楚雄盆地含油气系统分析及勘探目标选择

楚雄盆地是在扬子板块西南大陆边缘上发育起来的晚三叠世－早白垩世前陆盆地与晚白垩世－第三纪陆内湖盆叠置的构造－沉积残留盆地。     

东营凹陷广饶海相灰岩油藏的勘探与成因机制探讨

山东东营凹陷南部的广饶油藏为一奥陶系灰岩残丘山整带含稠油的大潜山油藏,其埋藏深度为６３４．４￣１５７５．０ｍ,现已探明含油面积３０．７ｋｍ＾２。１９９０年发现一个山头含油,１９９１￣１９９３年发现多个山头含油,１９９６￣１９９７年在各山头之间的部位钻探,结果探明潜山带南部整带含油。地质和地球化学资料分析证实,该油藏不仅是今生储潜山油藏,还是烃类经基岩风化壳运移、聚集而形成的稠油油藏。形成稠油的主要     

Types of Organic Fades and Source Rock Assessment of the Coal-Measure Mudstone in the Turpan-Hami Basin

This paper discusses the enviromental characteristics of carbonaceous mudstone and mudstone (coal-measure mudstone in short) of the Early and Middle Jurassic in the Turpan-Hami basin, which were formed in swamps. Through the organic facies study of the coal-measure mudstone in this area, the authors clarify that the flowing-water swamp is the most advanced organic facies belt. Furthermore, according to the practical materials of coal-measure mudstone in the area and with the evaluation criteria of lacustrine mudstone in the past, the authors have established the integrated symbol systems from the abundance of organic matter and the type of organic matter, which can be used in the source rock evaluation of the coal-measure mudstone.     

千米桥古潜山岩溶地貌演化及古岩溶洞穴发育特征

运用印模法和残厚法以及地震相位追踪对比等古地貌分析法研究揭示,千米桥古潜山岩溶地貌的演化形成先后经历了加里东—海西暴露发育期、印支—燕山暴露改造期、喜马拉雅埋藏定形期等演化阶段。古岩溶洞穴的发育和分布不仅受地貌形态及潜水面的控制,而且与岩性组合、古水文环境及断裂构造密切相关。加里东—海西暴露期地壳的持续抬升和区域潜水面的不断下移,造成古岩溶洞穴的多旋回层状分布,孔洞多被砂泥质充填,有效孔洞保存较少;印支—燕山暴露期发育的古岩溶洞穴受断裂体系影响,分布具有一定随机性,并且多被埋藏期化学半充填,成为目前古潜山油气储层的主要储集空间。利用钻井和测井信息及洞穴充填物,可在生产现场识别古岩溶洞穴的存在及分布,为古潜山油气储层的综合评价提供依据。     

玻璃钛吸附剂的研制及其吸铀性能研究

本文报道一种机械强度高、吸铀性能较好的玻璃钛吸附剂的研制及吸铀性能研究。室内通水吸附剂回收率达99.4%,优于湿法制备的强度较好的水合氧化钛吸附剂。在铀浓度为lμg/ml时,铀的回收率平均为74.7%。铀在玻璃钛上的吸附是个吸热过程,吸附等温线显示两个平台,属分级交换模式。X射线衍射分析表明玻璃钛主要为无定形成分。     

包裹体类型和成分特征在油气运移研究和油气储层评价中的应用——以赤水气田为例

包裹体类型和成分的不同,反映了油气的不同演化程度和不同运移期次。赤水地区二叠系、三叠系储层中有各种盐水包裹体和烃类包裹体。论述了不同世代胶结物中包裹体的类型特征和成分特征,及它们的划分标志。依据单个包裹体激光拉曼光谱测定数据,得出常规的包裹体中“甲烷基本浓度”,以及本次提出的甲烷/总有机组分含量比值和烷烃/总有机组分含量比值,并由此分析油气运移特征和进行储层评价。分析认为,在同一块岩样中,若存在两种以上明显的不同演化程度、不同有机组分的多种类型包裹体,则说明本区具有两次以上的油气运移。有利的油气储集层段应有较多的油气初次运移和二次运移的烃包裹体,尤其应有反映油气最终演化的有机组分标志。     

Inter-decadal Variability of the East Asian Summer Monsoon and Its Impact on Hydrologic Variables in the Haihe River Basin,China

Wavelet analysis and Mann-Kendall tests are employed to evaluate the variation in the East Asian summer monsoon (EASM) and hydrological variables in the Haihe River basin calculated by the Variable Infiltration Capacity model. The relationships between those variables and the EASM are also examined. The results indicate consistent 40a periodic variation in both the hydrological variables and the EASM. The hydrologic variables show downward trends in the Haihe River basin over the past 60 years, especially in piedmont regions of the Taihang-Yan Mountains. The variables are closely related to the EASM, whose continuous weakening since the 1970 s has resulted in prolonged drought and severe water shortages in the basin. The periodicity of the EASM index was analyzed using continuous wavelet transform methods. We found the most significant periodic signal of the EASM is ~80 years; therefore, the EASM may reinforce and reach a maximum in the 2040 s, resulting in more precipitation and other impacts on basin water resources. Hydrologic variables in the basin in the 2040 s are predicted, and their spatial distributions in the Haihe River basin are also discussed. These results allow for the estimation of water resources under forecasted EASM, which will be useful for water resources management in the Haihe River basin.     

Formation Laws of Inorganic Gas Pools in the Northern Jiangsu Basin

In the Northern Jiangsu basin there are high pure CO2 gas pools, low condensed oil-containing CO2 gas pools, high condensed oil-containing CO2 gas pools and He-containing natural gas pools, with the δ13Cco2 (PDB) values ranging from -2.87‰ to -6.50‰, 3He/4He 3.71×10-6 to 6.42×10-6, R/Ra 2.64 to 4.5, 40Ar/36Ar 705 to 734, belonging to typical mantle source inorganic gas pools which are related to young magmatic activity. The gas layers occur in two major reservoir-caprock systems, the terrestrial Meso-Cenozoic clastic rock system and the marine Meso-Palaeozoic carbonate rock-clastic rock system. Controlled by the difference in the scale of traps in the two reservoir-caprock systems, large and medium-scale inorganic gas pools are formed in the marine Meso-Palaeozoic Group and only small ones are formed in the terrestrial Meso-Cenozoic strata. Inorganic gas pools in this basin are distributed along the two deep lithospheric faults on the west and south boundaries of the basin. Gas pools are developed     

改进的Shepard算法及其在重力异常插值中的应用

基于Shepard插值模型的基本原理,从权函数的构造和采样点的选取两个方面对Shepard函数逼近模型和算法实现进行了改进。新模型的权函数具有更高的光滑度和更好的衰减性并且其光滑性和衰减性可以根据需要自由调节。改进后的算法插值精度更高且实现简单、便于应用,弥补了传统插值算法的不足。通过对实测重力场数据的插值试验,运用本文改进的算法可使插值误差统计特征多项指标均有一定的提高。     

石羊河流域土地类型的初步研究

本文把石羊河流域看作一个完整的生态整体。从地形、地表组成物质、海拔高度、人类经济活动等方面探讨了土地的分异因素,同时按照综合性原则、主导因素原则、联系生产原则等划分了12个第一级土地类(相当于"土地系统"、"地方"),61个第二级土地型(相当于"土地单元"、"限区")。最后,就就第一级土地类的基本特征和利用方面进行了讨论。