渤南油田低渗透储集层岩性对地应力场的影响
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摘要
针对岩石力学性质差异对储集层地应力场的影响机制问题开展详细分析及探讨。利用三轴压缩试验分析渤南油田低渗透储集层岩石力学性质的差异性。通过储集层力学分析探讨岩石力学性质差异对储集层地应力的影响机制。利用应力椭圆及有限元模拟方法,探讨岩石力学性质差异对储集层地应力场的影响规律。渤南油田低渗透储集层岩性越粗弹性模量越大、泊松比越低,砂岩相与泥岩相的岩石力学参数及应力-应变关系差异较大。岩性不同造成力学性质的差异,力学性质的差异造成岩性接触界面产生额外应力,额外应力的存在影响储集层地应力。不考虑构造特征对地应力场的影响,储集层地应力场受额外应力大小及岩性接触面与边界应力夹角的双重协同控制。图11表2参26
The differences in mechanical properties of rocks were analyzed by triaxial compression test in low permeability reservoirs of the Bonan Oilfield. Through the analysis of reservoir mechanics, the influence mechanisms of different mechanical properties of rocks on in-situ stress were studied. By means of stress ellipse and finite element simulation, the influence rules of different mechanical properties of rocks on in-situ stress field were discussed. In the Bonan Oilfield, the coarser rock has a larger Young's modulus value and a lower Poisson's ratio, the rock mechanical parameters and stress-strain relationship of sandstone facies and mudstone facies are different. Different rocks have different mechanical properties, which cause additional stress at the interface of rocks, and the existence of additional stress affects the in-situ stress. Without considering the influence of tectonic characteristics on the in-situ stress field, the in-situ stress is controlled by the magnitude of additional stress and the angle between lithofacies contact surface and boundary stress.
The differences in mechanical properties of rocks were analyzed by triaxial compression test in low permeability reservoirs of the Bonan Oilfield. Through the analysis of reservoir mechanics, the influence mechanisms of different mechanical properties of rocks on in-situ stress were studied. By means of stress ellipse and finite element simulation, the influence rules of different mechanical properties of rocks on in-situ stress field were discussed. In the Bonan Oilfield, the coarser rock has a larger Young's modulus value and a lower Poisson's ratio, the rock mechanical parameters and stress-strain relationship of sandstone facies and mudstone facies are different. Different rocks have different mechanical properties, which cause additional stress at the interface of rocks, and the existence of additional stress affects the in-situ stress. Without considering the influence of tectonic characteristics on the in-situ stress field, the in-situ stress is controlled by the magnitude of additional stress and the angle between lithofacies contact surface and boundary stress.
引文
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[11]刘显太,戴俊生,徐建春,等.纯41断块沙四段现今地应力场有限元模拟[J].石油勘探与开发,2003,30(3):126-128.LIU Xiantai,DAI Junsheng,XU Jianchun,et al.Finite element simulation of the present ground stress field of Sha-4 Member in the Chun-41 fault block[J].Petroleum Exploration and Development,2003,30(3):126-128.
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[14]谭成轩,孙叶,王连捷.地应力测量值得注意的若干问题[J].地质力学学报,2003,9(3):275-280.TAN Chengxuan,SUN Ye,WANG Lianjie.Some problems of in-situ crustal stress measurements[J].Journal of Geomechanics,2003,9(3):275-280.
[15]王珂,戴俊生,冯建伟,等.塔里木盆地克深前陆冲断带储层岩石力学参数研究[J].中国石油大学学报(自然科学版),2014(5):25-33.WANG Ke,DAI Junsheng,FENG Jianwei,et al.Research on reservoir rock mechanical parameters of Keshen foreland thrust belt in Tarim Basin[J].Journal of China University of Petroleum(Edition of Natural Science),2014(5):25-33.
[16]杨海博,武云云.致密储层岩石的微观结构和力学性质试验分析[J].复杂油气藏,2011,4(3):10-15.YANG Haibo,WU Yunyun.The experimental analysis of microstructure and mechanical properties of tight reservoir rocks[J].Complex Hydrocarbon Reservoirs,2011,4(3):10-15.
[17]俞然刚,田勇.砂岩岩石力学参数各向异性研究[J].实验力学,2013,28(3):368-375.YU Ran’gang,TIAN Yong.On the rock mechanics parameters anisotropy of sandstone[J].Journal of Experimental Mechanics,2013,28(3):368-375.
[18]景锋,盛谦,张勇慧,等.不同地质成因岩石地应力分布规律的统计分析[J].岩土力学,2008,29(7):1877-1883.JING Feng,SHENG Qian,ZHANG Yonghui,et al.Statistical analysis of geostress distribution laws for difference rocks[J].Rock and Soil Mechanics,2008,29(7):1877-1883.
[19]秦向辉,谭成轩,孙进忠,等.地应力与岩石弹性模量关系试验研究[J].岩土力学,2012,33(6):1689-1695.QIN Xianghui,TAN Chengxuan,SUN Jinzhong,et al.Experimental study of relation between in-situ crustal stress and rock elastic modulus[J].Rock and Soil Mechanics,2012,33(6):1689-1695.
