论文部分内容阅读
美国得克萨斯州北部的Barnett页岩是一个非常规气藏,目前估计展布面积为54000mile2(1mile2=2.59km2)。无效造缝是Barnett页岩水平井完井中重新出现的最大难题,主要表现在其具有高的造缝压力和裂缝扩展压力,从而导致低注入速率和高作业压力。这种缺陷降低了压裂支撑剂替置效率和激产效率。如果钻井活动2～3年持续增加,造缝难题就成为目前经费和误工问题的真正根源。A·A·Ketter等人调查了256口Barnett页岩水平井,力求找出这些近井地带问题的原因,为改善今后的完井作业提供解决方案。他们推荐一种优化完井方法,可减少近井地带问题,增加激产面积,降低计划外的完井费用。
The Barnett Shale in northern Texas in the United States is an unconventional gas reservoir with an estimated area of 54000mile2 (1mile2 = 2.59km2). Invalidation is the most significant problem reappearing in Barnett Shale horizontal well completions, mainly due to its high stitching pressure and crack propagation pressure, resulting in low injection rates and high operating pressures. Such defects reduce the replacement efficiency and excision efficiency of the fracturing proppant. If the drilling activities continue to increase 2-3 years, the problem of making seams has become the real source of current funding and the problem of lost-working. A · Ketter et al. Investigated 256 Barnett shale horizontal wells and sought to identify the causes of these near-wellbore problems and provide solutions to improve completion operations in the future. They recommend an optimized completion method to reduce near-wellbore problems, increase excitatory area, and reduce unplanned completion costs.