陈堡油田陈3断块开发中后期三维地质建模

根据陈堡油田的开发现状,开展精细油藏描述,建立完善的三维地质模型,进一步研究剩余油分布规律是油田开发中后期稳产的关键。以陈堡油田陈3断块油藏为研究对象,分析总结了储层地质与沉积微相特征,认为该区白垩系泰一段第三砂层组属扇三角洲平原亚相、赤山组属风成沉积。在小层细分与对比、沉积相、储层物性等研究的基础上,以完善的储层地质知识库为支撑,采用Petrel建模软件,成功的建立了该区泰一段第三砂层组-赤山组的三维地质模型。     

牵引流砂质载荷沿陡坡滑动形成砂质碎屑流沉积模拟研究

斜坡沉积体系中的砂质碎屑流沉积是斜坡带的主要储集体类型,也是现阶段储层研究的热点之一。随着大陆勘探程度的不断提高,由陆向海过渡的斜坡带是今后勘探领导的新战场。基于此,本研究具有前瞻价值和实际指导意义。作者利用沉积模拟实验技术,考虑不同的斜坡长度、坡度和湖水深度,详细分析了点物源碎屑流形成深切谷和发育碎屑流的临界坡度、高差,深入探讨了斜坡带上砂质碎屑流形成及发育的控制因素,细致刻划了点物源碎屑流沿坡折带搬运方式、演化特征及其沉积作用规律。     

贵州福泉地区晚陡山沱期磷矿成因及古地理控矿意义

福泉磨坊和英坪磷矿是陡山沱期磷矿的典型矿床之一,其中陡山沱期磷矿的上矿层(b矿层)开采条件较好、含磷资源量较大及品位较高的海相含碘磷块岩矿床为典型的特征。主要类型为砂屑磷块岩、含磷质或白云质团块状磷块岩和致密块状磷块岩,矿层下部发育有条带状构造,P2O5品位较高,并矿层下部向上逐渐增高。研究区晚陡山沱期与磷矿有关的沉积环境为聚磷浅滩相,它是经历了一次陆地抬升之后又下降接受沉积发展而来的。在该层底部存在一侵蚀面,它对磷块岩的沉积厚度具有一定的影响。     

塞拉利昂北方省MALUMPO铁矿NHC-4矿段地质特征及找矿标志

MALUMPO铁矿位于塞拉利昂中东部的苏拉山-坎格瑞丘陵(Sula Mountain-Kangari Hill)弧形构造带转折部位,产于太古宇绿岩带内,为沉积变质铁矿床(BIF型)。NHC-4矿段主矿体规模大,呈层状、似层状,具有分支复合、膨大收缩现象,与围岩整合接触,采用平行断面法进行资源量估算,探获(332+333)铁矿石资源量上亿吨。文章通过分析成矿地质条件,认为该类矿床的磁异常具有一定的规律性,精度磁测所获得的正负异常交替处是寻找磁铁矿的有利部位,太古宇坎布伊岩群为主要找矿目标层。     

陆相盆地古气候变化与环境演化、聚煤作用

为了揭示陆相盆地古气候变化与沉积环境、聚煤作用耦合关系,应用同位素地球化学、煤岩学等理论和方法,进行了柴北缘中侏罗统大煤沟组上段(巴柔期)主采煤层煤岩组分、有机碳同位素组成(δ13CO)及其古气候意义研究。研究煤层(7号和F煤层)δ13CO值平均为-23.9‰,分别变化在-26.7‰~-21.6‰和-25.6‰~-22.9‰。根据沼泽、陆源碎屑体系交替演化特征和煤层有机碳δ13CO值变化规律,将大煤沟组上段划分为8个阶段并对应于1个长周期旋回(C1)和3个短周期旋回(C2)。认为低变质煤δ13CO值在反映古大气CO2同位素组成及其含量变化的同时,还记录了聚煤期(植物生长至泥炭化阶段末)古气候(温度和湿度)的变化:湿暖古气候有利于成煤植物对碳同位素分馏及贫13C腐殖质(镜质组前身)的形成,煤δ13CO值降低;干热古气候不利于植物对碳同位素的分馏,但有利于富集13C的惰质组(丝质体)形成,进而引起煤δ13CO值升高。从煤层δ13CO值所反映的气候变化与陆源碎屑体系废弃、复活及聚煤发生、终止关系角度提出了陆相盆地古气候与沉积环境、聚煤作用关系模型,指出在盆地构造活动、基底沉降较稳定和均匀的煤系沉积过程中,气候变化通过盆地和流域内径流深度(年平均降雨量减去年平均蒸发量)和植被发育演化控制了绝对湖平面变化、沉积物的产生和搬运(供给)速率,进而引起盆地内沼泽、陆源碎屑两种矛盾体系的交替与演化。     

