作　　者： ; ; ; ; ;

机构地区： 中国石油天然气集团公司

出　　处： 《天然气工业》 2012年第2期60-62,117-118,共3页

摘　　要： 针对准噶尔盆地车排子—中拐地区钻井过程中井壁坍塌严重、钻井液固相含量高、钻头泥包严重、钻井速度低等问题,优选出一种快钻剂,在此基础上研发出一套快速钻井液体系。评价结果显示:快钻剂KSZJ与现场钻井液体系配伍性好,能很好地吸附于钻柱、井壁及钻屑表面,改善钻井液的润滑性能及抑制性能。现场应用结果表明:该快速钻井液体系具有抑制能力强,性能稳定(抗温达160℃,抗盐10%,钻屑回收率超过80%),润滑、防卡、防塌、防泥包和减阻性能好,机械钻速快等优点;与邻井相比,使用该快速钻井液的井平均机械钻速提高了60%以上,明显减少了井下复杂情况,显著降低了钻井风险和综合成本,对及时发现该区油气资源和保护油气储层也起到了良好的作用。 This paper aims to solve many problems which easily occur in the drilling process in the Chepaizi-Zhongguai area of the Junggar Basin,such as wellbore collapse,a relatively high content of solid phase in the drilling fluids,bit balling,low penetration rates,etc.Thus,based on an optimized fast drilling additive,a fast drilling fluid system is developed.An evaluation and analysis shows that this fast drilling additive of KSZJ has a good compatibility with the on-site drilling fluids and can improve the lubrication and inhibition performance because it is easily adsorbed at the surface of drilling string,borehole wall,and drilling cuttings.Field application shows that this developed fast drilling fluid system has many good advantages including strong inhibition performance,steady properties with heat resistance up to 160 ℃,salt tolerance degree of 10%,and cuttings recovery rate of over 80%,as well as anti-sticking,anti-sloughing and anti-bit balling,a high drag reduction efficiency,and a high penetration rate.Compared to the neighboring wells,the average ROP of this pilot well with the developed fast drilling fluid system was enhanced by more than 60%,meanwhile the complicated downhole accidents were significantly reduced and drilling risk and comprehensive cost were decreased to a high degree.With all the above good results obtained,this newly developed fast drilling fluid system plays an important role in tapping more hydrocarbon resources timely and protecting reservoirs reasonably in this study area.

关 键 词： 准噶尔盆地 车排子 中拐地区 快钻剂 快速钻井液体系 吸附 润滑 抑制 机械钻速

领　　域： [石油与天然气工程]