[20]裴启涛,丁秀丽,黄书岭,等.地应力与岩体模量关系的理论及试验研究[J].冰川冻土,2016,38(4):889-897.PEI Qitao,DING Xiuli,HUANG Shuling,et al.Theoretical and experimental study of relation between in-situ stress and rock mass modulus[J].Journal of Glaciology and Geocryology,2016,38(4):889-897.
[21]TEUFEL L W.Influence of lithology and geologic structure on in situ stress:Examples of stress heterogeneity in reservoirs[J].Reservoir Characterization II,1991:565-578.
[22]祖克威,曾联波,刘喜中,等.厚层河道砂体地应力分布影响因素分析[J].地质力学学报,2014,20(2):149-158.ZU Kewei,ZENG Lianbo,LIU Xizhong,et al.Analysis of the influencing factors for ground stress in channel sandstone[J].Journal of Geomechanics,2014,20(2):149-158.
[23]高磊.饱水对岩石力学性能影响的试验研究[J].新疆水利,2015(2):1-5.GAO Lei.Experimental study on effect of saturated water on rock mechanical properties[J].Xinjiang Water Resources,2015(2):1-5.
[24]李小双.高温后粗砂岩力学性质试验研究[D].焦作:河南理工大学,2008.LI Xiaoshuang.Experimental study on mechanical properties of grit stone after high temperature[D].Jiaozuo:Henan Polytechnic University,2008.
[25]尤明庆.岩石试样的杨氏模量与围压的关系[J].岩石力学与工程学报,2003,22(1):53-60.YOU Mingqing.Effect of confining pressure on the Young’s Modulus of rock specimen[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(1):53-60.
[26]李志鹏,卜丽侠.渤海湾盆地渤南洼陷沙四段岩相的岩石力学性质差异[J].石油实验地质,2019,41(2):228-233.LI Zhipeng,BU Lixia.Difference of lithofacies mechanical properties of the fourth member of Shahejie Formation in the Bonan Subsag,Bohai Bay Basin[J].Petroleum Geology&Experiment,2019,41(2):228-233.
[2]陈庆宣,王维襄,孙叶,等.岩石力学与构造应力场[M].北京:地质出版社,1998.CHEN Qingxuan,WANG Weixiang,SUN Ye,et al.Rock mechanics and tectonic stress field[M].Beijing:Geological Publishing House,1998.
[3]刘钦节,闫相祯,杨秀娟.分层地应力方法在薄互层低渗油藏大型压裂设计中的应用[J].石油钻采工艺,2009,31(4):83-88.LIU Qinjie,YAN Xiangzhen,YANG Xiujuan.Application of stratified stress method in massive hydraulic fracturing design[J].Oil Drilling&Production Technology,2009,31(4):83-88.
[4]严成增,郑宏,孙冠华,等.基于FDEM-Flow研究地应力对水力压裂的影响[J].岩土力学,2016,37(1):237-246.YAN Chengzeng,ZHENG Hong,SUN Guanhua,et al.Effect of in-situ stress on hydraulic fracturing based on FDEM-Flow[J].Rock and Soil Mechanics,2016,37(1):237-246.
[5]TANG S H,ZHU B C,YAN Z F.Effect of crustal stress on hydraulic fracturing in coalbed methane wells[J].Journal of China Coal Society,2011,36(1):65-69.
[6]王伯军,张士诚,李莉.基于地应力场的井网优化设计方法研究[J].大庆石油地质与开发,2007,26(3):55-59.WANG Bojun,ZHANG Shicheng,LI Li.Optimization design method of well pattern based on in-situ stress field[J].Petroleum Geology&Oilfield Development in Daqing,2007,26(3):55-59.
[7]付道明,吴晓东,牟善波,等.大型压裂技术在低孔低渗薄互层中应用与研究[J].科学技术与工程,2010,10(1):213-216.FU Daoming,WU Xiaodong,MU Shanbo,et al.Research on and application of large-scale fracturing technology in low porosity and ultra-low permeability laminated layers[J].Science Technology and Engineering,2010,10(1):213-216.
[8]CIRAK F,DEITERDING R,MAUCH S P.Large-scale fluid-structure interaction simulation of viscoplastic and fracturing thin-shells subjected to shocks and detonations[J].Computers&Structures,2007,85(11):1049-1065.
[9]ZENG Y,YANG B.Equipment outfitting and application for large-scale fracturing in shale gas horizontal wells[J].Oil Drilling&Production Technology,2013,35(6):78-82.
[10]赵金洲,王松,李勇明.页岩气藏压裂改造难点与技术关键[J].天然气工业,2012,32(4):46-49.ZHAO Jinzhou,WANG Song,LI Yongming.Difficulties and technical keys of fracturing reformation in shale gas reservoir[J].Natural Gas Industry,2012,32(4):46-49.
