松辽盆地白垩系砂岩长石碎屑的钠长石化作用

松辽盆地白垩系砂岩以长石岩屑砂岩和岩屑长石砂岩为特征。砂岩中发育长石碎屑、岩屑等不稳定组分，而且随着埋藏深度加深（成岩作用加强）钾长石逐渐减少并最终在2700m以下消失。斜长石碎屑中钠长石组分逐渐增多，钙长石组分逐渐减少，最终形成纯钠端元的钠长石。在成岩过程中长石碎屑的钠长石化主要有3种方式：①由离子交代作用导致长石碎屑的钠长石化；②长石碎屑边缘钠长石次生生长；③与长石碎屑溶解伴生的新生钠长石作用。结合热动力学平衡原理分析，斜长石的钠长石化基本不受成岩温度和压力的制约，而钾长石的钠长石化需要较高的成岩温度和压力作用才能进行。因此，斜长石的钠长石化可见于成岩早期，而钾长石的钠长石化只发生于成岩晚期。     

裂谷盆地构造控制地形-沉积体系演化研究与面临问题

裂谷盆地早期构造作用强烈，充填作用发生在由构造控制的盆地内。盆地的古地形通过物源区侵蚀和沉积物流的盆内输送而影响沉积体的类型与堆积样式。断裂的生长、传播、相互作用、连接与死亡控制了古地形的周期演化，对沉积体系的演化施加了强烈的影响或控制。伸展盆地地层发育的控制与过程的研究主要反映在断层的生长过程、裂谷盆地的侵蚀、汇水和沉积物流等方面的精细研究。此方面研究面临的问题不仅包括研究的精细程度和技术，而且包括相关分支学科的合作。     

模糊识别方法在葡萄花油田压裂选井选层中的应用

随着油田开发时间的延长，葡萄花油田压裂增油效果逐渐变差，低效井比例增多。通过对葡萄花油田几年来近300口压裂井改造前后生产数据的统计分析，寻找压裂井增产规律，并在此基础上应用模糊识别数学模型理论指导压裂井的选井选层。实践证明，该方法简单易行，措施方案符合率高，可以做为葡萄花油田今后压裂选井选层的依据。     

利用Landsat 8和TerraSAR-X影像研究老虎沟12号冰川运动特征

采用归一化互相关算法精确配准Landsat 8影像得到了2014年—2016年不同季节冰川的运动速率,并利用其热红外波段对不同时刻的地表温度进行反演;通过强度追踪法处理TerraSAR-X影像得到了2008年4月—10月不同时段的冰川运动速率。两种数据得到的结果表明:冰川末端流速较小,中部流速增大,流速从轴部向两侧递减;冬季流速明显小于夏季,变化趋势与温度变化具有一致性。冰川西侧分支的移动速率相对较大,从Landsat 8和TerraSAR-X提取的最大速率分别为2.56 m·d~(-1)和2.74 m·d~(-1)。最后对稳定区域的冰川流速进行统计,结果显示Landsat 8提取的冰川流速精度控制在1—9 cm d~(-1),基于TerraSAR-X的强度追踪法提取移动速率的精度控制在2cm·d~(-1),验证了两种数据监测冰川移动的可靠性。     

Characteristics of remaining oil viscosity in water-and polymer-flooding reservoirs in Daqing Oilfield

The experimental analysis of 21 crude oil samples shows a good correlation between high molecular-weight hydrocarbon components (C 40+) and viscosity.Forty-four remaining oil samples extracted from oil sands of oilfield development coring wells were analyzed by high-temperature gas chromatography (HTGC),for the relative abundance of C 21-,C 21-C 40 and C 40+ hydrocarbons.The relationship between viscosity of crude oil and C 40+ (%) hydrocarbons abundance is used to expect the viscosity of remaining oil.The ...     

Structural feature and tectonic evolution of Awati——Bachu area in Tarim Basin

The research area is situated in the western part of Tarim basin, which includes Awati depression and Bachu uplifted block. It underwent three times processes of compression in a large scale and a near term extension since Cambrian. The first compression occurred during Middle Cambrian to Devonian, which formed fault band folds in NW axial direction. They were ＂under-water uplift＂ and distributed all over the research area. The second compression occurred in Late Permian and formed fault band folds and a few fault propagation folds in NS axial direction. They are developed near Tumuxiuke fault belt and the northern research area. The western anticline is bigger than the eastern one in extent and size. The third compression occurred during Palaeogene to Quaternary and formed tumuxiuke fault belt and fault propagation folds in NW direction. They are distributed over the south part of the research area. Tumuxiuke fault belt is a big scale dextral reversed strike-slip fault belt; it transformed or destroyed the fold structure of the research area. A short-term extension occurred during Early Permian. Tarim Basin is in the rift forming stage of craton, and there exist widespread basic vol- canic rocks, basic intrusive bodies and dikes.     

塔里木盆地顺北地区下古生界走滑断裂带断距分段差异与断层宽度关系

学者们对塔里木盆地顺北地区的下古生界走滑断裂带活动期次、发育时间、分段性和内部结构差异展开过一些研究,但尚未达成共识.厘清断距和断层宽度的分段差异.有助于对该地区走滑断裂展开更详细的研究.以200 m水平间距统计下古生界走滑断裂断距和断层宽度,采用线性拟合的方式落实断距与断层宽度之间的定量关系.结果表明:(1)顺北1号...     

汶川地震前后四川中坝气田的气井井口压力异常变化

分析了龙门山断裂带附近的四川中坝气田气井井口压力数据,发现汶川地震前,多口气井出现井口压力异常升降的变化.开采层深3 100 m的7口雷三储气层的气井压力,在4月8日-5月5日井压同步出现了大于35%-130%的上升;开采层深2400m的24口须二储气层的气井中,多数井压在震前出现缓慢下降的异常变化,幅度最大为45%,...     

复杂断陷盆地开发区块单砂体级高分辨率层序地层学研究——以海拉尔盆地苏31块南屯组二段为例

单砂体级高分辨率层序地层学研究对加速深化滚动勘探开发早期海拉尔盆地地质特征认识具有重要意义.运用高分辨率层序地层学原理和方法,结合钻井、测井、地震、分析化验资料,在海拉尔盆地苏31块南屯组二段识别出2个长期、4个中期、8个短期、46个超短期基准面旋回.砂体、含油砂体主要发育于LSC1下降半旋回的晚期和LSC2上升半旋回...     

A New Hadrosauriform Dinosaur from the Early Cretaceous of Gansu Province, China

A new basal hadrosauriform dinosaur, Xuwulong yueluni gen. et sp. nov., is reported based on an articulated specimen including a complete cranium, almost complete axial skeleton, and complete left pelvic girdle. The specimen is recovered from the Early Cretaceous Yujingzi Basin in the Jiuquan area, Gansu Province of northwestern China. Xuwulong is among the most basal members of hadrosauriform dinosaurs, and distinguished by its unique lower jaw in having a V-shaped rostral end of the dentary in lateral view and a mandibular articular surface which levels with mid-height of the dentary ramus, as well as an enlarged and downturned prepubic process. Including Xuwulong, three basal hadrosauriforms have been discovered from the Early Cretaceous Xinminpu Group in the Mazongshan area, making it an important area to study the origin and early evolution of duck-billed dinosaurs.