Natural Gas Geoscience
Adv. search
Online submission Peer review Editorial office

Natural Gas Geoscience

Previous Articles     Next Articles

Conductivity optimization research of complex network fractures in shale reservoirs of Longmaxi Formation in Sichuan Basin

Zhang Han   

  1. Sinopec Chongqing Fuling Shale Gas Exploration and Development Co． Ltd．，Chongqing 408014，China
  • Received:2018-12-06 Revised:2019-01-27 Online:2019-07-10
  • About author:Zhang Han(1993-), Male, Assistant engineer, Master, Mainly engaged in fracturing technology of shale gas wells research. E-mail：861117270@qq.com.
  • Supported by:

    Supported by the China National Science and Technology Major Project “Fuling shale gas development demonstration project” (Grant No. 2016ZX05060).

PDF (PC)

252

Abstract: The staged fracturing technology of horizontal wells is the key technology of shale gas development，and its design needs to optimize the geometry parameters and conductivity of complex network fractures.At present，the process of using productivity prediction model to optimize the parameters of network fractures is more complex and ignores the influence of self-propped fractures on the conductivity of network fractures.According to water and electricity resembling principle，complex network fractures are assumed to consist of propped fractures and self-propped fractures，and the concept of equivalent fracture is proposed.The model for conductivity optimization of complex network fractures based on different kinds of fracture morphology is presented and relationship between conductivity of propped fractures and self-propped fractures is showed in the research.Combining reservoir and fluid parameters of Well Y1，the fracturing design of horizontal wells is carried out.The optimum sand concentration of proppant of 30/50 mesh and 40/70 mesh is 3kg/m2 and 5kg/m2 respectively，the proppant of 70/140 mesh cannot meets conductivity demands，but the conductivity of self-propped fractures meets production demands.The simulation results show that the sand ratio of Well Y1 30/50 mesh is 2.5%-3%，40/70 mesh is 3.5%-4% through Meyer，which effectively reduces the mass of proppant and achieves good economic productivity.It is worth popularizing and applying.

Key words: Shale reservoirs, Complex network of fracture, Self-propped fractures, Water and electricity similitude principle, Proppant scale

CLC Number: 

