井眼軌跡測量計算課件

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1、懸錘原理測量鉆孔頂角示意圖Inclination:Toolface:Magnetic NorthEarths Gravitational FieldVertical地磁場定向原理圖鉆孔方位角示意圖兩個同樣的線圈反方向繞線。交變電流通過主線圈產生磁場使芯飽和。如無外磁場，則電壓為零，因為線圈反方向。但是，若有外磁場存在，則一個鐵芯會比另一鐵芯提前飽和，引起電壓輸出錯相位，產生電壓脈沖。因此設置在與外磁場一定角度的檢測線圈會產生一個與通過磁環磁流變化率大小相對應的電壓。而這個電壓的大小也與外磁場強度相對應。所以三軸磁通門可以測定地球磁場沿三個正交軸線的分量。GGZ22yxGGzyxGGGtg22井

2、斜井斜:yxGGtgGTF 高邊工具面角（GTF):GTFGyGx磁工具面角（MTF):yxHHtgMTF GHZ)()()(2212xxyyzyxzxyyxGHGHGGGHGHGHGVVtg方位方位:HyHxV1V2Mag.North222zyxGGGG驅動器電子測量/定向短節旋轉閥脈沖器電池圖圖1 常見發射天線示意圖常見發射天線示意圖（a）垂直磁場天線）垂直磁場天線（b）環形線圈耦合垂直電場天線）環形線圈耦合垂直電場天線（c）直接耦合垂直電場天線）直接耦合垂直電場天線圖圖3 天線延長式天線延長式EMMWD在深海鉆進中的應用在深海鉆進中的應用HSENABABAB12MI2-I11I1A1 E

3、ast NorthNorthI2 MD=R1(I2-I1)(rad)2EastLength of arc of circle,L=RradA1R1LMD18018022IIMD 12121121I sinI sinIIMD180I sin RI sin RVertR1 VertI2 MD2111IcosRIcosRHorizR1R1I1I2I2)IcosI(cosIIMD1802112211IcosIcosRHoriz HorizNA1A2L2 East2 NorthR21OA2A2-A1A1L2=R2(A2-A1)RADEast =R2 cos A1 -R2 cos A2 =R2(cos A

4、1-cos A2)1222AAL180Rso,DEG 1212121AAII2AcosAcosIcosIcosMDEast=R2(cos A1-cos A2)1222AAL180R)IcosI(cosIIMD1802112L22180East=12121221AAIIAsinAsinIcosIcosMDNorth=R2(sin A2-sin A1)1222AAL180R)IcosI(cosIIMD1802112L22180North=)()sin()sin()()()cos()cos()cos()cos()()()sin()sin()cos()cos(12121212212112121221I

5、IIIMDVertAAIIAAIIMDEastAAIIAAIIMDNorth With all angles in radians!1212AAAAsinsin 1221AAAAcoscos 1221IIIIcoscos 1221IIIIcoscos1212IIIsinIsin1I1 MD 2I2I2I20Vertical Projection MD 221Icos2MDIcos2MDVert21Isin2MDIsin2MDHoriz 221121221121AIAI2MDA2HorizA1HorizEastAIAI2MDA2HorizA1HorizNorthsinsin,sinsinsin.

6、sin.cossin,cossincos.cos.N EA1A2 Horiz.1 Horiz.2Horizontal Projection1222112211IcosIcos2MDVertAsinIsinAsinIsin2MDEastAcosIsinAcosIsin2MDNorthRFIcosIcos2MDVertRFAsinIsinAsinIsin2MDEastRFAcosIsinAcosIsin2MDNorth1222112211PrOrRDLQDL 22DLtanDL2RF)AA(cos1IsinIsin)I(Icos(DL)cos:follows as calculated is DL

7、,angle,egoglD The122112DL=SPQR ArcSRPSRFDLr2DLtanr2DLtanr A curve representing a wellbore between Survey Stations A1 and A2.(A,I)DL)cos()sin()sin()cos()sin(22222IMDVertAIMDEastAIMDNorth 2cos2cos2sin2sin2sin212,12,121212,12,121212,12,1LHLNLE孔內測斜儀器的長度STLSTLSTLLHSTLSTLLNSTLSTLLE)cos()cos()cos(2)cos()si

8、n()cos()sin()cos()sin(2)sin()sin()sin()sin()sin()sin(22122,12,12222112,12,12222112,12,1)cos()cos()sin()sin()sin(22,12,1222,12,1222,12,1LHLNLE )()sin()sin()()()sin()sin()cos()cos()()()cos()cos()cos()cos(12122,12,1121212212,12,1121221212,12,1LHLNLE)cos()cos(2)cos()sin()cos()sin(2)sin()sin()sin()sin(2122,12,122112,12,122112,12,1LHLNLE修正系數RFRFRFRF)cos()cos(2LH)cos()sin()cos()sin(2LN)sin()sin()sin()sin(2LE211,21,222111,21,222111,21,2