共查询到20条相似文献，搜索用时 414 毫秒
1.
Staring from the view point of practical application, based on large amount of pressure well- logging data home and abroad, the author demonstrated how to distinguish overpressure Formation using wellsite data througl selected methods such as drilling parameters, rock cutting analysis, drilling fluid parameters, and electric welline logs. 相似文献
2.
钻孔资料是地质工作中形成的重要数据资源,囊括了地层、岩性、构造、矿化蚀变特征、元素化学分析和地下水动态等地质信息,是开展地质找矿,矿产资源评价、地质科学研究、环境保护、城市建设等工作所需要的重要地质资料。为了高效利用原始钻孔资料,本文结合近年来城市地质调查信息化和地下三维可视化建设的工作实践,研究了可操作性强、规范实用的钻孔入库数据表结构,实现了多元、多源、异构钻孔数据的规范化处理,提升了钻孔资料的利用效率和信息化服务水平,更好地发挥了基础地质资料的有力支撑作用,也为其他省市的钻孔资料信息化工作提供了参考。 相似文献
3.
WANG Yachun 《东北亚地学研究》2002,(2)
Ｔｈｅｆｏｒｍａｔｉｏｎｐｒｅｓｓｕｒｅｅｖａｌｕａｔｉｏｎｉｓｐｌａｙｉｎｇｖｅｒｙｉｍｐｏｒｔａｎｔｒｏｌｅｉｎｏｉｌａｎｄｇａｓｅｘｐｌｏｒａｔｉｏｎａｎｄｄｅｖｅｌｏｐ ｍｅｎｔ .Ｉｔｃａｎｐｒｏｖｉｄｅｖｅｒｙｉｍｐｏｒｔａｎｔｉｎｆｏｒｍａｔｉ 相似文献
4.
The paper deals with the methods of formation pressure evaluation for a single well by using the very common accepted parameters, such as drilling exponent , and flowline temperature , etc. which is part of compiling the end well report. 相似文献
5.
WANG Yachun 《东北亚地学研究》2002,(1)
The paper deals with the methods of formation pressure evaluation for a single well by using the very common ac-cepted parameters, such as drilling exponent , and flowline temperature , etc. which is part of compiling the end well report. 相似文献
6.
7.
通过自主研发设计的非开挖随钻检测系统,采集非开挖钻进参数,进行非开挖钻进实时地层岩性识别,为非开挖施工提供安全信息保证。针对非开挖工程工勘资料缺乏,掘进地层岩性难以判断的问题,提出了一种基于非开挖随钻检测系统实时采集数据,利用随机森林算法建立地层识别模型,通过模型去识别未知地层,并将识别结果可视化展示。通过非开挖随钻检测系统在工程现场的实际应用,获得了包括钻速、扭矩、转速、拉力、泵压、泵量等钻进敏感参数作为训练样本,利用随机森林算法对采集的钻进参数进行训练,构造决策树与随机森林,对钻进参数进行分类,建立了以典型非开挖地层岩性分类为目标的分类模型,分别确定了杂填土、黏土、粉细砂、砾石和淤泥的地层分类标签。进一步,基于机器学习的分类结果,利用PCA主成分分析将地层识别特征降维至三维,实现了地层岩性识别结果的三维展示。将预测模型应用于实际工程,以验证其有效性。结果表明,该方法能在非开挖实时钻进条件下快速识别钻进地层,识别正确率高达92%。该研究成果通过采集导向随钻参数,识别非开挖掘进段地层岩性,为非开挖扩孔阶段钻具选型、泥浆设计等提供了重要信息。 相似文献
8.
