基于DBSCAN算法的孔深测量与地层反演理论研究          下载免费PDF全文

李璇  赵大军 《探矿工程》2021,48(S1):47-51

论文针对地质勘探取心工况复杂、钻进深度大、事故发生率高、岩性复杂、钻进参数难以获取、无法实时掌握钻进状态的难题,在充分调研现有工况识别技术的采集原理、功能种类、现场实测的基础上,结合钻探智能化、自动化的发展方向,运用硬件与软件结合的思想,设计了实时测量钻探参数的方案。论文首次提出使用DBSCAN（针对噪声空间基于分布密度进行聚类的算法）密度聚类法分析钻进参数,结合光电编码器增量的正负性进行工况判别,以获取钻头位置以及钻孔深度。该方案可以判别钻进状态,获取钻进工艺参数,将测量数据作为所钻地层的可钻参数来反演地层。钻机的自动化、智能化研究能获取大量地层资料,有利于推进钻进工艺学发展,实现从经验钻探到智能钻探进的突破。同时,为智能钻进系统奠定基础。  相似文献   

An inexpensive and portable drill rig for bedrock groundwater studies in headwater catchments     

C. P. Gabrielli  J. J. McDonnell 《水文研究》2012,26(4):622-632

Bedrock groundwater dynamics in headwater catchments are poorly understood and poorly characterized. Here, we present an inexpensive and portable bedrock drilling system designed for use in remote locations. Our system is capable of drilling bedrock wells up to 11 m deep and 38 mm in diameter in a wide range of bedrock types. The drill consists of a lawn mower engine adapted to rotate a diamond tipped coring bit, a small water pump to cool and flush the drill bit and a scaffolding platform for stable footing on steep slopes. The complete drilling assembly costs under $ 2000 USD. Here, we show proof‐of‐concept of our approach with 40 successful wells drilled in different geological substrates, including a conglomerate at the Maimai experimental catchment in New Zealand, volcanic breccias at the HJ Andrews experimental watershed in Oregon, USA, sandstone and siltstone at the Alsea watershed in Oregon, USA, and basalt at the Los Gavilanes experimental watershed in Veracruz, Mexico. We also present a transparent comparison between our design and other portable bedrock drilling systems and outline the strengths and weaknesses of each system. Copyright © 2011 John Wiley & Sons, Ltd.  相似文献   

冲击反循环工程钻机自动同步机构的原理          下载免费PDF全文

喻重山  孙孝庆 《探矿工程》1994,(4):1-3

采用行星齿轮差速机构作为ＧＣＦ－１５００型冲击反循环工程钻机的自动同步机构，已经获得成功。分析了该机构的运动学原理和力平衡原理。该机构具有结构简单、工作可不的特点。  相似文献   

气举反循环钻深度的理论计算与加深试验   总被引：2，自引：0，他引：2  

耿令强 《中国煤田地质》2001,13(2):86-87

运用气举反循环钻进、在满足一定条件下适当增加双壁钻具长度即可得到较大钻进孔深，本文通过理论计算及实验，证实了使用现有设备，气举气循环可以更好的满足超午米深水井的施工要求。  相似文献   

煤矿采空区钻孔注浆治理工艺   总被引：6，自引：0，他引：6  

任红旗 《中国煤田地质》2001,13(2):102-103

钻孔注浆充填固结处理煤矿采空区塌陷是一种经济快捷的有效方法，本文就其施工工艺方法进行了简单分析，期望能为其它类似工程提供参考。  相似文献   

滚刀钻头在桩基施工中的应用     

朱玉新  王保健等 《中国煤田地质》2001,13(2):78-79

焊齿破岩滚刀钻头适应多种地层钻进。本文主要介绍了焊齿破岩滚刀钻头的钻进工作原理，在桩基施工中的钻进技术参数，滚刀刀齿的修复及应用效果。  相似文献   

Quaternary vertical offset and average slip rate of the Nojima Fault on Awaji Island, Japan   总被引：5，自引：0，他引：5  

Akihiro Murata  Keiji Takemura  Takao Miyata  Aiming Lin 《Island Arc》2001,10(3-4):360-367

Abstract Drilling was carried out to penetrate the Nojima Fault where the surface rupture occurred associated with the 1995 Hyogo-ken Nanbu earthquake. Two 500 m boreholes were successfully drilled through the fault zone at a depth of 389.4 m. The drilling data show that the relative uplift of the south-east side of the Nojima Fault (south-west segment) was approximately 230 m. The Nojima branch fault, which branches from the Nojima Fault, is inferred to extend to the Asano Fault. From the structural contour map of basal unconformity of the Kobe Group, the vertical component of displacement of the Nojima branch–Asano Fault is estimated to be 260–310 m. Because the vertical component of displacement on the Nojima Fault of the north-east segment is a total of those of the Nojima Fault of the south-west segment and of the Nojima branch–Asano Fault, it is estimated to total to 490–540 m. From this, the average vertical component of the slip rate on the Nojima Fault is estimated to be 0.4–0.45 m/10³ years for the past 1.2 million years.  相似文献   

Crack closure pressures inferred from ultrasonic drill-core measurements to 8 km depth in the KTB wells     

Arno Zang    Hans Berckhemer  Matthias Lienert 《Geophysical Journal International》1996,124(3):657-674

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偏重钻铤在丁集矿冻结造孔施工中的应用     

翟正峰 《中国煤田地质》2007,19(1):76-77

钻井技术的关键是预防及控制孔斜,通过对目前常用4种防斜钻具组合的适岩性、井深、井斜及钻效等指标对比,在冻结造孔施工中选用了适用地层广、防斜性能好并具有纠斜作用的偏重钻铤。为发挥偏重钻铤的防斜作用,宜增大转速,并使钻铤减去部分的重量应位于离轴线尽可能远的部位。在淮南丁集冻结孔施工的三十多口钻孔中,井斜一般均在0．5°以内,钻效超过2400m/台·月。  相似文献   

依兰矿区钻探施工泥浆选型的研究     

魏臣 《中国煤田地质》2007,19(2):72-74

依兰矿区第三系上部的砂泥岩段,因泥岩的水敏水化作用及粗砂岩易坍塌等原因造成,区内钻孔孔壁极不稳定,经常发生粘卡钻具事故。为抑制泥岩的水敏水化,阻止泥岩水化和井壁岩石剥落,增强其防塌能力,在选择腐植酸钾做主剂的基础上选择CMC作降失水增粘剂,选择分子量为300万～500万、水解度30%的聚丙烯酰胺(PAM)作絮凝剂,以加速岩屑沉降,控制固相侵入,降低失水。在钻遇半胶结泥岩时,为防止缩径、坍塌,采用在泥浆中加入重晶石粉,把泥浆比重调整到1.15～1.20g/cm~3,利用泥浆液柱压力控制泥岩缩径和孔壁坍塌。通过实验及现场应用,为该区选择的KHM-CMC-PAM高聚物泥浆配方,能有效地防止水敏性易塌地层的粘卡钻事故,具有护壁防塌、提高钻效等技术效果。  相似文献