  • TE377
［1］Zhang Jinchuan，Wang Zongyu，Nie Haikuan，et al.Shale gas and its significance for exploration[J].Geoscience，2008，22(4)：640-646.
张金川，汪宗余，聂海宽，等.页岩气及其勘探研究意义[J].现代地质，2008，22(4)：640-646.
[2]Zhang Jinchuan，Xue Hui，Zhang Deming，et al.Shale gas and its reservoir formation mechanism[J].Geoscience，2003，17(4)：466.
张金川，薛会，张德明，等.页岩气及其成藏机理［J］.现代地质，2003，17(4)：466.
[3]Li Xin，Duan Shengkai，Sun Yang，et al.Latest progress in exploration and development of shale gas in the United States[J].Natural Gas Industry，2011，31(8)：124-126.
李欣，段胜楷，孙扬，等.美国页岩气勘探最新进展［J］.天然气工业，2011，31(8)：124-126.
[4]Li Xinjing，Hu Suyun，Cheng Keming.Suggestions from the development of fractured shale gas in North America[J].Petroleum Exploration and Development，2007，34(4)：392-400.
李新景，胡素云，程克明.北美裂缝性页岩气勘探开发的启示［J］.石油勘探与开发，2007，34(4)：392-400.
[5]Li Dajun，Yang Xiao，Wang Xiaolan，et al.Estimating the fracturing effect and production capacity of the Longmaxi Formation of the Lower Silurian in area W，Sichuan Basin[J].Geophysical Prospecting for Petroleum，2017，56(5)：122-132.
李大军，杨晓，王小兰，等.四川盆地W地区龙马溪组页岩气压裂效果评估和产能预测研究[J].石油物探，2017，56(5)：122-132.
[6]Zou Caineng，Dong Dazhong，Wang Yuman，et al.Shale gas in China：characteristics，challenges and prospects(Ⅱ)[J].Petroleum Exploration and Development，2016，43(2)：166-178.
邹才能，董大忠，王玉满，等.中国页岩气特征、挑战及前景(二)［J］.石油勘探与开发，2016，43(2)：166-178.
[7]Ma Yongsheng，Cai Xunyu，Zhao Peirong.China’s shale gas exploration and development：Understanding and practice[J].Petroleum Exploration and Development，2018，45(4)：561-574.
马永生，蔡勋育，赵培荣.中国页岩气勘探开发理论认识与实践[J].石油勘探与开发，2018，45(4)：561-574.
[8]Guo J C，Zhao Z H.China vigorously promoting shale gas exploration，development[J].Oil & Gas Journal，2012，110(3)：60-65.
[9]Cipolla C L，Lolon E P，Dzubin B.Evaluating stimulation effectiveness in unconventional gas reservoirs[J].SPE 124843，2009.
[10]Wu Qi，Xu Yun，Wang Tengfei，et al.The revolution of reservoir stimulation：An introduction of volume fracturing[J].Natural Gas Industry，2011，31(4)：7-12.
吴奇，胥云，王腾飞，等.增产改造理念的重大变革—体积改造技术概论［J］.天然气工业，2011，31(4)：7-12.
[11]Zhang Shicheng，Mou Songru，Cui Yong.Analysis of numerical model of shale gas fracturing[J].Natural Gas Industry，2011，31(12)：81-84.
张士诚，牟松茹，崔勇.页岩气压裂数值模型分析［J］.天然气工业，2011，31(12)：81-84.
[12]Zeng Jie，Deng Yan，Guo Jianchun，et al.A mathematical model for calculating the volume of proppant in shale vertical wells[C]∥Zeng Jie，Deng Yan，Guo Jianchun，et al.Ikatan Ahli Teknik Perminyakan Indonesia (SPE-IATPI)Asia Pacific Oil & Gas Conference and Exhibition.Nusa Dua：Society of Petroleum Engineers，2015：20-22.
[13]Gou Bo，Guo Jianchun.A novel design method for stimulated reservoir volume fracturing in shale horizontal wells[J].Geoscience，2013，27(1)：217-222.
苟波，郭建春.页岩水平井体积压裂设计的一种新方法[J].现代地质，2013，27(1)：217-222.
[14]Kamenov A，Zhu D，Hill A D，et al.Laboratory measurement of hydraulic fracture conductivities in the barnett shale[C]∥Kamenov A，Zhu D，Hill A D，et al.International Petroleum Technology Conference.Beijing：Society of Petroleum Engineers，2013：26-28.
[15]Develi K，Babadagli T.Experimental and visual analysis of single-phase flow through rough fracture replicas[J].International Journal of Rock Mechanics & Mining Sciences，2015，73：139-155.
[16]Zheng Jie.Analysis and solutions about influential parameters for hydraulic fracturing in Changning shale gas reservoirs in Sichuan Basin[J].Journal of Chongqing University of Science and Technology：Natural Sciences Edition，2017，19(3)：1-6.