Temperature-controlled triaxial compression/creep test device for thermodynamic properties of soft sedimentary rock and corresponding theoretical prediction

In deep geological disposal of high-level nuclear waste,one of the most important subjects is to estimate long-term stability and strength of host rock under high temperature conditions caused by radioactive decay of the waste.In this paper,some experimental researches on the thermo-mechanical characteristics of soft sedimentary rock have been presented.For this reason,a new temperature-controlled triaxial compression and creep test device,operated automatically by a computer-controlled system,whose control software has been developed by the authors,was developed to conduct the thermo-mechanical tests in different thermal loading paths,including an isothermal path.The new device is proved to be able to conduct typical thermo-mechanical element tests for soft rock.The test device and the related testing method were introduced in detail.Finally,some test results have been simulated with a thermo-elasto-viscoplastic model that was also developed by the authors.     

论西塔里木晚古生代弧形海相热水-火山热水沉积型铅锌（铜）矿区域成矿特征

西塔里木弧形晚古生代海相热水-火山热水沉积铅锌(铜)矿的蕴矿基础是恰尔隆-库尔良拉张坳陷带的一部分,奥依塔格裂陷槽,和西南天山柯坪断隆外缘(木兹都克)构造过渡带.这个弧形矿带的亚一级构造是弧顶区昆盖山北坡裂谷,属古隆外缘拉张坳陷带,产海相火山热水沉积型S、Cu、Zn、Au矿.弧西区塔木-卡兰古坳拉槽(夭折裂谷)产海相热水沉积型Pb、Zn(Cu)矿.弧东区西南天山木兹都克构造过渡带,产海相热水-火山热水沉积型Pb、Zu、Cu矿.这个弧形矿带中的矿产,其成矿与控矿构造具有一致性,成矿时代具有相对集中性、矿产生成具有迁移性、区域成矿特征具有可对比性,是新疆最为重要的铅锌成矿区带.     

牛庄洼陷沙三下—沙四上泥页岩特征及沉积环境

为了明确非常规油气藏中不同泥页岩岩石类型与沉积环境的关系,针对不同泥页岩特征及沉积成因问题,通过岩心观察,利用岩矿薄片、扫描电镜、显微荧光以及元素分析等分析化验手段,开展了牛庄洼陷沙三下—沙四上泥页岩沉积环境分析及其与泥页岩岩相类型的对应关系研究.结果表明:牛庄洼陷沙三下—沙四上泥页岩共发育纹层状泥质灰岩、纹层状灰质泥...     

Effect of operating factors on liquid–liquid mass transfer and dispersion pattern of sedimentary liquid in a mechanically stirred vessel

Liquid–liquid dispersion and mass transfer were investigated in mechanically stirred vessels without baffles by changing operation factors such as an impeller rotation speed, off-bottom clearance, volumetric liquid ratio, etc. The dispersion regime was categorized into five groups: the sedimentary liquid was kept at the vessel bottom (I), partially elevated without any collision (II), partially dispersed by colliding with the impeller bottom (III), both liquids were partially dispersed by collisions with impeller blades (III’), and the sedimentary liquid was completely dispersed (IV). The dispersion switched to I → II → III → IV with the increasing rotation speed and decreasing off-bottom clearance. The liquid–liquid mass transfer rate was significantly enhanced with the collision of the sedimentary liquid with the impeller bottom, and subsequently increased with the increasing rotation speed, volumetric liquid ratio, and vessel diameter and with the decreasing off-bottom clearance. A multiple regression analysis method was applied to determine the mass transfer rates of III and III’.     

莺山断陷北部沙河子组沉积特征展布规律研究

针对莺山断陷北部沙河子组沉积相带变化快、钻遇井较少、沉积分布规律及物源认识不清等问题,采用单井相、地震相分析等手段开展研究区沉积特征研究。结果表明,研究区发育湖泊相、辫状河三角洲相、扇三角洲相,其中扇三角洲相包括3亚相9种微相,辫状河三角洲包括2亚相6种微相,湖泊相包括2亚相4种微相。依据地震反射特征,将其地震相划分为3类:①平行、中低振幅、连续;②似平行、中低振幅、中低连续性;③杂乱反射、中低振幅、断续。结合区域构造特征,表明研究区沙河子期主要受三支物源体系控制（西北部、东北部、东南部）,最终明确各个砂组沉积演化规律,每个砂层组时期沉积类型存在差异。该研究成果可为莺山断陷北部沙河子组勘探部署提供指导。