Cyclostratigraphy for Low Resistivity Reservoir Assessment: An Example from “S” Field, Northern Kutai Basin

The tailings of Zeida's abandoned mine are found near the city of Midelt, in the middle of the high Moulouya watershed between the Middle and the High Atlas of Morocco. The tailings occupy an area of about 100 ha and are stored either in large mining pit lakes with clay-marl substratum or directly on a heavily fractured granite bedrock. The high contents of lead and arsenic in these tailings have transformed them into sources of pollution that disperse by wind, runoff, and seepage to the aquifer through faults and fractures. In this work, the main goal is to identify the pathways of contaminated water with heavy metals and arsenic to the local aquifers, water ponds, and Moulouya River. For this reason, geophysical surveys including electrical resistivity tomography (ERT), seismic refraction tomography (SRT) and very low-frequency electromagnetic (VLF-EM) methods were carried out over the tailings, and directly on the substratum outside the tailings. The result obtained from combining these methods has shown that pollutants were funneled through fractures, faults, and subsurface paleochannels and contaminated the hydrological system connecting groundwater, ponds, and the river. The ERT profiles have successfully shown the location of fractures, some of which extend throughout the upper formation to depths reaching the granite. The ERT was not successful in identifying fractures directly beneath the tailings due to their low resistivity which inhibits electrical current from propagating deeper. The seismic refraction surveys have provided valuable details on the local geology, and clearly identified the thickness of the tailings and explicitly marked the boundary between the Triassic formation and the granite. It also aided in the identification of paleochannels. The tailings materials were easily identified by both their low resistivity and low P-wave velocity values. Also, both resistivity and seismic velocity values rapidly increased beneath the tailings due to the compaction of the material and lack of moisture and have proven to be effective in identifying the upper limit of the granite. Faults were found to lie along the bottom of paleochannels, which suggest that the locations of these channels were caused by these same faults. The VLF-EM surveys have shown tilt angle anomalies over fractured areas which were also evinced by low resistivity area in ERT profiles. Finally, this study showed that the three geophysical methods were complementary and in good agreement in revealing the pathways of contamination from the tailings to the local aquifer, nearby ponds and Moulouya River.

Download Full-text

An Introduction of MAINE Petrophysical Method; a Solution for Uncertainty in Low Resistivity Pay Silisiclastic Reservoir Case

Proc of Indonesian Petroleum Association 42nd Annual Convention ◽

10.29118/ipa19.g.545 ◽

2018 ◽

Author(s):

M. Reza

Keyword(s):

Low Resistivity

Download Full-text

Using Statistical Methods to Optimize Patterning Parameters for Tungsten Deposition

ISTFA 2007: Conference Proceedings from the 33rd International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2007p0319 ◽

2007 ◽

Author(s):

Michael DiBattista ◽

Kimball Skinner ◽

Rick Kneedler ◽

Leonid Vasilvey ◽

Lukas Drybcak ◽

...

Keyword(s):

Failure Analysis ◽

Statistical Methods ◽

Deposition Rates ◽

Low Resistivity ◽

Material Deposition ◽

Deposition Parameters ◽

Beam Parameters

Abstract Circuit edit and failure analysis require tungsten deposition parameters to accomplish different goals. Circuit edit applications desire low resistivity values for rewiring, while failure analysis requires high deposition rates for capping layers. Tungsten deposition can be a well controlled process for a variety of beam parameters. For circuit edit, tungsten resistivity approaching below 150 µohm-cm and 50 μm3/nC is predicted. Material deposition rates of 80 μm3/nC can be achieved with reasonable pattern accuracy using defocus as a parameter.

Download Full-text

Integrated reservoir assessment and characterization: Final report, October 1, 1985--September 30, 1988

10.2172/6212705 ◽

1989 ◽

Cited By ~ 1

Author(s):

M. Honarpour ◽

M. Szpakiewicz ◽

B. Sharma ◽

Ming-Ming Chang ◽

R. Schatzinger ◽

...

Keyword(s):

Final Report ◽

Reservoir Assessment

Download Full-text

Applications of CoSi2 to VLSI and ULSI

MRS Proceedings ◽

10.1557/proc-320-3 ◽

1993 ◽

Vol 320 ◽

Cited By ~ 7

Author(s):

S. P. Murarka

Keyword(s):

Corrosion Resistance ◽

High Temperature ◽

Integrated Circuits ◽

Lattice Mismatch ◽

Electrical Contacts ◽

High Conductivity ◽

Low Resistivity ◽

Polysilicon Films ◽

Continued Use

ABSTRACTSilicides have found application as high conductivity, high temperature, and corrosion resistance materials that form good electrical contacts to silicon and good low resistivity cladding on polysilicon films used as gate metal. Of various silicides investigated in past CoSi2 offers several advantages including lowest resistivity, self-aligned formation, low lattice mismatch with silicon, stability in presence of dopants and on SiO2, Si3N4, or Sioxynitrides, and reliability to process temperatures ≤900°C even when used in thicknesses as thin as 50-60 nm. Thus, CoSi2 has found an application in VLSI and ULSI. In this paper, the properties, formation and processing, reliability, and applicability of CoSi2 will be reviewed. It will be shown that CoSi2 is only silicide that offers properties and reliability for continued use in sub-0.25 pm VLSI and ULSI integrated circuits.

