柴达木盆地大煤沟侏罗系剖面高分辨率含煤层序分析

对柴达木盆地大煤沟侏罗系剖面进行了高分辨率层序地层分析 ,并探讨了聚煤作用与高分辨率层序的关系 .在相类型、相组合和相序综合分析的基础上 ,运用高分辨率层序地层学的基本理论和方法 ,将柴达木盆地大煤沟侏罗系剖面划分为 7个中期旋回 (准层序组 )和 1 0～ 1 2个短期旋回(准层序 ) .以基准面升降为驱动机制的高分辨率层序地层学可提高地层划分精度 .它是陆相层序地层、储层对比与预测的有效手段 .煤层多聚集于上升半旋回与下降半旋回的转折期附近     

措勤盆地油气系统研究

研究措勤盆地的烃源岩、储集层、盖层和圈闭的特征 ,剖析各油气系统的发展演化历史 ,对该盆地的油气远景进行预测 .本区下白垩统川巴组的泥质岩 ,多巴组和郎山组的碳酸盐岩是有效烃源岩 ;川巴组的砂岩 ,多巴组的砂岩和碳酸盐岩以及郎山组的碳酸盐岩是主要的储集层 ;川巴组的泥质岩为局部盖层 ,多巴组和郎山组的碳酸盐岩是区域盖层 .燕山晚期运动为本区的油气聚集提供了有效的圈闭 .本区共划分了 7个油气系统 .根据盆地模拟结果综合分析表明 :措勤盆地最有利的油气区是洞错 -阿苏地区 ,该区的 K1ch- K1ch(!)油气系统是最有利的系统 ;其次是马窖 -门当日阿次地区 ,该区以 K1ch- K1ch(?)油气系统最有利 ;油气远景最差的地区是色卡错—麻米错地区     

冀中坳陷北区古近纪构造-沉积关系双向研究

从构造对沉积控制及沉积对构造响应等两个方面分析冀中坳陷古近纪构造与沉积关系 .结果表明 :1断块翘倾运动控制凹陷的沉积物源 ,控制沉积相的空间配置关系和沉积相带变化 ;2轴向倾斜运动控制沉积中心的迁移 ;3基底差异升降运动控制盆地的沉积分区 ;4水进期 ,沉积范围不断扩展 ,沉积物呈强烈的上超样式 ,显示凹陷呈现加速沉降特征 ;5水退期 ,沉积面积逐步缩小 ,沉积厚度减薄 ,沉积序列向上变粗显示基底处于减速沉降阶段 .     

长江流域洪灾探析

分析了长江流域洪灾的类型特征、水文特征、灾害特征，指出长江流域洪灾类型多样、水文特征复杂、灾害损失巨大且历时时间长；全面系统探讨了长江流域洪灾的成因，指出暴雨和河湖蓄泄洪能力不足是成灾的主要原因；阐述了应对长江流域洪灾的基本思路。     

Late Tertiary faults and their paleostress along the boundary between the Kuqa Basin and the Tianshan Mountains

Field investigation shows that the boundary between the Kuqa Basin and the Tianshan Mountains can be divided into two sections with the Yanbulak area as the dividing point. In the western section, the Mesozoic strata overlie unconformably on the Paleozoic rocks. The basin-dipping faults developed in both Mesozoic and Paleozoic rocks. The eastern section is characterized by basin-dipping normal faults separating the Paleozoic strata and Tertiary. The brittle structural analysis was carried out along the basin-range boundary. 360 measurements of striations have been obtained at a total of 25 sites. Paleostress reconstruction indicates that the basin-range boundary was in an extensional condition, with some superimposed strike-slip, during the Late Tertiary. The extension could be explained by the vertical block uplift of the Tianshan Mountains.     

