长城钻探近钻头短节技术参数

1、长城钻探近钻头短节技术参数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长城近钻头地质导向系统1、应用领域近钻头测量仪目前是国际随钻测量技术中的前沿技术，应用于薄油层水平井钻井、油 层(油水层)边界钻井等，提高油层钻遇率，从而提高单井产量及采收率，降低开发与生 产成本，实现油田的高效开发。近钻头测量仪与钻头连接，测点距钻头0.5米，可实时获 得近钻头地质参数和轨迹参数。2、系统主要技术指标及关键技术相位电阻率：0.1-200 Q.m幅度电阻率：0.1-100 Q