It is very difficult to discriminate natural fractures using conventional well log data, especially for most of the matured oilfields in China, because the raw data were acquired with relatively obsolete tools. The ra...It is very difficult to discriminate natural fractures using conventional well log data, especially for most of the matured oilfields in China, because the raw data were acquired with relatively obsolete tools. The raw data include only GR and SP curves, indicative of lithology, AC curves, used to calculate the porosity of the formation, and a set of logging curves from various electrode length resistivity by laterolog. On the other hand, these oilfields usually have a large amount of core data which directly display the characteristics of the formation, and enough information of injection and production. This paper describes an approach through which logging curves are calibrated in terms of the raw data, and then a prototype model of natural fractures is established based on the investigation of core data from 43 wells, totaling 4 000 m in length. A computer program has been developed according to this method. Through analysis and comparison of the features of logging curves, this paper proposes a new concept, the well logging curve unit. By strictly depicting its shape through mathematical methods, the natural facture can be discriminated. This work also suggests an equation to estimate the probability of fracture occurrence, and finally other fracture parameters are calculated using some experimental expressions. With this methodology, logging curves from 100 wells were interpreted, the results of which agree with core data and field information.展开更多
Science and technology innovation has become a major driving force for economic growth and social development.Engineers are the primary group that carry out technology innovation in industrial production.And universit...Science and technology innovation has become a major driving force for economic growth and social development.Engineers are the primary group that carry out technology innovation in industrial production.And universities are the major institutions for cultivating engineers.However,with the rapid updating of technology,engineering education in universities failed to cope with the actual requirements of enterprises.In order to bridge the gap between university education and industry’s demands for talents,an innovating engineer education center is proposed in this paper.It was jointly developed by universities and enterprises.In the innovating center,enterprises were incorporated into universities’teaching systems.The longevity of university-enterprise cooperation was guaranteed in terms of funding,personnel and supervision.It shows that through the joint training of university and enterprises,students’engineering ability of collaborative development for on-the-ground projects is significantly strengthened.展开更多
文摘It is very difficult to discriminate natural fractures using conventional well log data, especially for most of the matured oilfields in China, because the raw data were acquired with relatively obsolete tools. The raw data include only GR and SP curves, indicative of lithology, AC curves, used to calculate the porosity of the formation, and a set of logging curves from various electrode length resistivity by laterolog. On the other hand, these oilfields usually have a large amount of core data which directly display the characteristics of the formation, and enough information of injection and production. This paper describes an approach through which logging curves are calibrated in terms of the raw data, and then a prototype model of natural fractures is established based on the investigation of core data from 43 wells, totaling 4 000 m in length. A computer program has been developed according to this method. Through analysis and comparison of the features of logging curves, this paper proposes a new concept, the well logging curve unit. By strictly depicting its shape through mathematical methods, the natural facture can be discriminated. This work also suggests an equation to estimate the probability of fracture occurrence, and finally other fracture parameters are calculated using some experimental expressions. With this methodology, logging curves from 100 wells were interpreted, the results of which agree with core data and field information.
文摘Science and technology innovation has become a major driving force for economic growth and social development.Engineers are the primary group that carry out technology innovation in industrial production.And universities are the major institutions for cultivating engineers.However,with the rapid updating of technology,engineering education in universities failed to cope with the actual requirements of enterprises.In order to bridge the gap between university education and industry’s demands for talents,an innovating engineer education center is proposed in this paper.It was jointly developed by universities and enterprises.In the innovating center,enterprises were incorporated into universities’teaching systems.The longevity of university-enterprise cooperation was guaranteed in terms of funding,personnel and supervision.It shows that through the joint training of university and enterprises,students’engineering ability of collaborative development for on-the-ground projects is significantly strengthened.
