川藏铁路复杂地层水平孔钻探护壁堵漏研究与应用          下载免费PDF全文

赵文辉 《探矿工程》2020,47(11):19-24

川藏铁路地处青藏高原东南部,由于构造活动发育,岩体松散破碎,裂隙及承压水发育,勘察这些地层过程中时常发生塌孔、掉块卡钻、冲洗液漏失等复杂情况。本文针对隧道出口段地层设计的定向水平孔,在钻进过程中出现孔壁失稳和冲洗液漏失等问题,通过分析孔内地层特征、漏失情况,提出了适宜的冲洗液体系。随后,进行正交实验快速得到护壁堵漏材料掺量的最优组合,并通过后续的工程实践结果验证并改进,使得冲洗液工艺效果明显。优化配方后的冲洗液,能够大幅度减少孔内事故,有效地促进勘探进度,取得了显著的经济效益和社会效益。  相似文献   

页岩气地质调查井浙桐地1井钻探施工技术          下载免费PDF全文

朱迪斯  岳伟民  单文军  赵洪波  翁炜 《探矿工程》2020,47(9):15-20

浙桐地1井是部署在浙江省桐庐县百江镇境内的一口页岩气地质调查井。该井旨在通过钻取地层岩心及测录井等工作方法探索下扬子地区页岩气新层系奥陶系胡乐组、宁国组泥页岩含气性。文章详细介绍了该井基本情况、钻探施工工艺以及孔斜超标处理方法。在孔深140 m时孔斜严重超标达9.3°,水泥封孔重钻。项目组通过钻压、转速、泵量等钻进参数优化组合并采用底喷同心圆尖齿组合型钻头,克服了地层强造斜性引起的易井斜问题,完钻后测得最大井斜5.5°,符合设计要求。  相似文献   

基于超前钻探测试的隧道地层智能识别方法     

房昱纬  吴振君  盛谦  汤华  梁栋才 《岩土力学》2020,41(7):2494-2503

可靠地识别掌子面前方地层是保证隧道工程稳定与安全的重要因素之一。传统的超前地质预报方法不能同时保证有高识别精度、低实施成本和占用少的施工时间,对于不同地质情况的地层识别通用性不强。在传统超前钻孔的同时获取掌子面前方围岩钻探测试数据,实时获取不同深度岩层情况,将大大提高超前预报效率,方便快捷,不影响施工,但目前缺乏客观、准确的地层识别方法。提出了一种基于神经网络的钻探测试数据智能分析和地层识别方法,对楚大高速公路九顶山隧道超前钻探测试数据进行了深入分析,通过隧道开挖后所揭示地层对分析方法进行了验证。结果表明：单一钻进参数用于地层识别的错误率在35%左右,打击能和打击数、送水压力和送水流量的参数组合不能显著提升地层识别准确率;钻进速度、扭矩、回转数、推进力的参数组合可降低地层识别错误率至22%。在神经网络模型中引入钻进参数的标准差,可大幅降低错误率,可使地层划分错误率下降9%～12%;多参数组合下的神经网络钻探测试神经网络模型对随机抽样的地层识别错误率小于10%,对单个钻孔的地层识别错误率小于14%。  相似文献   

自升式平台桩脚在含硬壳层地基中的插深分析   总被引：1，自引：0，他引：1  

李洪  邓金根  孙焱  李炎军 《海岸工程》2010,29(2):31-37

存在硬壳层的层状地基承载能力分析是自升式钻井平台桩脚插深分析的关键,但是目前对硬壳层承载能力的确定还没有成熟可行的理论计算方法。一般的针对非均质层状地基的承载力计算方法,因参数较多,计算步骤繁琐,很难广泛应用于实际的平台桩脚入泥深度分析中。文中主要介绍了存在硬壳层的层状地基承载力的分析方法与过程,根据应力扩散原理推导并做适当的简化得到硬壳层承载力修正方法。简化后的修正方法能满足一般硬壳层承载力分析的需要,并使平台插桩深度分析计算过程变得简便。通过在实际工程的应用,得到的实测结果与理论计算值也较为一致,说明了用此方法分析硬壳层地基的平台插桩是合理、实用的。  相似文献   

Hydraulic套管开窗工具在南海西部油田的首次应用     

赵苏文  段泽辉  顾纯巍  罗鸣  徐一龙 《海洋地质译丛》2010,(3):84-87

南海西部油田的涠洲11-1N-A12井是一口探边注水井,该井采用威德福公司最新型的液压磨铣套管开窗工具在9-5/8＂套管内进行开窗侧钻,仅用一趟钻就实现了定向、座挂、开窗、修窗和钻进新地层14.12 m,大大节约了钻井时间。介绍了威德福公司的Hydraulic套管开窗系统的组成部件及工具的优点,分析了如何在开窗作业过程中进行钻井参数控制,总结了关于工具的送入、脱手、定向和窗口质量控制等方面的一些经验,可以为以后类似井的套管开窗作业提供技术参考。  相似文献   

深水钻井液研究与评价模拟实验装置     

徐加放  邱正松 《海洋地质译丛》2010,(3):88-92

分析了我国深水钻井的现状和未来发展趋势,调研分析了深水钻井所面临的困难和深水钻井液必须具备的基本性能。在理论推导并结合实践的基础上,研制了深水低温钻井液基本性能模拟实验装置、深水钻井液水合物生成与抑制评价实验装置以及深水钻井液循环与井壁稳定模拟实验装置等,并对模拟装置的实验可行性和平行性进行了验证。实验结果表明,新研制模拟实验装置控制精度较高、实验平行性较好,能够满足深水钻井液性能测定与评价的基本要求,为我国深水钻井液技术研究奠定了一定的室内实验研究基础。  相似文献   

