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油井样品NMRT_2谱的影响因素及T_2截止值的确定方法_王志战

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油井 样品 NMRT_2 影响 因素 T_2 截止 的确 方法 王志战
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波 谱 学 杂 志»23»1ù2006M3  Chinese Journalof Magnetic ResonanceVol. 23 No.1Mar.2006ÓcI|:1000-4556(2006)01-0143-09油井样品NMR T2 谱的影响因素及T2 截止值的确定方法王志战1,2* , 邓美寅2 , 翟慎德2 , 周立发1(1.vйÉÐ",û½710069;2.;æF²5عÉcݳ,öêê257064)K 1:T2ö^‚H’(NMR)©、cÝ/Œ‹¨Ð³d、ßN¥$.û"T2ösN©•”、"ÖŸÉ(ûŸ、Rìvl、"Öì、"ÖÄAÿ、d#@8c#ŸÉ、HÄq、ÎAŸ)#¹ª£€Ä©yÍ¥•Y. T2©¸´^T2öÏK×1¥•”­B,Ê|¥SПВŸ°¤•Yž‚H’©²T.YVÓD°Ø,T2ö¥•YyÍ#T2©¸´¥’çZEÉ›s.1oM:‚H’;T2ö;íoHW;"ÖŸÉ;€Ä;T2©¸´ÏmsË|:TE122.2  ÓDSM’:A引言H’cÝ/Œ(MR-ML)ö1¨¿GÝCÆyÎßNû"(û、û‡„ÝC|)¥%"þŸ#@8ŸÉ,µ"Ö¨、sÎy、î'®、û"íå、B"•、’ŸÚ、õß、7?Ï¥T¨µEs×1¥il.1 T2 谱中包含的信息T2öÏcû"¥d¤sƒ、@8sƒ#@8ŸÉ©,î[?©ûû‡¥9d#、µrd#、1iq、º£„、Vî@8„、c²„#ð²T©ûFþØ•”[ 18,19] ,YV‰Z,ÎV©ÎA·”[21,22] 、ßN£öª[6,7] 、‘%ªê™ñ[19] 、ßNQ÷ûÉ[ 8] 、©GÝAÏ¥²£c©.m1 û"T2öÏîc¥[1,21,23]Fig.1 Informationincludedin T2 spectrum of arock sampleT2ö¥sƒS¶VVl¿1 msÀ£ms,ƒ¹v¥S¶ö1^®ûFÏd#vl¥sƒ„¥,vd#@8‹"v¥T2 ,7ld#@8‹"l¥T2(m1).y7, T2ö¥sƒS¶„‚´¥Ú®?Q˜d¤¥sÊfƒ,YÈT2ösƒS¶z,‚´®,sʵ[ 23-25] .T2ÿèHW É¥@8^Vî@8,T2ÿèHW ¥@8^º@8. T2öusVî@8Џº@8­W¥¸Kë¹T2©¸´.¿c²û"7ý,®¿T2ÿèHWÐð²¥TîQ1[ 21] ,î[ÉT2‹^ɲ,T2‹×ɲ.2 T2 谱影响因素分析T2ö;sN©k•”¥•Y,»s"ÖŸÉ#€Ä©yÍ¥•Y,ÞbT2ö¥•YyÍ,µù¿4ÚsÚ„³d、ßN£Ü.2.1 ©k•”T2ö¥•YT2ö^®ío1(ÿèwL)Q7Ÿ¥[19,21] ,7ío1»^ñßF¥²T[26] ,î[ío”、B”¥|´vl°¤•YžT2ö¥Ú[ 27] ,|´Vv,»ö•Y"Ö©#”)ØÎ,yN¾´³ôN+Ä、©T、©`QL¥$É›’ç.Â:ÅSKMS/Œ³„F&vNMR Plus³ó†ùÅ¥MR-MLTMH’cÝNû"sH¥ío”#B”sY^30„5 000,@8sH¥ío”#B”sY¹10„5 000.íoHW(TE)„©€HW(TW)¥É•YT2ö¥™ÿ.TWBçH, T2öÛTE¥9F7_·Mî,OíoHWÉ, T2ö¥sƒS¶N,ld#(ÂTr±d„°5±d©)¥é>¥ø×[ 13] ,Q‹û"d#²#d#@8sƒ¥?ï/†[17] , NMR9d#Êl.©€HW“H,öé>vd#¥,T2öVC¹144o  ö  Ð    ½         »23 ·‚hlPM[ 13] ,ÁVî@8„#d#Ê®.