1习题一1.已知一六边形泄油面积为24105m,其中心一口井,井底半径mrw1.0,原油体积系数15.10B,表皮系数S=3,油井系统试井数据见表.试根据所给的测试资料绘制IPR曲线,并求采油指数0J,地层压力rP,流动系数00hk及井底流压MPaPwf5.8时的产量.流压11109.59产量1839.550.361解:⑴IPR曲线如下:036912010203040506070⑵MPadmppqqJwfwf3211205.219111861⑶外推IPR曲线与纵轴相交得MPapr12⑷aSXBJhk2)43(ln0000378.12631.0/)105(565.0565.021421wrAX)/(43.04.862)43378.1263(ln15.15.21200sMPamumshk⑸当时5.8wfpdmpPJqwfr30025.75)5.812(5.21)(2.已知某井的油层平均压力MPapr16,当井底流压MPapwf12时,测得产量dmq306.25.试计算①max0q②当MPapwf8时的产量(+采油指数)③绘制该井的IPR曲线。2解:①由2max00)(8.0)(2.01rwfrwfppppqq得:max0q=])(8.0)(2.01[20rwfrwfppppq=)(64])1612(8.0)1612(2.01[6.2532dm②当MPapwf8时])(8.0)(2.01[2max00rwfrwfppppqq=64dm328.44])168(8.0)168(2.01[采油指数:方法1:MPadmMPadmPpqJwfro/6.5/8168.4433方法2:MPadmMPadmpPpqdpdqJrwfrowfo/4/1686.1162.0646.12.03322max③为绘制IPR曲线。计算不同wfp时所对应的产量,如下表:产量57.644.825.6640流压481201604812160102030405060703.已知某井,14MPapr.brpp当MPapwf11,产量为,7.0,3030FEdmq试计算:3①0.1max0FEq②7.0max0FEq③当时的产量。和,而2.10.17.09FEMPapwf解:①MPaFEppppwfrrwf9.117.0)1114(14)(由0.1max00FEqq2)(8.0)(2.01rwfrwfpPpP得/00.1max0qqFE[2)(8.0)(2.01rwfrwfpPpP]dm32119])149.11(8.0)149.11(2.01[30②当时,0wfpMPaFEppppwfrrwf2.47.0)014(14)(7.0max0FEq=0.1max0FEq[2)(8.0)(2.01rwfrwfpPpP]])142.4(8.0)142.4(2.01[1192)(3.1033dm③时对于当7.0,9FEMPapwfMPaFEppppwfrrwf5.107.0)914(14)(0q=0.1max0FEq[2)(8.0)(2.01rwfrwfpPpP]=119×[2)145.10(8.0)145.10(2.01]=47.6dm3对于FE=1.0时,MPaFEppppwfrrwf91)914(14)(0q=0.1max0FEq[2)(8.0)(2.01rwfrwfpPpP]=119×[2)149(8.0)149(2.01]=64.4dm3对于FE=1.2时,MPaFEppppwfrrwf82.1)914(14)(0q=0.1max0FEq[2)(8.0)(2.01rwfrwfpPpP]4=119×[2)148(8.0)148(2.01]=74.3dm34.已知某井的,14MPapr.brpp当MPapwf12,产量为,3.2,3530FEdmq试计算:①0.1max0FEq②3.2max0FEq③当时的产量。,和而0.33.28FEMPapwf解:①MPaFEppppwfrrwf4.93.2)1214(14)(由0q/0.1max0FEq=)](792.1exp[2.02.1rwfpp得0.1max0FEq=0q/{)](792.1exp[2.02.1rwfpp}=35/{)]144.9(792.1exp[2.02.1}=65.6dm3②当时,0wfpMPaFEppppwfrrwf2.183.2)014(14)(0所以不能用standing公式.用Harrison公式0.1max3.2max0FEoFEqq[)](792.1exp[2.02.1rwfpp=65.6×{)]142.18(792.1exp[2.02.1}=77.4dm3③当时,MPapwf8对于FE=2.3时,MPaFEppppwfrrwf2.03.2)814(14)(0q=0.1max0FEq{)](792.1exp[2.02.1rwfpp}=65.6×{)]142.0(792.1exp[2.02.1}=65.3dm3对于FE=3.0时,MPaFEppppwfrrwf40.3)814(14)(50q=0.1max0FEq{)](792.1exp[2.02.1rwfpp}=65.6×{)]144(792.1exp[2.02.1}=70.9dm35.