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The variation of free gas distribution within the seeping seafloor hydrate stability zone and its link to hydrate formations in the Qiongdongnan Basin

Wei Deng, Jinqiang Liang, Zenggui Kuang, Tong Zhong, Yanian Zhang, Yulin He

Acta Geophysica

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2022

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Vol. 70, no 3

1115--1136

EN

China geological survey has conducted two hydrate expeditions for two gas chimney structures (GC1, GC2) in the Qiongdongnan Basin, South China Sea, where the fluid migrations vary significantly. Although massive hydrates were recovered both in the seepage pathways above GC1 and GC2, the free gas distributions in seeping seafloor hydrate stability zone (HSZ) remain controversial. Previous studies confirm that structure I (sI) and structure II (sII) hydrates occur through the whole seepage pathways, and free gas accumulates below the base of methane hydrate stability zone (BHSZ). In fact, free gas and gas hydrates coexist in the whole seepage-gas chimney system. The quantitative estimation of the fluid distribution is significant for studying the heterogeneous fluid migration in the seepages. In this study, Archie formula and three-phase Biot-type equation are modified to invert fluid concentrations for the whole well sections, in which brine, free gas, gas hydrate and matrix are considered as separate phases. The results indicate that the bottom simulating reflector is the boundary of an increasing gas concentration and a decrease hydrate concentration, instead of the interfaces of the hydrate and free gas in most areas. And hydrate occurrence is closely related to the micro-fault in the gas chimney. By comparing the fluid distribution between GC1 and GC2, more free gas associated with gas hydrates is accumulated in the seepage pathways in HSZ in GC1 where less free gas occurred below the BHSZ. Gas-bearing fluids in GC1 are considered to be very active in historic time, but they nearly stop flowing now, and the remaining gas cannot form hydrates in the hydrate-saturated pores, while the fluids in GC2 tend to convert to hydrates till now, and it is an active or younger fluid system. Free gas is the important intermediate medium for revealing this phase transition and exerts a significant control on the timescales associated with phase equilibrium variation processes. It is the first study revealing the relationship between the fluid distribution and the mobility of the seepage-gas chimney system in the study area, which also provide a new insight for estimating hydrate resource.

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Explosive Valencia – futuristic imagination and the power of tradition in creating the image of urban spaces. Competition and conflict, or coexistence and praise of diversity?

Kaczmarska Elżbieta

Technical Transactions

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2020

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Vol. 117, iss. 1

art. no. e2020007

EN

Selected districts of Valencia and the gradual transformation of their image are presented in this article. The formulation of an appropriate strategy of action and the effect of an example that were initiated by the construction of the City of Arts and Sciences have broken through the stagnation in thinking about space. Revitalisation efforts have been initiated in many of the city’s districts, as well as in its suburban zone. The great explosion of ideas and emotions also carried over to enhancing the historical traditions of the city and the holistic, multi-directional approach to the subject matter of renewal, providing the city with economic stimulation. The author’s own analyses presented in the article pertain to: Ciudad de las Artes y las Ciencias (City of Arts and Sciences), the new development of the Poblats Maritims coastal district, the Ciutat Fallera district and the Orba district of the town of Alfafar, located in Valencia’s metropolitan area. Various proposals for transforming the spatial structure of these districts point to the possibility of conducting an experimental hybrid policy intended to reconcile economic rescaling, entrepreneurship and cultural regionalism in the planned landscape.

PL

W artykule zaprezentowano wybrane dzielnice Walencji i stopniową przemianę ich obrazu. Budowa właściwej strategii działań i efekt przykładu zapoczątkowane przez realizację Miasta Sztuki i Nauki przełamały marazm w myśleniu o przestrzeni. Podjęto prace rewitalizacyjne w wielu dzielnicach miasta i jego strefie podmiejskiej. Wielki wybuch pomysłów i emocji przełożył się również na utrwalenie historycznych tradycji miasta i całościowe wielokierunkowe podejście do problematyki odnowy, co przyniosło miastu ożywienie gospodarcze. Własne analizy przedstawione w artykule dotyczyły kolejno: Ciudad de las Artes y las Ciencias (Miasta Sztuki i Nauki), nowej zabudowy dzielnicy nadmorskiej Poblats Maritims, dzielnicy Ciutat Fallera oraz dzielnicy Orba miasteczka Alfafar położonego w strefie metropolitarnej Walencji. Różnorodne pomysły przekształcenia struktury przestrzennej wymienionych dzielnic wskazują na możliwość prowadzenia eksperymentalnej hybrydowej polityki w celu pogodzenia przeskalowania gospodarczego, przedsiębiorczości i regionalizmu kulturowego w planowanym krajobrazie i przez niego.

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Wybuchowa Walencja. Futurystyczna wyobraźnia i siła tradycji w kreowaniu obrazu przestrzeni miejskich. Konkurencja i konflikt czy współistnienie i pochwała różnorodności?

