页岩气储层井周孔隙压力传递数值分析方法

doi:10.7623/syxb201605010

石油学报 ›› 2016, Vol. 37 ›› Issue (5): 660-671.DOI: 10.7623/syxb201605010

页岩气储层井周孔隙压力传递数值分析方法

马天寿^1,2, 陈平^1,2, 王旭东¹, 郭昭学^1,2, 刘智强²

1. 西南石油大学油气藏地质及开发工程国家重点实验室四川成都 610500;
2. 西南石油大学石油与天然气工程学院四川成都 610500

收稿日期:2015-10-26 修回日期:2016-02-16 出版日期:2016-05-25 发布日期:2016-06-06
通讯作者: 马天寿,男,1987年12月生,2009年获西南石油大学学士学位,2015年获西南石油大学博士学位,现为西南石油大学石油与天然气工程学院讲师,主要从事油气井工程教学与科研工作。Email:matianshou@126.com
作者简介:马天寿,男,1987年12月生,2009年获西南石油大学学士学位,2015年获西南石油大学博士学位,现为西南石油大学石油与天然气工程学院讲师,主要从事油气井工程教学与科研工作。Email:matianshou@126.com
基金资助:
国家重点基础研究发展计划(973)项目(2013CB228003);四川省国际科技合作与交流项目(2016HH0001)和四川省科技支撑计划项目(2015SZ0003)资助。

Numerical analysis method of pore pressure propagation around the borehole for shale gas reservoirs

Ma Tianshou^1,2, Chen Ping^1,2, Wang Xudong¹, Guo Zhaoxue^1,2, Liu Zhiqiang²

1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Sichuan Chengdu 610500, China;
2. School of Oil and Natural Gas Engineering, Southwest Petroleum University, Sichuan Chengdu 610500, China

Received:2015-10-26 Revised:2016-02-16 Online:2016-05-25 Published:2016-06-06

摘要/Abstract

摘要：

由于页岩基质致密、层理和裂隙发育、富含黏土矿物,使得页岩具有超低渗透、各向异性和水敏等特性,钻井液与页岩接触产生的水化作用引起自由水在页岩中传输,从而导致井周孔隙压力不断变化,但现有方法并未考虑页岩物性特征的影响。为此,基于非平衡热动力学理论,建立了各向异性页岩的井周压力传递数学模型及有限差分求解方法,分析了井周压力分布特征、传递规律及影响因素。结果表明,各向异性页岩井周压力分布与井周角有关,并以主方向呈对称分布;钻井液化学作用对井周压力传递的影响显著,低浓度钻井液情况下井壁附近孔隙压力显著增加,而高浓度钻井液情况下却显著降低,井周压力传递集中在1倍井径范围内;井周孔隙压力的增加不利于井壁稳定,而孔隙压力的降低有利于井壁稳定;溶质扩散系数越小、膜效率系数越大、水力扩散系数越小,则井壁附近孔隙压力变化幅度越大;反之,孔隙压力变化幅度越小。该方法比常规方法更符合实际,且更加实用。

关键词: 页岩气, 井壁稳定, 孔隙压力, 压力传递, 各向异性

Abstract:

Because of tight matrix, well-developed beddings and fissures as well as rich clay minerals, shale has such properties as ultra-low permeability, anisotropy, water sensitivity and etc. The hydration due to the contact between the drilling fluid and shale will cause free water transporting in shale, ultimately leading to constant changes in pore pressure around the borehole. However, the influences from physical characteristics of shale are not considered in the existing methods. Therefore, based on non-equilibrium thermodynamic theory, the mathematical model of pressure propagation around the borehole in anisotropic shale was established, as well as the finite difference solution method. Finally, the distribution characteristics, propagation laws and influence factors of pore pressure around the borehole were analyzed. The results indicate that the pressure distribution of anisotropic shale around the borehole is related to the angle of borehole circumference, presenting a symmetrical distribution along the main direction. The chemical reaction of drilling fluid has an obvious influence on the propagation of pore pressure around the borehole. If using low-concentration drilling fluid, the pore pressure adjacent to borehole wall is significantly increased, but significantly decreased when using high-concentration drilling fluid; the propagation of pore pressure around the borehole is concentrated within a range that is 1 times borehole diameter. Pore pressure increase around the borehole is detrimental to wellbore stability, while a decrease in pore pressure is beneficial to wellbore stability. The smaller the solute diffusion coefficient is, the larger the membrane efficiency is, and the smaller the hydraulic diffusion coefficient is, the larger the change amplitude of pore pressure around the borehole wall is; contrarily, the change amplitude of pore pressure around the borehole wall is smaller.This method is different from conventional methods, but more realistic and practical.

