Application of BP Neural Network Model in Fracturing Productivity Prediction of Fuyu Tight Oil Reservoir in Jilin Oilfield     

JI Tianliang  LU Shuangfang  TANG Mingming  WANG Min  WANG Wenguang  LIANG Hongru  MIN Chunjia 《《地质学报》英文版》2015,89(Z1):154-155

<正>1 Introduction Oil resources in tight reservoirs are widely distributed in China.Tight oil reservoirs have been discovered in Songliao Basin,Bohai Bay,Qaidam Basin,Tuha Basin,Sichuan Basin,etc.However,such oil reservoirs have poor physical properties.Conventional vertical wells are hard to bring about economic benefits,and the horizontal well  相似文献   

ＣＬＭ３０对中国区域陆面过程的模拟试验及评估（Ⅱ）：土壤湿度   总被引：5，自引：0，他引：5  

熊明明  陈海山  俞淼 《气象科学》2011,31(1):1-10

利用CLM3.0及普林斯顿大学的全球大气外强迫场资料,对中国地区1948—2001年的土壤湿度进行了off-line模拟,进一步评估了CLM3.0对中国地区土壤湿度的模拟能力。结果表明:模式基本能揭示土壤湿度的空间分布型,即华北干、东北和东南湿二湿一干的分布特征,但模拟值较观测值普遍偏高;就年际变化而言,在5个分区中,云贵地区模拟的年际变化与观测的相关性最好,东北区域次之,模拟的东部中纬度区域的年际变化较差,全区范围内7月的模拟好于4月;模式对于土壤湿度倾向有一定程度的模拟能力,基本能模拟出4月东北东部区域的干化趋势,但模式模拟的变化幅度较观测值偏小很多,其中以黄淮江淮地区模拟的趋势最差。  相似文献   

利用瑞雷面波反演华北克拉通东北部边界的岩石圈结构   总被引：4，自引：0，他引：4       下载免费PDF全文

李明明  何玉梅 《地震学报》2011,33(2):143-155

运用瑞雷面波相速度频散曲线分析和反演得到了华北克拉通东北部边界及其邻近区域岩石圈的精细S波速度结构.利用11个地震事件、60个台站的瑞雷面波波形资料,得到了周期从25-150 S的相速度频散曲线,并且通过线性反演方法得到了深度从40-300 km的S波速度结构.结果表明,该研究区域S波速度存在强烈的不均匀性.从东南部的...  相似文献   

Water geochemical characteristic variations in and around a karst-dominated natural reserve area,southwestern China     

Mingming Jing  Wei Chen  Tingting Zheng  Yuan Liao  Julia Ellis Burnet  Min Xu  Chen Yang  Lina Shen  Mingzhong Liang 《Environmental Earth Sciences》2011,64(4):1051-1058

This paper reports original data on the physical and chemical parameters of precipitation, river water and groundwater in and around the Longhushan Nature Reserve Area, located in southwestern China karst region, and provides a preliminary characterization of the hydrogeochemical process governing the natural water evolution in this area. The rainfall and river water mainly pertain to the HCO₃ ⁻–Ca²⁺ type and groundwater mainly pertain to the HCO₃ ⁻–Ca²⁺ + Mg²⁺ type. The HCO₃ ⁻ was the predominant anion and Ca²⁺ was the predominant cation in all waters, respectively. The Gibbs Boomerang Envelop model, the 1:1 relationship of Na⁺ plus K⁺ versus Cl⁻ as well as the 1:1 relationship of Ca²⁺ plus Mg²⁺ versus HCO₃ ⁻ all suggested geochemical weathering is the main controlling factor for the geochemical compositions of this natural water. In surface water, the Mg²⁺/Ca²⁺ ratios ranged from 0.32 to 0.42 and the Na⁺/Ca²⁺ varied between 0.04 and 0.05. In the groundwater, the Mg²⁺/Ca²⁺ ratios varied from 0.37 to 0.62 and were below the ideal ratio of 0.8. These ratios showed the presence of a dolomite source. Analysis of trace elements showed that As, B, Pb, Se, Sr, V and Zn elements were abundant in the natural water during summer in this region.  相似文献   

即墨市耕地后备资源调查的做法及建议     

张明明  毕翠红 《山东国土资源》2011,27(5):46-48,51

根据山东省第二次土地调查实施方案的要求,即墨市在全市范围内开展了耕地后备资源调查工作,查清耕地后备资源的类型、数量、质量和分布情况,该文介绍了即墨市耕地后备资源调查的组织实施,技术依据,适宜性评价及其成果,并对存在的问题提出合理化建议。  相似文献   