针对非开挖工程工勘资料缺乏,掘进地层岩性难以判别的问题,提出一种基于非开挖泥浆性能检测与弱监督机器学习结合的典型非开挖地层岩性识别方法。结合自主设计研发的非开挖泥浆性能检测系统工程现场应用,获取非开挖掘进导向段泥浆流变性能参数和密度等敏感参数的训练样本。利用部分有标签数据与K近邻（K Nearest Neighbors,KNN）算法对所有泥浆参数训练样本进行特征标签,采用核函数映射到高维空间支持向量机（Support Vector Machines,SVM）进行分类处理,建立了以上海地区典型非开挖地层分类为目标的分类模型。将该地层识别模型应用于上海地区非开挖工程,验证其有效性。结果表明,该方法能在非开挖实时钻进条件下快速识别钻进地层,识别正确率高达96%。研究成果通过采集导向段泥浆性能参数,识别非开挖掘进段地层岩性,为非开挖扩孔阶段钻具选型、泥浆设计等提供了重要地质信息保障。 相似文献
9.
10.
波阻抗约束反演技术探测煤厚方法初探 总被引：1，自引：0，他引：1
现代化矿井生产技术日新月异,尤其对煤层厚度的探明程度要求越来越高。综合利用地质钻探和测井等资料,与地震资料有机结合而产生的具有高分辨率的新方法,发挥了钻探、测井和地震勘探技术各自的优势,实现了不同技术之间取长补短并提取地震属性参数,通过波阻抗约束反演可获得煤层厚度参数,达到对煤层厚度进行预测的目的。 相似文献
11.
Air DTH hammer has been successfully applied in minor-caliber solid mineral exploration,water-well drilling and other drilling areas.In order to expand the applications of the technology,the authors further studied the principle and analyzed the mechanism of reverse circulation drilling technique with air DTH hammer to get the perfect assembles of equipments by optimizing working parameters.No parameter seemed more important than the air volume because it could maintain the working performance stability.The minimum air volume is related to the parameters such as depth and pressure,which was calculated under the actual conditions.It was solved for the air injection flow tables of the air DTH Hammer working at the different pressures.According to the data tables,operators could adjust the air volume to meet the demand on this technique,which had a realistic guiding significance.So it could build up a set of systematic and complete hi-technique. 相似文献
12.
Air down-the-hole(DTH)hammer drilling has long been recognized to have the potential of drilling faster than conventional rotary drill,especially in some hard rocks such as granite,sandstone,limestone,dolomite,etc.with the same weight on bit(WOB)and rotations per minute(RPM).So,it has been widely used in many drilling fields including mineral resource exploration drilling,oil and gas drilling and geothermal drilling.In order to reduce drilling cost by selecting optimal drilling parameters,rate of penetration(ROP)should be estimated accurately and the effects of different factors on ROP should be analyzed.In this research,ANN model with several multi-layer perception back propagation(BP)networks for predicting ROP of air DTH hammer drilling was developed using controllable parameters such as impact energy,impact frequency,WOB,RPM and bit operating time for the formations with a certain drillability index of rock.Several BP neural networks with the different neurons in hidden layers were developed and compared for selecting optimal architecture of ANN.The effects of the drilling parameters such as impact energy,impacting frequency,WOB,RPM and bit operating time on the ROP of air DTH hammer drilling were investigated by trained ANN.From the analyses,the optimum range of drilling parameters for providing high ROP were determined and analyzed for a formation with a certain drillability index of rock.The methodology proposed in this study can be used in many mathematical problems for optimization of drilling process with air DTH hammer. 相似文献
13.
《世界地质(英文版)》2016,(1):1-5
Drilling operations in polar regions and mountainous areas are complicated by nature of the extreme environment. Yet conventional rotary drilling technologies can be used to drill ice for scientific samples and other research. Due to such reasons as power consumption and weight complications,it is hard to apply a conventional rotary drilling rig for glacial exploration. Use of small,relatively lightweight,portable engine-powered drilling systems in which the drill lifting from the borehole is carried by the winch. It is reasonable enough for near-surface shallow ice-drilling down to 50 m. Such systems can be used for near-surface ablation-stakes installation,also temperature measurements at the bottom of active strata layer,revealing of anthropogenic pollution,etc. The specified used in this research is an auger ice drill powered by a gasoline engine. At this stage,it is crucial to choose effective drilling parameters such as weight on bit( WOB) and drill bit rotation rate. Sensors equipped on the rig have measured the main parameters of the drilling process,such as drill speed,WOB,drill rotation speed,torque and temperature. This paper addresses research on drilling parameters of engine powered auger ice drill and supplies some recommendations for optimization of any ice-core drilling process. 相似文献
14.
