Wyniki wyszukiwania - BazTech

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Trachyte reservoir characteristics and favorable reservoir identification and prediction in the J34 block, Eastern Sag

Ma Chenglong, Wu Ying, Gu Tuan, Zhang Bin, Li Yu Gang, Zhang Ying Jie, Dong Wen Bo, Cui Jie

Acta Geophysica

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2022

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Vol. 70, no 4

1635--1650

EN

Influenced by tectonic activities such as the Tan-Lu Fault and mantle uplift, frequent volcanic activity in the Eastern Sag of the Liaohe Basin has resulted in the widespread development of volcanic rocks, such as basalt and trachyte, in the third member of the Shahejie Formation. Exploration and development have confirmed the presence of large oil and gas displays in trachyte reservoirs. However, previous studies have focused on the whole Eastern Sag or the volcanic rocks in the north, middle, and south sections of the Eastern Sag, while the J34 block has rarely been examined. There are challenges associated with the exploration and development of the J34 block, such as difficulties with trachyte lithology identification, reservoir space identification, quantitative logging identification, and prediction of horizontal and vertical distribution of lithologic characteristics. Therefore, this study presents an investigation and analysis of the characteristics of trachyte reservoirs, and the identification and prediction of favorable reservoirs based on core data, core sampling analysis, well logging, seismic data, and development dynamic data. The results showed that the volcanic rocks in the study area mainly include three types of lithology: trachytic breccia, trachytic lava, and basaltic lava, with trachytic breccia being the most important and favorable reservoir lithology. The trachyte reservoir space is mainly fractured and vuggy, and the secondary reservoir space is often superimposed onto the primary reservoir space, which significantly increases reservoir performance. Using the logging response characteristics of different lithologies and optimizing sensitivity curves, the quantitative identification criteria of different types of volcanic rocks were established. At the same time, the distribution characteristics of favorable reservoirs were determined by reconstructed wave impedance inversion with sensitive parameters, which showed that favorable reservoirs are mainly distributed along faults. Further analysis of the controlling factors of trachyte reservoirs can effectively guide the oil and gas development in this block and provide a reference for the exploration and development of similar blocks.

2

Identification of volcanic lithofacies using box-counting method calculating fractal dimension of logging data

Mou Dan, Wang Zhuwen, Tan Xili, Shi Shaoyun

Acta Geophysica

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2022

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Vol. 70, no 6

2647--2658

EN

Identification of volcanic lithofacies is critical for reservoir exploration and a major difficulty in China's Liaohe oil field. In this paper, we present a fractal analysis method for identifying volcanic facies by estimating the fractal dimension of logging data. The fractal properties of lithofacies logging curves are explored, as well as the categorization scheme of volcanic lithofacies in the eastern sag of the Liaohe basin. Five logging curves impacted by volcanic lithofacies from four wells in the Liaohe basin's eastern depression were chosen. The Box-counting dimension is used to develop a logging lithofacies identification criterion. Furthermore, we calculated the fractal dimension of logging curves using box-counting dimension methods.

3

Neogene seismites and seismic volcanic rocks in the Linqu area, Shandong Province, E China

Tian H. S., Zhang B. H., Zhang S. H., Lü M. Y.

Geologos

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2014

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Vol. 20, No. 2

125--137

EN

The Yishu Fault Zone runs through the centre of Shandong Province (E China); it is a deep-seated large fault system that still is active. Two volcanic faulted basins (the Shanwang and Linqu Basins) in the Linqu area, west of the fault zone, are exposed to rifting, which process is accompanied by a series of tectonic and volcanic earthquakes with a magnitude of 5–8. Lacustrine sediments in the basins were affected by these earthquakes so that seismites with a variety of softsediment deformation structures originated. The seismites form part of the Shanwang Formation of the Linqu Group. Semi-consolidated fluvial conglomerates became deformed in a brittle way; these seismites are present at the base of the Yaoshan Formation. Intense earthquakes triggered by volcanic activity left their traces in the form of seismic volcanic rocks associated with liquefied-sand veins in the basalt/sand intercalations at the base of the Yaoshan Formation. These palaeo-earthquake records are dated around 14–10 Ma; they are responses to the intense tectonic extension and the basin rifting in this area and even the activity of the Yishu Fault Zone in the Himalayan tectonic cycle.

4

Wykorzystanie skały wulkanicznej w budownictwie

Przerada I., Zawada A.

Materiały Ceramiczne

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2012

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T. 64, nr 3

374-377

PL

Skała wulkaniczna stanowi doskonały surowiec, który nie wymaga znaczących modyfikacji. Zastosowana do wytwarzania bloków kominowych sprawia, że charakteryzują się one dobrymi parametrami izolacyjnymi oraz wysoką odpornością na działanie kwasów. W pracy zbadano skład fazowy i mikrostrukturę naturalnej skały wulkanicznej pochodzącej z wciąż czynnego wulkanu Stromboli oraz bloku kominowego, zawierającego w swym składzie skałę wulkaniczną pochodzącą z Irlandii. Uzyskane wyniki analizy porównawczej wykazały, że w badanych skałach wulkanicznych występują różnice w składzie fazowym.

EN

Volcanic rock is an excellent resource that does not require significant modification. Used for the production of chimney blocks, it makes them to have good insulating characteristics and high resistance to acids. The study investigated the phase composition and microstructure of both natural volcanic rock derived from the still active volcano of Stromboli and a chimney block, which contained in its composition a volcanic rock that originated from Ireland. Phase compositions of the volcanic rock and the building material used in the chimney systems were different.

5

Wytrzymałość na ściskanie i na rozciąganie betonów zwykłych i wysokowartościowych z różnymi kruszywami łamanymi

Piasta W., Góra J.

Cement Wapno Beton

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2006

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R. 11/73, nr 3

184-192

PL

Przedstawiono wyniki badań dotyczących wytrzymałości betonów zwykłych oraz wysokowartościowych z trzech kruszyw grubych: bazaltowego, granitowego i dolomitowego. Wszystkie wyniki poddano analizie statystycznej. Wyższą wytrzymałość na rozciąganie przy rozłupywaniu posiadały betony zwykłe i wysokowartościowe z kruszywem dolomitowym w porównaniu do wytrzymałości fctm betonów z kruszywem bazaltowym oraz granitowym. W przypadku wytrzymałości BWW na ściskanie znaleziono korzystniejszy wpływ kruszywa dolomitowego niż granitowego. Natomiast różnice w wytrzymałościach na ściskanie betonów zwykłych z różnych kruszyw były statystycznie nieistotne.

EN

Normal and high performance concretes (hpc) were tested to find an effect of the three different coarse aggregates (basalt, granite and dolomite) on concrete strength properties. All the results were analyzed statistically. Splitting tensile strength of normal concrete and hpc with dolomite aggregate was significantly higher than that of concretes with basalt and granite aggregate. The effect of dolomite aggregate on compressive strength of hpc was much more advantageous than that of granite aggregate. No statistically significant difference was determined in compressive strength of normal concretes with all the three aggregates.