Based on the cores from 47 wells and logging data of 130 wells,the main types of sand bodies in the shallow water delta of the Chang 8_(2) sub-member in the Triassic Yanchang Formation,Longdong Area,Ordos Basin were c...Based on the cores from 47 wells and logging data of 130 wells,the main types of sand bodies in the shallow water delta of the Chang 8_(2) sub-member in the Triassic Yanchang Formation,Longdong Area,Ordos Basin were comprehensively analyzed,the distribution characteristics of sand bodies more than 20 m thick were identified,and the genetic types of the thick sand bodies were sorted out.In this region,thick-bed sand bodies can be divided into two types according to the shape and position:type 1 is the sand body in wide strip and is distributed between the average high water mark and the average low water mark;type 2 is distributed on both sides of the average low water mark and is in irregular lump shape.Based on the principle of the volume distribution of sediments and the change rule of accommodation space,the genetic models of two types of thick-bed sand bodies in the Chang 8_(2) sub-member are superimposed distributary channel sand bodies in high accommodation space and superimposed composite sand bodies in low accommodation space.展开更多
Groundwater is important drinking water source in Longdong area. In recent years,as gradual expanding of industrial and agricultural production scales,seen from change trend of water quality,major impact factors of gr...Groundwater is important drinking water source in Longdong area. In recent years,as gradual expanding of industrial and agricultural production scales,seen from change trend of water quality,major impact factors of groundwater in the zone were ammonia nitrogen,COD,sulfate and total dissolved solid. By using specific thought of parameter system method,vulnerability assessment factor system of groundwater and meter point system calculation model in the zone were established. Via calculation and analysis,vulnerability distribution of groundwater in the zone was obtained. According to vulnerability index（ higher,moderate and lower）,zone dividing was conducted,and the areas were respectively 623. 25,4 005. 00 and 6 621. 75 km2,which respectively accounted for 5.54%,35. 60% and 58. 86%. The evaluation provided research basis for prevention,control and protection of groundwater environment in Longdong area.展开更多
With the ongoing development of the apple industry in the Longdong region of Gansu,this sector has emerged as a key driver for the government s initiatives aimed at increasing stable income for local residents and pro...With the ongoing development of the apple industry in the Longdong region of Gansu,this sector has emerged as a key driver for the government s initiatives aimed at increasing stable income for local residents and promoting rural revitalization.The Longdong region boasts a favorable geographical location and a suitable climatic environment,making it an ideal area for apple cultivation.This paper analyzes meteorological data from the national meteorological observatory in Longdong over the past forty years,focusing on average temperature,precipitation,sunshine duration,and relative humidity during three critical growth periods of apples.The research reveals significant differences in the distribution of meteorological conditions across these key growth stages.Notably,the average temperature is higher in the central and northern parts of the region,while lower temperatures are observed in the southwestern areas.The average daily maximum temperature tends to be higher in the northwest and lower in the central and southwestern regions.Conversely,the average daily minimum temperature demonstrates a distinct pattern,being higher in the south and lower in the north.Additionally,precipitation is more abundant in the southeast and less so in the northwest.Sunshine hours are greater in the northern and central regions,while the southwestern and northeastern areas receive fewer hours of sunlight.Finally,relative humidity is higher in the south and lower in the north.展开更多
【目的】近年来,鄂尔多斯盆地陇东地区太原组含铝岩系的天然气勘探取得重大突破。然而,受传统光学显微镜的制约,含铝岩系的矿物学研究仍较为薄弱。【方法】本文使用全自动矿物分析系统TIMA(TESCAN Integrated Mineral Analyzer),结合薄...【目的】近年来,鄂尔多斯盆地陇东地区太原组含铝岩系的天然气勘探取得重大突破。然而,受传统光学显微镜的制约,含铝岩系的矿物学研究仍较为薄弱。【方法】本文使用全自动矿物分析系统TIMA(TESCAN Integrated Mineral Analyzer),结合薄片观察等手段,研究含铝岩系的矿物学特征,查明矿物组成及其赋存状态,详细测定矿物的种类、含量,并讨论其成因、总结矿物演化序列。【结果】该地区含铝岩系的主要矿物成分包括硬水铝石、菱铁矿、黄铁矿、伊利石、高岭石、鲕绿泥石等。伊利石主要是流体蚀变的产物,早期沉积高岭石为风化过程的产物,晚期成岩高岭石由后期硬水铝石硅化而成。锐钛矿和硬水铝石同期结晶,并形成于还原环境。早期的鲕绿泥石形成于喀斯特环境,并经过一段距离的运移到达成矿场所,晚期的鲕绿泥石形成与菱铁矿溶蚀有关。该地区含铝岩系中矿物形成于地表风化期、成矿期、后生期等三个阶段。【结论】对于含铝岩系这类矿物组成复杂、晶粒细小光学显微镜不易观察的样品,基于扫描电镜和能谱分析的TIMA能够快速、有效地识别含铝岩系的矿物组成,获取矿物含量和元素信息,并查明不同矿物之间共生、连生和包裹关系。展开更多
基金Supported by the National Basic Research Program of China (973 Program)(2014CB239000)China Petroleum Scientific Research and Technology Development Project (YJXK2019-16)。
文摘Based on the cores from 47 wells and logging data of 130 wells,the main types of sand bodies in the shallow water delta of the Chang 8_(2) sub-member in the Triassic Yanchang Formation,Longdong Area,Ordos Basin were comprehensively analyzed,the distribution characteristics of sand bodies more than 20 m thick were identified,and the genetic types of the thick sand bodies were sorted out.In this region,thick-bed sand bodies can be divided into two types according to the shape and position:type 1 is the sand body in wide strip and is distributed between the average high water mark and the average low water mark;type 2 is distributed on both sides of the average low water mark and is in irregular lump shape.Based on the principle of the volume distribution of sediments and the change rule of accommodation space,the genetic models of two types of thick-bed sand bodies in the Chang 8_(2) sub-member are superimposed distributary channel sand bodies in high accommodation space and superimposed composite sand bodies in low accommodation space.
