... visible pores which are partly or completely filled with metamorphic minerals. Investigation with NMR, MICP and XCT indicates that these impressive vesicular pores actually occupy less than 20% of total porosity. On the other hand, the signals at shorter T2 are correlated to nano pores (<micrometer...

... make it challenging to characterize the pore structures, porosity, and saturation in deep CBM reservoirs by traditional triple-combo logs. To have a better understanding of deep CBM reservoirs, 2D nuclear magnetic resonance (NMR) logs were performed to characterize the pore structure, porosity...

... of bio-based and biodegradable chelating agents and seawater. The approach involves injecting an acidic chelating agent solution to increase the effective porosity and permeability through chelating-agent-driven enhanced mineral dissolution. After that, alkaline GLDA-containing seawater is used...

...The 29th Formation Evaluation Symposium of Japan, September 12-13, 2024 Application of Bagging Ensemble Machine Learning Models to Predict Porosity of Sandstone Formations Using Well Log Data Kushan Sandunil 1, Ziad Bennour 1, Saaveethya Sivakumar 1, Hisham Ben Mahmud 2 and Ausama Giwelli 3, 4 1...

... and each of them can work well only for a certain type of rock, e.g., the soft sand model (Dvorkin and Nur, 1996) is suitable for unconsolidated sand with high porosity, the contact sand model is more practicable for low cement percentage and high porosity (Dvorkin et al., 1996; Dvorkin, 2020), while...

... geology asia government geologist rock type upstream oil &amp; gas china government reservoir surveillance drilling data acquisition reservoir characterization nmr log analysis japan production control porosity lwd nmr neutron drilling measurement 28th formation evaluation...

... Introduction This paper presents the methodology used to deliver a consistent set of rock types, with petrophysical outputs of porosity, water saturation, and permeability, using a class-based machine learning (CbML) method. This novel tool is designed for summarizing the unique...

... reservoirs in Sichuan Basin are tight carbonate rocks, including both dolomite and calcite lithology. The stratums studied in this paper include Triassic, Permian and Sinian system, deeply buried between 5000m to 8000m. The range of porosity is normally from 2% to 8%, average only around 4% (Wei et al. 2015...

... conventional method dual-water method waxman-smit method initial value old core resistivity measurement data algorithm conductivity accuracy porosity clay mineral The 28th Formation Evaluation Symposium of Japan, September 13-14, 2023 LEVERAGING THE COMPUTING POWER TO EXTRACT THE FULL VALUE FROM...

... basin. The reservoir is highly heterogenous in terms of lithologies, pore structures, porosity and permeability. The core analysis shows a wide variety of mineral assemblages including terrigenous clastic, calcite, dolomite and anhydrite etc. The pore types are mainly intercrystallite pores...

... formation evaluation symposium regime information annual logging symposium reservoir characterization porosity effective-flow fracture university The 27th Formation Evaluation Symposium of Japan, September 14-15, 2022 INTEGRATED FRACTURE ANALYSIS WITH BOREHOLE GEOLOGY, ACOUSTIC AND GEOMECHANICS...

... logging data were extracted by using the data mining and decision tree techniques. Finally, the porosity, density, shaly content, and the ratio of deep and shallow resistivity were found to be sensitive to mercury injection saturations at every mercury injection pressure, and they were chosen as the input...

... porosity (20% +) - Enough sub-sea depth (800 m+, depth at which CO2 becomes supercritical state at the time of injection) Injectivity - Higher permeability, which ensures efficiency for CO2 to be injected at injection pressure below the level of pressure of induced formation fracture Sealing capacity...

... the section has been drilled to total depth (TD). Using LWD tools in this application also reduces well delivery times and costs. A comprehensive logging solution was required to drill the 6-in. reservoir section of a study well. The complex LWD string consisting of gamma ray, resistivity, neutron porosity...

... scenarios to identify gas or CO 2 in reservoirs and determine the gas saturation with case studies (Iglesias et al., 2016; Rose et al., 2017). Simulated log response in a forward formation model of shale and sand, that shows FNXS is sensitive to gas-filled porosity variation, but insensitive to liquid...

... simulation Engineering Modeling &amp; Simulation Upstream Oil &amp; Gas concentration experiment enhanced recovery ion concentration adsorption amount permeability porosity 25th formation evaluation symposium Oil Recovery reaction University waterflooding absolute permeability simulator...

... machine learning classification pretest interpretation reservoir permeability evaluation intrinsic permeability permeability estimation mobility porosity lithofacies Classification lithofacies Japan Fluid Dynamics evaluation effective permeability 25th formation evaluation symposium...

... ABSTRACT The relationship between porosity and permeability is often only marginally useful in production performance prediction, and it is desirable to investigate alternative methodologies to improve permeability estimates. This paper presents a new workflow using logging-while-drilling (LWD...

... and Poupon, 1968 and Segesman and Liu, 1971). It has been widely adopted in the petrophysical society today. However, there was an instance of the gas bearing formation which was not able to be reconciled porosities derived from different tools (e.g. Density, Neutron, and Nuclear magnetic resonance), even...

... ABSTRACT Organic matter exerts a fundamental control on porosity and permeability in organic-rich tight hydrocarbon reservoirs. The complexities of these relationships are not well defined however and may be influenced by a variety of factors including organic matter richness, thermal maturity...