正交各向异性岩体孔径变形法的二维地应力分析方法改进

根据正交各项异性材料的弹性理论,推导出偏轴坐标系下的三维、二维本构方程;利用应力变分法对钻孔周围的应力分布作出修正,进一步得出孔壁径向位移的计算公式。结合孔径变形法测量地应力的特点,建立正交各向异性岩体地应力的分析理论,通过一典型工程与传统的各向同性理论进行了对比。     

Unconventional Energy Resources and Geospatial Information: 2006 Review

This article contains a brief summary of some of the 2006 annual committee reports presented to the Energy Minerals Division (EMD) of the American Association of Petroleum Geologists. The purpose of the reports is to advise EMD leadership and members of the current status of research and developments of energy resources (other than conventional oil and natural gas that typically occur in sandstone and carbonate rocks), energy economics, and geospatial information. This summary presented here by the EMD is a service to the general geologic community. Included in this summary are reviews of the current research and activities related to coal, coalbed methane, gas hydrates, gas shales, geospatial information technology related to energy resources, geothermal resources, oil sands, and uranium resources.

莱芜市冷家庄地热田地质特征浅析

莱芜市冷家庄地热田地热资源类型属层状兼带状,热源为高庄-冷家庄断裂沟通导热,盖层是第四系、古近系、石炭-二叠系。热储层为奥陶纪灰岩,该热储层顶板埋深2 100m左右,热储层厚度由南向北逐渐增大,地热流体中富含氟、锶、偏硅酸等微量元素,为结垢非常严重,锅垢很多的腐蚀性水。经计算,奥陶纪热储层单井可采资源量为7.83×105 m3/a。     

威海市环翠区浅层地热能开发利用适宜性分区研究

浅层地热能资源作为一种可再生、环保、清洁、储量巨大的新型能源资源,逐渐被人们认识、接受和重视。该文选取层次分析法、综合指数法为主要研究方法,对威海市环翠区进行了浅层地热能适宜性分区,为威海市环翠区更好的开发利用浅层地热能资源提供了重要的依据。     

岩体完整性指标IRMI的工程应用与分析

岩体完整性指标（IRMI）是基于钻孔成像技术的评价岩体完整性的新指标,定义为全孔孔壁图像中岩体完整特征I与孔壁岩体长度（即完整特征I与破碎特征F之和）之比的百分数,即IRMI = I / (I + F)。钻孔成像技术在青岛海湾大桥基础勘察工程中取得了成功应用,获得了大量的第一手资料。通过与钻探和其他岩石质量估算法的对比分析,得出(1) 钻孔摄像弥补了钻孔取芯的不足;(2) 全孔图像为实现准确的岩体完整性评价创造了条件;(3) IRMI能准确地反映岩体完整特征;(4）IRMI通常大于RQD。     

辽宁省中新生代盆地地下热水富集规律研究

辽宁省中新生代盆地地层中赋有有丰富的地热资源.这些地热田分布广,热储层位稳定,地温温度高,其所在地层岩性有较好的富水性能,地热能储存量较大,具有良好的勘查开发前景.盆地深部地热预测可划分4个地段:(1)基底翘起热储浅埋地段;(2)断块凸起热储深埋地段;(3)盆地中心热储超深埋地段;(4)冷水干扰低-中温过渡地段.辽宁省中新生代盆地交通便利,人口集中,地热资源的应用有着良好的发展前景.以煤炭,石油及天然气等能源发展起来的城市煤炭资源已近枯竭,油气资源开发利用也有一定的时限,在能源结构调整中,地热资源已显现出了它的蓬勃生机.对地热资源的开发利用能够节省大量宝贵的煤炭、油气等不可再生的有机化学资源,这对今后将产生不可估量的资源效益.地热资源是一种环保型资源,它的开发利用无疑在解决资源问题的同时也在环境建设方面做出了贡献.     

煤矿井下水平定向钻进技术的发展

国内外煤矿井下水平定向钻进技术(HDD)的发展具有不同的技术路线,这涉及钻进设备和钻具、钻孔监测仪器的研发,钻孔轨迹控制理论的研究等。本文阐述了煤矿井下HDD技术在国内外的发展特点及我国在该领域未来几年的发展方向。      

辽宁地热资源与开采潜力研究

辽宁省地热田点的出露与分布受E-W、NE-NNE、NW向断裂构造控制,目前主要集中分布在丹东-岫岩-安波、鞍山-本溪、熊岳-龙门汤、锦州-兴城-绥中、盘锦、凌源等地.地下热水根据形成类型可分为断裂型、断裂与基底隆起型、沉积盆地基底断裂型、深部构造地热异常型、非地热异常型;按赋存条件可分为孔隙次生热水、基岩裂隙溶隙热水和碎屑岩类裂隙孔隙热水3种类型.热源主要来自地幔对流热及放射性元素蜕变热.地下热水主要受大气降水补给,其温度的高低与循环速度及深度有关.地热资源主要用于医疗保健、民用采暖、养殖以及旅游、健身、娱乐等方面,已取得较好的经济效益和社会效益,有31个地热田点得到不同程度的开发,但总的开发量不足总资源量的1%,低温地热的资源量十分巨大,具有极大的开发潜力.随着经济技术条件的不断发展,大城市、经济发达地区的非地热异常型地热开发将会有快速的发展,2000m将成为非地热异常区的主要开发深度.     

深井巷道围岩地温场温度分布可视化模拟研究

根据地温场温度分布的数学模型,应用有限元法模拟了深井巷道围岩地温场中4种常见隧道断面的岩石温度分布特征规律,揭示出地温场内温度分布和地热学参数及时间、空间之间的本质关系,实现地温场内温度分布的二维动态等值线表征,直观地再现了地温场内温度分布非稳态变化的动态过程。     

Integral equation solution for three-dimensional heat transfer in multiple-fracture enhanced geothermal reservoirs

For the prediction of energy production from multiple-fractured geothermal reservoirs, previous models basically focused on the one-dimensional conduction in the rock containing evenly distributed fractures of equal scale. Here, a novel model is described to numerically investigate the three-dimensional heat transfer in geothermal reservoirs with unevenly spaced disc fractures of various sizes including the aperture and radius. In terms of the water flow through each fracture, an approximate analytical solution is obtained on the assumption that the water pressure disturbances, induced by the fracture margin and extraction (injection) operation, at the injection (extraction) well center and at different locations within the injection (extraction) well range were approximately equal. By the integral equation scheme for two-dimensional planar fractures, the three-dimensional problem of heat exchange is simulated without the reservoir discretization. The singular integral is analytically calculated in polar coordinates whereas the nonsingular integrand is numerically estimated by the Gaussian quadrature method in Cartesian coordinates. Compared with the one-dimensional simplification, the three-dimensional heat conduction remarkably alters the prediction of extraction temperature. In addition, the reservoir temperature field is also significantly influenced by the spacings and dimensions of fractures. The present model may be used for the estimation, design, and optimization of a geothermal reservoir.