This is a brief review of alternative methods of problem-solving in geoscience with emphasis on the role of mathematical geology. It is desirable to maintain a clear-cut distinction between reliable facts which can be...This is a brief review of alternative methods of problem-solving in geoscience with emphasis on the role of mathematical geology. It is desirable to maintain a clear-cut distinction between reliable facts which can be stored in data banks and concepts that can be incorporated in the specifications of statistical models designed for specific purposes. If possible, subjective probabilities should be incorporated in hypotheses that are to be tested by statistical inference.展开更多
20162110Chai Fushan(School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China);Chen Jianping Three-Dimensional Geological Data Conversion from FLAC3Dto Surpac Based on C#(Jou...20162110Chai Fushan(School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China);Chen Jianping Three-Dimensional Geological Data Conversion from FLAC3Dto Surpac Based on C#(Journal of Geology,ISSN1674-3636,CN32-1796/P,39(3),2015,p.491-494,4illus.,12refs.)展开更多
20162856 Cao Feng(China Institute of GeoEnvironmental Monitoring,Beijing 100081,China);Zheng Yuejun A Study of Suitable Area Selection for Artificial Recharge Based on GIS Technology—Taking Wulabo Basin as an Case St...20162856 Cao Feng(China Institute of GeoEnvironmental Monitoring,Beijing 100081,China);Zheng Yuejun A Study of Suitable Area Selection for Artificial Recharge Based on GIS Technology—Taking Wulabo Basin as an Case Study(Hydrogeology and Engineering Geology,ISSN1000-3665,CN11-2202/P,42(6),2015,p.44-50,8illus.,6tables,18refs.)展开更多
20180391 Liu Xikang （First Crust Monitoring and Application Center, CEA, Tianjin 300180, China） ; Ding Zhifeng 3D Focusing Inversion of Gravity Data Based on Conjugate Gradient and Its Application （Earthquake, ISSN...20180391 Liu Xikang （First Crust Monitoring and Application Center, CEA, Tianjin 300180, China） ; Ding Zhifeng 3D Focusing Inversion of Gravity Data Based on Conjugate Gradient and Its Application （Earthquake, ISSN1000-3274, CN11-1893/P, 36 （1）, 2017, p. 10-19, 5 illus. , 17 refs. ）Key words：gravity, thods, inverse problem The authors solve conjugate gradient methods, inverse problem The authors solve underdetermined linear objective function based on conjugate gradient algorithm. In order to improve the multiplicity results of the objective function, and eliminate the influence of redundant structure information, the roughness has been introduced. In order to overcome the ＂skin effect＂, the depth weighting function has also been added in the model objective function, and the minimum support function was also added in the objective function to better reflect the sharp features and tectonic boundary. Calculation of several models indicates that this method has good validity and stability. The proposed method was applied to the practical gravity data processing for inversion of 3D crust density, and obtained a good precision inversion results.展开更多
To evaluate the lateral sealing mechanism of extensional fault based on the pressure difference between fault and reservoir, an integral mathematical-geological model of diagenetic time on diagenetic pressure consider...To evaluate the lateral sealing mechanism of extensional fault based on the pressure difference between fault and reservoir, an integral mathematical-geological model of diagenetic time on diagenetic pressure considering the influence of diagenetic time on the diagenetic pressure and diagenetic degree of fault rock has been established to quantitatively calculate the lateral sealing ability of extensional fault. By calculating the time integral of the vertical stress and horizontal in-situ stress on the fault rock and surrounding rock, the burial depth of the surrounding rock with the same clay content and diagenesis degree as the target fault rock was worked out. In combination with the statistical correlation of clay content, burial depth and displacement pressure of rock in the study area, the displacement pressure of target fault rock was calculated quantitatively. The calculated displacement pressure was compared with that of the target reservoir to quantitatively evaluate lateral sealing state and ability of the extensional fault. The method presented in this work was used to evaluate the sealing of F_(1), F_(2) and F_(3) faults in No.1 structure of Nanpu Sag, and the results were compared with those from fault-reservoir displacement pressure differential methods without considering the diagenetic time and simple considering the diagenetic time. It is found that the results calculated by the integral mathematical-geological model are the closest to the actual underground situation, the errors between the hydrocarbon column height predicted by this method and the actual column height were 0–8 m only, proving that this model is more feasible and credible.展开更多
After long-term development, mathematical geology has today become an independent discipline. Big Data science, which has become a new scientific paradigm in the 21st century, gives rise to the geological Big Data, i....After long-term development, mathematical geology has today become an independent discipline. Big Data science, which has become a new scientific paradigm in the 21st century, gives rise to the geological Big Data, i.e. mathematical geology and quantitative geoscience. Thanks to a robust macro strategy for big data, China＇s quantitative geoscience and geological big data＇s rapid development meets present requirements and has kept up with international levels. This paper presents China＇s decade-long achievements in quantitative prediction and assessment of mineral resources, geoscience information and software systems, geological information platform development, etc., with an emphasis on application of geological big data in informatics, quantitative mineral prediction, geological environment and disaster management, digital land survey, digital city, etc. Looking ahead, mathematical geology is moving towards ＂Digital Geology＂, ＂Digital Land＂ and ＂Geological Cloud＂, eventually realizing China＇s grand ＂Digital China＂ blueprint, and these valuable results will be showcased on the international academic arena.展开更多
文摘This is a brief review of alternative methods of problem-solving in geoscience with emphasis on the role of mathematical geology. It is desirable to maintain a clear-cut distinction between reliable facts which can be stored in data banks and concepts that can be incorporated in the specifications of statistical models designed for specific purposes. If possible, subjective probabilities should be incorporated in hypotheses that are to be tested by statistical inference.
