Study on the Establishment of Material Balance Model for Fractured Horizontal Well in Shale Gas Reservoir

doi:10.11885/j.issn.1674-5086.2015.08.05.02

Abstract

Abstract: To solve the difficulty in calculating the contributions of fractures, matrix, free gas, and desorbed gas to gas output, the establishment of and an analytical study on static seepage sub-regions were carried out in this work. A dynamic seepage sub-region was designed. A calculation method for reservoir water saturation under the effect of imbibition after fracturing fluid flow back was determined by calculating the propagation speed of the pressure drop and the average formation pressure in different seepage zones, with an integrated material balance equation consisting of 12 items. A total of seven seepage stages of gas well production was obtained by means of model case application and analysis. This revealed the variation law of air supply structure and proportion during different production times and the fact that it was the free gas of the matrix reservoir; and that desorbed gas was the major factor that maintained long-term production of gas wells. Establishment of the model simplified the description and solution procedure of the complex multi-dimensional seepage equation. This provides a new approach for theoretical analysis and field application, as well as a basis for in-depth understanding of and study on seepage characteristics of shale gas reservoirs.

Key words: shale gas, material balance equation, productivity p_rediction, fracture, desorption, imbibition

CLC Number:

TE332

GUO Xiaozhe, LI Jing, ZHANG Xin. Study on the Establishment of Material Balance Model for Fractured Horizontal Well in Shale Gas Reservoir[J]. 西南石油大学学报(自然科学版), 2017, 39(2): 132-138.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2015.08.05.02

