A STUDY ON THE INFLUENCE RULE OF THE FRACTURE CHARACTERISTICS ON ROCK SEEPAGE CHARACTERISTICS

ZHOU Hanguo; GUO Jianchun; LI Jing; FAN Zuosong; GAO Shuai; WANG Chang; LIU Zhen

2017 Vol. 23, No. 4

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ZHOU Hanguo, GUO Jianchun, LI Jing, FAN Zuosong, GAO Shuai, WANG Chang, LIU Zhen. A STUDY ON THE INFLUENCE RULE OF THE FRACTURE CHARACTERISTICS ON ROCK SEEPAGE CHARACTERISTICS[J]. Journal of Geomechanics, 2017, 23(4): 531-539.

Citation:

A STUDY ON THE INFLUENCE RULE OF THE FRACTURE CHARACTERISTICS ON ROCK SEEPAGE CHARACTERISTICS

1.
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China
2.
Manage Center of Oil and Gas Exploration of SINOPEC Shengli Oilfield Company, Dongying 257000, Shandong, China
3.
Research Institute of Geological Mechanics and Engineering, China University of Petroleum, Qingdao 266580, Shandong, China
4.
Qingdao Metro Line Eight Co., Ltd., Qingdao 266109, Shandong, China

Received Date: 20 February 2017

Publish Date: 25 August 2017

Abstract

Abstract

Fracture is the main reservoir space and fluid seepage channel in oil and gas reservoirs, which affects hydrocarbon migration directly as an important indicator of oil and gas exploration and development. In this study, the Ren 10 well in Renqiu Oilfield of the Jizhong depression was taken as an example, the influence rule of fracture width and fracture surface roughness on rock seepage characteristics was studied in this work by numerical simulation. The results show as follows: 1) When fracture width is small, fluid pressure in pore distributes as a fan and only in a small range of the entrance; pressure distribution curve in fracture is tangent function type, and fluid and flow velocity are both relatively small in fracture and pore. With the increase of fracture width, fluid pressure in pore increases gradually; pressure distribution curve in fracture gradually changes to linear type. Moreover, the fluid and flow velocity decrease first and then tend to be stable at the entrance while increase first and then tend to be stable in fracture. 2) The influence of fracture surface roughness on rock seepage characteristics varies with fracture width. When fracture width gets bigger, the influence of fracture surface roughness gets greater on the distribution of fluid pressure. With the increase of fracture surface roughness, flow velocity in pore gradually increases while that in fracture decreases. 3) With the increase of fracture width, the main controlling factor affecting fluid flow in fracture changes from fracture width to fracture surface roughness.
- fractured rocks /
- seepage characteristics /
- fracture width /
- fracture surface roughness /
- numerical simulation

