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Showing 3 results for Permeability
Dynamic Single Well Modeling for Hydrocarbon Reservoir Characterization: Case Study of a Gas Reservoirs in South of Iran
Mr Mahdi Amirsardari,
Volume 8, Issue 2 (12-2022)
Abstract

Accurate reservoir description in hydrocarbon and water bearing zones is one of the most important steps in reservoir characterization and modeling. Information about reservoir properties can be obtained from different sources such as geological data, seismic data, well logging data, core measurement data, well test data and reservoir production history. Well test data contain valuable information on the dynamic behavior of reservoirs. It is essential to integrate all sources of information for a successful description of a reservoir. However, it is a relatively difficult task to integrate all sources of information quantitatively, since these sources of information have different resolutions.  The main objective of the third phase of this project is to find fine-scale permeability profile in the gas and water zones of the studied field. For this purpose, in a history matching process of the bottomhole pressure, the permeability distribution estimated from petrophysical and core data has been corrected by the calculated permeability from analytical well test interpretation. Of course, the other effective parameters to be adjusted during the history match of the bottomhole pressure are the skin factor and the rate-dependent skin. Capillary pressure and relative permeability should also be used for matching of DST water production data. In this study, 6 DSTs from two wells were investigated. In this report the methodology of single well simulation study including model construction, initialization and history matching for 6 DSTs has been described. The results of this study will be used as input data for the sector simulation modeling.


Studying the performance of urea and potassium sulfate fertilizers on water erosion of soils by using a rainfall simulator (Case study: Heidareh region of Hamedan)
Dr. Seyed Davoud Mohammadi, Ms. Fatemeh Rouhi Moein,
Volume 9, Issue 1 (9-2023)
Abstract
Water and wind erosions are the two main factors of soil degradation. But these two processes alone, without human intervention, cause natural erosion and pose little risks to soil. Soil provides food security, preserves water resources, and affects the global climate. Soil reduces water pollutants and is also a carbon storage. The economic need for soil is greater in the world's developing countries because, in these regions, deprived farmers do not have enough resources to carry out erosion control methods. As a result, the risk of soil erosion continues to increase. Various parameters affect the erodibility of soils, including fertilizers. To investigate the effect of urea and potassium sulfate fertilizers on the soils of the Heidareh area of Hamedan, three sampling stations were selected, and then basic experiments including soil sample size, determination of Gs, Atherberg limits, pinhole test, determination of calcium carbonate percentage, determination of the organic matter, chlorine determination, sulfate content, and pH were conducted on soil samples. In this regard, the percentages of 1%, 3%, 5%, 7%, and 9% of urea fertilizer and potassium sulfate fertilizer were added separately to the soil samples of the studied stations. Then pinhole and erodibility tests were conducted using a rainfall simulator with different percentages of urea fertilizer and potassium sulfate fertilizer on soil samples of all three stations in dips of 10, 20, 30, and 40 degrees. The results of the erosion test show that with increasing the amount of fertilizers, the amount of eroded soil in all sampling stations has decreased significantly. The reason for reducing erosion can be related to increasing soil permeability and reducing runoff, by increasing the amount of fertilizers and the lack of fertilizers' effect on soil dispersion

Land subsidence potential in the Tahlab plain and the relationship between domestic wastewater and collapse in sewage wells in the Rig-Malek city, southeast of Zahedan
Dr. Reza Jahanshahi, Mr. Ebrahim Gamshadzahi Mahboub, Dr. Hamid Reza Soloki, Prof. Mehdi Azhdary Moghaddam,
Volume 10, Issue 2 (12-2024)
Abstract
The Tehlab plain is located in the Hamoun Mashkil catchment in the south of Mirjavah region and along the Iran-Pakistan border. In most of the rural areas of this plain, especially in the northern parts of the plain along the border of Iran and Pakistan, the effects of land subsidence in the form of cracks and fissures in buildings as well as collapse in sewage wells were observed. In order to evaluate these land subsidences, the Tehlab plain was first zoned in terms of subsidence risk. Based on the land subsidence risk zoning map, it can be seen that most of the areas of the Tahlab plain have a low risk of subsidence, except for the northern region, where there are many exploitation wells in this area. To study the collapse in sewage wells and its relationship with soil type in the northern regions of the plain, the collapsibility of soil samples was investigated. According to Jennings and Knight criteria in the oedometer device in the laboratory in the saturated state. the coefficient of collapsible of soil samples was measured between 0.21 to 7.3, which showed that the soil samples were collapsible in this area. Finally, to investigate the occurrence of collapse in sewage wells in the northern of the plain, an in-situ permeability test (ring) test was performed at different depths of a dug well. This test showed that a soil layer with high permeability rate (9.24 cm/hr) was located between low permeability layers. These low permeability layers caused an increasing the water level in the sewage wells. Moreover, the liquid limit of most surface soil samples was less than 30%. Therefore, the soil permeability and liquid limit were the most important factors controlling collapse in the sewage wells.

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