A high efficiency method is very important in geological survey for a new city in China. Geophysical parameters are Measured While Drilling(MWD), and these parameters are processed and explained on the ground, so the method can replace conventional engineering geological exploration for drilling rock sample. According petroleum engineering MWD, using the different characters of different rock absorbs γ radial, with the method of storing data in hole and explaining data on the ground, engineering geological exploration formation density MWD is researched. The MWD works stabilized, and the performance is good with precise data. 相似文献
15.
贯通式气动潜孔锤反循环钻进是以压缩空气作为碎岩动力和洗井介质，配用双壁钻杆，实现全孔反循环连续取芯（样）的钻进技术。本文在对反循环钻进机理分析的基础上，提出了反循环钻头的设计依据和原则，并依据野外生产试验资料，确定了贯通式气动潜孔锤反循环钻进的设备配套方案、钻进规程参数和工艺技术措施。 相似文献
16.
17.
Foam is used widely in underbalanced drilling for oil and gas exploration to improve well perfor-mance.Accurate prediction of the cutting transport and pressure loss in the foam drilling is an important way to prevent stuck pipe,lost circulation and to increase the rate of penetration(ROP).In foam drilling,the cuttings transport quality may be defined in terms of cuttings consistency and downhole pressure loss,which are controlled by many factors.Therefore,it is very difficult to establish the mathematical equation that reflects nonlinear relationship among various factors.The field and experimental measurements of these parameters are time consuming and costly.In this study,the authors suggest a cuttings transport mathematical modeling using BPN(back propagation network),RBFN(radial basis function network)and GRNN(general regression neural network)based on various experiment data of cuttings transport of previous researchers and compared the result with experiment data.Results of this study show that the GRNN has a correlation coefficient of 0.99962 and an average error of 0.15 in training datasets,and a correlation coefficient of 0.99881 and an average error of 0.612 in testing datasets,which has higher accuracy and faster training velocity than the BP network or RBFN network.GRNN can be used in many mathematical problems for accurate estimation of cuttings consistency and downhole pressure loss instead of field and experimental measurements for hydraulic design in foam drilling operation. 相似文献
18.
激光钻进岩石形成的钻孔的孔形较为复杂,具有较小的孔直径和较高的孔壁粗糙度,使得利用传统方法进行钻孔尺寸的测量较为困难。为了精确钻孔测量和方便孔形研究,提出了一种基于线激光扫描及逆向建模的钻孔建模方法。首先,搭建了线激光扫描平台,建立了空间坐标系,以获取钻孔的三维坐标,构建了钻孔的初始点云数据。其次,在MATLAB中对获取的点云数据进行无效点移除及多视角点云配准,其中,无效点移除利用顺序查找法实现,多视角点云配准则基于迭代最近点（ICP）算法,包括初始配准和精确配准两个阶段。最后,基于Delaunay三角网格划分及曲面重建算法,实现了钻孔模型的重建和可视化。此外,还采用滴液法和切割法进行实际钻孔容积值测量及钻孔轮廓线获取,并与由点云重建的钻孔模型上获取的测算结果进行对比分析,以验证所述方法建立的钻孔模型的精度。结果表明:重建的钻孔模型与实际钻孔之间的误差小于4%,重建的模型能够满足激光岩石钻进钻孔的测量要求,证实了所述方法的可行性。与传统测量方法相比,所述方法属于非接触、非破坏性方法,可重复性测量。 相似文献
19.
20.
岩石可钻性的合理分级,是正确选择钻进方法、技术参数、钻头类型和制定合理的生产与物化定额、专核钻探生产技术与经济指标的科学依据。利用与岩石可钻性密切相关的物理力学性质—压入、摆球硬度、研磨性、塑性系统与声学特性为自变量,以微钻钻速为因变量,在计算机上进行一元和多元回归分析,建立其数学模型,以此将不同岩石划分为12级。这种方法具有较强的模拟性、代表性和较大的适用范围。 相似文献