, ZHAO Manhong, WANG Yuannian, et al. A new numerical method for DEM-block and particle model[J]. International Journal of Rock Mechanics & Mining Sciences, 2004, 41:436.
[16]	冯春, 李世海, 姚再兴. 基于连续介质力学的块体单元离散弹簧法研究[J]. 岩石力学与工程学报, 2010, 29(增刊1):2 690-2 704.
	FENG Chun, LI Shihai, YAO Zaixing. Study of block-discrete-spring method based on continuum mechanics[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(Supp.1):2 690-2 704.
[17]	范永波, 李世海, 侯岳峰, 等. 不同边界条件下土石混合体破坏机制研究[J]. 水文地质工程地质, 2013, 40(3):48-51.
	FAN Yongbo, LI Shihai, HOU Yuefeng, et al. A study of the failure mechanism of rock and soil associate under different boundary conditions[J]. Hydrogeology & Engineering Geology, 2013, 40(3):48-51.
[18]	UNGER J F, ECKARDT S, KONKE C. Modelling of cohesive crack growth in concrete structures with the extended finite element method[J]. Computer Methods in Applied Mechanics and Engineering, 2007, 196:4 087-4 100. doi: 10.1016/j.cma.2007.03.023
[19]	AMBATI M, GERASIMOV T, LORENZIS L D. A review on phase-field models of brittle fracture and a new fast hybrid formulation[J]. Computational Mechanics, 2015, 55:383-405. doi: 10.1007/s00466-014-1109-y
[20]	杜修力, 金浏, 黄景琦. 基于扩展有限元法的混凝土细观断裂破坏过程模拟[J]. 计算力学学报, 2012, 29(6):940-947.
	DU Xiuli, JIN Liu, HUANG Jingqi. Simulation of meso-fracture process of concrete using the extended finite element method[J]. Chinese Journal of Computational Mechanics, 2012, 29(6):940-947.
[21]	周辉, 孟凡震, 张传庆, 等. 基于应力-应变曲线的岩石脆性特征定量评价方法[J]. 岩石力学与工程学报, 2014, 33(6):1 114-1 122.
	ZHOU Hui, MENG Fanzhen, ZHANG Chuanqing, et al. Quantitative evaluation of rock brittleness based on stress-strain curve[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(6):1 114-1 122.
[22]	熊健, 唐勇, 刘向君, 等. 应用微CT技术研究砂砾岩孔隙结构特征:以玛湖凹陷百口泉组储集层为例[J]. 新疆石油地质, 2018, 39(2):236-243.
	XIONG Jian, TANG Yong, LIU Xiangjun, et al. Using micro-CT scanning technology to study characteristics of pore structures in sandy conglomerate:a case from Baikouquan formation in Mahu sag,Junggar basin[J]. Xinjiang Petroleum Geology, 2018, 39(2):236-243.
[23]	徐世烺. 混凝土断裂力学[M]. 北京: 科学出版社, 2011.
	XU Shilang. Fracture mechanics of concrete[M]. Beijing: Science Press, 2011.
[24]	HILLERBORG A, MODEER M, PETERSSON P-E. Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements[J]. Cement and Conrete Research, 1976, 6(1):773-782.
[25]	BAZANT Z P, OH B H. Crack band theory for fracture of concrete[J]. Materials and Structures, 1983, 16:155-177.