Treatment of oily sludge by advanced oxidation process     

Guolin Jing  Mingming Luan  Wenting Du  Chunjie Han 《Environmental Earth Sciences》2012,67(8):2217-2221

For treating oily sludge, wet peroxide oxidation (WPO) and catalytic wet oxidation (CWO) were investigated. The CWO experiment was carried out in a 0.5?L batch reactor using FeCl₃ as catalyst. By using WPO, the effects of reaction parameters such as residence time, temperature, H₂O₂ excess, and initial COD were investigated. The results demonstrated that >80?% chemical oxygen demand (COD) was removed by CWO and >90?% COD was removed by WPO. Significantly, more of COD could be removed from the oily sludge by adding H₂O₂ in small doses. In conclusion, WPO was much more effective in the removal of organic compounds from oily sludge.  相似文献   

山东省煤成气资源现状及开发利用前景     

陈平  姜明丽  孙明明  张心彬 《山东国土资源》2006,22(8):51-54

概述了山东省煤成气的分布特点及造成煤成气含量较低的主要地质因素,重点对煤成气含量较高的黄河北煤成气预测区、淄博煤田煤成气预测区、章丘煤田煤成气预测区、阳谷-鄄城-曹县一带的煤成气预测区进行了分析,提出了山东省今后煤成气开发的地区和方向。  相似文献   

The relationship between cyanobacteria and environmental factors in the Bering Sea     

肖天  孙松  张武昌  李超伦  金明明 《极地研究(英文版)》2002,13(2)

During the first Chinese Scientific Expedition to the Arctic in July - September 1999, cyanobacteria in the Bering Sea were measured by epifluorescence microscopy. Cyanobacterial abundance varied from 0 to 7. 93 × 103 cell/ml and decreased along a northerly directed latitudinal gradient in horizontal distribution. Cyanobacteria did not occur at station Bl - 12 (north of 60 °N). Vertically, high cya-nobacterial abundance appeared in the upper 25 - 50 m and decreased rapidly below 50 m. There were no cyanobacteria at the 150 m. Seawater temperature and NH4+ -N are suggested to affect the distribution of cyanobacteria.  相似文献   

Vertical properties of nutrients and oxygen under tempeuature-salinity structure of the Bering Basin in July 1999     

金明明 《极地研究(英文版)》2002,13(2)

The China R/V Xuelong went on the first Arctic scientific cruise, and we obtained 271 hydro-chemical samples from 22 deep-sea stations in the Bering Basin in late July, 1999. Here we describe vertical properties of silicate [Si] , dissolved inorganic nitrogen [DIN] or [N] (nitrate plus ammonium plus nitrite) , phosphate [P] and oxygen [ O2 ] in seawater under potential temperature-salinity structure. The seasonal stratification in the summer and the water exchanges of the North Pacific Ocean over the Bering Basin resulted in that the four layers of vertical structure with two thermoclines may be found. Vertical [Si] and [N] and [P] profiles show that the nutrients are consumed mainly in ≤50 m and the order of deficient nutrients is [Si] the first, [N] the second and [P] the third. The [N] and [P] increase with depth downward to about 500 m and then both decrease, but the [Si] increases from 150 m to 2000 m or the bottom. In ≥ 150 m the [ O2 ] decreases, which is related with both [P] and [N] increasin  相似文献   

低碳约束下中国物流业效率的空间演化及影响因素   总被引：1，自引：1，他引：0  

刘承良  管明明 《地理科学》2017,37(12):1805-1814

以交通运输、仓储和邮政业表征物流业,引入SBM-Undesirable模型,考虑低碳约束下的物流效率,对中国（除港澳台和西藏）的30个省（市、自治区）2003~2014年物流业效率进行测度,基于格局-过程-机理框架系统揭示了低碳约束下物流业效率的空间演化特征及其影响因素：① 低碳约束下物流业效率总体偏低,空间分异呈现出东部>中部>西部的地带性分异态势。② 空间分布具有一定地方依赖性,效率高值区集中于东部沿海,呈现由“大集中、小分散”向“条带状集聚”变化的特征,而低值区高度锁定于西北和西南半壁。③ 空间集聚性较弱,不断趋于收敛,高效率集聚区表现出“北扩西移”的演化趋势。④ 物流业高效率区与高产值区呈现显著的空间同配性。⑤ 物流业效率的空间演化受多种因素综合作用,经济发展、市场环境、产业集聚、信息化水平、政府调控对物流业效率具有显著的正向影响,能源强度则具有负向影响,而对外开放程度、环境规制对物流业效率的提升作用不明显,研究结果可为区域物流协调发展、提高物流业效率提供参考。  相似文献