文摘Groundwater is important drinking water source in Longdong area. In recent years,as gradual expanding of industrial and agricultural production scales,seen from change trend of water quality,major impact factors of groundwater in the zone were ammonia nitrogen,COD,sulfate and total dissolved solid. By using specific thought of parameter system method,vulnerability assessment factor system of groundwater and meter point system calculation model in the zone were established. Via calculation and analysis,vulnerability distribution of groundwater in the zone was obtained. According to vulnerability index（ higher,moderate and lower）,zone dividing was conducted,and the areas were respectively 623. 25,4 005. 00 and 6 621. 75 km2,which respectively accounted for 5.54%,35. 60% and 58. 86%. The evaluation provided research basis for prevention,control and protection of groundwater environment in Longdong area.
文摘With the ongoing development of the apple industry in the Longdong region of Gansu,this sector has emerged as a key driver for the government s initiatives aimed at increasing stable income for local residents and promoting rural revitalization.The Longdong region boasts a favorable geographical location and a suitable climatic environment,making it an ideal area for apple cultivation.This paper analyzes meteorological data from the national meteorological observatory in Longdong over the past forty years,focusing on average temperature,precipitation,sunshine duration,and relative humidity during three critical growth periods of apples.The research reveals significant differences in the distribution of meteorological conditions across these key growth stages.Notably,the average temperature is higher in the central and northern parts of the region,while lower temperatures are observed in the southwestern areas.The average daily maximum temperature tends to be higher in the northwest and lower in the central and southwestern regions.Conversely,the average daily minimum temperature demonstrates a distinct pattern,being higher in the south and lower in the north.Additionally,precipitation is more abundant in the southeast and less so in the northwest.Sunshine hours are greater in the northern and central regions,while the southwestern and northeastern areas receive fewer hours of sunlight.Finally,relative humidity is higher in the south and lower in the north.
文摘【目的】近年来,鄂尔多斯盆地陇东地区太原组含铝岩系的天然气勘探取得重大突破。然而,受传统光学显微镜的制约,含铝岩系的矿物学研究仍较为薄弱。【方法】本文使用全自动矿物分析系统TIMA(TESCAN Integrated Mineral Analyzer),结合薄片观察等手段,研究含铝岩系的矿物学特征,查明矿物组成及其赋存状态,详细测定矿物的种类、含量,并讨论其成因、总结矿物演化序列。【结果】该地区含铝岩系的主要矿物成分包括硬水铝石、菱铁矿、黄铁矿、伊利石、高岭石、鲕绿泥石等。伊利石主要是流体蚀变的产物,早期沉积高岭石为风化过程的产物,晚期成岩高岭石由后期硬水铝石硅化而成。锐钛矿和硬水铝石同期结晶,并形成于还原环境。早期的鲕绿泥石形成于喀斯特环境,并经过一段距离的运移到达成矿场所,晚期的鲕绿泥石形成与菱铁矿溶蚀有关。该地区含铝岩系中矿物形成于地表风化期、成矿期、后生期等三个阶段。【结论】对于含铝岩系这类矿物组成复杂、晶粒细小光学显微镜不易观察的样品,基于扫描电镜和能谱分析的TIMA能够快速、有效地识别含铝岩系的矿物组成,获取矿物含量和元素信息,并查明不同矿物之间共生、连生和包裹关系。