íoHW„©€HW9³ô‚]¥N˜|、‚]¥©T#‚]¥©`vL¥$’ç. MR-MLTMH’cÝNû"sH¥TE„TWsY¹0.18 ms„10000 ms,@8sH¥TE„TWsY¹0.7 ms„15 000 ms.VX?V¥ÓDŸA,µ¥ª‚H’©¥^9d#[28,29] ,µ¥ª‚H’©¥^µrd#[2,3,7,30,31] .ÂTÞ‚b‚Hd#¥ŸÉ,ü‚?ž’1s²T¥’Ÿ,­^¿®d®1%ª,µrd#„9d#¥µY v.YVsV[A,‚H’©N©¤¥d#îè^9d#Î^µrd#,|%¿TE•”¥vl.ÂTTE@l(l¿0. 3 ms),*¹T2öü?Q˜Trº@8¥,NH©¤¥d#¹9d#,YVTrº@8а5º@8­W©¸´¥Ê|,V[¤µrd#;ÂTTE v(v¿0. 3 ms),üöé>Trº@8¥,NH©¤¥d#¹µrd#;Û"TE¥?Ã9v,5°5º@8¥ü9ö‚]ñ¥é>,NH©¤¥d#ö ®,ÐLi=¥ûÈ?sµ v.2.2 "ÖŸÉT2ö¥•Y©•”Bç¥fƒ/,ûŸ[17] 、"Övl[ 32] 、û"Y%[32] 、"Öÿ[18] 、d#@8ŸÉ[33] 、"ÖÎAŸ[ 32]©yÍ9öT2öÁ3‚]ñ¥•Y.2.2. 1 岩性对T2 谱的影响T2ö‚¥ñ”ö1Ðû"¥d#²µ1.‚¥–Ú®Q˜Ëd#¥”,‚¥zQ˜Ëd#¥sÊfƒ,‚¥ñ”5Q˜d#vlsƒ¥õÃfƒ.CÉûË‚vd#,Èÿ;éû˵õÃsƒ¥vld#,ÈïõÃ¥‚ÿ;äû#‰Ÿ%ª¥d#、‰vl‚õÃ,#ÈïW¥Ø‚ÿ[18] (m2,éû„Ö÷"ÖsYŸ1¿êÇJ¥Li98Ý„CG2Ý).m2 ‚]ûŸ¥T2ö[18]Fig.2 T2 spectra of different lithology2.2. 2 岩样粒径对T2 谱的影响S=¥Btùî'Vü:‚H’©²T‚s"ÖRìvl¥•Y[ 10] .;–T2ö?Q˜û"¥d¤sƒfƒ,*¹V¿%l¥û‡Rì­W¥b#üöÐû"Ï145 »1ù   ¦½^©:²Ý"ÖNMR T2ö¥•YyÍ#T2©¸´¥’çZEË»vl¥d#¥ÿè|?3ßF,­^¨"ÖÞ=F£|û‡“ü”î“û”É›©¥fƒ/,÷ö•YMR-ML¥”É.S“¥ùîîT^, 3~ 6mm¥û‡,1 a†¿‚H’sN¥©,?¤¡i¥©Ú, 1~ 3 mm¥û‡ºµd#1röå(filtration radius)Rf ≤20 μmH,Œ?¨¿ûFþØ•”¥ßN[32].2.2. 3 样品粒度对T2 谱的影响ûŸY%‚H©²T9µ•Y.¦¹ö(1997)©¦¥ùî²TVü,VYéû、%éûžxéû,‚Hd#¥©µïv9v[ 17] . MR-MLTMH’cÝNÏ4YéûÏéû、%éû、Yxéû、%xéû¹Õ©T,9VüûŸY%‚H©^µ•Y¥.2.2. 4 样品状态对T2 谱的影响NMR©¥^û"d#@8Ï¥_‚.]¿bÏ¥û"ö‚]ñ¹>€1®£Û>^QFs,Á©¸´·H‚¥–†®,'d#s²TÊ®,î[1X©û"d#©•”,A¶¨M’¿¹ª£€Ä¥£·A(2%¥NaClKCl·A)Ä"É›„,i©[-B°i¾„·A­Ï.MQ,û"¥Vë£ö9Ú©¸´·H‚¥–,Á1®@8„、d#、1iq©•”¥s²TÊÚ,î[©-,³5€"û"¥Vë£[ 18] .2.2. 5 孔隙流体性质对T2 谱的影响ð²TÐT2ÿèHWîQ1[ 21] ,'²É^,ÿèHWÉ;²É×,ÿèHW.î[,²、£iÿ,²×ɲ¥ÿè|öУ¥|?3ßF,Áµrd#、1®@8„、c²„©©•”Ê®.6“,®¿²¥c_·”Ê®(²¹0.8~0.9,^ɲ„£¥¹1)[ 21,28] ,9öÁ©²T¥Ê®.2.2. 6 润湿性、磁化率对T2谱的影响û"¥ÎAŸ、û"ϨHþÉ¥c(HÄq)‚H’©²T9µüA¥•Y[14,17].d£A(:£)d#ºÉ¥NMRd#B‡Ld#[32] ;¨HþÉ¥cÚ,©|¥šhø×,©¤¥d#üö®.3 地层水矿化度对 T2 谱的影响¹ª£€ÄT2ö¥•Y^ÿ¸ÂP¥,ŒµñÙ5A¶ü’:B^€Ä¥Ö0Fîîs;=^€Ä¥Ú®T2ö¥•Yñ.