Novel method of automatically picking up water saturation model parameters based on pore structure
SI Zhaowei1, XU Feng1, ZHAO Wenjun2, PENG Hongli1, LIU Tangyan2
1. Exploration and Development Research Institute, Jidong Oilfield Company, PetroChina, Tangshan, Hebei 063000, China; 2. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
Abstract:For severely heterogeneous reservoirs, rock electric parameters are generally assumed to be constants when their water saturation is calculated. Based on the core data from nuclear magnetic resonance (NMR) experi-ments, data from water-displaced rock conductivity experiments after oil saturation, actual logging data by NMR, and optimized inversion data of sphere-cylinder models, this paper establishes the matching relationship between the pore structure of reservoirs and the parameters of rock conductivity models. According to the ma-tching relationship, the parameters of saturation models can be automatically picked up point by point during logging data processing, so as to improve the calculation accuracy of saturation for complex reservoirs. The method is applied to process measured core data and logging data by NMR from Nanpu Oilfield of Jidong, and the calculation accuracy of water saturation for heterogeneous reservoirs is effectively improved. The application results of actual data show that the algorithm for automatically picking up water saturation model parameters is stable and reliable, and manual intervention is not required in the calculation. In addition, the algorithm has a good application prospect for complex and heterogeneous reservoirs.
司兆伟, 徐风, 赵文君, 彭洪立, 刘堂晏. 基于孔隙结构自动拾取含水饱和度模型参数的新方法[J]. 石油地球物理勘探, 2023, 58(1): 152-160.
SI Zhaowei, XU Feng, ZHAO Wenjun, PENG Hongli, LIU Tangyan. Novel method of automatically picking up water saturation model parameters based on pore structure. Oil Geophysical Prospecting, 2023, 58(1): 152-160.
王谦,苏波,宋帆,等.油基泥浆密闭取心饱和度校正方法[J].测井技术,2014,38(4):391-395.WANG Qian,SU Bo,SONG Fan,et al.Saturation correction method for sealed coring drilling with oil-based mud[J].Well Logging Technology,2014,38(4):391-395.
[2]
张旭东,康楠,何伟,等.砂岩样泡氘水法确定含油饱和度核磁共振实验研究[J].石油化工应用,2017,36(11):32-37.ZHANG Xudong,KANG Nan,HE Wei,et al.Experimental study on nuclear magnetic resonance of sandstone samples by the methods of soaking deuterium water[J].Petrochemical Industry Application,2017,36(11):32-37.
[3]
张凤敏,孙广博,于俊文,等.根据油藏流体饱和度形成条件建立碎屑岩油层含油饱和度解释模型[J].石油勘探与开发,2004,31(5):63-65.ZHANG Fengmin,SUN Guangbo,YU Junwen,et al.Oil saturation interpretation model of clastic reservoir from the formation conditions of reservoir fluid saturation[J].Petroleum Exploration and Development,2004,31(5):63-65.
[4]
肖立志.核磁共振成像测井与岩石核磁共振及其应用[M].北京:科学出版社,1998.XIAO Lizhi.Nuclear Magnetic Resonance Imaging Logging and Rock Nuclear Magnetic Resonance and Its Application[M].Science Press,Beijing,1998.
[5]
肖昆,邹长春,邓居智,等.利用声波测井估算裂缝型水合物储层水合物饱和度[J].石油地球物理勘探,2017,52(5):1067-1076.XIAO Kun,ZOU Changchun,DENG Juzhi,et al.Gas hydrate saturation in fractured reservoirs with acoustic logging[J].Oil Geophysical Prospecting,2017,52(5):1067-1076.
[6]
HODGKINS M A,HOWARD J J.Application of NMR logging to reservoir characterization of low-resistivity sands in the gulf of Mexico[J].AAPG Bulletin,1999,83(1):114-127.
[7]
ARCHIE G E.The electrical resistivity log as an aid in determining some reservoir characteristics[J].Transactions of the AIME,1942,146(1):54-62.
[8]
REVIL A,CATHLES L M Ⅲ,LOSH S,et al.Electrical conductivity in shaly sands with geophysical applications[J].Journal of Geophysical Research:Solid Earth,1998,103(B10):23925-23936.
[9]
康清清,胡清龙,边立恩,等.塔里木盆地库车地区低孔低渗储层测井饱和度解释模型[J].油气地球物理,2008,6(4):46-48.KANG Qingqing,HU Qinglong,BIAN Lien,et al.The research of calculating saturation in low porosity and low permeability reservoirs[J].Petroleum Geophysics,2008,6(4):46-48.
[10]
WAXMAN M H,SMITS L J M.Electrical conducti-vities in oil-bearing shaly sands[J].Society of Petro-leum Engineers Journal,1968,8(2):107-122.
