Influence of Salt Beds on the Segmentation of Structure and Hydrocarbon Accumulation in Qiulitag Structural Belt, Tarim Basin, China

Seismic information and balanced profile technology were used to reveal the influence of the salt bed in segmentation of structure and hydrocarbon accumulation in Qiulitag structural belt in Tarim basin. From west to east, the shortening of strata above the salt beds gradually decreases, while,the shortening below the salt beds gradually increases, which shows that the segmentation of structure integrated the seismic profile. There is great difference of the deformation of strata below and above the salt beds between the west segment and the east segment. The analysis of the distribution of oil/gas fields and the hydrocarbon properties indicates the similar segmentation to the structure segmentation.The salt beds in relatively shallow layers change the stress condition from basement of Kuqa foreland basin, which leads to the segmentation of Qiulitag structural belt. Because the salt beds in the west segment came into being earlier than those in the east segment, the west segment captures hydrocarbon from two sets of source rock, while the east segment can only capture hydrocarbons from one set of source rock. So, the salt beds play an important role in the segmentation of structure and hydrocarbon accumulation.     

库车前陆冲断带博孜—大北万亿方大气区的形成机制

库车前陆盆地克拉苏构造带博孜—大北地区超深层是塔里木油田目前油气勘探的重点领域,评价天然气资源量超万亿方。基于岩心、薄片、分析化验、测井及生产资料,对博孜—大北地区的油气源、储层、盖层特征进行分析,系统研究了该地区油气输导与充注特征,深入分析了博孜—大北地区油气成藏条件和油气聚集过程,明确了博孜—大北万亿方大气区的形成原因。研究结果表明:油气成藏具有“早期聚油,晚期聚气,超压充注,垂向输导、高效聚集”的总体特征。“早期浅埋、晚期快速深埋”使烃源岩具备持续生烃能力;良好的储、盖配置关系和断裂体系的垂向输导为油气的运聚提供了先决条件。成熟-过成熟的烃源岩,平面成排成带、垂向叠置分布的圈闭群,优质储层相带以及巨厚膏盐岩盖层在博孜—大北地区有效叠合,形成高丰度、超高压的大气藏群。     

Structural Variation between the Western and Eastern Kuqa Fold-and-thrust Belt, China: Insights from Seismic Interpretation and Analog Modeling

The Kuqa fold-and-thrust belt exhibits apparent structural variation in the western and eastern zone. Two salt layer act as effective decollements and influence the varied deformation. In this study, detailed seismic interpretations and analog modeling are presented to construct the suprasalt and subsalt structures in the transfer zone of the middle Kuqa and investigate the influence of the two salt layers. The results reveal that the relationship of the two salt layers changes from separated to connected, and then overlapped toward the foreland in the transfer zone. Different structural models are formed in the suprasalt and subsalt units due to the interaction of the two salt layers. The imbricate thrust faults form two broom-like fault systems in the subsalt units. The suprasalt units develop detached folds terminating toward the east in the region near the orogenic belt. Whereas, two offset anticlines with different trends develop at the frontal edge of the lower salt layer and the trailing edge of the upper salt layer, respectively. According to exploration results in this region, the relationship between suprasalt and subsalt structures has an influence on hydrocarbon accumulation. We believe that the connected deformation contains high-risk plays while the decoupled deformation contains well-preserved plays.     

北山北带地质构造特征

甘肃北山地区主体属塔里木板块的北缘,其内部可划分出北、中、南三个构造带.北带主体为加里东期岛弧带.北山地区于古生代经历了弧一盆体制及裂陷槽的活动大陆边缘的发展,总体上经历了前寒武纪古陆壳形成阶段、加里东期岛弧及陆缘裂陷一闭合阶段、海西期岛弧期后构造一岩浆活动及陆壳再次裂陷一闭合阶段和中、新生代差异断块升降阶段.     

棕刚玉烟尘回收的环境意义及其矿物学研究

电弧炉冶炼棕刚玉中会产生大量烟尘,如直接排放到大气中,将严重污染大气环境。为全面评估棕刚玉冶炼电炉烟尘对环境的影响,作者对贵州某厂７５００ｋＶＡ和３０００ｋＶＡ两组电炉在采用电收尘及布袋尘前后的大气环境状况进行预测计算与分析。对棕刚玉烟尘的研究表明,棕刚玉烟尘主要由Ｏ、Ａｌ、Ｓｉ、Ｋ等元素组成的玻璃态共融物球粒构成。结晶物质主要是硫酸钾、棕刚玉、褐铁矿、Ｋ２Ｓ４Ｏ６和石英。部分钾元素以硫酸钾晶体形     

塔里木盆地库车前陆褶皱带中段盐相关构造特征与油气聚集

塔里木盆地北部库车前陆褶皱带古新统一始新统发育盐岩层系，将库车前陆褶皱带构造变形和圈闭样式分为三层，即盐上构造、盐层(盐间)构造和盐下构造。盐上构造包括盐上背斜、盐上逆冲断层及断层相关褶皱、盐上背冲断块构造、强制褶皱、盐上逆冲断层遮挡构造和盐推覆构造等；盐层(盐间)构造主要包括盐枕构造、盐间断褶构造、盐焊接构造和外来盐席等；盐下构造主要有背冲断块构造、断层相关褶皱、叠瓦冲断带和双重构造等。库车前陆褶皱带盐构造的形成可能受挤压作用、重力滑动和重力扩展作用多重控制。笔者等讨论了盐相关构造油气成藏条件和模式，认为库车前陆褶皱带盐岩层变形与丰富的圈闭构造形成密切相关，烃源岩主要位于盐下，盐岩层作为优质盖层构成石油和天然气藏最优越的遮挡条件，断裂对盐下、盐间和盐上油气成藏都起重要控制作用，但盐下是最有利的油气聚集场所。     

