BASED ON MICRO-SEISMIC MONITORING TECHNOLOGY IN MINE SAFETY MANAGEMENT RESEARCH
- 格式:ppt
- 大小:1.26 MB
- 文档页数:12
三维空间中水力裂缝穿透天然裂缝的判别准则程万;金衍;陈勉;徐彤;张亚坤;刁策【摘要】基于对三维空间下水力裂缝尖端应力场以及作用在天然裂缝面上的应力场的分析,建立了水力裂缝穿透天然裂缝的判别准则。
利用大尺寸真三轴水力压裂实验模拟系统,实验研究了不同产状天然裂缝、地应力对水力裂缝扩展行为的影响。
实验研究表明:水力裂缝穿透预制裂缝的现象主要发生在高逼近角、高走向角、高水平应力差异系数、高水平应力差的区域;水平应力差存在一个临界值,大于该值,水力裂缝才可能穿透预制裂缝。
实验结果与本准则预测结果吻合良好。
应用本准则,预测四川盆地龙马溪组页岩气试验井水力裂缝不能穿透天然裂缝面,与微地震压裂监测解释结果一致。
图8表1参15%Based on the analysis of the stress fields near the hydraulic fracture tip and on the natural fracture surface, a criterion for identifying hydraulic fractures crossing natural fractures was proposed. A series of hydraulic fracturing tests were conducted to investigate the influences of natural fractures occurrence and horizontal stress contrast on hydraulic fracture propagation using large scale tri-axial fracturing system. The experiment results showed that the crossing happens in the region with high approaching angle and strike angle, large horizontal stresses and horizontal stress difference coefficient. Horizontal stress contrast has a critical value, only when it is above the critical value, may the hydraulic fracture cross the natural fracture. These experimental results agree with the predictions of this criterion well. It is predicted bythis criterion that the hydraulic fracture of a test well in the Longmaxi shaleformation, Sichuan Basin, can’t cross the natural fracture, which agrees with the micro-seismic monitoring results.【期刊名称】《石油勘探与开发》【年(卷),期】2014(000)003【总页数】5页(P336-340)【关键词】页岩;水力压裂;天然裂缝;水力裂缝;产状【作者】程万;金衍;陈勉;徐彤;张亚坤;刁策【作者单位】中国石油大学北京石油工程学院; 油气资源与探测国家重点实验室;中国石油大学北京石油工程学院; 油气资源与探测国家重点实验室;中国石油大学北京石油工程学院; 油气资源与探测国家重点实验室;中国石油大学北京石油工程学院; 油气资源与探测国家重点实验室;中国石油大学北京石油工程学院; 油气资源与探测国家重点实验室;中国石油大学北京石油工程学院; 油气资源与探测国家重点实验室【正文语种】中文【中图分类】TE357.1开发非常规油气藏常需要采用大规模的水力压裂改造储集层[1-4]。
水力压裂储层孔隙度计算方法作者:周晓华孟文博甘棣元来源:《中国测试》2017年第09期摘要:孔隙度是对水力压裂施工进行评价的一个重要参数,为准确地计算压裂后储层孔隙度,结合储层压裂前初始孔隙度的测井结果和微地震监测技术的监测结果提出一种水力压裂储层孔隙度计算的新方法。
首先对储层孔隙度的计算方法进行分析,然后结合微地震监测技术的监测结果进行新计算方法的推导,最后以一次压裂实验后目标储层孔隙度计算过程为例,证明该计算方法的有效性。
结果表明:相较于测井法,利用压裂前测井参数和压裂后微地震监测结果结合的方法能够有效避免压裂对孔隙度测量、计算的影响,计算结果能更合理地反映压裂后储层的孔隙度。
关键词:孔隙度;水力压裂;测井信息;微地震监测文献标志码:A 文章编号:1674-5124(2017)09-0013-05Abstract: Porosity is an important parameter for the evaluation of hydraulic fracturing. In order to accurately calculate the porosity of fractured reservoir, a new method of calculating porosity of hydraulic fracturing reservoir is proposed by combining the logging results of the initial porosity before fracturing and the monitoring results of micro-seismic monitoring technology. The calculation method of reservoir porosity is analyzed, and then combined with the