[11]刘显太,戴俊生,徐建春,等.纯41断块沙四段现今地应力场有限元模拟[J].石油勘探与开发,2003,30(3):126-128.LIU Xiantai,DAI Junsheng,XU Jianchun,et al.Finite element simulation of the present ground stress field of Sha-4 Member in the Chun-41 fault block[J].Petroleum Exploration and Development,2003,30(3):126-128.
[12]汪必峰,戴俊生.牛35块沙河街组三段Es3中现今地应力研究[J].西安石油大学学报(自然科学版),2007,22(3):24-27.WANG Bifeng,DAI Junsheng.Study on the present ground stress of Es3 in Niu 35 fault block[J].Journal of Xi’an Shiyou University(Natural Science Edition),2007,22(3):24-27.
[13]葛洪魁,林英松.油田地应力的分布规律[J].断块油气田,1998,5(5):1-5.GE Hongkui,LIN Yingsong.Distribution of in-situ stress in oilfields[J].Fault Block Oil and Gas Field,1998,5(5):1-5.
[14]谭成轩,孙叶,王连捷.地应力测量值得注意的若干问题[J].地质力学学报,2003,9(3):275-280.TAN Chengxuan,SUN Ye,WANG Lianjie.Some problems of in-situ crustal stress measurements[J].Journal of Geomechanics,2003,9(3):275-280.
[15]王珂,戴俊生,冯建伟,等.塔里木盆地克深前陆冲断带储层岩石力学参数研究[J].中国石油大学学报(自然科学版),2014(5):25-33.WANG Ke,DAI Junsheng,FENG Jianwei,et al.Research on reservoir rock mechanical parameters of Keshen foreland thrust belt in Tarim Basin[J].Journal of China University of Petroleum(Edition of Natural Science),2014(5):25-33.
[16]杨海博,武云云.致密储层岩石的微观结构和力学性质试验分析[J].复杂油气藏,2011,4(3):10-15.YANG Haibo,WU Yunyun.The experimental analysis of microstructure and mechanical properties of tight reservoir rocks[J].Complex Hydrocarbon Reservoirs,2011,4(3):10-15.
[17]俞然刚,田勇.砂岩岩石力学参数各向异性研究[J].实验力学,2013,28(3):368-375.YU Ran’gang,TIAN Yong.On the rock mechanics parameters anisotropy of sandstone[J].Journal of Experimental Mechanics,2013,28(3):368-375.
[18]景锋,盛谦,张勇慧,等.不同地质成因岩石地应力分布规律的统计分析[J].岩土力学,2008,29(7):1877-1883.JING Feng,SHENG Qian,ZHANG Yonghui,et al.Statistical analysis of geostress distribution laws for difference rocks[J].Rock and Soil Mechanics,2008,29(7):1877-1883.
[19]秦向辉,谭成轩,孙进忠,等.地应力与岩石弹性模量关系试验研究[J].岩土力学,2012,33(6):1689-1695.QIN Xianghui,TAN Chengxuan,SUN Jinzhong,et al.Experimental study of relation between in-situ crustal stress and rock elastic modulus[J].Rock and Soil Mechanics,2012,33(6):1689-1695.
[20]裴启涛,丁秀丽,黄书岭,等.地应力与岩体模量关系的理论及试验研究[J].冰川冻土,2016,38(4):889-897.PEI Qitao,DING Xiuli,HUANG Shuling,et al.Theoretical and experimental study of relation between in-situ stress and rock mass modulus[J].Journal of Glaciology and Geocryology,2016,38(4):889-897.
[21]TEUFEL L W.Influence of lithology and geologic structure on in situ stress:Examples of stress heterogeneity in reservoirs[J].Reservoir Characterization II,1991:565-578.
[22]祖克威,曾联波,刘喜中,等.厚层河道砂体地应力分布影响因素分析[J].地质力学学报,2014,20(2):149-158.ZU Kewei,ZENG Lianbo,LIU Xizhong,et al.Analysis of the influencing factors for ground stress in channel sandstone[J].Journal of Geomechanics,2014,20(2):149-158.
[23]高磊.饱水对岩石力学性能影响的试验研究[J].新疆水利,2015(2):1-5.GAO Lei.Experimental study on effect of saturated water on rock mechanical properties[J].Xinjiang Water Resources,2015(2):1-5.
[24]李小双.高温后粗砂岩力学性质试验研究[D].焦作:河南理工大学,2008.LI Xiaoshuang.Experimental study on mechanical properties of grit stone after high temperature[D].Jiaozuo:Henan Polytechnic University,2008.
[25]尤明庆.岩石试样的杨氏模量与围压的关系[J].岩石力学与工程学报,2003,22(1):53-60.YOU Mingqing.Effect of confining pressure on the Young’s Modulus of rock specimen[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(1):53-60.
[26]李志鹏,卜丽侠.渤海湾盆地渤南洼陷沙四段岩相的岩石力学性质差异[J].石油实验地质,2019,41(2):228-233.LI Zhipeng,BU Lixia.Difference of lithofacies mechanical properties of the fourth member of Shahejie Formation in the Bonan Subsag,Bohai Bay Basin[J].Petroleum Geology&Experiment,2019,41(2):228-233.