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References

[1]	周宏伟, 谢和平.岩石节理张开度的分形描述[J].水文地质工程地质, 1999, 26(1): 1~4. Google Scholar ZHOU Hongwei, XIE Heping. Fractal description of the average opening of a rock joint[J]. Hydrogeology and Engineering Geology, 1999, 26(1): 1~4. Google Scholar
[2]	宋良. 裂隙含沙渗流模型与应用研究[D]. 徐州: 中国矿业大学, 2013. Google Scholar SONG Liang. Research on the model of flow in rock fractures with injected sand and its application[D]. Xuzhou: China University of Mining and Technology, 2013. Google Scholar
[3]	刘才华, 陈从新, 付少兰.二维应力作用下岩石单裂隙渗流规律的实验研究[J].岩石力学与工程学报, 2002, 21(8): 1194~1198. Google Scholar LIU Caihua, CHEN Congxin, FU Shaolan. Testing study on seepage characteristic of a single rock fracture under two-dimensional stresses[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(8): 1194~1198. Google Scholar
[4]	于洪丹, 陈飞飞, 陈卫忠, 等.含裂隙岩石渗流力学特性研究[J].岩石力学与工程学报, 2012, 31(S1): 2788~2795. Google Scholar YU Hongdan, CHEN Feifei, CHEN Weizhong, et al. Research on permeability of fractured rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(S1): 2788~2795. Google Scholar
[5]	许孝臣, 盛金昌.渗流-应力-化学耦合作用下单裂隙渗透特性[J].辽宁工程技术大学学报(自然科学版), 2009, 28( Google Scholar S): 270~272. XU Xiaochen, SHENG Jinchang. Permeability of single fracture under coupled hydrological-mechanical-chemical action[J]. Journal of Liaoning Technical University (Natural Science), 2009, 28(S): 270~272. Google Scholar
[6]	曾亿山, 卢德唐, 曾清红, 等.单裂隙流-固耦合渗流的试验研究[J].实验力学, 2005, 20(1): 10~16. Google Scholar ZENG Yishan, LU Detang, ZENG Qinghong, et al. Experimental study on coupling of flow-stress within a single fracture[J]. Journal of Experimental Mechanics, 2005, 20(1): 10~16. Google Scholar
[7]	刘泉声, 刘学伟.多场耦合作用下岩体裂隙扩展演化关键问题研究[J].岩土力学, 2014, 35(2): 305~320. Google Scholar LIU Quansheng, LIU Xuewei. Research on critical problem for fracture network propagation and evolution with multifield coupling of fractured rock mass[J]. Rock and Soil Mechanics, 2014, 35(2): 305~320. Google Scholar
[8]	王玉芳, 杜建军, 牛新年.碳酸盐岩酸压裂缝导流能力随缝长变化规律研究[J].地质力学学报, 2015, 21(4): 546~554. Google Scholar WANG Yufang, DU Jianjun, NIU Xinnian. Study on acid fracture conductivity with length variation in carbonate reservoir[J]. Journal of Geomechanics, 2015, 21(4): 546~554. Google Scholar
[9]	王永辉, 李永平, 程兴生, 等.高温深层碳酸盐岩储层酸化压裂改造技术[J].石油学报, 2012, 33( doi: 10.7623/syxb2012S2017 CrossRef Google Scholar S2): 166~173. WANG Yonghui, LI Yongping, CHENG Xingsheng, et al. A new acid fracturing technique for carbonate reservoirs with high-temperature and deep layer[J]. Acta Petrolei Sinica, 2012, 33(S2): 166~173. doi: 10.7623/syxb2012S2017 CrossRef Google Scholar
[10]	王卫星, 杨记明.一种基于图像处理的岩石裂隙粗糙度几何信息算法[J].重庆邮电大学学报(自然科学版), 2010, 22(4): 454~457. doi: 10.3979/j.issn.1673-825X.2010.04.013 CrossRef Google Scholar WANG Weixing, YANG Jiming. A geometric information on roughness of rock fractures based on image processing[J]. Journal of Chongqing University of Posts and Telecommunications (Natural Science Edition), 2010, 22(4): 454~457. doi: 10.3979/j.issn.1673-825X.2010.04.013 CrossRef Google Scholar
[11]	郑少河, 赵阳升, 段康廉.三维应力作用下天然裂隙渗流规律的实验研究[J].岩石力学与工程学报, 1999, 18(2): 133~136. Google Scholar ZHENG Shaohe, ZHAO Yangsheng, DUAN Kanglian. An experimental study on the permeability law of natural fracture under 3-D stresses[J]. Chinese Journal of Rock Mechanics and Engineering, 1999, 18(2): 133~136. Google Scholar
[12]	叶源新, 刘光廷.三维应力作用下砂砾岩孔隙型渗流[J].清华大学学报(自然科学版), 2007, 47(3): 335~339. Google Scholar YE Yuanxin, LIU Guangting. Porous seepage in calcirudite rock with 3-D stresses[J]. Journal of Tsinghua University (Science & Technology), 2007, 47(3): 335~339. Google Scholar
[13]	董平川.变形介质流固耦合渗流的数值模型及其应用[J].地质力学学报, 2005, 11(3): 273~277. Google Scholar DONG Pingchuan. Numerical model of fully coupled fluid-solid seepage in a deformable porous medium and its applications[J]. Journal of Geomechanics, 2005, 11(3): 273~277. Google Scholar
[14]	熊祥斌, 张楚汉, 王恩志.岩石单裂隙稳态渗流研究进展[J].岩石力学与工程学报, 2009, 28(9): 1839~1847. Google Scholar XIONG Xiangbin, ZHANG Chuhan, WANG Enzhi. A review of steady state seepage in a single fracture of rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(9): 1839~1847. Google Scholar
[15]	颜其彬, 陈明江, 汪娟, 等.碳酸盐岩储层渗透率与孔隙度、喉道半径的关系[J].天然气工业, 2015, 35(6): 30~36. Google Scholar YAN Qibin, CHEN Mingjiang, WANG Juan, et al. Correlation among permeability, porosity and pore throat radius of carbonate reservoirs[J]. Natural Gas Industry, 2015, 35(6): 30~36. Google Scholar
[16]	Baghbanan A, Jing L R. Stress effects on permeability in a fractured rock mass with correlated fracture length and aperture[J]. International Journal of Rock Mechanics and Mining Sciences, 2008, 45(8): 1320~1334. doi: 10.1016/j.ijrmms.2008.01.015 CrossRef Google Scholar