DQNBMS-1型近钻头随钻测量系统的研制与应用

Development and field application of DQNBMS-1 near-bit measurement while drilling

杨志坚 齐悦 吴党辉 张欣

YANG Zhijian QI Yue WU Danghui ZHANG Xin

大庆钻探工程公司钻井工程技术研究院，黑龙江大庆　163413

Drilling Engineering &

常规随钻测量系统（LWD）参数测点滞后钻头较远，测量信息滞后，导致油田薄差油层砂岩钻遇率低，储层未得到有效地开采。通过对近测量主测总成壳体结构和电路小型化、低功耗等设计，研制了三参数测点距钻头均小于1 m的DQNBMS-1型近钻头随钻测量系统。通过DQNBMS-1系统多参数近距离测量的实时数据，可以及时掌握井底的井斜、辨别地层变化、判断钻头与储层的相对位置和调整轨迹，提高砂岩钻遇率。现场应用证明，该系统测量数据准确、工作稳定可靠，施工井段获取了较高的砂岩钻遇率。通过与LWD应用效果对比，该系统更利于地层特性的判断和钻头在储层内的高精度控制，砂岩钻遇率提高了15%，可为薄差油层的开发提供有利的技术支持。

The parameter measuring point of regular measurement while drilling system is far from the bit, and the measurement information is lagging to be obtained, resulting in lower ratio of penetrating thin sandstone and ineffective development of the reservoir. DQNBMS-1 near-bit measurement while drilling system was developed, with the distances of three parameter measuring points to bit less than one meter, by the innovative design of near-bit measurement sub configuration and the design of miniaturized and low power consumption electrocircuit. Through the real-time measurement data of many parameters with near distance, we can master the inclination at the bottom of a well, distinguish stratigraphic fluctuation, judge the relative position of the bit and reservoir, adjust well trajectory in time, and improve the ratio of penetration. The accuracy and reliability of DQNBMS-1 and higher ratio of sandstone penetration are proved in field application. Compared with LWD, DQNBMS-1 is more beneficial for the judgment of formation characteristics and the high-accuracy bit control in the reservoir, and the ratio of sandstone penetration is increased by 15%, offering a powerful technical support for exploiting thin sandstones.