A general method has been developed for analyzing pressure buildup data from a well located in a system with both production and injection wells in a closed, bounded two-phase flow reservoir. The proposed method enabl...A general method has been developed for analyzing pressure buildup data from a well located in a system with both production and injection wells in a closed, bounded two-phase flow reservoir. The proposed method enables one to calculate the total mobility or permeability-thickness product, the skin factor, the average drainage-area pressure and the injection-production ratio （at the instant of shut-in） with accuracy from pressure buildup （or falloff） data dominated by a linear trend of reservoir pressure. Out of thousands of well tests, several typical field examples have been presented to illustrate the application of the proposed method for analyzing pressure transient data from a well located in a water-injection multiwell reservoir. And the possible application of this method to heterogeneous systems such as naturally fractured reservoirs is also discussed. Approaches to aid practicing engineers in verifying the buildup interpretation （or recognizing the interference of offset wells） are presented. Extension of the presented method to a gas well located in a multiwell gas reservoir is also suggested展开更多
Ye Shu-xian＇s proposal of ＂Road of Jade＂ brings forward a new way to study the origin of civilization. Jade replaced bronze as one of the major criterions of the birth of civilizations. Ye explains jade as a mystic...Ye Shu-xian＇s proposal of ＂Road of Jade＂ brings forward a new way to study the origin of civilization. Jade replaced bronze as one of the major criterions of the birth of civilizations. Ye explains jade as a mystical witchcraft which has a sacred power for the ancient people. Because the jade is produced in the water, and has the similar color with the sky, both of which have significance for the origin of life, jade is thus considered to be the origin of power. The notion of jade-god gave birth to the civilization in ancient China and triggered competition among the settlements, which in turn, advanced the development of civilization.展开更多
Coals are carbon-rich materials with excellent aromatic nature and macro- molecular structure. They pose great potential as the source of organic chemical feed- stock and high value-added carbonaceous materials in the...Coals are carbon-rich materials with excellent aromatic nature and macro- molecular structure. They pose great potential as the source of organic chemical feed- stock and high value-added carbonaceous materials in the 21st century. As some of the most important analytical methods, thermal analysis (TA) techniques with strong com- petence in materials characterization and reaction mechanism research, have been ex- tensively employed to accumulate the knowledge about coal conversion and utilization in a most effective, efficient and responsible way. Unfortunately, some efforts did not promote the sound growth of a systematic discipline, which might arise from the intrinsic drawback of conventional TA. Proposals on acquiring much more reliable understanding of the mechanism and kinetics of reactions were made in this review.展开更多
Hydrodynamic analysis is one of the key steps in safety assessment ot a structure m waves, lvlany optloll~ axe available for answering challenge raised from marine and offshore energy industry, from costly three dimen...Hydrodynamic analysis is one of the key steps in safety assessment ot a structure m waves, lvlany optloll~ axe available for answering challenge raised from marine and offshore energy industry, from costly three dimensional CFD to the efficient but not perfect boundary element models. Focus on the boundary element methods, analysis methods for the interaction of waves and structures are discussed. Those boundary element models cover frequency domain and time domain, linear and non-linear. Special attention is pay to the problems encountered in those models and approaches we adopted for their engineering solution.展开更多
文摘A general method has been developed for analyzing pressure buildup data from a well located in a system with both production and injection wells in a closed, bounded two-phase flow reservoir. The proposed method enables one to calculate the total mobility or permeability-thickness product, the skin factor, the average drainage-area pressure and the injection-production ratio （at the instant of shut-in） with accuracy from pressure buildup （or falloff） data dominated by a linear trend of reservoir pressure. Out of thousands of well tests, several typical field examples have been presented to illustrate the application of the proposed method for analyzing pressure transient data from a well located in a water-injection multiwell reservoir. And the possible application of this method to heterogeneous systems such as naturally fractured reservoirs is also discussed. Approaches to aid practicing engineers in verifying the buildup interpretation （or recognizing the interference of offset wells） are presented. Extension of the presented method to a gas well located in a multiwell gas reservoir is also suggested
基金This paper is supported by General Financial Grant from the China Postdoctoral Science Foundation （Grant No.： 2013M542363）.
文摘Ye Shu-xian＇s proposal of ＂Road of Jade＂ brings forward a new way to study the origin of civilization. Jade replaced bronze as one of the major criterions of the birth of civilizations. Ye explains jade as a mystical witchcraft which has a sacred power for the ancient people. Because the jade is produced in the water, and has the similar color with the sky, both of which have significance for the origin of life, jade is thus considered to be the origin of power. The notion of jade-god gave birth to the civilization in ancient China and triggered competition among the settlements, which in turn, advanced the development of civilization.
文摘Coals are carbon-rich materials with excellent aromatic nature and macro- molecular structure. They pose great potential as the source of organic chemical feed- stock and high value-added carbonaceous materials in the 21st century. As some of the most important analytical methods, thermal analysis (TA) techniques with strong com- petence in materials characterization and reaction mechanism research, have been ex- tensively employed to accumulate the knowledge about coal conversion and utilization in a most effective, efficient and responsible way. Unfortunately, some efforts did not promote the sound growth of a systematic discipline, which might arise from the intrinsic drawback of conventional TA. Proposals on acquiring much more reliable understanding of the mechanism and kinetics of reactions were made in this review.
文摘Hydrodynamic analysis is one of the key steps in safety assessment ot a structure m waves, lvlany optloll~ axe available for answering challenge raised from marine and offshore energy industry, from costly three dimensional CFD to the efficient but not perfect boundary element models. Focus on the boundary element methods, analysis methods for the interaction of waves and structures are discussed. Those boundary element models cover frequency domain and time domain, linear and non-linear. Special attention is pay to the problems encountered in those models and approaches we adopted for their engineering solution.