[11]
CLAVIER C,COATES G,DUMANOIR J.Theoretical and experimental bases for the dual-water model for interpretation of shaly sands[J].Society of Petroleum Engineers Journal,1984,24(2):153-168.
[12]
SHANG B Z,HAMMAN J G,CALDWELL D H.A physical model to explain the first archie relationship and beyond[C].SPE Annual Technical Conference and Exhibition,2003,SPE-84300-MS.
[13]
邵才瑞,张鹏飞,张福明,等.用J函数提高致密砂岩气层饱和度测井评价精度[J].中国石油大学学报(自然科学版),2016,40(4):57-65.SHAO Cairui,ZHANG Pengfei,ZHANG Fuming,et al.Improving well log evaluation accuracy of tight sandstone gas saturation using J function[J].Journal of China University of Petroleum (Edition of Natural Science),2016,40(4):57-65.
[14]
HU S,ZHOU C,LI X,et al.A tight sandstone trapezoidal pore oil saturation model[J].Petroleum Exploration and Development,2017,44(5):876-886.
[15]
任广慧,王卫萍,葛秋现,等.马寨油田低电阻率油层测井方法研究[J].石油地球物理勘探,2003,38(3):294-296,307.REN Guanghui,WANG Weiping,GE Qiuxian,et al.Study of well logging method for reservoir with low resistivity in Mazhai Oilfield[J].Oil Geophysical Prospecting,2003,38(3):294-296,307.
[16]
周改英,刘向君.致密砂岩储层岩电参数实验研究[J].科技导报,2011,29(18):38-41.ZHOU Gaiying,LIU Xiangjun.Experimental research of rock electrical parameters for tight sandstone[J].Science & Technology Review,2011,29(18):38-41.
[17]
宋延杰,吕桂友,王春燕,等.混合泥质砂岩有效介质通用HB电阻率模型研究[J].石油地球物理勘探,2003,38(3):275-280.SONG Yanjie,LÜ Guiyou,WANG Chunyan,et al.Study of general effective medium HB resistivity model in mixed shaly sands[J].Oil Geophysical Prospecting,2003,38(3):275-280.
[18]
KUMAR M,SENDEN T J,ARNS C H,et al.Probing the Archie’s exponent under variable saturation conditions[J].Petrophysics,2011,52(2):124-134.
[19]
KENNEDY W D,HERRICK D C.Conductivity mo-dels for Archie rocks[J].Geophysics,2012,77(3):WA109-WA128.
[20]
刘向君,刘洪,杨超.碳酸盐岩气层岩电参数实验[J].石油学报,2011,32(1):131-134.LIU Xiangjun,LIU Hong,YANG Chao.Experimental study on rock-electricity parameters of carbonate gas reservoirs[J].Acta Petrolei Sinica,2011,32(1):131-134.
[21]
BELEVICH A,BAL A A.The problem with silt in low-resistivity low-contrast (LRLC) pay reservoirs[J].Petrophysics,2018,59(2):118-135.
[22]
AWOLAYO A,ASHQAR A,UCHIDA M,et al.A cohesive approach at estimating water saturation in a low-resistivity pay carbonate reservoir and its validation[J].Journal of Petroleum Exploration and Production Technology,2017,7(3):637-657.
[23]
刘堂晏,周灿灿,马在田,等.球管孔隙模型的约束寻优及应用[J].同济大学学报(自然科学版),2006,34(11):1464-1469.LIU Tangyan,ZHOU Cancan,MA Zaitian,et al.Restricted and optimized conditions of sphere-cylinder model and its applications[J].Journal of Tongji University (Natural Science),2006,34(11):1464-1469.
[24]
SHANG B Z,HAMMAN J G,CALDWELL D H.Improved water saturation estimation using equivalent rock element model and application to different rock types[C].Europec/EAGE Conference and Exhibition,2008,SPE-113342-MS.
[25]
LIU T,LI Q,ZHANG C,et al.Studies and applications of dual pore saturation model based on pore structure classification in tight reservoir[J].Frontiers in Earth Science,2022,9:802-842.
[26]
王谦,谭茂金,石玉江,等.径向基函数神经网络法致密砂岩储层相对渗透率预测与含水率计算[J].石油地球物理勘探,2020,55(4):864-872.WANG Qian,TAN Maojin,SHI Yujiang,et al.Prediction of relative permeability and calculation of water cut of tight sandstone reservoir based on radial basis function neural network[J].Oil Geophysical Prospecting,2020,55(4):864-872.
[27]
朱明,贾春明,穆玉庆,等.基于正态分布拟合的致密砂砾岩储层核磁共振测井可变T2截止值计算方法[J].石油地球物理勘探,2021,56(3):612-621.ZHU Ming,JIA Chunming,MU Yuqing,et al.A method of predicting T2 cutoffs from NMR logging data of tight glutenite reservoirs based on normal distribution simulation[J].Oil Geophysical Prospecting,2021,56(3):612-621.