monitoring results of micro-seismic monitoring technology, the new calculation method is deduced. Finally, the effectiveness of the calculation method is proved by the calculation process of the reservoir porosity after primary fracturing experiment. The results show that compared with the logging method, the method of combining the logging parameters before fracturing and the micro-seismic monitoring results after fracturing can effectively avoid the influence of fracturing on the measurement and calculation of porosity, and the calculation results can reflect the porosity of the fractured reservoir more reasonably.Keywords: porosity; hydraulic fracturing; logging information; micro-seismic monitoring0 引言水力压裂是一项具有巨大经济效益的油气田增产技术,目前已经越来越多地应用到了油气田的增产活动中。
甜水堡煤矿煤巷支护参数与设备工艺优化研究孟键1, 朱长华2, 牛志军3,4, 王旭锋3,4, 吕昊5(1. 华电煤业集团有限公司,北京 100001;2. 甘肃万胜矿业有限公司,甘肃 庆阳 745713;3. 中国矿业大学 矿业工程学院,江苏 徐州 221116;4. 中国矿业大学 江苏省矿山地震监测工程实验室,江苏 徐州 221116;5. 国家能源集团宁夏煤业有限责任公司 羊场湾煤矿,宁夏 银川 750411)摘要:目前巷道快速掘进技术研究主要针对巷道快速掘进的影响因素、设备优化等,对巷道空顶距、支护参数、施工工艺联合优化的研究较少。
针对该问题,以甘肃省环县甜水堡煤矿2号井1309工作面回风巷为研究对象,对煤巷支护参数与设备工艺优化方法进行研究。
分析了巷道掘进各工序的用时特征,得出掘进、永久支护、临时支护用时最多,占比分别为25.3%,49.9%,6.2%;以耗时最长的3个工序为重点优化方向,构建了掘进工作面空顶区顶板力学模型,得出掘进工作面理论最大空顶距为2.32 m ,考虑现场受设备、地质、工艺等因素影响,确定空顶距为2.0 m ;根据不同支护方案下巷道围岩应力、变形、塑性区的分布特征,结合巷道高效掘进需求,确定最佳锚杆间排距为800 mm×1 000 mm 。
结合巷道实际的地质条件,配套优化了掘进设备、临时支护工艺与施工工艺。
现场试验结果表明,优化后最大日进尺由8 m 提高到10 m ,巷道掘进速度提高了25%;巷道围岩变形基本处于稳定状态,最大变形量为226 mm 。
优化方案不仅保证了巷道的安全稳定,还显著提高了巷道的掘进速度。
关键词:快速掘进;极限空顶距;围岩控制;支护参数优化;支护工艺优化;施工工艺优化中图分类号:TD353 文献标志码:AResearch on optimization of coal roadway support parameters and equipment technologyin Tianshuibao Coal MineMENG Jian 1, ZHU Changhua 2, NIU Zhijun 3,4, WANG Xufeng 3,4, LYU Hao 5(1. Huadian Coal Industry Group Co., Ltd., Beijing 100001, China ; 2. Gansu Wansheng Mining Co., Ltd., Qingyang 745713, China ; 3. School of Mines, China University of Mining and Technology, Xuzhou 221116, China ; 4. Jiangsu Mine Seismic Monitoring Engineering Laboratory, China University of Mining and Technology, Xuzhou 221116,China ; 5. Yangchangwan Coal Mine, CHN Energy Ningxia Coal Industry Co., Ltd., Yinchuan 750411, China)Abstract : Currently, research on rapid excavation technology mainly focuses on the influencing factors and equipment optimization of rapid excavation. There is relatively little research on the joint optimization of roadway empty roof distance, support parameters, and construction technology. In order to solve the above problem, the study focuses on the return air roadway of the 1309 working face in the No.2 of Tianshuibao Coal Mine in Huanxian County, Gansu Province. The study investigates the optimization methods of coal roadway support parameters and equipment technology. The study analyzes the time features of each process of roadway excavation. It is found that excavation, permanent support, and temporary support take the most time, accounting for 25.3%, 49.9%, and 6.2% respectively. Focusing on the three most time-consuming processes as the收稿日期:2024-01-08;修回日期:2024-03-20;责任编辑:胡娴。