Research and development on foam breaking and recycling technology in air-foam drilling     

CAO Pinlu  ZHANG Jincheng  WU Xia  HUANG Jinyun Institute of Drilling Engineering Technology  Zhongyuan Petroleum Exploration Bureau  Puyang  Henan  China 《东北亚地学研究》2009,(4):204-209,214

In recent years, air-foam combining the advantages of both liquid and air drilling has been utilized as a drilling medium. Air-foam drilling has proved its efficiency in numerous situations where serious problems were encountered, such as in fractured formations and depleted or high permeable zones. However, the major disadvantage of air-foam drilling system is that the foam can only be used once, so that an extremely large pit is required to contain the foam to allow sufficient room for cuttings and for the foam to dissipate. Moreover, it needs enormous volume prepared, consuming abundance of water and ingredient additives, which results in the high cost of foam drilling. The recycling foam fluid by using foam breaking technology is the only effective method to solve these problems associated with the known foam drilling. Various types of equipment and technique have been employed to suppress foam formation in biological and process equipment in foam drilling. The study described various methods of foam breaking technology, and the trend of the foam breaking technology for foam drilling is discussed.  相似文献   

Application of a proportional-integral control for the estimation of static formation temperatures in oil wells     

G. Espinosa-Paredes  A. Morales-Díaz  U. Olea-González  J.J. Ambriz-Garcia 《Marine and Petroleum Geology》2009

A strategy based on proportional-integral (PI) feedback control was applied to solve an inverse heat transfer problem for estimating static formation temperatures (SFTs) from logged temperatures in oil wells. The PI control feedbacks the error between logged and simulated temperatures during the shut-in time process, existing SFT proposal. Thus, mathematically speaking an inverse heat transfer problem was solved in this way, since SFT represents the initial conditions (which are unknown) to solve the partial differential equations governing the heat transfer process in the wellbore-formation system. The mathematical model considers transient convective heat transfer due to circulation losses to the rock surrounding a well. The methodology was tested analyzing two oil wells (MB-3007 and MB-3009) from the Gulf of Mexico and results were compared against two classic methods. The method presented in this work needs only one temperature measurement for each fixed depth to estimate the SFT.  相似文献   

Combining 2D-basin and structural modelling to constrain heat transport along the Muroto Transect,Nankai Trough,Japan     

Robert Ondrak  Christoph Gaedicke  Brian Horsfield 《Marine and Petroleum Geology》2009

The Nankai Trough located southeast of Shikoku Island, Japan, exhibits a zone of exceptionally high heat flow. In the central part of the Nankai Trough the fossil spreading centre of the Shikoku Basin is subducted beneath the southwest Japan arc. We have modelled the temperature and maturation history along the Muroto Transect reaching from the tip of the thrust zone out into nearly undeformed Quaternary and Tertiary sediments seawards of Nankai Trough. We used two balanced cross-sections defining the sections before and after overthrusting as input for 2D-basin modelling. We can show that rapid burial and overthrusting during the Quaternary in combination with a heat flow history following the cooling curve of a 15 Ma old oceanic plate is not sufficient to explain the measured maturity of organic material in the sediments. Several heat flow scenarios derived from theoretical concepts [Yamano, M., Kinoshita, M., Goto, S., Matsubayashi, O., 2003. Extremely high heat flow anomaly in the middle part of the Nankai Trough. Physics and Chemistry of the Earth, Parts A/B/C 28, 487–497.] and previous modelling approaches [e.g. Brown, K.M., Saffer, D.M., Bekins, B.A., 2001. Smectite diagenesis, pore water freshening, and fluid flow at the toe of the Nankai wedge. Earth and Planetary Science Letters 194, 97–109; Spinelli, G.A., Underwood, M.B., 2005. Modeling thermal history of subducting crust in Nankai Trough: constraints from in situ sediment temperature and diagenetic reaction progress. Geophysical Research Letters 32(L09301): doi:10.1029/2005GL022793; Steurer, J., Underwood, M.B., 2003. Clay mineralogy of mudstones from the Nankai Trough reference sites 1173 and 1177 and frontal accretionary prism site 1174. In: H. Mikada et al. (Eds.), pp. 1–37. Available from: <http://www-odp.tamu.edu/publications/190196SR/VOLUME/CHAPTERS/211.PDF>] were tested. The best match between observed maturity levels, temperature and heat flow measurements is reached for a heat flow history which initially assumes the cooling of a 15 Ma old oceanic lithosphere but is reheated to 170–180 mW/m² during the phase of rapid burial in the Quaternary. This can be achieved either by assuming the onset of hydrothermal circulation in the cooling crust or by reheating caused by off-axis volcanism at about 6 Ma [Yamano, M., Kinoshita, M., Goto, S., Matsubayashi, O., 2003. Extremely high heat flow anomaly in the middle part of the Nankai Trough. Physics and Chemistry of the Earth, Parts A/B/C 28, 487–497.].  相似文献   

高平4水平井组双保钻井液技术     

胡祖彪  骆胜伟  孟凡金  陈秉炜  石仲元  金虎 《海洋地质译丛》2009,(1):110-115

高平4井组水平井主要用于开发安塞长10组油藏。针对该井组上部直罗组和富县组易坍塌、下部地层钻速相对较慢、地层易造浆的特点,研究应用了环保型聚硅酸盐-黄胞胶钻井液体系。该体系具有抑制性强、润滑和剪切稀释性好的特点,有利于安全快速钻井,对环境污染极小。通过小型配浆实验确定钻井液施工方案,中测后稀释钻井液,降低钻井液滤失量和密度,加强固相控制,使用保护油层的酸溶性暂堵剂和降滤失剂,可最大限度地保护油层。  相似文献