基于渗流和水化的泥页岩破裂压力计算模型
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摘要
基于弹塑性力学和岩石力学相关理论,应用最大张应力准则,在经典黄氏模型的基础上,考虑了钻井渗滤液在孔隙中的径向渗流在井壁围岩所产生的附加应力场、泥页岩的孔隙度、水基钻井液水化作用等的影响,建立了泥页岩油层部位破裂压力模型。结合现场压裂实验数据,用几种经典模型计算了泥页岩油层破裂压力,并与实测值进行了对比,本文模型误差为3.65%,表明本文破裂压力预测模型更加接近实际的地层破裂压力,可为钻井水力压裂设计提供参考。
In this paper, based on the theory of elastic-plastic mechanics and rock mechanics and the application of the maximum tensile stress criterion, a modified model is established. In this model, the additional stress generated in the wall rock by radial seepage of drilling infiltration filtrate through the pores, the effects of rock porosity and drilling fluid hydration are considered based on the classical model. Combining with the field fracturing experimental data, the fracturing pressure of shale reservoir is calculated by several classical models and compared with the measured values. The error of this model is 3.65%, which is closer to the actual formation fracturing pressure and provides a reference for the design of drilling hydraulic fracturing.
In this paper, based on the theory of elastic-plastic mechanics and rock mechanics and the application of the maximum tensile stress criterion, a modified model is established. In this model, the additional stress generated in the wall rock by radial seepage of drilling infiltration filtrate through the pores, the effects of rock porosity and drilling fluid hydration are considered based on the classical model. Combining with the field fracturing experimental data, the fracturing pressure of shale reservoir is calculated by several classical models and compared with the measured values. The error of this model is 3.65%, which is closer to the actual formation fracturing pressure and provides a reference for the design of drilling hydraulic fracturing.
引文
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[12]李培超.射孔完井条件下地层破裂压力修正公式[J].上海工程技术大学学报,2009,23(2):157-160.(LI Peichao.Modified formula of formation breakdown pressure for perforation completions of vertical wells[J].Journal of Shanghai university of engineering science,2009,23(2):157-160(in Chinese)).
[13]李传亮.射孔完井条件下的岩石破裂压力计算公式[J].石油钻采工艺,2002,24(2):37-38.(LI Chuanliang.Calculation formula of rock fracture pressure under perforated completion condition[J].Oil drilling&production technology,2002,24(2):37-38(in Chinese)).
[14]王永岩,范夕燕,甘小南,等.温度和压力作用下软岩流变相似理论的研究及应用[J].应用力学学报,2017,34(6):1193-1199.(WANG Yongyan,FAN Xiyan,GAN Xiaonan,et al.Study and application of the rheological similarity theory of soft rock under the action of temperature and pressure[J].Chinese journal of applied mechanics,2017,34(6):1193-1199(in Chinese)).
[15]王永岩,朱羽萌,范夕燕,等.孔隙率对页岩相似材料破坏影响的试验研究[J].应用力学学报,2016,33(4):695-700.(WANGYongyan,ZHU Yumeng,FAN Xiyan,et al.Experimental study on the effect of porosity on the damage of similar shale materials[J].Chinese journal of applied mechanics,2016,33(4):695-700(in Chinese)).
[16]邓金根,刘杨,蔚宝华,等.高温高压地层破裂压力预测方法[J].石油钻探技术,2009,37(5):43-46.(DENG Jin’gen,LIU Yang,WEI Baohua,et al.Formation fracture pressure prediction method in high temperature and high pressure formations[J].Petroleum drilling techniques,2009,37(5):43-46(in Chinese)).
[17]黄荣撙.水力压裂裂缝的起裂和扩展[J].石油勘探与开发,1982(5):65-77.(HUANG Rongzun.Initiation and propagation of fractures in hydraulic fracturing[J].Petroleum exploration and development,1982(5):65-77(in Chinese)).