¨HþÉ(M、ð、[©)„d¨HþÉT2ö¥•Yñ^‚]¥[16,17] . K+ 、Na+©BNÖ0]Åè,7Ca2+、Mn2+©=NÖ0FÎÿè,î[#¹ª£€Ä‚H’T2ö¥•YH,A¶·ü€Ä˘#¹ª£Ë˜[16] .9ž^ô¨HÖ0T2ö¥•Y,‚H’cÝ#©ÝÈȐ¨¨MnCl2·AϞû"GÝAÏ@F¾Ëk4¥÷E©c²„[ 18,19] .Bîfƒ/, Mn2+¥i³rž10g /L[,Œ@[h"£¥ÿè|,ϞHW¥É|%¿û"¹ª¥þŸÉ,þŸµ,ϞHWÉ.146o  ö  Ð    ½         »23 4 T2 截止值的确定方法®¿©ZE¥µs,‚]¥‚H’cÝN4¥©¸´ñ”^‚B"¥.Bî,S=¥N(RecCore-4、MPSK-4M、CPS-NMR)º4Ȩ¥usº@8#Vî@8¥T2©¸´(T2cutoff),7S“¥N(MR-MLTM)"N­“,Î4usTrº@8#°5º@8¥©¸´(T2cc-cutoff)[#usd#@8#8@8¥©¸´(T2pb-cutoff).7‚H’©ÝȐ¨MT2©¸´¥÷E©µrd#©•”[34] .’çT2©¸´KȨ¥÷E^֏E[ 35~ 38] ,ŒNEiØñÙ5:B^‚£âï¥vlÙ5,âïþl,1®@8Àµ›†‚,p|¥T2©¸´öVv;âïVv,»öÜB†sº£9‚€,Áp|¥T2©¸´Vl[20] ,6“Îöåʾéû¥d#².=^vld#Ï@8¥®iÿi‚',9ü^ªí‚vdÎ^ld,ÚëûµB†sº@8,º‚VvdϏº@8¥1èl,ldÏ¥º@81èv7X[20,35] ;Ø^’û"cµ²H(Tv¿20 cPs),®¿T v,‚^‚,OÿèHW ,öЏº£¥|?3ßF[21] .î[,¨N÷E’çT2©¸´‚’.T2©¸´ÐûŸµ1[ 11] ,'P]Bñ¹u.À]BgÝ,‚]¥ûŸ9“4µBñdB¥©¸´[11,27] .ØX¥÷E^ôLiÈ?ûs”Ÿ’穸´[35] ,9ü^ªôi=µrd#’çT2cc-cutoff ,ôi=1®@8„’çT2cutoff.8ZE^,ØœT2cc-cutoffP‚Hµrd#©¿È?µrd#;ØœT2cutoffP‚H1®@8„ÐÈ?1®@8„M©.9ü^7/©T[ 34]îë:e =∫T2maxT2cc-cutoff A(t)dtVs×100%S f f =∫T2maxT2cutoff A(t)dt∫T2cutoffT2min A(t)dt ×100%TÏ, e¹i=È?sd#, T2max¹T2Kv´, A(t)¹˜_ÿèHW©¿tH¥|–, Vs¹û"8, S f f¹i=È?s1®@8„, T2min¹T2Kl´.Np¤¥T2cc-cutoff#T2cutoff'¹’¥©¸´•”.147 »1ù   ¦½^©:²Ý"ÖNMR T2ö¥•YyÍ#T2©¸´¥’çZE©GÝAñ²£†þÏ¥²£c[39]H,ϲɠ^(Tl¿20 cPs),5²£T2ö¥¸K1 b#(m3);²É ×(Tv¿20cPs)H,²£|ö?3ßF(m4),V¨£äFц®ð²TsÖ²£|¥÷E[ 18]’穸´,9V¨M]ŸÉ¥²、£¥îX©1襆þ,ô1®@8„©¿†þϲ]äs”¥ð5,’çT2©¸´.5 结论1.‚H’T2ösíoHW、©€HW©©•”¥•Y,ʨ¥•”‚],©¤¥d#˘9‚],î[#‚Hd#|‚Hd#Ði=È?d#É›1H,A¶[N¥©•”¹$.2.‚H’T2ösûŸ、"Övl、û"Y%、"Öÿ、d#@8ŸÉ#c、ÎAŸ、HÄq©yÍ¥•Y.3.‚H’T2ös¹ª£€Ä¥•Y,Œ¨HÖ0Ðd¨HÖ0¥•YrTMQ,î[‹¾·ü€Ä˘¹ª£Ë˜.4.ô֏E’çû"¥T2©¸´‚’,‹¾ôi=È?s”Ÿ’ç.•IÓD:[1]  Zhang Yu-xiao(fÓk). The Applicationof Magnetic Resonance Image Log (MRIL)in Low Porosity and Peme-ability Reservoir(‚H’©Ý®d®1²ª‘MÏ¥‹¨)[ J] .Xinjiang Geology(¹É), 2004, 22(3):315-318.[2]  Zhu You-qing(ë¶]), Fu You-sheng(±µ6), Yang Xiao-ling(k*). The Applicationof MRIL in Explo-ration of Deep Layer Gas(‚H’©Ý'ª?