Download Full-text

Study on the effect of Sn concentration on the structural, optical, and electrical properties of (Al0.55In0.45)2O3:Sn films

New Journal of Chemistry ◽

10.1039/d0nj06088g ◽

2021 ◽

Author(s):

Yangmei Xin ◽

Dong Zhang ◽

Zizhan Li ◽

Hua Qin ◽

Junshan Xiu ◽

...

Keyword(s):

Electrical Properties ◽

High Mobility ◽

Optical And Electrical Properties ◽

Low Resistivity

The MOVPE method is applied to deposit the (Al0.55In0.45)2O3:Sn films with high mobility as well as low resistivity.

Download Full-text

Developed Approach for Better Understanding of Low Resistivity Pay Carbonate Reservoirs

10.2118/137663-ms ◽

2010 ◽

Cited By ~ 4

Author(s):

Adel Obeidi ◽

Fatema Mohamed Al Aryani ◽

Mohsen Ahmed Al Amoudi

Keyword(s):

Carbonate Reservoirs ◽

Low Resistivity

Download Full-text

An investigation into the cause of road failure along Sagamu-Papalanto highway southwestern Nigeria

Geoenvironmental Disasters ◽

10.1186/s40677-020-00174-8 ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Ubido Oyem Emmanuel ◽

Igwe Ogbonnaya ◽

Ukah Bernadette Uche

Keyword(s):

Construction Materials ◽

Road Construction ◽

Linear Shrinkage ◽

Liquid Limit ◽

Dry Density ◽

Maximum Dry Density ◽

Southwestern Nigeria ◽

Low Resistivity ◽

The Road ◽

Cause Of Failure

AbstractInvestigation into the cause of road failure has been carried out along a 60 km long Sagamu –Papalanto highway southwestern Nigeria. Geochemical, mineralogical, geotechnical and geophysical analyses were conducted to evaluate the cause of failure along the study area. The results of the laboratory tests showed that the percentage amount of fines ranges from 12 to 61.3%, natural moisture content from 6.8 to 19.7%, liquid limit in the range of 25.1–52.2%, linear shrinkage between 3.96 to 12.71%, plastic limit ranges from 18.2–35%, plasticity index ranges from 5.2 to 24.6%, free swell in the range from 5.17–43.9%, maximum dry density ranges from 1.51–1.74 g /cm3, specific gravity ranges from 2.52–2.64 and CBR between 3 and 12%. The Cone Penetrometer Test (CPT) shows a resistance value of 20–138 kgf/cm2. The major clay mineral that is predominant in the studied soil is kaolinite. The major oxides present are SiO2, Al2O3, Fe2O3, K2O, Na2O, MgO and CaO. The result of the 2D Electrical Resistivity Imaging revealed a low resistivity values for profile 2 and 3 ranging from 100 Ωm – 300 Ωm, between a distance of 20 m – 240 m along the profile to a depth of 7.60 m and a low resistivity value ranging from 50 Ωm – 111Ωm, between a distance of 80 m − 120 m along the profile to a depth of 15 m. It was concluded that the low CBR, low MDD and the class of subsoils namely A-26, A-7, A-2-7 (clayey soils) which were identified are responsible for the cause of failure experienced in the study area. These makes the soils unsuitable as road construction materials and hence, there is need for stabilization during the reconstruction and rehabilitation of the road.

Download Full-text

Studying the Depth Structure of the Kyrgyz Tien Shan by Using the Seismic Tomography and Magnetotelluric Sounding Methods

Geosciences ◽

10.3390/geosciences11030122 ◽

2021 ◽

Vol 11 (3) ◽

pp. 122

Author(s):

Irina Medved ◽

Elena Bataleva ◽

Michael Buslov

Keyword(s):

Seismic Tomography ◽

High Velocity ◽

Fault Zones ◽

Magnetotelluric Sounding ◽

Tien Shan ◽

High Resistivity ◽

Low Velocity ◽

Low Resistivity ◽

Velocity Models ◽

Fluid Saturation

This paper presents new results of detailed seismic tomography (ST) on the deep structure beneath the Middle Tien Shan to a depth of 60 km. For a better understanding of the detected heterogeneities, the obtained velocity models were compared with the results of magnetotelluric sounding (MTS) along the Kekemeren and Naryn profiles, running parallel to the 74 and 76 meridians, respectively. We found that in the study region the velocity characteristics and geoelectric properties correlate with each other. The high-velocity high-resistivity anomalies correspond to the parts of the Tarim and Kazakhstan-Junggar plates submerged under the Tien Shan. We revealed that the structure of the Middle Tien Shan crust is conditioned by the presence of the Central Tien Shan microcontinent. It manifests itself as two anomalies lying one below the other: the lower low-velocity low-resistivity anomaly, and the upper high-velocity high-resistivity anomaly. The fault zones, limiting the Central Tien Shan microcontinent, appear as low-velocity low-resistivity anomalies. The obtained features indicate the fluid saturation of the fault zones. According to the revealed features of the Central Tien Shan geological structure, it is assumed that the lower-crustal low-velocity layer can play a significant role in the delamination of the mantle part of the submerged plates.

Download Full-text