在本世纪六十年代,国外曾经出版若干部系统地讲西藏历史和藏族文化史的著作,一时颇有风起云涌之势,在这一浪潮过去后,近二十多年来,虽然西藏地方发生了巨大的变化,但国外这一类出版物反而不多。读过1987年出版的美国纽约州立大学助教授...在本世纪六十年代,国外曾经出版若干部系统地讲西藏历史和藏族文化史的著作,一时颇有风起云涌之势,在这一浪潮过去后,近二十多年来,虽然西藏地方发生了巨大的变化,但国外这一类出版物反而不多。读过1987年出版的美国纽约州立大学助教授谭·戈伦夫(A.Tom Grunfeld)著《近代西藏的诞生》(The Making of ModernTibet)我觉得它宛如一声惊蛰的春雷,给关心西藏历史研究的人们启示一个新的研究天地的到来,也给渴望了解西藏的一切的人们带来了温润的知识的新雨。本来。展开更多
From observing cores of 18 wells,identifying 175 ordinary thin sections and 61 thin casting sections,energy spectrum analyses of 37 samples,homogenization temperature measurement of fluid inclusions of 11 samples,we d...From observing cores of 18 wells,identifying 175 ordinary thin sections and 61 thin casting sections,energy spectrum analyses of 37 samples,homogenization temperature measurement of fluid inclusions of 11 samples,we determine the types of diagenesis and pores of the Fuyu oil reservoir in the north Qijia region.We classified the pores and measured their plane porosity using CIA 2000,the software of rock image analysis,calculated the effect of different kinds of diagenesis on porosity,studied the controlling actions of diagenesis to pore evolution quantitatively,combined with burial history,thermal history and their diagenetic environments.Our results show that mechanical compaction and carbonate cementation are the major destructive diagenesed,developed during early diagenesis stages.The reduction in porosity by mechanical compaction and carbonate cementation are about 25% and 8%,while the destructive intensity of siliceous cementation and clay mineral cementation is relatively much smaller,i.e.,the reduction of porosity is about 2% and 0.2% Dissolution is constructive diagenesis,the increment of porosity is about 6%.There are four diagenesis evolution stages,during which the porosity reduced from 30%～38% to 2%～20%.Mechanical compaction and early cementation are the main diageneses in the early diagenesis stages,when porosity was reduced to 2%～10%.Dissolution is the main diagenesis of an A I substage of the middle diagenesis stage,when porosity increased 1%～8%.The dissolution of the A Ⅱ substage of the middle diagenesis stage affected by late cementation,raised porosity 1%～5%.The porosity varied slightly during the middle stage B.展开更多
文摘在本世纪六十年代,国外曾经出版若干部系统地讲西藏历史和藏族文化史的著作,一时颇有风起云涌之势,在这一浪潮过去后,近二十多年来,虽然西藏地方发生了巨大的变化,但国外这一类出版物反而不多。读过1987年出版的美国纽约州立大学助教授谭·戈伦夫(A.Tom Grunfeld)著《近代西藏的诞生》(The Making of ModernTibet)我觉得它宛如一声惊蛰的春雷,给关心西藏历史研究的人们启示一个新的研究天地的到来,也给渴望了解西藏的一切的人们带来了温润的知识的新雨。本来。
基金the National Basic Research Program of China (No.2009 CB219306)the Important National Science & Technology Specific Projects (No.2009GYXQ14)
文摘From observing cores of 18 wells,identifying 175 ordinary thin sections and 61 thin casting sections,energy spectrum analyses of 37 samples,homogenization temperature measurement of fluid inclusions of 11 samples,we determine the types of diagenesis and pores of the Fuyu oil reservoir in the north Qijia region.We classified the pores and measured their plane porosity using CIA 2000,the software of rock image analysis,calculated the effect of different kinds of diagenesis on porosity,studied the controlling actions of diagenesis to pore evolution quantitatively,combined with burial history,thermal history and their diagenetic environments.Our results show that mechanical compaction and carbonate cementation are the major destructive diagenesed,developed during early diagenesis stages.The reduction in porosity by mechanical compaction and carbonate cementation are about 25% and 8%,while the destructive intensity of siliceous cementation and clay mineral cementation is relatively much smaller,i.e.,the reduction of porosity is about 2% and 0.2% Dissolution is constructive diagenesis,the increment of porosity is about 6%.There are four diagenesis evolution stages,during which the porosity reduced from 30%～38% to 2%～20%.Mechanical compaction and early cementation are the main diageneses in the early diagenesis stages,when porosity was reduced to 2%～10%.Dissolution is the main diagenesis of an A I substage of the middle diagenesis stage,when porosity increased 1%～8%.The dissolution of the A Ⅱ substage of the middle diagenesis stage affected by late cementation,raised porosity 1%～5%.The porosity varied slightly during the middle stage B.