文摘20162110Chai Fushan(School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China);Chen Jianping Three-Dimensional Geological Data Conversion from FLAC3Dto Surpac Based on C#(Journal of Geology,ISSN1674-3636,CN32-1796/P,39(3),2015,p.491-494,4illus.,12refs.)
文摘20162856 Cao Feng(China Institute of GeoEnvironmental Monitoring,Beijing 100081,China);Zheng Yuejun A Study of Suitable Area Selection for Artificial Recharge Based on GIS Technology—Taking Wulabo Basin as an Case Study(Hydrogeology and Engineering Geology,ISSN1000-3665,CN11-2202/P,42(6),2015,p.44-50,8illus.,6tables,18refs.)
文摘20180391 Liu Xikang （First Crust Monitoring and Application Center, CEA, Tianjin 300180, China） ; Ding Zhifeng 3D Focusing Inversion of Gravity Data Based on Conjugate Gradient and Its Application （Earthquake, ISSN1000-3274, CN11-1893/P, 36 （1）, 2017, p. 10-19, 5 illus. , 17 refs. ）Key words：gravity, thods, inverse problem The authors solve conjugate gradient methods, inverse problem The authors solve underdetermined linear objective function based on conjugate gradient algorithm. In order to improve the multiplicity results of the objective function, and eliminate the influence of redundant structure information, the roughness has been introduced. In order to overcome the ＂skin effect＂, the depth weighting function has also been added in the model objective function, and the minimum support function was also added in the objective function to better reflect the sharp features and tectonic boundary. Calculation of several models indicates that this method has good validity and stability. The proposed method was applied to the practical gravity data processing for inversion of 3D crust density, and obtained a good precision inversion results.
基金Supported by the China National Science and Technology Major Project(41872153)Northeast Petroleum University Research Startup Fund(1305021839)。
文摘To evaluate the lateral sealing mechanism of extensional fault based on the pressure difference between fault and reservoir, an integral mathematical-geological model of diagenetic time on diagenetic pressure considering the influence of diagenetic time on the diagenetic pressure and diagenetic degree of fault rock has been established to quantitatively calculate the lateral sealing ability of extensional fault. By calculating the time integral of the vertical stress and horizontal in-situ stress on the fault rock and surrounding rock, the burial depth of the surrounding rock with the same clay content and diagenesis degree as the target fault rock was worked out. In combination with the statistical correlation of clay content, burial depth and displacement pressure of rock in the study area, the displacement pressure of target fault rock was calculated quantitatively. The calculated displacement pressure was compared with that of the target reservoir to quantitatively evaluate lateral sealing state and ability of the extensional fault. The method presented in this work was used to evaluate the sealing of F_(1), F_(2) and F_(3) faults in No.1 structure of Nanpu Sag, and the results were compared with those from fault-reservoir displacement pressure differential methods without considering the diagenetic time and simple considering the diagenetic time. It is found that the results calculated by the integral mathematical-geological model are the closest to the actual underground situation, the errors between the hydrocarbon column height predicted by this method and the actual column height were 0–8 m only, proving that this model is more feasible and credible.
文摘After long-term development, mathematical geology has today become an independent discipline. Big Data science, which has become a new scientific paradigm in the 21st century, gives rise to the geological Big Data, i.e. mathematical geology and quantitative geoscience. Thanks to a robust macro strategy for big data, China＇s quantitative geoscience and geological big data＇s rapid development meets present requirements and has kept up with international levels. This paper presents China＇s decade-long achievements in quantitative prediction and assessment of mineral resources, geoscience information and software systems, geological information platform development, etc., with an emphasis on application of geological big data in informatics, quantitative mineral prediction, geological environment and disaster management, digital land survey, digital city, etc. Looking ahead, mathematical geology is moving towards ＂Digital Geology＂, ＂Digital Land＂ and ＂Geological Cloud＂, eventually realizing China＇s grand ＂Digital China＂ blueprint, and these valuable results will be showcased on the international academic arena.