低频通信系统天线近场辐射危害研究王彦碧【摘要】目的为低频通信系统电磁辐射危害控制方法提供数据支撑.方法基于IEEE-Std-C95.1—2005、GJB 5313A—2017以及GB 8702—2014,通过试验详细地获取不同功率和频率条件下低频通信系统天线近场综合场强值,并将工作区域划分为危险区、短时活动区和安全工作区.结果以甚低频菱形天线为中心,40 m半径范围内为危险区,其峰值场强高于70 V/m,40~70 m半径范围内为短时活动区,70 m半径外为安全工作区.结论甚低频天线近场电磁辐射危害试验验证和区域划分,为低频通信系统电磁辐射危害有效控制提供技术支撑.【期刊名称】《装备环境工程》【年(卷),期】2019(016)001【总页数】4页(P114-117)【关键词】低频通信系统;天线近场;辐射危害;区域划分【作者】王彦碧【作者单位】中国船舶重工集团公司第七二二研究所,武汉 430205【正文语种】中文【中图分类】X123频率处于十几赫兹、波长大于数十公里的低频通信一直备受欧美等各军事强国的重视。
虽然通信效率低,且产生低频电磁波需要极大的功率基站和发射天线,低频通信系统仍然是对水下单向通信的重要手段。
美国卡特勒(Cutler, MA.)甚低频天线系统的发射功率为1.8 MW,所用的伞状天线阵列可在24 kHz下高效辐射,其中心垂直天线桅杆辐射甚低频电磁波,水平悬挂电缆阵列作为电容器来增加垂直辐射器的效率。
美国吉姆溪(Jim Creek, WA.)甚低频长波通信站主要负责太平洋海域的水下单向通信,其天线阵列由10个链状电缆线组成,垂直电缆线为主要辐射单元。
欧美等国较多关注的是大功率发射系统的效率和作用距离,而对上述低频通信系统的大功率发射天线暴露在空旷地带所产生的近场电磁辐射对附近人员和设备造成严重电磁辐射危害则较少研究[1]。
在电磁辐射危害方面,IEEE-Std-C95.1—2005[2]和IEEE-Std-C95.6—2002[3]标准分别对 0~3 kHz和3 kHz~300 GHz频段内,生物体所能承受的电磁辐射进行了详细论述。
石油地质与工程2021年3月PETROLEUM GEOLOGY AND ENGINEERING 第35卷第2期文章编号:1673–8217(2021)02–0103–05微地震监测技术在吐哈油田西山窑油藏蓄能压裂中的应用冯超1,隋阳2,衡峰1,魏国栋1,姜清岩1,孟杰1(1.中国石油集团东方地球物理勘探有限责任公司,河北涿州072750;2.中国石油集团吐哈油田公司,新疆鄯善838200)摘要:西山窑油藏低孔特低渗储层开发过程中产能低、稳产差,采用大液量施工、补充地层能量、提高地层压力的蓄能压裂工艺方法,以达到扩大储层改造体积、增加流体渗流通道的目的;同时加入暂堵剂对天然裂缝及人工裂缝进行暂堵,迫使裂缝转向,避免单一主裂缝沿高渗通道延伸。
蓄能压裂工艺方法是致密油储层改造的新探索,需要准确的压裂效果评价技术,微地震监测技术被广泛用于致密油气储层改造效果评价,具有实时性、准确性的特点,可以评价蓄能压裂工艺改造效果。
对致密油储层三口井压裂微地震监测实例进行分析研究表明,微地震监测可以有效识别压裂中天然裂缝影响、评价蓄能压裂工艺储层改造以及暂堵转向工艺效果。
关键词:西山窑油藏;注水蓄能;微地震监测;暂堵压裂;b值分析中图分类号:TE357.1 文献标识码:AApplication of micro-seismic monitoring technology in energy storage fracturing inXishanyao reservoir of Tuha oilfieldFENG Chao1, SUI Yang2, HENG Feng1, WEI Guodong1, JIANG Qingyan1, MENG Jie1(1.Bureau of Geophysical Prospecting INC., China National Petroleum Corporation,Zhuozhou,Hebei,072750, China;2. Tuha Oilfield Company, China National Petroleum Corporation, Shanshan,Xinjiang,838200, China) Abstract: During the development of low porosity and ultra-low permeability reservoirs in Xishanyao reservoir, the productivity is low and the stable production is poor. In order to expand the reservoir reconstruction volume and increase the fluid seepage channel, the energy storage fracturing technology is used to increase the formation energy and increase the formation pressure. At the same time, the temporary plugging agent is added to block the natural