Key words: shale gas, wellbore stability, pore pressure, pressure propagation, anisotropy

中图分类号:

TE21

马天寿, 陈平, 王旭东, 郭昭学, 刘智强. 页岩气储层井周孔隙压力传递数值分析方法[J]. 石油学报, 2016, 37(5): 660-671.

Ma Tianshou, Chen Ping, Wang Xudong, Guo Zhaoxue, Liu Zhiqiang. Numerical analysis method of pore pressure propagation around the borehole for shale gas reservoirs[J]. Acta Petrolei Sinica, 2016, 37(5): 660-671.

参考文献

[1] 梁涛,常毓文,许璐,等.北美非常规油气蓬勃发展十大动因及对区域油气供需的影响[J].石油学报,2014,35(5):890-900.
Liang Tao,Chang Yuwen,Xu Lu,et al.Top ten causes of unconventional oil and gas resources boom in North America and its influence on regional supply and demand[J].Acta Petrolei Sinica,2014,35(5):890-900.
[2] 姚军,孙海,黄朝琴,等.页岩气藏开发中的关键力学问题[J].中国科学:物理学力学天文学,2013,43(12):1527-1547.
Yao Jun,Sun Hai,Huang Zhaoqin,et al.Key mechanical problems in the development of shale gas reservoirs[J].Scientia Sinica Physica,Mechanica & Astronomica, 2013,43(12):1527-1547.
[3] 王红岩,刘玉章,董大忠,等.中国南方海相页岩气高效开发的科学问题[J].石油勘探与开发,2013,40(5):574-579.
Wang Hongyan,Liu Yuzhang,Dong Dazhong,et al.Scientific issues on effective development of marine shale gas in southern China[J].Petroleum Exploration and Development,2013,40(5):574-579.
[4] 马天寿,陈平.基于CT扫描技术研究页岩水化细观损伤特性[J].石油勘探与开发,2014,41(2):227-233.
Ma Tianshou,Chen Ping.Study of meso-damage characteristics of shale hydration based on CT scanning technology[J].Petroleum Exploration and Development,2014,41(2):227-233.
[5] Ma Tianshou,Yang Chunhe,Chen Ping,et al.On the damage constitutive model for hydrated shale using CT scanning technology[J].Journal of Natural Gas Science and Engineering,2016,28:204-214.
[6] Yan Chuanliang,Deng Jingen,Yu Baohua,et al.Wellbore stability analysis and its application in the Fergana Basin,central Asia[J].Journal of Geophysics and Engineering, 2014,11(1):015001.
[7] 温航,陈勉,金衍,等.硬脆性泥页岩斜井段井壁稳定力化耦合研究[J].石油勘探与开发,2014,41(6):748-754.
Wen Hang,Chen Mian,Jin Yan,et al.A chemo-mechanical coupling model of deviated borehole stability in hard brittle shale[J].Petroleum Exploration and Development,2014,41(6):748-754.
[8] Ma Tianshou,Chen Ping,Yang Chunhe,et al.Wellbore stability analysis and well path optimization based on the breakout width model and Mogi-Coulomb criterion[J].Journal of Petroleum Science and Engineering,2015,135:678-701.
[9] Aadnoy B S,Ong S.Introduction to special issue on borehole stability[J].Journal of Petroleum Science and Engineering,2003,38(3/4):79-82.
[10] Zeynali M E.Mechanical and physico-chemical aspects of wellbore stability during drilling operations[J].Journal of Petroleum Science and Engineering,2012,82/83:120-124.
[11] 王倩,王刚,蒋宏伟,等.泥页岩井壁稳定耦合研究[J].断块油气田,2012,19(4):517-521.
Wang Qian,Wang Gang,Jiang Hongwei,et al.Study on shale wellbore stability coupling[J].Fault-Block Oil and Gas Field,2012,19(4):517-521.
[12] 石秉忠,夏柏如,林永学,等.硬脆性泥页岩水化裂缝发展的CT成像与机理[J].石油学报,2012,33(1):137-142.
Shi Bingzhong,Xia Bairu,Lin Yongxue,et al.CT imaging and mechanism analysis of crack development by hydration in hard-brittle shale formations[J].Acta Petrolei Sinica,2012,33(1):137-142.
[13] Yuan Weina,Li Xiao,Pan Zhejun,et al.Experimental investigation of interactions between water and a lower Silurian Chinese shale[J].Energy & Fuels,2014,28(8):4925-4933.
[14] Wen Hang,Chen Mian,Jin Yan,et al.Water activity characteristics of deep brittle shale from Southwest China[J].Applied Clay Science,2015,108:165-172.
[15] Yew C H,Chenevert M E,Wang C L,et al.Wellbore stress distribution produced by moisture adsorption[J].SPE Drilling Engineering,1990,5(4):311-316.
[16] 陈勉,金衍,张广清.石油工程岩石力学[M].北京:科学出版社,2008.
Chen Mian,Jin Yan,Zhang Guangqing.Petroleum related rock mechanics[M].Beijing:Science Press,2008.
