普光气田空气钻井取心技术  

Air Drilling Coring Technology Used in Puguang Gas Field

作　　者：黄松伟[1] 

机构地区：[1]中原石油勘探局钻井四公司,河南濮阳457321

出　　处：《石油钻探技术》2009年第3期110-113,共4页Petroleum Drilling Techniques

摘　　要：为了开展对普光气田上部陆相地层的岩性研究,进一步提高普光气田钻井速度,在普光107-1H井和普光3011-5井进行了空气钻井取心作业,这也是我国首次进行空气钻井取心。针对空气钻井取心存在的润滑性差、摩擦过热、钻具震动大等技术难点,优选了取心钻头和钻井参数,简化了取心钻具组合,并将取心筒的悬挂轴承改进为耐高温高压的空气冷却密封轴承,岩心爪总成由缩径套式改为加长卡紧套式,保证了两口井空气钻井取心作业的成功。普光107-1H井岩心收获率87.25%,取心平均机械钻速0.28m/h;普光3011-5井岩心收获率79.34%,取心平均机械钻速2.71m/h。采用空气钻井取心解决了常规取心造成的岩心污染问题,客观真实地反映了地层情况,为深入开展地层研究评价,促进普光气田的勘探开发提供了重要的科学依据。Air drilling coring operation, the first of gas drilling coring at home, was conducted on wells Puguang 107-1H and Puguang 3011-5 in order to investigate the lithology of the upper terrestrial formation and to improve drilling speed. Considering the technical challenges arising from air coring, including bad lubrication, high friction temperature, severe drill string vibration, etc, the drill bit and drilling parameter were optimized, the drilling assembly was simplified, the suspension bearing of coring barrel was changed into air-cooling sealing bearing, and the sleeve coring gripper was changed into extended clamping sleeve. All these measures ensure the coring success in two wells. The coring recovery in wells Puguang 107-1H and Puguang 3011-5 are 87.25% and 79.34%, and average drilling speed in these two wells are 0. 28 and 2.71 m/h. Air drilling coring avoids core damage caused by conventional coring, which is helpful to determine formation lithology and to provide significant foundations to promote development of Puguang gas field.

关 键 词：空气钻井 取心 取心工具 岩心收获率 普光气田 

分 类 号：TE244[石油与天然气工程—油气井工程]