and artificial fractures to force the fracture to turn and avoid the single main fracture extending along the high permeability channel. Energy storage fracturing technology is a new exploration of tight oil reservoir reconstruction, which needs accurate fracturing effect evaluation technology. Micro-seismic monitoring technology is widely used in tight oil and gas reservoir reconstruction effect evaluation, which has the characteristics of real-time accuracy, and can evaluate the effect of energy storage fracturing technology.The micro-seismic monitoring examples of three wells in tight oil reservoir show that the micro-seismic monitoring can effectively identify the influence of natural fractures in fracturing, evaluate the reservoir reconstruction of energy storage fracturing technology and improve the effect of temporary plugging and diversion.Key words: Xishanyao reservoir; water injection for energy storage; micro-seismic monitoring; temporary plugging fracturing; b value analysis收稿日期:2020–09–08;修订日期:2020–10–26。
我研究微波遥感的英语作文Microwave remote sensing is a powerful tool used to gather information about the Earth's surface and atmosphere. It involves the use of microwave radiation to measure various properties of the target, such as temperature, moisture content, and surface roughness. This technologyhas revolutionized our understanding of the Earth and has numerous applications in weather forecasting, agriculture, and environmental monitoring.Microwave remote sensing works by emitting microwave radiation towards the target and measuring the reflected or emitted radiation. The interaction between the microwave radiation and the target provides valuable informationabout its properties. For example, the amount of radiation reflected by a surface can indicate its roughness, whilethe intensity of the emitted radiation can reveal the temperature of an object.One of the advantages of microwave remote sensing isits ability to penetrate through clouds, vegetation, and even some building materials. This allows researchers to gather data in areas that are otherwise inaccessible or obscured by other factors. For example, microwave remote sensing can be used to monitor soil moisture levels in agricultural fields, providing valuable information for farmers to optimize irrigation practices.Another application of microwave remote sensing is in monitoring sea ice and polar regions. By measuring the microwave radiation emitted by sea ice, scientists can track its extent and thickness, providing crucial information for climate studies and navigation purposes. This technology has also been used to monitor changes in glaciers