保护储层钻井液优化设计新方法及其应用

NEW OPTIMIZED DESIGN METHOD AND APPLICATION OF DRILLING FLUID USED FOR FORMATION DAMAGE CONTROL

近年来,国内外均高度重视油气层保护技术的发展和领域的拓宽。暂堵技术是保护储层钻井完井技术的主要技术之一。针对中原油田特殊工艺井,开展了复杂地质条件下储层保护技术研究。采用一种理想充填新方法,对保护储层的钻井液暂堵方案进行了优化设计。实验结果表明,采用新方法可进一步提高储层岩心的渗透率恢复值,有利于更好的保护储层。

Formation damage control technology is paid great attention in resent years. Temporary plugging technology is one of the main drilling and completion techniques for reservoir protection. According to the features of non - conventional wells in Zhongyuan oilfield , the paper discusses the research of formation damage control technology in complex geologic condition. The 'Ideal Packing Theory' is used to optimize temporary plugging project of drilling fluid for formation damage control. Compared to traditional design method, the experimental results indicate that the new method can obviously increase return permeability of core and obtain better effect for formation protection.