[18]金衍,陈勉.井壁稳定力学[M].北京:科学出版社,2012:56-58.(JINYan,CHEN Mian.Wellbore stability mechanics[M].Beijing:Science Press,2012:56-58(in Chinese)).
[19]CHENEVERT M E,PERNOT V.Control of shale swelling pressures using inhibitive water-base muds[C]//Proceedings of SPE Annual Technical Conference and Exhibition.New Orleans,Louisiana:Society Petroleum Engineers,1998.
[20]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.
[21]黄荣樽.地层破裂压力预测模式的探讨[J].华东石油学院学报,1984(4):16-28.(HUANG Rongzun.A model for predicting formation fracture pressure[J].Journal of the university of petroleum China,1984(4):16-28(in Chinese)).
[22]王京印.泥页岩井壁稳定性力学化学耦合模型研究[D].青岛:中国石油大学(华东),2007.(WANG Jingyin.Chemical-mechanical modeling of borehole stability in shale[D].Qingdao:China University of Petroleum,2007(in Chinese)).
[2]屈展,王萍.泥页岩井壁蠕变损伤失稳研究[M].北京:科学出版社.2016.(QU Zhan,WANG Ping.Creep damage instability study of shale[M].Beijing:Science Press,2016(in Chinese)).
[3]王萍,屈展,黄海,等.含水状态下硬脆性泥页岩蠕变特性实验研究[J].科学技术与工程,2016,16(15):66-71.(WANG Ping,QU Zhan,HUANG Hai,et al.Creep experimental study of brittle shale triaxial state under aqueous[J].Science technology&engineering,2016,16(15):66-71(in Chinese)).
[4]王萍,屈展,黄海.地层水矿化度对硬脆性泥页岩蠕变规律影响的试验研究[J].石油钻探技术,2015,43(5):63-68.(WANG Ping,QU Zhan,HUANG Hai.Experimental study of the effect of formation water salinity on creep laws of the hard brittle shale[J].Petroleum drilling techniques,2015,43(5):63-68(in Chinese)).
[5]严向阳,胡永全,李楠,等.泥页岩地层破裂压力计算模型研究[J].岩性油气藏,2015,27(2):109-113.(YAN Xiangyang,HU Yongquan,LI Nan,et al.Calculation model of breakdown pressure in shale formation[J].Lithologic hydrocarbon reservoir,2015,27(2):109-113(in Chinese)).
[6]张伟,邓嵩,樊洪海,等.地层破裂压力三维计算与显示方法[J].科学技术与工程,2014,14(34):140-144.(ZHANG Wei,DENG Song,FAN Honghai,et al.3D calculation and display for formation fracture pressure[J].Science technology&engineering,2014,14(34):140-144(in Chinese)).
[7]罗黎敏,胜亚楠,刘晓坡,等.含可信度地层破裂压力的钻前预测方法[J].断块油气田,2017,24(1):112-115.(LUO Limin,SHENGYa'nan,LIU Xiaopo,et al.Pre-drilling prediction of fracture pressure with credibility[J].Fault-block oil&gas field,2017,24(1):112-115(in Chinese)).
[8]彪仿俊,刘合,张劲,等.螺旋射孔条件下地层破裂压力的数值模拟研究[J].中国科学技术大学学报,2011,41(3):219-226.(BIAOFangjun,LIU He,ZHANG Jin,et al.A numerical study of fracture initiation pressure under helical perforation conditions[J].Journal of university of science&technology of China,2011,41(3):219-226(in Chinese)).
[9]薛世峰,孙春海,于海彬,等.螺旋射孔参数对地层破裂压力的影响[J].油气井测试,2015,24(6):11-13.(XUE Shifeng,SUNChunhai,YU Haibin,et al.Effect of spiral perforation parameters on formation fracture pressure[J].Well testing,2015,24(6):11-13(in Chinese)).
