scholarly journals Recrystallization: A Stage of Rock Formation and Development

10.5772/34142 ◽  
2012 ◽  
Author(s):  
R.L. Brodskaya ◽  
Yu B.
Keyword(s):  
Rock Formation

Holocene Intertidal Microbial Mats Of Qatar And Their Implications For Petroleum Source Rock Formation In Carbonate-Siliciclastic-Evaporite Systems

2014 ◽  
Author(s):  
Miroslaw Slowakiewicz ◽  
Richard D. Pancost ◽  
Lisa Thomas ◽  
Maurice E. Tucker ◽  
Sher Mey Didi-Ooi ◽  
...  
Keyword(s):  
Source Rock ◽  
Microbial Mats ◽  
Rock Formation ◽  
Petroleum Source Rock

PEMETAAN POTENSI MATAAIR DI PULAU BALI

2018 ◽  
Vol 4 (2) ◽  
Author(s):  
Noorhadi Rahardjo
Keyword(s):  
Spatial Analysis ◽  
Volcanic Rock ◽  
Urban Area ◽  
Geologic Structure ◽  
High Discharge ◽  
Rock Formation ◽  
Domestic Use

There are three objectives of this research. First, to map springs location, second to know spring characteristic and third to calculat springs potency for domestic use. To reach these aims, springs location were plotted on map base on its coordinate. Springs characteristic were analysed descriptively by spatial analysis base on geologic, geomorphologic and hydrogeologic conditions. Springs potency were calculated base on its discharge, whereas domestic use was determined 60 l/person/day for rural and 120 l/person/day for urban area. The study shows, that springs distribution in Bali Island are not homogeny Springs appearance were controlled by geologic structure as fault and rock contact. The differences of discharge also depend on the structure. Contact between volcanic rock (tuff and lahar) from Buyan-Bratan-Batur Formations with another rock formation in its surrounding result many springs appereance with high discharge. Beside that, orohydrology properties of Agung Mount as strato volcanic result springs belt in a certain elevation and each slope changing. Base on calculation, springs potency in Bali Island are 628.800 m3/month,whereas the domestic use is 9.079.990 m3/month. So, the springs potency is just 6,9% from domestic use in Bali Island.Key words : springs potency, springs distribution, springs characteristic

Automatic identification of rock formation interface based on borehole imaging

2021 ◽  
pp. 1-13
Author(s):  
Cancan Liu ◽  
Xigui Zheng ◽  
Lu Yang ◽  
Peng Li ◽  
Niaz Muhammad Shahani ◽  
...  
Keyword(s):  
Automatic Identification ◽  
Rock Formation ◽  
Borehole Imaging

A gas migration law study of a large-scale 3D physical similarity simulation with an adaptive Kalman filter algorithm

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yuyu Hao ◽  
Shugang Li ◽  
Tianjun Zhang
Keyword(s):  
Kalman Filter ◽  
Large Scale ◽  
Gas Migration ◽  
Adaptive Kalman Filter ◽  
Physical Similarity ◽  
Content Type ◽  
Gas Concentration ◽  
Rock Formation ◽  
Concentration Estimation ◽  
Migration Law

Purpose In this study, a physical similarity simulation plays a significant role in the study of crack evolution and the gas migration mechanism. A sensor is deployed inside a comparable artificial rock formation to assure the accuracy of the experiment results. During the building of the simulated rock formation, a huge volume of acidic gas is released, causing numerous sensor measurement mistakes. Additionally, the gas concentration estimation approach is subject to uncertainty because of the complex rock formation environment. As a result, the purpose of this study is to introduce an adaptive Kalman filter approach to reduce observation noise, increase the accuracy of the gas concentration estimation model and, finally, determine the gas migration law. Design/methodology/approach First, based on the process of gas floatation-diffusion and seepage, the gas migration model is established according to Fick’s second law, and a simplified modeling method using diffusion flux instead of gas concentration is presented. Second, an adaptive Kalman filter algorithm is introduced to establish a gas concentration estimation model, taking into account the model uncertainty and the unknown measurement noise. Finally, according to a large-scale physical similarity simulation platform, a thorough experiment about gas migration is carried out to extract gas concentration variation data with certain ventilation techniques and to create a gas chart of the time-changing trend. Findings This approach is used to determine the changing process of gas distribution for a certain ventilation mode. The results match the rock fissure distribution condition derived from the microseismic monitoring data, proving the effectiveness of the approach. Originality/value For the first time in large-scale three-dimensional physical similarity simulations, the adaptive Kalman filter data processing method based on the inverse Wishart probability density function is used to solve the problem of an inaccurate process and measurement noise, laying the groundwork for studying the gas migration law and determining the gas migration mechanism.

scholarly journals Magmatic and Postmagmatic Mineral Associations of the Malyutka Massif Rocks (Khudolazovkiy Complex of the South Urals)

2021 ◽  
Vol 20 (2) ◽  
pp. 99-109
Author(s):  
I.R. Rakhimov ◽  
Keyword(s):  
Chemical Composition ◽  
Crystallization Temperature ◽  
Equilibrium Temperature ◽  
South Urals ◽  
The South ◽  
Accessory Minerals ◽  
Rock Formation ◽  
Genetic Interpretation ◽  
Mineral Associations ◽  
Ore Minerals

The results of detailed mineralogical studies of the Malyutka massif altered rocks of the Khudolazovskiy differentiated complex are presented. The morphology and chemical composition of many rock-forming and accessory minerals are described. According to the study, the magmatic and post-magmatic (hydrothermal-metasomatic) stages of rock formation are distinguished. The problems associated with the genetic interpretation of a number of rock-forming and ore minerals are discussed. The conclusion about the polygenic nature of the formation of spinelids is made. The equilibrium temperature in the «Ti-magnetite–ilmenite» system (633–650 °C), as well as the crystallization temperature of chlorite, replacing phlogopite and hornblende (145–185 °C), were estimated.

Sign in / Sign up

Export Citation Format

Share Document