l:2008-03-18;:2008-04-25Te:A(1971),o,=,1994M87?,a124010)K1:低渗透油藏储层物性较差,通常油层在酸化压裂等工艺技术措施下,才可产出工业油流,对低渗透油藏有效储层进行测井解释较为困难。从冷家堡油田冷46区块的油藏特征出发,建立了一套有效厚度下限标准研究方法。为检测油层有效厚度划分精度,在取心井中选取5口井进行岩心厚度与测井厚度对比,层划准率达100%。并据此标准划分39口单井有效厚度,有效地保证油层射孔,为注水开发提供可靠的依据。1oM:r;/KS;1i;ms|:TE321DSM:AResearch on the minimum net pay thickness in low permeability reservoirsLiu Jinyun(Exploration and Development Research Institute of Liaohe Oilfield Company, CNPC, Panjin 124010)Abstract:Physical property is bad in low permeability reservoir, and commercial oil flow cant be obtainedwithout acid fracture process.Log interpretation is difficult for productive reservoirs.Based on reservoircharacteristics of Leng 46 block in Liaohe Oilfield, a set of method studied on net pay thickness standardwas established.In order to detect dividing precision of net thickness, 5 wells in coring wells were selectedto compare with core thickness and log thickness.Dividing precision ratio is 100%.The net thickness ofsingle well had been determined in 39 wells, and it ensured success of layer perforation effectively andprovided reliable evidence for waterflood development.Key words:net pay thickness;the minimum net pay thickness;low permeability reservoir;physicalproperty;electric propertyEB46uvJ,98/,/1id4v1 。yN,z7?,A1r/KS。1r/Kr%12%,K 110-3m2P(l110-3 m21iq8s);HE,|Pc(50)d#1iqsYy1(m2、m3),/K11%,K 0.910-3 m2。VAB,K/K11.5%,K 0.910-3 m2。1.2rSSL=srTS,|、kkMy、YS。B_Eq2oHTyS1owL4-7。m146uvd#1iqmFig.1 Porosity-permeability crossplot of Leng 46 blockm246uvd#1Fig.2 The relationship of porosity andmedian pressure of Leng 46 blockm346uv1iq1Fig.3 The relationship of permeability andmedian pressure of Leng 46 block1.2.1测井曲线标准化wLV1,39gwLS。wLSsdnn。wLdnPM#WwLBS=dBY。MWdn|usMCS,WwLS;Wdn|BS3700(V1 900gM1d9,yMnZ。wLsY,SwL?LQY+。S=,nnSnVj。EqwLYy,4n;HwL_nZESrn。1.2.2电性标准1:|283A.1ir/KS71Yd9,HwLMY(m4)。cC(C)_Eql7 m,d%,_Eqv7 m%。HwLV|%s,c%,Hv80 s/ft;%,H72 80 s/ft;,Hl72 s/ft。m446uvHEq1Fig.4 The relationship of time-difference andresistivity of Leng 46 blockc1:46uv%cWz。k、gyHEqm(m5),2oHv71s/ft,_Eqv8 m,cv45%;cyHEqm,S-B,=z。8,、s、k、gZ$,YV“1”,8r/KS(V1)。m546uvHEqm(k、g)Fig.5 Crossplot of time-difference andresistivity of Leng 46 blockV146uvrSTab.1 Net thickness standard of Leng 46 blockc%11.5%K 0.910-3m2S oi45%t71s/ftR t8m2rT_rd,|5gd1。s5:|lqv90%;c、cc;v0.4 m;%)。5gs46.8 m,47.0 m,0.2m,q100%(V2)。rdV21VTab.2 Comparison of core thickness with log thickness|cQlq,%|/m/m/m9419 100.020 99.75758581.2 1.0 -0.22.7 2.8 0.12.7 2.3 -0.42.0 2.2 0.2953 97.5 484 98.0 486 95.1 607 95.1 605.4 5.6 0.20.7 0.6 -0.12.8 3.2 0.41.4 1.2 -0.22.3 2.0 -0.35.0 7.0 2.0161 5 98.0 34 4.8 4.2 -0.66 97.9 36 6.1 7.2 1.1162 4 94.3 37、38 5.4 4.3 -1.1168 2 100.0d1.2 1.8 0.63 97.2 19、20 3.1 1.6 -1.5946.8 47.0 0.2072 海洋石油 2008M9SL=z,S.,.Br+1i%rZE J.viF7?,1999, 18(5):46-48. 7_,fy,S,.YEqd%ZE# J.viF7?,2005,24(6):97-99.S