長(zhǎng)城鉆探近鉆頭短節(jié)技術(shù)參數(shù)

1、長(zhǎng)城鉆探近鉆頭短節(jié)技術(shù)參數(shù)GW-Near Bit Geosteering Instrument1. Brief IntroductionNear-bit measuring technology is a cutting-edge MWD and LWD technology, and also it' s the edge tool to precede high-end drilling technical service. This instrument is mainly applied in thin reservoir horizontal well drilling, o

2、il (oil and water layer) boundary drilling, etc. It increases pay-zone drilling rate, single well production and recovery factor, and also it reduces development and production cost, achieve the efficient oil field development.The characteristic of its short size (only Im length) let it can be insta

3、ll behind the bit directly, and receive the real time geologic parameter and borehole trajectory parameters from the position less than one meter to downhole.2. Technical ParametersTool ODMax Operating Temp Max. PressureContinuous Operating Times Short Hop Transmission Distance InclinationInclinatio

4、n Measurement Accuracy6?”150° C 20000psi >150h >20m 0"180°±0. 5° INC>300Measuring Range Measuring Accuracy Inclination Azimuth Angle Tool Face Inclination Azimuth Angle Tool Face 0180 03603 0360 ±0.1° ±0.25, ±0.5。 Directional Gamma module：? Boreh

5、ole imaging： 8 sectors, each 45c ? Measuring range: 0-380 API ? Measuring accuracy: ±3 API 50 API ? Max temperature: 150 °C ? Max pressure: 20, 000 psiNear bit ResistivityFrequency IMhzRange AccuracyAmplitude O.lTOOC.m Phase0. 1-200 Q . mAmplitude ±8% (0. 1-25 ?. m) ; ±2 s/m(>

6、25?. m)Phase ±5% (0. l-30 Q . m) ; ±0. 6s/m(>30?. m)AmplitudeDepth of InvestigationPhaseVertical Resolution32" Rxo=l?. m, Rt=10?. m55" Rxo=10?. m, Rt=100?. m 20 ' Rxo=l?. m, Rt=10?. m34" Rxo=10?. m, Rt=100?.mAmplitude 12" Phase8 ' GeoVision R6 Lateral Logging

7、0. 35mGamma Imaging Near Bit Wired N 150"CGW-NBElectromagnetic Wave Logging lmGamma Imaging Near Bit Wireless Y1503. Comparison with Similar EquipmentInstrument Name Method of measurement Max. Depth of investigation Borehole imaging Distance to downholeDownhole data transmission Remote software

8、 update Working temperatureStarTrak Lateral Logging 0. 35mElectrical Imaging Near Bit Wired N 150°C長(zhǎng)城近鉆頭地質(zhì)導(dǎo)向系統(tǒng)1、應(yīng)用領(lǐng)域近鉆頭測(cè)量?jī)x目前是國(guó)際隨鉆測(cè)量技術(shù)中的前沿技術(shù)，應(yīng)用于薄油層水平井鉆井、油 層(油水層)邊界鉆井等，提高油層鉆遇率，從而提高單井產(chǎn)量及采收率，降低開(kāi)發(fā)與生 產(chǎn)成本，實(shí)現(xiàn)油田的高效開(kāi)發(fā)。近鉆頭測(cè)量?jī)x與鉆頭連接，測(cè)點(diǎn)距鉆頭0.5米，可實(shí)時(shí)獲 得近鉆頭地質(zhì)參數(shù)和軌跡參數(shù)。2、系統(tǒng)主要技術(shù)指標(biāo)及關(guān)鍵技術(shù)相位電阻率：0.1-200 Q.m幅度電阻率：0.1-100 Q