Method on Pore Structure of Tight Reservoir

<正>1 Introduction The physical properties of tight reservoir depends largely on its micro and super-micro pore structures,which mainly includes the size of pores and throats and their distribution,the collection form of pores and throats space,the connectivity among pores and throats and so on.The size of     

Fine Geological Modeling of the Tight Oil Reservoir

<正>1 Introduction The study area of Northern Honggang is located in the Daan-Honggang terrace in the central depression of the southern Songliao basin,covering an area of 110km2.The oil field is categorized as an ultra-low permeability reservoir and the target horizon is the Fuyu oil layer.The reservoir is characterized as poor physical property,strong     

The Study of The Tight Sandstone Reservoir’s Characteristics and The Fluid Inclusions in Fuyu Oil Layer, Daqing Placanticline

<正>1 Introduction The exploration and development of unconventional oil and gas is gradually becoming the new hot topic,which is promoted by the increasing demand of oil and gas,as well as the decline in conventional oil and gas production(Jia et al.,2012;Zou et al.,2012).The researches of unconventional oil and gas resources started late in China,while the resources are widely distributed,including     

Critical Controlling Factors of Shale Gas Enrichment and Accumulation, and Remaining Uncertainties

<正>Shale gas exploration have yielded remarkable achievements recently in China,and four national demonstration areas for shale gas exploration and production have been established respectively as FulingJiaoshiba,Changning-Weiyuan,Zhaotong and Yanchang.During recent few years,nearly 400 wells have been drilled including 143 exploratory wells(vertical wells)and     

The Formation and Evolution Mechanism of Tight Oil and Gas in Lacustrine Carbonate Rocks in the Bohai Bay Basin

<正>Tight oil,a kind of unconventional oil accumulation that accumulates in source rocks in a free or adsorbed status in low or ultra-low porous sandstones or carbonates rocks which are interbedded with or adjacent to source rocks.Generally,the oil has not experienced a large-scale,long-distance migration(Zhang Jinchuan,et al.,2012;Jia     

中蒙边界中东部地区奥陶纪地层划分与对比

在中蒙边界1∶100万系列地质图件编制过程中,有关中东部地区奥陶纪地层层序和时代归属问题存在一定的异议。文章根据中蒙两国1∶20万区域地质图件及生物地层学资料结合野外地质踏勘,讨论了中蒙边界中东部地区奥陶纪地层层序和时代归属。详尽的地质资料及野外踏勘显示,中蒙边界蒙古地区发育的奥陶纪地层可以和相邻地区的中国奥陶纪地层进行对比。蒙古北山地区的Ehenhaya组和Adagbaishint组下段可以和罗雅楚山组相对比;Adagbaishint上段可与咸水湖组相对比;Naransevestei组与白云山组应为同一套地层。在Saishand地区,除自中国境内延伸来的乌宾敖包组和巴彦呼舒组延伸到蒙古外,Zeeriinhural组可以与裸河组进行对比;Naransevestei组与白云山组应为同一套地层。蒙古东部Khalkh gol地区的Bukhat uul组应分为两部分,下段与多宝山组相似,其时代属于早-中奥陶世;上段可以与裸河组进行对比,时代为中-晚奥陶世。     

广西某铅锌矿区水文地质及地下水重金属污染途径分析

文章在对广西某铅锌矿矿区水文地质条件分析的基础上,采用连通试验对地下水动态特征及其影响因素进行分析评价。实验结果表明,矿山区域地下水流经地下巷道携带大量重金属离子由废旧矿洞口排出地表,地表水流经地表废旧矿渣堆场携带大量污染物和矿洞水汇成溪沟,然后以地表径流方式污染长屯的土壤和水系,最终由长屯南伏流入口汇入洞零水库。尾矿库区域地下水通过地下岩溶管道和溶蚀裂隙向长屯洼地径流,经长屯南伏流入口,汇入洞零水库。     

内蒙古达茂旗阿拉格敖包地区英云闪长岩地球化学特征及构造背景

内蒙古达茂旗阿拉格敖包地区位于华北板块北缘增生带。对区内英云闪长岩岩石地球化学研究表明:岩石具有较低的w(SiO2)(68.71%~70.53%)和较高的w(Al2O3)(13.82%~14.42%),贫碱(w(Na2O+K2O)=5.69%~6.37%)、富钠贫钾(Na2O/K2O=6.29~9.40)的特点,A/CNK值为0.98~1.26,显示铝弱饱和;岩石稀土总量较低(89.2×10-6~132.94×10-6),轻重稀土分馏不明显[(La/Yb)N=2.75~4.57],具有弱的负铕异常和负铈异常;相对富集不相容元素Rb,Th,U,LREE,亏损Ba,Ta,Nb,Sr,P,Ti等高场元素;属准铝质-弱过铝质低钾I型花岗岩。分析表明,英云闪长岩总体经历了较低程度的部分熔融和结晶分异,源区为下地壳基性岩部分熔融,同时混有地壳物质;构造环境为内陆造山环境,指示华北板块与西伯利亚板块在二叠纪末已完全闭合,英云闪长岩是在造山后的伸展环境下,地幔上涌与地壳中具有洋壳性质的岩石相互作用而形成,具有岛弧花岗岩性质,为滞后型岩浆岩,代表了岩浆来源具有壳幔混合的特征。     

流动沙丘水分深层入渗量与降雨的关系

为分析流动沙丘水分深层入渗与降雨的关系,采用YWB-01型水分深层渗漏记录仪,运用土壤水动力学原理,研究了毛乌素沙地流动沙丘降雨入渗水分传递过程及地表以下150 cm深度入渗补给特征.结果表明:流动沙丘深层土壤水分来源主要为降雨入渗,2010年入渗补给量为141.4 mm,2011年为355.8 mm,分别占同期降雨量的55.1%和68.2%.深层入渗主要补给期为5—11月,期间补给量占全年总量的95%.当土壤水分条件保持在田间持水量范围之内时,降雨过程对土壤150 cm深度的补给作用主要受降雨量和降雨强度的影响,入渗量与降雨量呈极显著正相关(P<0.01),降雨通常在30~48 h后渗透补给到150 cm深层土壤,入渗补给速率在前3~5 h呈快速上升趋势,3~8 h左右达到最大值,此后缓慢下降,整个入渗补给过程可以持续96 h以上.     

新疆伊吾淖毛湖金矿床地质特征及成矿模式

根据对淖毛湖金矿床地质特征分析,认为淖毛湖金矿床的形成与火山一岩浆及构造活动关系密切.沿构造蚀变带产出的黄铁绢英岩出露地段往往是金矿体产出地段,是直接找矿标志.下泥盆统托让格库都克组火山岩地层、浅成的小规模中酸性侵入体(如闪长玢岩、闪长岩等)、岩屑化探Au、Ag、As、Co、Cu、Zn综合异常分布范围以及激电测量表明的低阻中高极化异常区带,均是间接找矿标志.