已知某井,16MPaprMPapb13当MPapwf15,产量为,2530dmq试计算:①J②bq③maxq④wfp=10Mpa时的产量和采油指数.解:①当wfp=15MPa>bp时,q=25dm3∴J=q/(rp-wfp)=25/(16-15)=25MPadm3②bq=J(rp-bp)=25(16-13)=75dm3③cq=8.1bJP=258.113=180.6dm3maxq=bq+cq=75+180.6=255.6dm3④当wfp=10Mpa时0q=bq+cq[2)(8.0)(2.01bwfbwfpppp]=75+180.6×[2)1310(8.0)1310(2.01]=142.3dm3采油指数:方法1:MPadmMPadmppqJwfro/72.23/10163.14233曲线方法2:MPadmMPadmpPpqdpdqJbwfbcwfo/88.19/13106.1132.06.1806.12.03322曲线6.已知某井,16MPaprMPapb13当MPapwf8,产量为,8030dmq试计算:①J②bq③maxq④wfp=15Mpa时和wfp=6Mpa时的产量和采油指数.6解:①当wfp=8MPa<bp时,q=80dm3J=0q/{(rp-bp)+8.1bp[2)(8.0)(2.01bwfbwfpppp]}=80/{(16-13)+8.113×[2)138(8.0)138(2.01]}=11.2MPadm3②bq=J(rp-bp)=11.2(16-13)=33.6dm3③cq=8.1bJP=11.28.113=80.9dm3maxq=bq+cq=33.6+80.9=114.5dm3④当wfp=15Mpa>bp时0q=J(rp-wfp)=11.2(16-15)=11.2dm3当wfp=6Mpa时0q=bq+cq[2)(8.0)(2.01bwfbwfpppp]=33.6+80.9×[2)136(8.0)136(2.01]=93.2dm3当wfp=6Mpa时采油指数:方法1:MPadmMPadmppqJwfro/32.9/6162.9333曲线方法2:MPadmMPadmpPpqdpdqJbwfbcwfo/84.5/1366.1132.09.806.12.03322曲线7.已知某油藏的平均压力rP为KPa210200,饱和压力bP为KPa210240,试油测试井底流压wfP为KPa210100时,地面产油量为dm/0.403,8.0FE,试7计算:(1)流动效率FE分别为1.0和0.8时的该井最大可能产量;(2)8.0FE,KPaPwf210160时的产量和采油指数。解:(1)MPatestPwf10,dmqo/0.403,brtestwfPPP题中已知:8.0FE,当MPaPwf10时,MPaMPaFEppppwfrrwf128.0)1020(20)(1则FE=1.0时,dmmPPPPqqrwfrwfoFE/6.6720128.020122.01/408.02.01/3322'1'10.1max0——FE=0.8时,当MPaPwf0,取得8.0max0FEqMPaFEppprrwf48.0)020(20)0(2dmmPPPPqqrwfrwfFEoFE/7.622048.02042.016.678.02.013322'2'20.1max8.0max0——(2)FE=0.8,MPaPwf16,MPaMPaFEppppwfrrwf8.168.0)1620(20)(3dmmPPPPqqrwfrwfFEoo/1.18208.168.0208.162.016.678.02.013322'3'30.1max——采油指数:方法1:8MPadmMPadmPqJwfo/525.4/16201.18Pr33—曲线方法2:由上式求导可得:因为,FEppppwfrrwf)(所以,FEdpdpwfwf'2'0.1max'6.12.0——rwfrFEowfoPPPqdpdqFEPPPqdpdpdpdqdpdqJrwfrFEowfwfwfowfo2'0.1max''6.12.0——8.0FE,KPaPwf210160时的采油指数MPadmJ/175.48.0208.166.1202.06.67328.已知某油藏的平均压力为KPa210300,饱和压力为KPa210240,试油测试井底流压为KPa210200时,地面产油量为dm/0.503,流动效率为0.8,试计算:(1)流动效率分别为1.0和0.8时的该井最大可能产量;(2)流动效率为0.8,井底流压为KPa210160时的产量和采油指数。解:(1)已知:MPaPr30,MPaPb24,MPaPtestwf20,dmqtesto/503则有:testwfbrPPP,即先单相流,后两相流题中是FE=0.8时的情况,MPaPtestwf20,MPaMPaFEPPPpwfrrwf228.0)2030(30)(1MPaMPaFEPPPpbrrb2.258.0)2430(30)(9MPadmMPadmPPPPPFEPPPPPPtestqJbwfbwfbbrrbbroFE