[17] Hale A H,Mody F K,Salisbury D P.The influence of chemical potential on wellbore stability[J].SPE Drilling & Completion,1993,8(3):207-216.
[18] Mody F K,Hale A H.Borehole-stability model to couple the mechanics and chemistry of drilling-fluid/shale interactions[J].Journal of Petroleum Technology,1993,45(11),1093-1101.
[19] Bol G M,Wong S W,Davidson C J,et al.Borehole stability in shales[J].SPE Drilling & Completion,1994,9(2):87-94.
[20] Van Oort E,Hale A H,Mody F K,et al.Transport in shales and the design of improved water-based shale drilling fluids[J].SPE Drilling & Completion,1996,11(3):137-146.
[21] Van Oort E.On the physical and chemical stability of shales[J].Journal of Petroleum Science and Engineering,2003,38(3/4):213-235.
[22] Tan C P,Richards B G,Rahman S S.Managing physico-chemical wellbore instability in shales with the chemical potential mechanism[R].SPE 36971,1996.
[23] Lomba R F T,Chenevert M E,Sharma M M.The ion-selective membrane behavior of native shales[J].Journal of Petroleum Science and Engineering,2000,25(1/2):9-23.
[24] 程远方,王京印,赵益忠,等.多场耦合作用下泥页岩地层强度分析[J].岩石力学与工程学报,2006,25(9):1912-1916.
Cheng Yuanfang,Wang Jingyin,Zhao Yizhong,et al.Strength analysis of formation rock for porous media coupled with mechanical-chemical effects[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(9):1912-1916.
[25] Yu M,Chen G,Chenevert M E,et al.Chemical and thermal effects on wellbore stability of shale formations[R].SPE 71366,2001.
[26] Yu Mengjiao.Chemical and thermal effects on wellbore stability of shale formations[D].Austin:University of Texas at Austin,2002.
[27] Yu Mengjiao,Chenevert M E,Sharma M M.Chemical-mechanical wellbore instability model for shales:accounting for solute diffusion[J].Journal of Petroleum Science and Engineering,2003,38(3/4):131-143.
[28] Chen Guizhong,Chenevert M E,Sharma M M,et al.A study of wellbore stability in shales including poroelastic,chemical,and thermal effects[J].Journal of Petroleum Science and Engineering,2003,38(3/4):167-176.
[29] Chen Guizhong,Ewy R T,Yu Mengjiao.Analytic solutions with ionic flow for a pressure transmission test on shale[J].Journal of Petroleum Science and Engineering,2010,72(1/2):158-165.
[30] Zhang J,Al-Bazali T M,Chenevert M E,et al.Factors controlling the membrane efficiency of shales when interacting with water-based and oil-based muds[J].SPE Drilling & Completion,2008,23(2):150-158.
[31] 马天寿.页岩气水平井井眼坍塌失稳机理研究[D].成都:西南石油大学,2015.
Ma Tianshou.Research on the mechanisms of borehole collapse instability for horizontal wells in shale gas reservoirs[D].Chengdu:Southwest Petroleum University,2015.
[32] Dokhani V,Yu Mengjiao,Miska S Z,et al.The effects of anisotropic transport coefficients on pore pressure in shale formations[J].Journal of Energy Resources Technology, 2015,137(3):032905.
[33] Ma Tianshou,Chen Ping.A wellbore stability analysis model with chemical-mechanical coupling for shale gas reservoirs[J].Journal of Natural Gas Science and Engineering,2015,26:72-98.
[34] 糜利栋,姜汉桥,李俊键,等.页岩储层渗透率数学表征[J].石油学报,2014,35(5):928-934.
Mi Lidong,Jiang Hanqiao,Li Junjian,et al.Mathematical characterization of permeability in shale reservoirs[J].Acta Petrolei Sinica,2014,35(5):928-934.
[35] Yang T H,Jia P,Shi W H,et al.Seepage-stress coupled analysis on anisotropic characteristics of the fractured rock mass around roadway[J].Tunnelling and Underground Space Technology,2014,43:11-19.
[36] Ma Tianshou,Chen Ping,Han Xiong.Simulation and interpretation of the pressure response for formation testing while drilling[J].Journal of Natural Gas Science and Engineering,2015,23:259-271.