基于网络药理学探讨荷叶抗非酒精性脂肪肝的作用机制

目的：基于网络药理学探讨荷叶抗非酒精性脂肪肝（NAFLD）的作用机制。方法：利用TCMSP平台和Swiss Target Prediction 等数据库搜集荷叶活性成分和作用靶点。通过GeneCard、GenCLiP3数据库获取NAFLD的相关靶点,利用Cytoscape 3.8.2 软件构建荷叶成分-疾病-靶点蛋白网络。使用STRING数据库和Cytoscape 3.8.2 软件构建蛋白质-蛋白质相互作用（PPI）网络,进行基因本体（GO）功能与京都基因与基因组百科全书（KEGG）通路富集分析。结果：获得荷叶活性成分15种,潜在靶点441个,疾病相关靶点1316个,成分-疾病-靶点161个。PPI网络显示,丝氨酸/苏氨酸蛋白激酶、白细胞介素6、肿瘤抑制基因 p53、血管内皮生长因子、肿瘤坏死因子等靶点与荷叶抗NAFLD的关系最密切。GO功能主要有药物的反应、凋亡过程的负调控、胞液、核浆、细胞质、线粒体酶结合、细胞因子活性、转录因子结合等。KEGG通路主要涉及乙型肝炎、癌症的途径、肿瘤坏死因子（TNF）信号通路、Toll样受体信号通路、NOD样受体信号通路、缺氧诱导因子-1信号通路等。结论：荷叶通过调控161个靶点参与TNF信号通路、Toll样受体信号通路、NOD样受体信号通路等作用于NAFLD。     

海带多因子生长模型建立研究

大型藻类在生长过程中吸收氮磷营养物质并进行光合作用,从而发挥生态修复和固定二氧化碳的重要作用。海带作为兼具经济价值和生态价值的典型大型藻类,其重要性不言而喻。本研究以海带（Saccharina japonica）为研究对象,以VENSIM可视化软件为平台,通过建立多种环境因子与海带生长的函数关系,构建海带多因子生长数学模型。结果表明,所建模型能够较好的模拟海带在不同环境条件下的生长状态。通过Morris函数计算了模型中各参数的灵敏度,分析了光照、温度和氮磷营养盐对海带生长的影响。研究发现：在海带养殖初期,受光照影响最大;在临近收获期,受高温的限制更为明显。除了养殖规模和养殖密度都比较大的海域,氮磷营养盐一般不会对海带生长产生抑制性影响,当营养盐成为限制因素时,氮营养盐的抑制性影响要大于磷。本研究所建模型可以对不同海区海带的生长状况和影响因素进行模拟和分析,从而为海带养殖海域的管理提供参考和借鉴。     

Experimental study on low temperature performance of polymer drilling mud agents

Drilling fluid additives has a major impact on rheology behavior and other performances of the drilling fluid. The key to low temperature drilling fluids is choosing antifreeze and polymer agent which have a strong ability in resisting low temperature. On the basis of determining glycol as antifreeze agent, the low-temperature-performance and capacities of anti-collapse of regular validity mud agents have been studied, the mechanism of anti-caving of the partially hydrolyzed polyacrylamide (PHPA), polypropylene potassium (KPA) and PAC-141 polymer additives have been also analyzed. A pilot study of compatibility between ethylene glycol and the polymers has educed that the polymers, ethylene glycol and inorganic salt are compatible, and they can significantly reduce the freezing point of drilling fluid. Anti-collapse ability of the drilling mud is the results of synergistic action among the agents.     

西藏班公湖—怒江构造带尼玛盆地构造性质

雅鲁藏布江洋俯冲及印度-欧亚陆陆碰撞导致了强烈的大陆岩石圈挤压变形与青藏高原的隆升。研究青藏高原内部破碎带构造-沉积演化,对理解相关变形如何向欧亚大陆腹地扩展传递至关重要。班公湖—怒江缝合带内发育一系列白垩纪—新生代陆相沉积盆地,保存了关于该时期高原内部构造-沉积演化的丰富信息。针对该类盆地的构造性质和形成机制有走滑拉分盆地、断陷盆地、前陆盆地3类不同观点。若要检定上述观点,需要开展如下工作:(1)查明盆地基底与充填建造变形特征;(2)结合构造背景探究其演化机制。鉴于此,本文对该带内尼玛盆地开展大比例尺地质填图与构造分析,结合前人成果,对盆地构造背景、构造性质和构造演化进行了探讨。主要取得了如下认识:(1)尼玛盆地基底为班公湖—怒江洋闭合形成的软碰撞缝合带内的变质岩与海相沉积岩。基底断裂为近东西走向,倾向或南或北的逆冲断裂。(2)盆地充填建造为上白垩统—新近系多旋回河湖相沉积。其变形样式主要为轴向近东西延伸的非对称褶皱,局部卷入基底断裂变形。多幕次变形自边缘向盆地中心前展式递进发展。(3)盆地可以划分为盆北掀斜隆起、南部推覆扇状隆起两处主要剥蚀物源区、中部基底断片掀斜隆起一处次要剥蚀物源区,以及北部叠瓦状压陷区与南部对冲压陷区两处主要构造沉积单元,其构造格架可以概括为“三隆夹两坳”。(4)尼玛盆地肇始于班公湖—怒江洋闭合导致的南北向地壳缩短。其后,雅鲁藏布江洋北向俯冲与印度-欧亚碰撞所致南北向挤压,导致盆地基底断裂发生周期性活动,伴有多旋回磨拉石建造与递进变形。简言之,尼玛盆地为软碰撞缝合带之上发育的山间压陷盆地。