羌塘盆地北部马料山侏罗纪布曲组地层古生物及沉积环境

详细描述了羌塘盆地北部乌兰乌拉湖地区马料山侏罗系剖面,将剖面划分为雀莫错组、布曲组和夏里组3个岩石地层单位,其中布曲组出露齐全,化石丰富。根据沉积环境及相对海平面变化规律将布曲组划分为2个沉积层序,并讨论了各体系域特征。依据马料山剖面布曲组的生物组合及分布特征建立了1个双壳类生物组合带即Chlamystipperi-Protocardiastricklandi组合带,并细分为3个组合亚带,其时限为中侏罗世巴通期。     

煤炭绿色开发地质保障体系的构建

掘锚自动化作业是煤矿巷道智能掘进的关键,针对当前掘锚设备交替作业过程中相对位姿测量和碰撞检测难题,提出一种数字孪生驱动的煤矿井下掘锚设备跟踪定位与碰撞检测方法。首先,为克服井下掘进工作面低照度、高粉尘、复杂背景干扰的影响,以多点红外LED标靶作为信息源,通过工业相机采集红外LED特征点图像,利用Hough轮廓检测与质心法提取光斑中心并通过二进制编码识别标靶ID,采用改进稀疏光流算法对光斑进行跟踪,同时建立基于PNP的掘锚设备位姿解算模型,采用对偶四元数获得设备间相对位姿。其次,利用数字孪生技术,基于Unity3D平台建立对应实际尺寸的掘锚设备及工作面数字孪生模型,利用Socket通信方式实现虚拟空间与物理实体之间的实时数据传输与交互,在虚拟空间中实现掘锚设备实时位姿的三维可视化,结合任意多边形OBB(oriented bounding box)碰撞检测算法,实现掘锚设备虚拟碰撞检测。最后,搭建实验平台进行掘锚设备位姿测量试验,同时对虚实运动轨迹和碰撞检测效果进行验证。实验结果表明：掘锚设备跟踪定位实验的位置误差不超过20 mm,角度误差不超过0.30°;虚实位置坐标对比中X轴方向最大误差不超过1.14 mm;Y轴方向最大误差不超过1.10 mm,能够保证系统虚实一致性和同步性,满足掘进工作面作业过程中掘锚设备实时跟踪定位及碰撞检测的要求。

     

楚雄盆地下侏罗统磨拉石楔沉积与含油性研究

楚雄盆地为一中生代周缘型走滑前陆盆地。通过对下侏罗统冯家河组沉积特征的详细研究与对比,作者认为早侏罗世是楚雄前陆盆地强烈坳陷与沉降的主要发展时期,从早期到晚期经历了一个突然变深又变浅的典型前陆盆地充填过程。在前陆冲断块体的不断逆冲和加载条件下,楚雄盆地西部早侏罗世沉积物的来源主要为哀牢山造山带隆起,其沉积环境以滨、浅湖或湖泊三角洲为主。位于盆地东北部的永仁中和、大姚龙街等地区的早侏罗世沉积物则来源于元谋古隆起,沉积特征亦显示其为滨、浅湖或湖泊三角洲相。位于盆地中部的楚雄会基关地区(楚参一井),下侏罗统沉积厚度急剧增加,测井曲线、录井资料以及岩心薄片鉴定、粒度分析均显示其沉积环境为深湖央浊积砂体。在新平叠社莫一带也发现有深湖相泥灰岩或灰泥岩沉积。由此表明,早侏罗世楚雄前陆盆地的沉降与沉积中心已经从晚三叠世的古哀牢山前缘向NE迁移至楚雄会基关以及新平叠社莫一带,盆地内的沉积物呈明显的前陆楔形体充填。大姚龙街地区冯家河组第三段中首先发现的沥青砂岩进一步增强了楚雄盆地产油气的可能性。根据产状,沥青砂岩分为缝隙型和粒间孔型两类,它们同产于逆韵律结构发育的湖泊三角洲相沉积层序。因此,对该区下侏罗统缝隙型圈闭以及岩性圈闭构造应予以足够的重视。     

