徐州市张集水源地裂隙岩溶水群孔抽水试验研究   总被引：1，自引：0，他引：1       下载免费PDF全文

钱家忠  吴剑锋  朱学愚  董洪信  李根义 《水科学进展》2003,14(5):598-601

基于徐州市张集水源地详勘阶段任务要求以及张集水源地具体的水文地质条件,提出了张集水源地裂隙岩溶水群孔干扰抽水试验的技术要求和工作方法。试验结果表明,根据该技术要求和工作方法所进行的抽水试验既满足了为水源地地下水资源评价而进行的数值计算要求,又适合农村电网及水井实际,并且节约了经费。结论对裂隙岩溶水大型水源地地下水资源评价与科学管理具有重要的参考价值。  相似文献   

低渗透储层水平井-直井联合布井极限注采井距研究     

侯晓春 陆程蔡文  郑兴范 《现代地质》2008,22(1):91-96

低渗透储层水平井-直井联合布井技术具有广泛的应用前景,其布井方式至关重要。首先利用劈分流场的方法直观地给出常规储层水平井-直井联合布井的产能评价方法;然后针对低渗透储层的渗流特点,在考虑启动压力梯度条件下建立新的井网渗流物理模型并求解得到产能评价公式;最后经分析计算给出启动压力梯度影响的面积井网极限注采井距关系曲线。研究结果为低渗透储层部署水平井-直井联合井网提供理论依据。  相似文献   

Optimal pumping from skimming wells from the Yamuna River flood plain in north India     

S. V. N. Rao  Sudhir Kumar  Shashank Shekhar  S. K. Sinha  S. Manju 《Hydrogeology Journal》2007,15(6):1157-1167

This report examines the problem involving the pumping of groundwater from a group of 90 existing wells along the banks of the Yamuna River, northwest of Delhi (India), underlain with geologically occurring saline water. It is known that unregulated pumping will lead to upconing of saline water and therefore it is necessary to determine optimal rates and associated well locations (from an existing group of candidate wells that supply drinking water to the city of Delhi) that will minimize the total salinity. The nonlinear, non-convex problem is solved by embedding the calibrated groundwater model within a simulation-optimisation (S/O) framework. Optimisation is accomplished by using simulated annealing (SA), a search algorithm. The computational burden is primarily managed by replacing the numerical model with a surrogate simulator-artificial neural network (ANN). The model is applied to the real system to determine the optimal pumping schedule. The results of the operational model suggest that the skimming wells must be operated from optimal locations such that they are staggered in space and time to obtain the least saline water.  相似文献   

Diagnosis of trace Pb in domestic wells,Upper Gloucester Catchment,Maine, USA     

W. C. Sidle 《Environmental Geology》2007,52(1):51-62

Dissolved Pb in 32 wells associated with corroding submersible pumps is examined within a rural water district after almost 20 years (1984–2002). Groundwater Pb ranged from 0.4–24.9 μg L⁻¹ after 24 h pump flushing. Preliminary geochemistry and representative borehole lithology examinations were extrapolated by Markov chain modeling. The first-order geostatistical realizations of glacial sediments coupled with the Monte Carlo Metropolis-Hasting method suggest that elevated trace Pb persists in sand and gravel units, and continues at least to 40 m depth in the catchment. The ²⁰⁷Pb/²⁰⁶Pb and ²⁰⁸Pb/²⁰⁶Pb isotope compositions of groundwater Pb were decisive in discriminating the importance of leached Pb from submersible pump materials among geogenic sources.  相似文献   

水源热泵抽灌井布局及其运行过程中地下温度变化   总被引：3，自引：1，他引：3  

刘立才  王理许  丁跃元  王金生 《水文地质工程地质》2007,34(6):1-5

本文以某水源热泵空调系统为例,建立了抽灌场地及周边地下水动力场与温度场的耦合数学模型,运用数值法求得系统运行过程中地下水的温度变化,分析了场地"热短路"效应和不同含水层中温度场的影响范围,以定量化的手段科学评价了场地抽灌井的布局及其可行性。分析结果表明,由于抽灌井之间的"热短路"程度较轻,场地的抽灌井布局可保证系统的高效运行。  相似文献   