郑杰.四川盆地长宁地区页岩气井压裂效果影响因素分析及对策研究[J].重庆科技学院学报：自然科学版，2017，19(3)：1-6.
[17]Mckenna J P.Where did the proppant go[C]∥Mckenna J.P.Unconventional Resources Technology Conference.Colorado：Society of Petroleum Engineers，2014：25-27.
[18]Guo Jianchun，Gou Bo，Yu Tian，et al.New design method of multi-stage hydraulic fracturing in shale horizontal well[C]∥Guo Jianchun，Gou Bo，Yu Tian，et al.Offshore Technology Conference Asia.Kuala Lumpur：Society of Petroleum Engineers，2014：25-28.
[19]Zhao Z H，He S G，Guo J C，et al.Hybrid fracturing pilot increases China’s Dagang tight oil production[J].Oil & Gas Journal，2016，114 (6)：56-61.
[1] Li Xin-jing，Chen Geng-sheng，Chen Zhi-yong，Wang Lan-sheng，Wang Yu-man，Dong Da-zhong，Lü Zong-gang，Lü Wei-ning，Wang Shu-fang，Huang Jin-liang，Zhang Chen-chen. An insight into the mechanism and evolution of shale reservoir characteristics with over-high maturity [J]. Natural Gas Geoscience, 2016, 27(3): 407-416.
[2] Chen Zhi-peng，Liang Xing，Zhang Jie-hui，Wang Gao-cheng，Liu Chen，Li Zhao-feng，Zou Chenvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv. Genesis analysis of shale reservoir overpressure of Longmaxi Formation in Zhaotong Demonstration Area,Dianqianbei Depression [J]. Natural Gas Geoscience, 2016, 27(3): 442-448.
[3] Guan Quan-zhong，Dong Da-zhong，Wang Shu-fang，Huang Jin-liang，Wang Yu-man，Zhang Chen-chen. Analyses on differences of microstructure between marineand lacustrine facies shale reservoirs [J]. Natural Gas Geoscience, 2016, 27(3): 524-531.
[4] Shang Xiao-sen，Ding Yun-hong，Yang Li-feng，Lu Yong-jun，Yan Xue-mei，Wang Yong-hui. Network fracturing technique in shale reservoirs based on weak discontinuity and fracture interaction [J]. Natural Gas Geoscience, 2016, 27(10): 1883-1891.
[5] QIU Xiao-song，YANG Bo，HU Ming-yi. Characteristics of Shale Reservoirs and Gas Content ofWufeng-Longmaxi Formation in the Middle Yangtze Region [J]. Natural Gas Geoscience, 2013, 24(6): 1274-1283.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] WANG Xian-bin, TUO Jin-cai, ZHOU Shi-xin, LI Zhen-xi, ZHANG Ming-jie, YAN Hong. THE FORMATION MECHANISM OF NATURAL AND RELATIVE TO PROBLEMS IN EARTH SCIENCE[J]. Natural Gas Geoscience, 2006, 17(1): 7 -13 .
[2] NI Jin-long, XIA Bin. GROUPING TYPES OF SLOPE-BREAK IN JIYANG DEPRESSION[J]. Natural Gas Geoscience, 2006, 17(1): 64 -68 .
[3] . A NEW METHOD FOR CALCULATING MATURITY OF OIL [J]. Natural Gas Geoscience, 2006, 17(2): 160 -162 .
[4] . [J]. Natural Gas Geoscience, 2002, 13(5-6): 8 -18 .
[5] . MICROFACIES ANALYSIS AND SUBTLE RESERVOIR EXPLORATION XINNONG REG ION, QIANJIANG DEPRESSION[J]. Natural Gas Geoscience, 2006, 17(2): 249 -255 .
[6] . [J]. Natural Gas Geoscience, 2002, 13(3-4): 40 -44 .
[7] YANG Lei,TONG Deng-ke. PRESSURE BEHAVIOR ANALYSIS FOR COAL-BED GAS FLOW THROUGH DOUBLE PERMEABILITY MEDIUM IN DEFORMED COAL-BED GAS RESERVOIR[J]. Natural Gas Geoscience, 2006, 17(3): 429 -433 .
[8] . [J]. Natural Gas Geoscience, 2002, 13(3-4): 60 -66 .
[9] YANG Xian-zhang,PENG Geng-xin,LEI Gang-lin,MA Yu-jie,HUANG Shao-ying. THE RESEARCH METHOD OF HIGH STEEP COMPLEX STRUCTURE TRAP IN KUQA DEPRESSION[J]. Natural Gas Geoscience, 2006, 17(4): 538 -542 .
[10] . [J]. Natural Gas Geoscience, 2002, 13(5-6): 38 -40 .