and ice sheets, helping us understand the impact of climate change on these vulnerable regions.In addition to its applications on Earth, microwave remote sensing is also used for planetary exploration. Spacecraft equipped with microwave sensors have been sent to other planets, such as Mars, to study their surface composition and geological features. By analyzing themicrowave radiation reflected or emitted by these planets, scientists can gain insights into their physical properties and potential for supporting life.In conclusion, microwave remote sensing is a versatile and valuable technology that allows us to gather information about the Earth's surface and atmosphere. Its ability to penetrate through various obstacles and its wide range of applications make it an essential tool in many fields of research. As technology continues to advance, we can expect even more exciting discoveries and applications of microwave remote sensing in the future.。
采用微震监测技术提高钻孔卸压效果的方法成功; 王锡勇; 李冬伟; 满轲; 李炜强【期刊名称】《《中国矿业》》【年(卷),期】2019(028)011【总页数】5页(P142-146)【关键词】微震监测; 动力灾害; 大直径钻孔卸压; 支承压力; "固定"工作面【作者】成功; 王锡勇; 李冬伟; 满轲; 李炜强【作者单位】核工业北京地质研究院北京100029; 中核集团高放废物地质处置评价技术重点实验室北京100029【正文语种】中文【中图分类】TD324近年来,随着矿山开采深度增加,煤矿动力灾害事故频发,安全形势严峻,动力灾害防治成本越来越高[1-2]。
煤矿常用的动力灾害防治措施包括开采保护层、煤层注水和大直径钻孔卸压等。
其中,大直径钻孔卸压作为防治动力灾害中冲击地压危害最直接也是最有效的手段,在煤矿开采过程中应用广泛。
但盲目施工大直径钻孔不仅造成资源的极大浪费,而且动力灾害防治效果不明显。
为了解决这一难题,许多矿山动力灾害防治措施开始由粗放型向精细化和经济化转变。
大直径钻孔卸压指在巷道内向待采煤层中施工一定数量的大直径的钻孔,使煤体预留变形空间。
具有冲击危险性的煤体内部发生破裂,工作面超前支承压力向深部转移,改变煤体应力状态,从而保护巷道不受破坏[3-4]。
大直径卸压孔随着工作面回采向前移动,始终与工作面保持一定距离。
如何确定大直径钻孔卸压的有效范围,是动力灾害防治措施中一项重要的研究课题。
本文通过微震监测技术获得煤体支承压力的影响范围,结合覆岩空间结构理论,得到了卸压孔的最优布置范围,重新设计了合理的卸压孔布置方案,提高了井下作业安全性和矿山开采经济性。
1 工作面概况方山矿工作面为二1区首采综采工作面,平均走向长750 m,平均采长158 m。
回采巷道沿煤层顶板掘进,地层倾角13°~20°。
二1煤层位于山西组下部,为低透气性软煤层,平均煤厚8.0 m,工作面煤层条件复杂,煤层厚度变化幅度大,顶板有厚层坚硬大占砂岩层,图1为工作面综合地质柱状图。
煤层气水平井微地震成像裂缝监测应用研究张永成;郝海金;李兵;刘亮亮;徐云【摘要】为有效地指导煤层气水平井压裂工程,评价压裂施工效果,提出将微地震成像裂缝监测技术应用于煤层气水平井压裂施工中.利用微地震成像监测煤层气水平井裂缝延伸的方位、缝长及缝高,分析裂缝双翼不对称发育原因.以沁水盆地寺河区块为例,将水平井和同规模、同层位垂直井的裂缝监测结果进行对比分析,结果显示,因布井方位及施工工艺影响,水平井压裂液滤失量大、易产生多裂缝,且裂缝延伸距离相对较短.指出后续水平井布井应考虑水平段轴线与最小主应力方向平行,增大压裂设计规模和压裂级数,以保证煤层气水平井高效开发.【期刊名称】《煤田地质与勘探》【年(卷),期】2018(046)004【总页数】5页(P67-71)【关键词】煤层气;水平井;微地震;成像;裂缝监测【作者】张永成;郝海金;李兵;刘亮亮;徐云【作者单位】煤与煤层共采国家重点实验室,山西晋城 048000;易安蓝焰煤与煤层气共采技术有限责任公司,山西晋城 048000;煤与煤层共采国家重点实验室,山西晋城 048000;易安蓝焰煤与煤层气共采技术有限责任公司,山西晋城 048000;煤与煤层共采国家重点实验室,山西晋城 048000;易安蓝焰煤与煤层气共采技术有限责任公司,山西晋城 048000;煤与煤层共采国家重点实验室,山西晋城 048000;易安蓝焰煤与煤层气共采技术有限责任公司,山西晋城 048000;煤与煤层共采国家重点实验室,山西晋城 048000;易安蓝焰煤与煤层气共采技术有限责任公司,山西晋城048000【正文语种】中文【中图分类】TD712+.624;TE357.1+3微地震监测是目前水力压裂中最精确、最及时、信息最丰富的监测手段,可以及时指导压裂工程,客观评价压裂工程的效果,对下一步的生产开发提供有效的指导,降低开发成本[1]。
随着油气勘探难度的增加,微地震成像技术得到了迅速的发展,并且成为高精度地震勘探数据处理的关键技术。