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2017/V39/I2/132

References

[1] 程时清,杨秀祥,谢林峰,等. 物质平衡法分区计算定容气藏动储量和压力[J]. 石油钻探技术,2007,35(3):66-68. doi:10.3969/j.issn.1001-0890.2007.03.020 CHENG Shiqing,YANG Xiuxiang,XIE Linfeng,et al. Multi-region calculation of dynamic reserve and pressure of constant volume reservoirs using material balance[J]. Petroleum Drilling Techniques, 2007, 35(3):66-68. doi:10.3969/j.issn.1001-0890.2007.03.020
[2] 周涌沂,车雄伟. 低渗透油藏分区物质平衡方法研究[J]. 西安石油大学学报,2010,25(6):42-47. doi:10.3969/j.issn.1673-064X.2010.06.010 ZHOU Yongyi, CHE Xiongwei. Regional material balance method for low permeability reservoir[J]. Journal of Xi'an Shiyou University, 2010, 25(6):42-47. doi:10.3969/j.issn.1673-064X.2010.06.010
[3] 鲜俊,黄炳光,王焰东,等. 结合物质平衡的气井产能计算方法[J]. 内蒙古石油化工,2011,18:42-44. doi:10.3969/j.issn.1006-7981.2011.18.017 XIAN Jun, HUANG Bingguang, WANG Yandong, et al. New combined with the material balance of gas well deliverability calculation method[J]. Inner Mongolia Petrochemical Industry, 2011, 18:42-44. doi:10.3969/j.issn.1006-7981.2011.18.017
[4] SHI Juntai, ZHANG Lei. Diffusion and flow mechanisms of shale gas through matrix pores and gas production forecasting[J]. Society of Petroleum Engineers, 2013:2-19.
[5] 陈小刚,王宏图,刘宏,等. 气藏动态储量预测方法综述[J]. 特种油气藏,2009,16(2):9-12. doi:10.3969/j.issn.1006-6535.2009.02.002 CHEN Xiaogang, WANG Hongtu, LIU Hong, et al. An overview of p_rediction methods for dynamic reserves of gas reservoirs[J]. Special Oil and Gas Reservoir, 2009, 16(2):9-12. doi:10.3969/j.issn.1006-6535.2009.02.002
[6] 尚颖雪,李晓平,宋力. 考虑水溶气的页岩气藏物质平衡方程及储量计算方法[J]. 天然气地球科学,2015,26(6):1183-1189. doi:10.11764/j.issn.1672-1926.2015.06.1183 SHANG Yingxue,LI Xiaoping,SONG Li. Material Balance equation and reserves calculation method considering water soluble gas for shale gas reservoirs[J]. Natural Gas Geoscience, 2015, 26(6):1183-1189. doi:10.11764/j.issn.1672-1926.2015.06.1183
[7] 赵金洲,李志强,胡永全,等. 考虑页岩储层微观渗流的压裂产能数值模拟[J]. 天然气工业,2015,35(6):53-58. doi:10.3787/j.issn.1000-0976.2015.06.007 ZHAO Jinzhou, LI Zhiqiang, HU Yongquan, et al. Numerical simulation of productivity after fracturing with consideration to micro-seepage in shale reservoirs[J]. Natural Gas Industry, 2015, 35(6):53-58. doi:10.3787/j.issn.-1000-0976.2015.06.007
[8] 杨兆中,黄馨,覃兆勇,等. 致密油藏层内爆燃压裂缝网渗流及产能特征[J]. 天然气地球科学,2016,27(6):1092-1100. doi:10.11764/j.issn.1672-1926.2016.06.1092 YANG Zhaozhong, HUANG Xin, QIN Zhaoyong, et al. The flow and deliverability in tight oil reservoir after explosive fracturing[J]. Natural Gas Geoscience, 2016, 27(6):1092-1100. doi:10.11764/j.issn.1672-1926.2016.-06.1092
[9] 田冷,肖聪,刘明进,等. 考虑页岩气扩散的多级压裂水平井产能模型[J]. 东北石油大学学报,2014,38(5):93-101. doi:10.3969/j.issn.1006-6535.2009.02.002 TIAN Leng, XIAO Cong, LIU Mingjin, et al. Productivity model for multi-stage fractured horizontal well for shale gas reservoir taking diffusion into consideration[J]. Journal of Northeast Petroleum University, 2014, 38(5):93-101. doi:10.3969/j.issn.1006-6535.2009.02.002
[10] 朱苏阳,杜志敏,李传亮,等. 基于复合解吸理论的煤层气物质平衡方法[J]. 天然气地球科学,2016,27(6):1128-1133. doi:j.issn.1672-1926.2016.06.1128 ZHU Suyang, DU Zhimin, LI Chuanliang, et al. The coalbed methane material balanced equation based on the compound desorption[J]. Natural Gas Geoscience, 2016, 27(6):1128-1133. doi:j.issn.1672-1926.2016.06.1128
[11] 张烈辉,陈果,赵玉龙,等. 改进的页岩气藏物质平衡方程及储量计算方法[J]. 天然气工业, 2013, 33(12):66-70. doi:10.3787/j.issn.1000-0976.2013.12.009 ZHANG Liehui, CHEN Guo, ZHAO Yulong, et al. A modified material balance equation for shale gas reservoir and a calculation method of shale gas reserve[J]. Natural Gas Industry, 2013, 33(12):66-70.doi:10.3787/j.issn.1000-0976.2013.12.009
[12] 边瑞康,张金川. 页岩气成藏动力特点及其平衡方程[J]. 地学前缘,2013,20(3):255-259. BIAN Ruikang, ZHANG Jinchuan. Accumulation dynamic characteristics and the dynamic equations of shale gas[J]. Earth Science Frontiers, 2013, 20(3):255-259.
[13] 程远方,董丙响,时贤,等. 页岩气藏三孔双渗模型的渗流机理[J]. 天然气工业,2012,32(9):44-47. doi:10.3787/j.issn.1000-0976.2012.09.010 CHENG Yuanfang, DONG Bingxiang, SHI Xian, et al. Seepage mechanism of a triple-porosity/dual-permeability model for shale gas reservoir[J]. Natural Gas Industry, 2012, 32(9):44-47. doi:10.3787/j.issn.1000-0976.2012.09.010
[14] 张小涛,吴建发,冯曦,等. 页岩气藏水平井分段压裂渗流特征数值模拟[J]. 天然气工业,2013,33(3):47-52. doi:10.3787/j.issn.1000-0976.2013.03.011 ZHANG Xiaotao, WU Jianfa, FENG Xi, et al. Numerical simulation of seepage flow characteristics of multi-stage fracturing(MSF) in horizontal shale gas wells[J]. Natural Gas Industry, 2013, 33(3):47-52. doi:10.3787/j.issn.1000-0976.2013.03.011
[15] XIE Weiyang, LI Xiaoping. Research on fractured horizontal wells productivity and productivity influence in shale gas reservoir[C]. SPE 167674, 2014.
[16] GUO Chaohua, BAI Baojun. Study on gas permeability in nano pores of shale gas reservoirs[C]. SPE 167179, 2013.
[17] AUSTIN U K, ONYEKONWU M O. Advancement in material balance analysis[C]. SPE 172415, 2014.
[18] 程林松. 渗流力学[M]. 北京:石油工业出版社,2011.
[19] 张琪. 采油工程原理与设计[M]. 东营:中国石油大学出版社,2000.