–>Ï¥‹¨)[ J] .Well Logging Technology(©Ý/Œ), 1998, 22(9), Wang Shao-min(¦ö), Fu Rong-shan(°¸ó), et al. Analysis of Rock PoreThroat Structure with NMR Spectra(‚H’ö¥ûFd¤²s)[ J] . OilGeophysical Prospecting(F²¹oþØ>), 2003, 38(3):328- 333.[ 16]  Weng Ai-hua(Û¹¿), LiZhou-bo(ÙÚo), Wang Wei-nan(¦¿3), et al. ExperimentsinSalinity Effect onFluidNuclear Magnetic Resonance Property(€Ä@8‚H’ŸÉ•Y¥Lùî)[ J]. Well LoggingTechnology(©Ý/Œ), 2001, 25(6):401-404.[17]  Wang Wei-min(¦¹ö), Sun Dian-qing(äÉi), Miao Sheng(ì9).The Fundamental Study on NMR Log-ging(‚H’$Lùî)[ J] . 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Application of NMR on the Study of ReservoirPore Structure(‚H’%ªd#²ùîÏ¥‹¨)[ J] .Neijiang Technology(=~S/), 2005,(1):57,46.[24]  Zhang Song-yang(f¾), Fan Yi-ren(SR¥).Commentary on Nuclear Magnetic Resonance Logging(‚H’©Ý/Œß)[ J] .Progress in ExplorationGeophysics(>¹oþØÉZ), 2002, 25(4):21-26.[25]  Gao Min(Úù), An Xiu-rong(½®´), Zhi Shui-hua(~¿), et al. Evaluating Porous Structure of Reser-voir with MRIL Data(¨‚H’©Ý'ßN%ª¥d#²)[ J] . Well Logging Technology(©Ý/Œ),2000, 24(3):188-193.[26]  Matthias Appel.Nuclear magnetic resonance and formation porosity [ J] . Petrophysics, 2004, 45(3):296-149 »1ù   ¦½^©:²Ý"ÖNMR T2ö¥•YyÍ#T2©¸´¥’çZE307.[27]  Mo Xiu-wen(©Ó), Li Zhou-bo(ÙÚo), Mei Zhong-wu(¼Ñó).Interpretation Method and Applicationof Nuclear Magnetic Resonance Logging(‚H©Ý'¥³dZEЋ¨)[ J] . Well Logging Technology(©Ý/Œ), 1997, 21(6):424- 431.[28]  Bo Ling-hai(~1¼), Zhao Wen-jie(uÓ­).Evaluation Sand-gravel Heavy Oil Reservoirs by NMR Loggingand It's Application(‚H’©Ýéäû²²ŸßNÏ¥‹¨)[ J] . 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Low-field NMR methodfor bitumen sands characterization:Anew approach[ J] .SPE Reservoir Evaluation &Engineering, 2001, 4:88-96.