Real-time reservoir management: A multiscale adaptive optimization and control approach     

L. Saputelli  M. Nikolaou  M. J. Economides 《Computational Geosciences》2006,10(1):61-96

We propose a decision-making approach for optimizing the profitability of hydrocarbon reservoirs. The proposed approach addresses the overwhelming complexity of the overall optimization problem by suggesting an oilfield operations hierarchy that entails different time scales. We discuss system identification, optimization, and control that are appropriate at various levels of the hierarchy and capitalize on the abilities of permanently instrumented and remotely actuated fields. Optimization is performed in real-time and is based on feedback. We provide details on real-time identification of hybrid models and their use at the scheduling and supervisory control levels. Case studies using field-calibrated simulation data demonstrate the applicability and value of the proposed approach. Directions for future development are given.  相似文献   

塔里木盆地顺北区块二叠系井漏复杂的分析及对策          下载免费PDF全文

董小虎  李银婷 《探矿工程》2020,47(2):59-62

顺北区块钻井项目施工中，二叠系的井漏复杂情况较多，漏失量大，易发生再次或多次漏失，严重时导致井壁垮塌掉块卡钻，致使井下复杂情况高发，给钻井工程带来损失，影响了该区块的勘探开发速度。二叠系火成岩发育，地层裂缝发育，地层破裂，钻井时井下复杂主要表现为漏失。针对此问题开展了顺北地区二叠系井漏复杂分析，结合顺北区块施工项目的实际情况以及二叠系地层特点，分析了该区块的二叠系钻进难点，总结了随钻堵漏技术具体的施工措施和不同漏速下的堵漏方案.经过实践验证，该综合防漏堵漏对策能有效减少井漏复杂，提高堵漏效率。  相似文献   

水泥浆失重对高压油气井固井质量的影响分析及工艺对策          下载免费PDF全文

秦国宏  覃毅  尤凤堂  程春红  李沧波  吴成坤 《探矿工程》2015,42(3):33-36

高压油气井由于存在高压地层,在整个钻井工程中都引起了高度重视。有些高压油气井可能还存在低压易漏层。在固井候凝过程中,水泥浆会产生失重,进而降低了井筒内的液柱压力,如果液柱压力低于失重井段的地层压力,地层流体将会向环空侵入,造成窜槽,甚至会引发井控事故;如果液柱压力高于地层（破裂）压力将引起地层漏失,进而污染油气层,造成水泥浆低返。因此,处理好固井过程中井筒内动态压力和地层压力的关系以及制定相关的应急措施是高压油气井固井成败的关键。分析了水泥浆失重对高压油气井固井质量的影响因素,提出了高压油气井油气水侵的预防措施和固井中相关风险的应急措施和机制。  相似文献   

辽河油田欢喜岭沙河街组沙四段精细地层划分与对比          下载免费PDF全文

张彬  单敬福  吴东胜  汤乃千  闫海利 《地质找矿论丛》2015,30(4):548-553

文章在通过综合研究辽河油田欢喜岭X区地震、测井、岩性等资料基础上,采用"井震结合"的方法对区内能够钻到沙四段的113口井的岩性、电性进行分析,对欢喜岭区内的沙河街组沙四段进行了精细化分与对比,并将沙四段地层划分为Te(特岩)、DuⅠ(杜Ⅰ)、DuⅡ(杜Ⅱ)、DuⅢ(杜Ⅲ)4套小层。沙四段的精细地层划分与对比,为研究砂体展布、沉积微相等提供了地质基础数据,对油田的开发具有一定的指导意义。  相似文献   

创新土地储备机制 助力低效用地再开发     

姚思芸 《国土资源情报》2014,(5):39-42

土地储备机制的建立对调控土地市场、提高土地资源合理配置、增加政府财政收入等方面发挥了重要作用。在当前各地大力推进低效用地再开发的形势下,通过对嘉兴市实地调研,分析土地储备机制的优势、面临的机遇和挑战,探讨如何通过拓展土地收购储备方式、创新土地储备机制来深化土地储备制度,更有效地解决低效用地再开发中的难点和问题,确保低效用地再开发依规、有序地推进。  相似文献