长庆油区提高延长统油层稳产水平的先导性试验——陶粒压裂井的效果     

谢正温  李武平  赵宏民  温亚魁  张摩西 《西北地质》2001,34(2):82-87

长庆油区为解决低渗油田稳产问题，选择了一批井进行了高强度支撑剂压裂试验。本文对16口压裂井投产后的稳产效果进行了研究，得出该工艺适合的油层特点。  相似文献   

The heat capacity of two natural chlorite group minerals derived from differential scanning calorimetry     

C. Bertoldi  A. Benisek  L. Cemic✓  E. Dachs 《Physics and Chemistry of Minerals》2001,28(5):332-336

The heat capacity of natural chamosite (X_Fe=0.889) and clinochlore (X_Fe=0.116) were measured by differential scanning calorimetry (DSC). The samples were characterised by X-ray diffraction, microprobe analysis and Mössbauer spectroscopy. DSC measurements between 143 and 623?K were made following the procedure of Bosenick et?al. (1996). The fitted data for natural chamosite (CA) in J?mol^?1?K^?1 give: C _p,CA = 1224.3–10.685?×?10³?×?T ^??0.5???6.4389?× 10⁶?×T ^??2?+?8.0279?×?10⁸?×?T ^??3 and for the natural clinochlore (CE): C _p,CE = 1200.5–10.908?×?10³?×T ^??0.5?? 5.6941?×?10⁶?×?T ^??2?+?7.1166?×?10⁸?×?T ^??3. The corrected C _p-polynomial for pure end-member chamosite (Fe₅Al)[Si₃AlO₁₀](OH)₈ is C _p,CAcor = 1248.3–11.116?× 10³?×?T ^??0.5???5.1623?×?10⁶?×?T ^??2?+?7.1867?×?10⁸×T ^??3 and the corrected C _p-polynomial for pure end-member clinochlore (Mg₅Al)[Si₃AlO₁₀](OH)₈ is C _p,CEcor = 1191.3–10.665?×?10³?×?T ^??0.5???6.5136?×?10⁶?×?T ^??2?+ 7.7206?×?10⁸?×?T ^??3. The corrected C _p-polynomial for clinochlore is in excellent agreement with that in the internally consistent data sets of Berman (1988) and Holland and Powell (1998). The derived C _p-polynomial for chamosite (C _p,CAcor) leads to a 4.4% higher heat capacity, at 300?K, compared to that estimated by Holland and Powell (1998) based on a summation method. The corrected C _p-polynomial (C _p,CAcor) is, however, in excellent agreement with the computed C _p-polynomial given by Saccocia and Seyfried (1993), thus supporting the reliability of Berman and Brown's (1985) estimation method of heat capacities.  相似文献   

吉林省四平南部下二台群小壳化石的发现及其地质意义     

佟文选  王福泰  任锡钢 《吉林大学学报(地球科学版)》1992,(1)

吉林省四平南部1:5万半拉山门、石岭街、下二台子、叶赫站幅的吉林省境内区调,首次在经过修订的下二台群黄顶子组下部条带状硅质大理岩中,采获丰富的小壳化石,初步确定为3属6种,其中4新种。属于辽北地区新确立的清河镇动物群辐射演化而来的新的动物群。从而,为这套地层的划分对片、时代确定,提供了重要的古生物佐证。  相似文献   

南极菲尔德斯半岛南部近岸水域中粪大肠菌群分布的初步研究   总被引：1，自引：0，他引：1       下载免费PDF全文

黄凤鹏  丁美丽 《极地研究》1992,4(4):84-87

本文采用发酵法对菲尔德斯半岛南部近海水域表层中粪大肠菌群数量进行了初步调查。结果表明 ,在近岸表层海水中 ,粪大肠菌群检出数密度最大的 40个 /升 ,一般是 2 0个 /升 ,密度最小的小于 2 0个 /升 ,后者占多数站位。排污口潮间带 1月份粪大肠菌群检出数 40个 /升 ,3月份 2 80 0个 /升。粪大肠菌群的分布 ,离岸越近数量越高 ,同频繁的人类活动有密切关系。由此看来菲尔德斯半岛南部近岸水体已受生活污水污染 ,尚属轻度污染。但排污口潮间带的污染趋势应引起我们重视  相似文献   

太行山中北段褶皱构造序列     

牛树银  国连杰 《华北地质矿产杂志》1995,10(2):190-196

太行山中北段中－深变质岩区的褶皱构造变形复杂，不同期次间叠加改造强烈，构造置换作用明显，作者采用变质岩区构造解析方法，在观察，测量，分析了大量构造面，线组构的基础上，划分出５期褶皱构造，建立了本区的构造变形序列，并认为构造变形经历了从强塑性变表到韧脆性变形的演化过程，反映出地壳从纵向增厚作用转变为变质核杂岩隆升的演化过程。  相似文献   