[ 34]  Shao Wei-zhi(»½), Ding Wu-jiao(àΐ).MRIL-P NMRLogging Technique andIts Application(MRIL-P˜‚H’©Ý/Œ#‹¨)[ J] . Well Logging Technology(©Ý/Œ), 2002, 26(3):205- 212.[ 35]  Sun Jian-meng(äyÔ), LiZhao-cheng(Ùzî), Geng Sheng-chen(û3á), et al. On T2cutoffValue Determi-nation of Nuclear Magnetic Resonance Logging(‚H’©ÝT2cutoff’çZE))[ J] . Well Logging Tech-nology(©Ý/Œ), 2001, 25(3):175- 178.[ 36]  Que Hong-pei(š ¡), LeiBian-jun(ÂN+).Deriving Capillary Pressure Curvesfrom NMR T2 Spectra(‚H’T2öEØ°5âïwL8)[ J]. Journal of Southwest Petroleum Institute(2F²ÐýÐ),2003, 25(6):9-11,15.[37]  Hu Yi-liang(±[), Jiang Guo-fa(~SE).Development of Application Research on NMR Logging Tech-nique(‚H’©Ý/Œ‹¨ùî¥?Z)[ A] . LuDa-wei(dvÏ), Jiang Guo-fa(~SE), et al. The Theo-ry and Applicationof NMR Logging(‚H’©Ý؂Ћ¨)[ C]. Beijing(Ø):Petroleum Industry Press(F²ý<ñ), 1998.1-12.[38]  Huang Long-ji(ÛH).Theory of Nuclear Well logging(‚©ÝðØ)[ M]. Dongying(ê):University ofPetroleum China Press(F²vÐñ), 2000.[39]  MirotechnikK, Allsopp L, KantzasA. Determination of oil and water compositions of oil/water emulsionsu-sing low field NMR relaxometry[ J]. Petroleum Society, 2000, 95:1-6.150o  ö  Ð    ½         »23 Factors Affecting NMR T2 Spectra of Oil Well SamplesandMethods for Determining the T2 Cutoff ValueWANG Zhi-zhan1,2*, DENG Mei-yin2 , ZHAI Shen-de2 , ZHOU Li-fa1(1.Department of Geology, Northwest University, Xi’ an 710069, China;2.Geologging Company, Shengli Petroleum Administration Bureau, Dongying 257064, China)Abstract:Well-logging andmud-logging using nuclear magnetic resonance(NMR)tech-nology are basedon evaluationandinterpretationof T2 spectrum measuredfrom the rocksamplesexcavated from potentialoil wells. Many factorsmay affect
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