一种新的钻井井身质量评价方法

A new evaluation method for wellbore quality

李琪 王涛 王再兴 张成秀 张立君

LI Qi WANG Tao WANG Zaixing ZHANG Chengxiu ZHANG Lijun

西安石油大学，陕西西安　710065 中国石油新疆油田分公司，新疆克拉玛依　834000 川庆钻探钻采院长庆工程院，陕西西安　710018

Xi’an Petroleum University, Xi’an 710065, China Xinjiang Oilfield Company, CNPC, Karamay 834000, China Changqing Engineering Institute of Chuanqing Drilling & Exploration Co. Ltd., Xi’an 710018, China

准确、全面地评价井身质量在钻井质量评价中占有至关重要的地位。传统的显性井身质量评价大多只能得到单项的评价报告，并未考虑下套管过程对井身质量的反映。在分析国际钻井承包商协会（IADC）钻头磨损分级系统及格拉斯哥昏迷评分方法（GCS）的基础上，结合井身质量影响因素，提出了一种新的井身质量评价方法——井身质量计分卡方法，该方法针对钻井作业的整个过程，通过分析扭矩和摩阻来评价井身质量，并可对井身质量进行分级，具有简单、可靠和使用灵活的特点。井身质量计分卡方法还有利于不同油田不同区块井身质量的比较，可为甲方钻井监督及乙方井身质量控制提供了一个有力的工具。其应用也将强化施工人员对导致低井身质量因素的认识，从而间接提高钻井完井质量。

Accurate and comprehensive evaluation of wellbore quality is of great importance in drilling quality evaluation. The traditional explicit wellbore quality evaluation mostly leads to an evaluation report of single item, not considering the effect of casing running on wellbore quality. Based on analysis of IADC bit wear classification system and GCS (Glasgow Coma Score) method, and in conjunction with factors affecting the wellbore quality, a new wellbore quality evaluation method is presented — wellbore quality scorecard approach. This method will evaluate the wellbore quality through analyzing the torque and friction drag during the whole drilling process and will classify the wellbore quality; it is easy, reliable and flexible to use. The scorecard for wellbore quality is also helpful in comparing wellbore quality in different oilfields and blocks, and can be a useful tool for Party A drilling supervision and Party B wellbore quality control. Its application will also enhance the understanding of drilling crew on factors leading to low wellbore quality, so as to improve wellbore drilling and completion quality indirectly.

10.13639/j.odpt.2015.02.001