页岩气储层井周孔隙压力传递数值分析方法

Numerical analysis method of pore pressure propagation around the borehole for shale gas reservoirs

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	糜利栋. 基于产气剖面的页岩气离散裂缝网络反演方法[J]. 石油学报, 2021, 42(4): 481-491.
[2]	何骁, 吴建发, 雍锐, 赵圣贤, 周小金, 张洞君, 张德良, 钟成旭. 四川盆地长宁—威远区块海相页岩气田成藏条件及勘探开发关键技术[J]. 石油学报, 2021, 42(2): 259-272.
[3]	梁兴, 徐政语, 张介辉, 张朝, 李兆丰, 蒋佩, 蒋立伟, 朱斗星, 刘臣. 浅层页岩气高效勘探开发关键技术——以昭通国家级页岩气示范区太阳背斜区为例[J]. 石油学报, 2020, 41(9): 1033-1048.
[4]	陈浩, 周涛, 樊怀才, 张鉴, 杨胜来. 页岩储层人工裂缝岩样制备方法及应力敏感性[J]. 石油学报, 2020, 41(9): 1117-1126.
[5]	李俊乾, 卢双舫, 张鹏飞, 李文镖, 荆铁亚, 冯文俊. 页岩基质孔隙水定量表征及微观赋存机制[J]. 石油学报, 2020, 41(8): 979-990.
[6]	毕海滨, 孟昊, 高日丽, 郑婧, 徐小林, 鞠秀娟, 牛伟, 张劲, 周明庆, 赵丽华. 页岩气未开发区单井可采储量评估方法[J]. 石油学报, 2020, 41(5): 565-573.
[7]	何治亮, 聂海宽, 胡东风, 蒋廷学, 王濡岳, 张钰莹, 张光荣, 卢志远. 深层页岩气有效开发中的地质问题——以四川盆地及其周缘五峰组—龙马溪组为例[J]. 石油学报, 2020, 41(4): 379-391.
[8]	聂海宽, 李东晖, 姜涛, 颜彩娜, 杜伟, 张光荣. 基于笔石带特征的页岩等时地层测井划分方法及意义——以四川盆地及其周缘五峰组—龙马溪组为例[J]. 石油学报, 2020, 41(3): 273-283.
[9]	郭彤楼, 何希鹏, 曾萍, 高玉巧, 张培先, 何贵松. 复杂构造区页岩气藏地质特征与效益开发建议——以四川盆地及其周缘五峰组—龙马溪组为例[J]. 石油学报, 2020, 41(12): 1490-1500.
[10]	邱楠生, 冯乾乾, 腾格尔, 申宝剑, 马中良, 俞凌杰, 曹爱强. 川东南丁山地区燕山期—喜马拉雅期差异构造-热演化与页岩气保存[J]. 石油学报, 2020, 41(12): 1610-1622.
[11]	李相方, 冯东, 张涛, 孙政, 何敏侠, 刘庆, 刘文远, 赵文, 李靖. 毛细管力在非常规油气藏开发中的作用及应用[J]. 石油学报, 2020, 41(12): 1719-1733.
[12]	何昌龙, 吕龑, 黄天俊, 李益, 郗诚, 钟光海, 吴仕虎, 杨广广, 干大勇. 基于岩石物理分析的页岩气叠前预测方法在川南威远地区的应用[J]. 石油学报, 2020, 41(10): 1209-1218.
[13]	邹才能, 潘松圻, 荆振华, 高金亮, 杨智, 吴松涛, 赵群. 页岩油气革命及影响[J]. 石油学报, 2020, 41(1): 1-12.
[14]	张君峰, 许浩, 周志, 任鹏飞, 郭景震, 王琼. 鄂西宜昌地区页岩气成藏地质特征[J]. 石油学报, 2019, 40(8): 887-899.
[15]	罗胜元, 陈孝红, 刘安, 李海, 孙冲. 中扬子宜昌地区下寒武统水井沱组页岩现场解吸气特征及地质意义[J]. 石油学报, 2019, 40(8): 941-955.