Paleomagnetic result of the Cenozoic volcanic rocks from the Tuoyun Basin, southwest Tien Shan of China and its tectonic implications

In the present decades, lots of Mesozoic and Ceno-zoic paleomagnetic data have been obtained from westernChina and adjacent areas[1—19], however, these results are still not enough to reconstruct a postcollisional kinematic model for each block of the Tibetan Plateau and Central Asia. As a result, it is very difficult to paleomagnetically depict the postcollisional interaction within blocks of Ti- bet and Central Asia in detail. On the other hand, shal- lower inclinations have been repeat…     

Natural gas releasing simulation experiment of coal in process of temperature decreasing and decompression and preliminary application in Ordos Basin

Natural gas releasing simulation experiments were carried out in laboratory for researching the gas storage capacity in state of high temperature and high pressure and its gas releasing potential in process of temperature decreasing and decompression. The exiting phase state was studied through measuring gas adsorption of coal and PVT phase calculating of natural gas. Gas volume, gas molecular and isotope compositions in process of temperature decreasing and decompression were measured, natural-gas yields released from the Upper Paleozoic coal strata after later Cretaceous (K3) were calculated and the formation of the reservoir was studied combining with the geological background. The results indicate that natural gas stored in coal has still bigger releasing potential after the uplift of Upper Paleozoic strata. There exists a weak gas supply-effluent equilibrium in the reservoir of Ordos Basin, which is another possible evidence that the Upper Paleozoic gas reservoir may be a deep basin gas reservoir.     

塔北轮南地区油气成因与成藏探讨

通过对塔里木轮南地区不同层位、不同部位原油烃类化学组成的剖析 ,认为该区原油至少可分为两种不同的成因类型 ,可能存在多成藏期次 .三叠系、侏罗系原油化学组成与分布均一 ,其与轮南中西部断垒、桑塔木断垒西部奥陶系原油性质极为接近 ,以低分子量正构烷烃占优势 ,重排补身烷与重排甾烷、三环萜烷及Ts不甚发育 ,C2 3 三环萜烷为主峰 ,相对低值C2 7/C2 9甾烷等为特征 (第I类 ) ,奥陶系原油还具有中性氮化合物含量高的特征 ;以两断垒带东部石炭系、奥陶系为代表的原油以高值饱芳比、正构烷烃主峰碳后移、高含量C15 重排倍半萜与重排甾烷、低含量中性氮化合物、C2 0 三环萜烷为主峰、相对高值C2 7/C2 9甾烷、甾烷 /藿烷、Ts/ (Ts+Tm)、三环萜 /五环萜值等为特征 (第Ⅱ类 ) .轮南地区原油类型不同由主系油源不同所致 .烃类与非烃类运移指标反映奥陶系、石炭系原油具有自西而东的运移趋势 ;三叠系原油具有不太明显的由北而南的运移趋势 .烃类指标反映三叠系、侏罗系与同类型奥陶系原油间的运移分馏效应不太明显 ,其可能来自相同的烃源岩但成烃与成藏期不同     

塔里木盆地塔中地区地质热历史研究

为了解塔里木盆地以及塔中地区构造演化史 ,对塔中地区古地温梯度的变化趋势进行了研究 ,利用磷灰石裂变径迹与镜质体反射率反演计算了塔中地区 3口井的地质热历史 .结合前人研究成果 ,认为塔中地区自古生代以来古地温总体呈下降趋势 ,其间存在两个相对较高的古地温期 ,一个是寒武纪—早奥陶世 ,另一个是二叠纪 ;早古生代塔中地区古地温梯度较高 ,寒武纪—早奥陶世地温梯度为 3 .2～ 3 .5℃ / 1 0 0m ,此后地温梯度显著下降 ;石炭纪古地温略有上升 ,二叠纪时地温梯度可能达到 3℃ / 1 0 0m ;中生代古地温梯度平缓下降 ,中生代末地温梯度 2 5℃ / 1 0 0m左右 ;新生代地温梯度变化不大 ,现今地温梯度 2 2℃ / 1 0 0m左右     

塔里木盆地志留系盖层综合评价

将塔里木盆地志留系盖层的宏观与微观评价相结合 ,能更好地对盖层封油气能力进行综合评价 ,对塔里木盆地志留系下一步的油气勘探具有一定指导意义 .通过研究盖层岩石发育的沉积环境、盖层岩性、厚度分布 ,揭示了泥岩盖层平面上的延展性、连续性和稳定性 ;通过统计志留系已发现的沥青砂岩及各种油气显示分布与盖层之间的关系 ,分析了盖层对油气封堵作用的有效性 ;结合盖层样品实际突破压力测定 ,建立盖层封闭性综合评价指数与评价标准 ,对盖层的封油气能力进行了评价 .研究表明 :塔里木盆地志留系红色泥岩段和下砂岩段中亚段两套泥岩盖层具有较强的封油气能力 ,对志留系油气藏的形成与保存具有极其重要的作用