松辽盆地深层侏罗系-下白垩统生物组合和沉积环境

本文描述了松辽盆地探井揭露的深层地层序列及其所产的5个牛物门类化石组合特征.9个孢粉组合是Monosulcites-Cyathidites组合、Pinaceae-Cyathidites-Osmundaeidites组合、Classopollis-Piceites组合、Lophotriletes-Cicatricosisporites组合、Paleoconiferus-Lygodiumsporites组合、Cyathidites-Leiotriletes-Clavatipollenites组合、Cicatricosisporites-Leiotriletes-Polyporopollenites组合、Leiotriletes-Schizaeoisporites-Classopollis组合和Trilobosporites-Cyathidites-Tricolpollenites组合.3个藻类组合是Vesperopsis-Australisphaera组合、Balmula granorugosa组合和Vesperopsis zhaodongensis组合.2个介形类组合是Cypridea unicostata-Limnocypridesadscondida组合和Mongolocypris limpida-Paracandona planiuscula组合.4个植物组合是Elatocladus submanchurica-Ginkgoites orientalis组合、Acanthopteris gothani-Pterophyllum组合、Sphenopteris johnstrupii-Coniopteris nympharum组合和Platanus septentrionalis-Protophyllum undulaturn组合.3个大孢子组合是Minerisporites sp.组合、Ricinospora leavigata-Galamospora sp.组合和Arcellites组合.还介绍了叶肢介、轮藻、双壳类和鱼类化石的产出情况.结合同位素资料认为：大庆群时代为中侏罗世,火石岭组可能为贝里阿斯期,沙河子组为凡兰吟期-欧特里夫期,营城组为欧特里夫期-巴列姆期,登娄库组为巴列姆期-阿普第期早期,泉头组一-二段为阿普第-阿尔卑期,并对各组沉积环境进行了初步分析.     

Origin of organic matter and paleoenvironment conditions of the Late Jurassic organic-rich shales from shabwah sub-basin (western Yemen): Constraints from petrology and biological markers

Late Jurassic organic-rich shales from Shabwah sub-basin of western Yemen were analysed based on a combined investigations of organic geochemistry and petrology to define the origin, type of organic matter and the paleoenvironment conditions during deposition. The organic-rich shales have high total sulphur content values in the range of 1.49–4.92 wt. %, and excellent source rock potential is expected based on the high values of TOC (>7%), high extractable organic matter content and hydrocarbon yield exceeding 7000 ppm. The high total sulphur content and its relation with high organic carbon content indicate that the Late Jurassic organic-rich shales of the Shabwah sub-basin were deposited in a marine environment under suboxic-anoxic conditions. This has been evidenced from kerogen microscopy and their biomarker distributions. The kerogen microscopy investigation indicated that the Late Jurassic organic-rich shales contain an abundant liptinitic organic matter (i.e., alginite, structureless (amorphous organic matters)). The presence of alginite with morphology similar to the lamalginite alga and amorphous organic matter in these shale samples, further suggests a marine origin. The biomarker distributions also provide evidence for a major contribution by aquatic algae and microorganisms with a minor terrigenous organic matter input. The biomarkers are characterized by unimodal distribution of n-alkanes, low acyclic isoprenoids compared to normal alkanes, relatively high tricyclic terpanes compared to tetracyclic terpanes, and high proportion of C₂₇ and C₂₉ regular steranes compared to C₂₈ regular sterane. Moreover, the suboxic to anoxic bottom water conditions as evidenced in these Late Jurassic shales is also supported based on relatively low pristane/phytane (Pr/Ph) ratios in the range of 0.80–1.14. Therefore, it is envisaged here that the high content of organic matter (TOC > 7 wt.%) in the analysed Late Jurassic shales is attributed to good organic matter (OM) preservation under suboxic to anoxic bottom water conditions during deposition.     

