Research and Application of Engineering Scheme of Instrument while Drilling in Coalbed Methane Horizontal Wells——A Case Study in Anze Block of Qinshui Basin
This paper takes the Anze Block in Southern Qinshui Basin as an example to study engineer-ing geological factors,geo-steering parameters,anti-collapse drilling,etc.The aim is to enhance the safety and efficiency of coalbed methane drilling through the use of instruments while drilling.The No.3 coal seam in Anze Block has the characteristics of multiple interlayers with gangue and the development of a coal-rock fragmentation structure.By combining engineering technology with geological requirements,the optimization of guidance plans and measures is carried out,and a suitable instrument while drilling operational template is developed for this area.In this paper,near-bit azimuth gamma geo-steering tech-nology is applied in the field to correct and control the real drilling track of the A13 Well.The on-site construction proceeded smoothly,with a cumulative drilling footage of 882m in the horizontal coal seam section and a drilling rate of 94.89％.This proves that the instrument while drilling the operational tem-plate in Anze Block is feasible.
Coalbed methane horizontal wellnear-bit gammageo-steeringAnze in Southern Qinshui Basin
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