[10]东振,刘亚东,鲍清英,等.基于断裂力学的煤层气井破裂压力计算方法[J].东北石油大学学报,2015,39(6):111-120.(DONGZhen,LIU Yadong,BAO Qingying,et al.Calculation method for fracture pressure of coalbed methane well based on fracture mechanics[J].Journal of northeast petroleum university,2015,39(6):111-120(in Chinese)).
[11]崔杰,李忠慧.碳酸盐岩地层破裂压力预测新模型及其应用[J].中国石油大学学报(自然科学版),2010,34(2):71-73.(CUI Jie,LI Zhonghui.A new prediction model of fracture pressure of marine carbonate formation and its application[J].Journal of China university of petroleum(edition of natural science),2010,34(2):71-73(in Chinese)).
[12]李培超.射孔完井条件下地层破裂压力修正公式[J].上海工程技术大学学报,2009,23(2):157-160.(LI Peichao.Modified formula of formation breakdown pressure for perforation completions of vertical wells[J].Journal of Shanghai university of engineering science,2009,23(2):157-160(in Chinese)).
[13]李传亮.射孔完井条件下的岩石破裂压力计算公式[J].石油钻采工艺,2002,24(2):37-38.(LI Chuanliang.Calculation formula of rock fracture pressure under perforated completion condition[J].Oil drilling&production technology,2002,24(2):37-38(in Chinese)).
[14]王永岩,范夕燕,甘小南,等.温度和压力作用下软岩流变相似理论的研究及应用[J].应用力学学报,2017,34(6):1193-1199.(WANG Yongyan,FAN Xiyan,GAN Xiaonan,et al.Study and application of the rheological similarity theory of soft rock under the action of temperature and pressure[J].Chinese journal of applied mechanics,2017,34(6):1193-1199(in Chinese)).
[15]王永岩,朱羽萌,范夕燕,等.孔隙率对页岩相似材料破坏影响的试验研究[J].应用力学学报,2016,33(4):695-700.(WANGYongyan,ZHU Yumeng,FAN Xiyan,et al.Experimental study on the effect of porosity on the damage of similar shale materials[J].Chinese journal of applied mechanics,2016,33(4):695-700(in Chinese)).
[16]邓金根,刘杨,蔚宝华,等.高温高压地层破裂压力预测方法[J].石油钻探技术,2009,37(5):43-46.(DENG Jin’gen,LIU Yang,WEI Baohua,et al.Formation fracture pressure prediction method in high temperature and high pressure formations[J].Petroleum drilling techniques,2009,37(5):43-46(in Chinese)).
[17]黄荣撙.水力压裂裂缝的起裂和扩展[J].石油勘探与开发,1982(5):65-77.(HUANG Rongzun.Initiation and propagation of fractures in hydraulic fracturing[J].Petroleum exploration and development,1982(5):65-77(in Chinese)).
[18]金衍,陈勉.井壁稳定力学[M].北京:科学出版社,2012:56-58.(JINYan,CHEN Mian.Wellbore stability mechanics[M].Beijing:Science Press,2012:56-58(in Chinese)).
[19]CHENEVERT M E,PERNOT V.Control of shale swelling pressures using inhibitive water-base muds[C]//Proceedings of SPE Annual Technical Conference and Exhibition.New Orleans,Louisiana:Society Petroleum Engineers,1998.
[20]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.
[21]黄荣樽.地层破裂压力预测模式的探讨[J].华东石油学院学报,1984(4):16-28.(HUANG Rongzun.A model for predicting formation fracture pressure[J].Journal of the university of petroleum China,1984(4):16-28(in Chinese)).
[22]王京印.泥页岩井壁稳定性力学化学耦合模型研究[D].青岛:中国石油大学(华东),2007.(WANG Jingyin.Chemical-mechanical modeling of borehole stability in shale[D].Qingdao:China University of Petroleum,2007(in Chinese)).