嵩县某金矿区复杂地层强抑制防塌泥浆技术
投稿时间:2021-05-10  修订日期:2021-09-22  点此下载全文
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孟祥瑞 河南省有色金属地质矿产局第四地质大队 451464
中文摘要:嵩县某金矿区钻遇地层复杂,岩石破碎,部分地层绿泥石化、高岭石化严重,钻进过程中缩径、垮塌、漏失、涌水等多种复杂情况频发,断钻杆、粘卡、烧钻等事故层出不穷。在对比临近矿区施工经验的基础上,总结了本地区钻孔施工的技术难点,对比分析了分散泥浆、无固相聚乙烯醇泥浆、低固相聚合物泥浆的使用效果。结果表明,高浓度膨润土浆具有防塌、防漏、胶结松散岩石等多种功能,配制简单且使用方便,可用于上部覆盖层钻进。对于下部复杂地层,常规分散泥浆体系抑制性不足,难以应对该矿区复杂工况;无固相聚乙烯醇泥浆前期防塌能力强,但是处理坍塌事故能力不足;低固相聚合物泥浆体系抑制性强,流变性良好,防塌能力强,取得了良好的使用效果。
中文关键词:瑶沟金矿  复杂地层  绳索取心  防塌泥浆
 
Strong Inhibitive Drilling Fluid Technology Used in Complex Strata of a Gold Mineral Area in Song County
Abstract:Complex strata will be encountered when drilling in a gold mineral area in song county, such as unconsolidated formations, chloritization formations, water sensitive formations, and so on. Complex conditions will occur in the drilling process, including shrinkage, collapse, leakage, water outburst,broken drill pipes, sticky sticks, burnt drills and other accidents emerge in endlessly. On the basis of contrasting with the construction experience of adjacent mining area, the technical difficulties of borehole construction in this area were summarized. the effect of different kinds of mud type were analyzed, including dispersed mud, solid-free polyvinyl alcohol mud, and low-solid polymer mud. The results shown that, 1)High-concentration bentonite slurry has multiple functions such as anti-collapse, anti-leakage, and cementing loose rocks. It is simple to prepare and easy to use, and can be used for drilling in the upper overburden .2)The dispersed mud cannot meet the demand of the complex strata because of poor inhibition; The solid-free polyvinyl alcohol mud has high anti-caving capacities in the early drilling stage, but insufficient ability to deal with collapse accident;.3)Field applications of the low-solid polymer mud show that it performs high inhibitive, good rheology and strong prevention of collapse. Key Words:Yaogou gold deposit, complex strata, coring, anti-slough drilling fluid
keywords:Yaogou gold deposit, complex strata, coring, anti-slough drilling fluid
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