摘要
塔河油田12区上部地层疏松、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。在分析了塔河油田12区地层特点及钻井技术难点的基础上,给出了适合该地区深井钻井的优快钻井技术,主要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、井眼稳定技术、井眼畅通技术、防斜打快及优质钻井液体系等技术,使塔河油田12区钻井效率得到了极大提高。多口井的钻井实践表明,塔河油田平均钻井速度大幅提高,平均钻井成本不断降低,对油田增储上产、提高勘探开发速度起到了积极的作用,取得了显著的经济效益。
The upper formations of the block-12 in Tahe oilfield are unconsolidated and easy to be drilled and tight hole and pipe sticking are prone to happen.While the lower formations tend to slough and cause down hole troubles along with drilling fluid loss due to vertical fracture or caves.On the basis of detailed analysis on formation characteristics and drilling technical challenges in the block-12 in Tahe oilfield,a series of scientific drilling technologies suitable for deep wells in the area are presented,including optimization of casing design,bit selection,compounding drilling of mud motor and high efficiency bits,keeping stable and unobstructed wellbore,deviation control and fast drilling,and high quality drilling fluid,etc.Field application of these techniques show that the rate of penetration was improved greatly.Drilling practices in wells indicate that the drilling speed is increased remarkably;drilling cost is reduced increasingly.The technology plays an active role in enhancing oil exploration,production and development speed,a significant economic efficiency was obtained.
出处
《新疆石油天然气》
CAS
2010年第3期76-81,共6页
Xinjiang Oil & Gas