Kaczmarska Elżbieta

PUA Przestrzeń Urbanistyka Architektura

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2020

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Vol. 2

73--92

PL

W artykule zaprezentowano wybrane dzielnice Walencji i stopniową przemianę ich obrazu. Budowa właściwej strategii działań i efekt przykładu zapoczątkowane przez realizację Miasta Sztuk i Nauk przełamały marazm w myśleniu o przestrzeni. Podjęto prace rewitalizacyjne w wielu dzielnicach miasta i jego strefie podmiejskiej. Wielki wybuch pomysłów i emocji przełożył się również na utrwalenie historycznych tradycji miasta i całościowe wielokierunkowe podejście do problematyki odnowy, co przyniosło miastu ożywienie gospodarcze. Własne analizy przedstawione w artykule dotyczyły kolejno: Ciudad de las Artes y las Ciencias (Miasta Sztuk i Nauk1), nowej zabudowy dzielnicy nadmorskiej Poblats Marítims, dzielnicy Ciutat Fallera oraz dzielnicy Orba miasteczka Alfafar położonego w strefie metropolitarnej Walencji.

EN

This article presents selected districts of Valencia and the gradual transformation of their image. The formulation of an appropriate strategy of action and the effect of an example that were initiated by the construction of the City of Arts and Sciences have broken through the stagnation in thinking about space. Revitalisation efforts have been initiated in many of the city’s districts, as well as in its suburban zone. The great explosion of ideas and emotions also carried over to expanding the historical traditions of the city and the holistic, multi-directional approach to the subject matter of renewal, providing the city with economic stimulation. The author’s own analyses presented in the article pertain to Ciudad de las Artes y las Ciencias (City of Arts and Sciences), the new development of the Poblats Marítims coastal district, the Ciutat Fallera district and the Orba district of the town of Alfafar, located in Valencia’s metropolitan area. Various proposals for transforming the spatial structure of these districts point to the possibility of conducting an experimental hybrid policy intended to reconcile economic rescaling, entrepreneurship and cultural regionalism in the planned landscape.

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Industrial urban landscapes. The dismissed canal areas of B5 in the Netherlands as case study

Curulli I.

Przestrzeń i Forma

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2015

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nr 24/1

103--112

EN

Industrial sites used to be located outside of the dense urban fabric. Nowadays, they are dismissed and the growth of the contemporary city has enclosed them in the old urban fabric. These sites have become ‘available’ places for perspective development. In general, abandoned industrial areas are regarded as ordinary and valueless places, neglected places within the mental map of the city. On the contrary, they are extremely important reminders of our industrial past, significant layers of our history to be safeguarded and to work with for the development of the contemporary city. They are a challenge for designers, in that these have to unveil the peculiarities of the sites, to understand the unique features of the factories remnants and to provide an appropriate interpretation. This paper focuses on the transformation of the industrial canal landscape circuit of B5 (BrabantStad) that connects five cities in The Netherlands. It will show the results of a research carried out for the first time on this subject. Along the canal circuit, dated 1800, are valuable industrial sites that risk the fragmentation and standardization, thus erasing local identity and memory. The former canal zone of Eindhoven will be presented as a case specific. The research was developed at the Eindhoven University of Technology with the collaboration of local Municipalities, heritage institutions and the North-Brabant Province that funded the research. The investigation aimed at studying the stratified layers of the industrial canal areas and at proposing quality scenarios where the old and new can harmoniously coexist.

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Pozostać architektem

Mizia M.

Czasopismo Techniczne. Architektura

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2009

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R. 106, z. 1-A

411-415

PL

2030 lat minęło od udokumentowania traktatem [1] fenomenu i kunsztu budowy miast. W zasadzie nic istotnego od tej pory się nie zmieniło. Architekt nadal jest wysoce specjalizowanym rzemieślnikiem, twórcą, artystą, wizjonerem. Nadal, jak w starożytności, buduje wirtualne struktury, wymyśla nowy świat, a właściwie wykorzystuje do swoich obrazoburczych nierzadko pomysłów wnikliwą obserwację przyrody i znajomość zdobyczy współczesności. Przede wszystkim jednak śledzi rozwój sztuki i wszelkich dokonań artystycznych, będących działaniami najbardziej awangardowymi, bo na końcu zawsze intuicyjnymi i w efekcie ukierunkowującymi w ogóle odkrywczość myśli.

EN

2030 years have passed since documenting with a treatise the phenomenon and art of constructing cities. In principle, nothing important has changed since that time. An architect continues to be a highly skilled craftsman, creator, artist and visionary. Just as in the ancient times, he builds virtual structures, he invents anew world and in reality he makes use of the art of careful observation of nature and of his knowledge of contemporary scientific achievements for his not infrequently iconoclastic ideas. Yet above all, he keeps track of the development of art and of all artistic achievements which are the most avant-garde type of activities, as ultimately they are always intuitive and consequently giving direction to the innovativeness of thought.