As we all know, cyclic gas injection is one of the most effective development methods to improve condensate oil recovery. When dealing with the calculation of the reserves, the injection-production differences and wat...As we all know, cyclic gas injection is one of the most effective development methods to improve condensate oil recovery. When dealing with the calculation of the reserves, the injection-production differences and water influx create great influence on the accuracy. Based on the existing research, we proposed a new material balance equation which considered the differences of composition between produced and injected fluids and the effect of water influx, and a solution was provided in this paper. The results of the method are closer to the actual situation because they are built on the law of conservation of mass, and the using of curve fitting method can not only avoid the use of water influx coefficient but also obtain the water influx rate and reserves at the same time. The YH-23 gas condensate reservoir is taking as a typical subject to do the research, which has been exploited by cycle gas injection for 14 years. Three different methods are used to calculate the reserves, and the results show that the method proposed in this paper has minimum error of 2.96%.展开更多
隧道涌水是隧道建设及后期运营中最为常见的地质灾害,准确预测涌水量大小将为隧道设计及施工提供关键参数,因此隧道涌水量预测尤为重要。通过采用地下水动力学方法中的解析法(包括裘布依公式、古德曼公式等),结合数值模拟方法,以隧道导...隧道涌水是隧道建设及后期运营中最为常见的地质灾害,准确预测涌水量大小将为隧道设计及施工提供关键参数,因此隧道涌水量预测尤为重要。通过采用地下水动力学方法中的解析法(包括裘布依公式、古德曼公式等),结合数值模拟方法,以隧道导水断层为研究重点,对地处莲花山断裂带鸿图特长隧道典型段落(K91+634~K93+512)的最大涌水量和正常涌水量进行了预测。同时,利用已开挖段实测涌水量数值,将多种方法进行对比,分析研究各计算方法的适配性,并优化计算算法。研究表明,裘布依承压含水层公式预测与实际涌水量最为接近,鸿图特长隧道典型段落(K91+634~K93+512)的预测最大涌水量为119000 m 3/d,是极限情况下的涌水量预测,为设计施工开挖提供了可靠地水文地质参数。展开更多
The conception of "metabolic pool" is introduced and an ecosystem model consisting of sand body metabolic pool, plant metabolic pool, atmospheric pool and their corresponding channels is established. In addi...The conception of "metabolic pool" is introduced and an ecosystem model consisting of sand body metabolic pool, plant metabolic pool, atmospheric pool and their corresponding channels is established. In addition, the input and output terms of water balance including plant transpiration etc. are measured by tritiated water-tracing dynamical method, etc. and thus a water balance table is obtained. Finally, the plant water balance in the steppified desert environment of the Shapotou area at southeastern fringe of Tengger Desert in China is comprehensively analysed.展开更多
文摘As we all know, cyclic gas injection is one of the most effective development methods to improve condensate oil recovery. When dealing with the calculation of the reserves, the injection-production differences and water influx create great influence on the accuracy. Based on the existing research, we proposed a new material balance equation which considered the differences of composition between produced and injected fluids and the effect of water influx, and a solution was provided in this paper. The results of the method are closer to the actual situation because they are built on the law of conservation of mass, and the using of curve fitting method can not only avoid the use of water influx coefficient but also obtain the water influx rate and reserves at the same time. The YH-23 gas condensate reservoir is taking as a typical subject to do the research, which has been exploited by cycle gas injection for 14 years. Three different methods are used to calculate the reserves, and the results show that the method proposed in this paper has minimum error of 2.96%.
文摘隧道涌水是隧道建设及后期运营中最为常见的地质灾害,准确预测涌水量大小将为隧道设计及施工提供关键参数,因此隧道涌水量预测尤为重要。通过采用地下水动力学方法中的解析法(包括裘布依公式、古德曼公式等),结合数值模拟方法,以隧道导水断层为研究重点,对地处莲花山断裂带鸿图特长隧道典型段落(K91+634~K93+512)的最大涌水量和正常涌水量进行了预测。同时,利用已开挖段实测涌水量数值,将多种方法进行对比,分析研究各计算方法的适配性,并优化计算算法。研究表明,裘布依承压含水层公式预测与实际涌水量最为接近,鸿图特长隧道典型段落(K91+634~K93+512)的预测最大涌水量为119000 m 3/d,是极限情况下的涌水量预测,为设计施工开挖提供了可靠地水文地质参数。
基金This is a research project preferentially funded by the Lanzhou Branch of the Chinese Academy of Sciences,also a foundation subject of the Shapotou Desert Scientific Research and Experiment Station of the Lanzhou Institute of Desert Research, the Chinese
文摘The conception of "metabolic pool" is introduced and an ecosystem model consisting of sand body metabolic pool, plant metabolic pool, atmospheric pool and their corresponding channels is established. In addition, the input and output terms of water balance including plant transpiration etc. are measured by tritiated water-tracing dynamical method, etc. and thus a water balance table is obtained. Finally, the plant water balance in the steppified desert environment of the Shapotou area at southeastern fringe of Tengger Desert in China is comprehensively analysed.