京西木城涧矿区窑坡组沉积体系及相关聚煤因素

通过实测剖面、岩矿鉴定、编制沉积断面图、砂体和煤层等厚图等资料分析,从京西木城涧矿区窑坡组中识别出湖泊沉积体系、河流沉积体系和沼泽沉积体系,并详细阐述了其成因相的岩相构成;在此基础上,指出窑坡组沉积早期为湖泊环境,主体沉积期为总体NE流向的网结河环境,其间伴随湖泊或河流周期性消亡而大面积泥炭沼泽化形成了稳定的可采煤层和含煤沉积旋回。富煤带总体呈NE50°～80°展布,与泥炭沼泽沉积期下伏不同沉积相的压实效应有关,后者通过影响地表起伏和积水深度,控制着泥炭的堆积速率和厚度。     

Radiative association in Li+H revisited: the role of quasi-bound states

The role in radiative association of narrow resonances arising from quasi-bound levels is examined. For the rate coefficient the contribution from such levels is readily calculated in terms of the Einstein A -coefficient from bound rovibrational levels generated using a suitable alternative boundary condition. By locating systematically all the quasi-bound levels, an enhancement by more than an order of magnitude of the rate coefficient for Li(2s) + H(1s) association above about 600 K is obtained. The effect on the LiH abundance in the early Universe is no more than an increase of a factor of 3 for limited ranges of values of the redshift. For the Li(2p) state the effect of narrow resonances appears to have been taken into account in previous calculations.     

甘肃侏罗纪植物化石Ginkgo huttonii角质层地球化学特征

对甘肃民和盆地侏罗纪植物化石Ginkgo huttonii(Sternb．)Heer的角质层与现生银杏Ginkgo biloba的角质层进行了地球化学特征对比分析,结果表明植物化石角质层有机物特征符合石油形成中沥青的演化特点。通过有机物组分含量分析,它们相当于中国中、新生代油源岩有机质类型中的腐泥型一腐殖腐泥型。对烃组分三角图进行投点,落入Ⅱ型干酪根范围内。通过有机质中的一些指标分析,发现Ginkgo huttonii的角质层处于低成熟阶段,与煤中显微组分角质体的成烃模式基本一致。另外,角质层的可溶有机质分布特征表明,植物化石角质层对陆相高蜡原油的形成有一定的作用,证明高等植物对蜡质有贡献。当前研究及古植物学资料表明,银杏是一种有利于煤成油的植物。     

用翁氏模型图版设计早期油气田(藏)开发方案

由于缺乏早期资料，设计早期油气田（藏）开发方案是非常困难的。在制作翁氏模型的Qctm/No-ER图版和ER-ctR图版过程提出根据探明储量No、经济极限产量Qc、假定达到峰值产量的时间tm、最终采收率ER，由翁氏模型的Qctm/No-ER图版求取增长指数b，由翁氏模型ER-ctR图版求取ctR，再求出其他参数及所有的油气田（藏）开发指标，完成早期油气田（藏）开发方案设计。     

新疆早-中侏罗世聚煤期同沉积构造及其控煤效应

新疆早-中侏罗世同沉积（期）构造活动自始至终与聚煤作用相伴,并直接影响含煤地层发育程度和煤层的原生厚度及结构。该期同沉积构造活动受特提斯-喜马拉雅地球动力学体系控制,其主要活动方式表现为同沉积逆冲断层和同沉积正断层,从而造成聚煤盆地基底沉降速度与幅度的明显差异。在其控制下,聚煤盆地的沉积中心和赋煤中心有自西向东、由南向北迁移的趋势;从含煤区尺度进行比较,聚煤强度与盆地基底总体沉降幅度呈负相关关系;从含煤盆地或煤田尺度进行比较,聚煤强度与盆地基底沉降速度之间的关系分别表现为正相关型、抛物线型及负相关型。