塔河油田优快钻井技术实践与认识

塔河油田上部地层疏松、可钻性好,钻井过程中易出现缩径阻卡现象;下部地层易剥落掉块、坍塌严重,易出现井下复杂情况或事故,且存在垂直裂缝或溶洞,易发生钻井液漏失。为此,塔河油田开展了优快钻井配套技术研究与应用,包括井身结构优化设计、钻头选型、井下动力钻具配合高效钻头快速钻进、防斜打快以及优质钻井液体系5项技术,使塔河油田钻井效率得到了极大提高——在保证成井率的前提下,平均机械钻速提高40%以上,平均钻井周期缩短30%以上,三叠系、石炭系地层井径扩大率控制在10%以内,单井套管节约150 t以上,单井钻井成本节约200万元以上,取得了显著的经济效益。

Application of Optimum Drilling Techniques in Tahe Oilfield

The upper formations of Tahe Oilfield are unconsolidated and have good drillability and thigh hole and pipe sticking is prone to happen.While the lower formations tend to slough and cause downhole troubles along with drilling fluid loss due to vertical fracture or caves.Therefore,Tahe Oilfield conducted studies on optimum drilling technologies,including optimization of casing design,bit selection,compounding drilling of mud motor and high efficiency bits,deviation control and fast drilling,and high quality drilling fluid,etc.Field application of these techniques show that the rate of penetration was improved by more than 40%;drilling cycle was reduced by more than 30%;the overcut of Triassic and Carboniferous was controlled within 10%,the casing was saved by more than 150 t and drilling costs was reduced by more than 2000 thousand RMB.A significant economic efficiency was obtained.