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针对南阳凹陷张店区块的地质特征及长裸眼大斜度定向井对钻井液的特殊要求,优选了聚合物防塌润滑钻井液体系,并制订了相应的维护处理措施。介绍了2口井的应用情况及效果。实践表明,选用的聚合物防塌润滑钻井液体系悬浮携带、护壁防塌和润滑防卡能力强,避免了井下复杂情况的发生,能够满足长裸眼大斜度定向井的施工需要。
According to the geological characteristics of Zhangdian block in Nanyang sag and the special requirements of drilling fluid for the long-skew directional well of naked-eye, the polymer anti-collapse lubrication drilling fluid system is optimized and corresponding maintenance measures are formulated. The application and effect of two wells are introduced. Practice shows that the selected polymer anti-collapse lubrication drilling fluid suspension system, anti-collapse of the wall and lubrication anti-card ability to avoid the occurrence of complex underground well to meet the needs of the construction of long-hole high-angle directional well.