板溪群研究的动向与亟待解决的问题   总被引：4，自引：0，他引：4  

李曰俊  郝杰 《湖南地质》1993,12(1):8-10,14

按多重地层划分原则,板溪群作为雪峰一武陵山区上元古界的一个岩石地层单位,已为多数学者所接受。但80年代以来,许靖华教授提出了中生代板溪蛇绿混杂岩的观点,引起国内外学者的关注。产生分歧的根本原因是对板溪群地层学涵义的认识不一致;当前板溪群研究存在如下亟待解决的问题:1)板溪群地层学涵义的混乱;2)关于板溪地层性质的认识分歧;3)关于板溪群时代归属的不同认识。  相似文献   

Three-dimensional structure of the crust and upper mantle beneath the south China area from long period surface waves     

《地震学报(英文版)》1993,6(3):619-629

In the present study the long period surface wave records of 238 wave-paths from 79 earthquakes within China and its adjacent regions received by 30 seismic network stations are measured by using the improved match-filtering frequency-time analysis technique and the grid dispersion inversion method to obtain the rayleigh pure-path dispersion values for 147 slant grids of 4° × 4° in this area, then a three-dimensional shear wave velocity model of the crust and upper mantle beneath south China area to a depth of 170 km is inversed. It is found that there are obvious differences among the main structural units, and there are also certain differences among the subordinate elements even in the individual unit. The crustal thickness of this area is ranging from 30 to 43 km, and is getting thicker gradually from the east to the west. The average shear velocity of crust is ranging form 3.48 to 3.68 km/s with the lowest in the northeast part and highest in the west part. No obvious crustal low velocity layer of large scale is detected. There exist upper mantle low velocity zones in the most of south China area with the starting depth ranging from 75 to 106 km. The lowest shear velocity within the low velocity zones is about 4.28–4.38 km/s. Despite of the existing of upper mantle low velocity zones beneath the most of south China area, the interfaces between the important layers are quite clear, the variation of the bedding surfaces is very gentle, and the lateral changes measured in a larger scale of the underground structure are rather small. It may indicate that the crustal and upper mantle structure of the main part of south China area belongs to the relatively stable structure of the continental blocks except for the fringe areas such as the fold-faulted region in the west part and the fault system along the southeastern coast which may belong to the tectonically active area. The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 159–167, 1993. This subject is supported by the National Science Foundation of China.  相似文献   

水平离散网格与大气运动   总被引：8，自引：0，他引：8  

LIU Yudi  WANG Bin  JI Zhongzhen 《大气科学进展》2003,20(1):139-148

从线性浅水方程组出发,在Arakawa A-E网格和z网格上,从频率和群速方面讨论了这六种网格对大气中的两种重要的波动：惯性重力波和Rossby波的描述能力。结果表明：C、z、E网格比其它网格产生的歪曲都要小。  相似文献   

水平荷载作用下群桩相互作用的弹塑性数值分析   总被引：5，自引：0，他引：5  

周洪波  杨敏  茜平一 《水文地质工程地质》2003,30(3):29-35

本文利用三维弹塑性有限元法对水平荷载作用下群桩基础特性进行了分析,讨论了群桩基础水平荷载作用下的承载性状和破坏机理,并探讨了桩距、桩数、桩长、桩径和土质各种因素对群桩效应的影响,指出桩距和桩数是影响群桩效应的主要因素。  相似文献   

地质灾害的非线性数据处理与建模技术   总被引：3，自引：1，他引：2  

许强  黄润秋 《山地学报》2000,18(Z1):123-127

本文简略地介绍了几种地质灾害数据处理与建模的非线性方法,主要包括GMDH自组织建模技术、神经网络方法。GMDH是一种高阶非线性回归建模方法,它是以简单的二元二次回归方程为基础,通过"代复一代"的"生产"过程,客观、自动地求得实际资料的非线性模型。而神经网络则是用工程技术手段模拟生物神经网络的结构特征和功能特征的一类人工系统。与常规统计方法相比,神经网络最突出的优点为它是通过对网络的学习和训练,来掌握变量之间的非线性关系。因此,其处理复杂问题的能力更强大。实例检验效果表明,这些非线性数据处理与建模技术考虑了地质灾害问题的非线性特性,其比基于常规统计理论的数据处理方法的精度要高得多。  相似文献