Reconciling Log-Derived Water Saturation and Saturation-Height Function Results through Resistivity Modeling, Core-Log Integration and Image Log Data: A Case Study from Deepwater Gulf of Mexico

2015 ◽  
Author(s):  
Javier Miranda ◽  
Michael Rabinovich ◽  
Jeffry Hamman ◽  
Maryam Mousavi
Keyword(s):  
Gulf Of Mexico ◽  
Water Saturation ◽  
Height Function ◽  
Log Data ◽  
Resistivity Modeling

Developing a reliable height function from the J-Leverett parameters to populate water saturation: a case study

2015 ◽  
Vol 55 (1) ◽  
pp. 291
Author(s):  
Bert Filippi ◽  
Bahman Joodi ◽  
Mohammad Sarmadivaleh
Keyword(s):  
Extreme Values ◽  
Water Saturation ◽  
Dynamic Modelling ◽  
Free Water ◽  
Height Function ◽  
Clay Content ◽  
The North ◽  
The North Sea ◽  
Capillary Pressures

Populating water saturation is a critical step in dynamic modelling. This work introduces a different height function that equates directly with the Leverett-J formula. In doing so, the model initialises under quiescent conditions without the need for end-point scaling. The resulting water saturation is a function of permeability, porosity, clay volume and height above the free water level. The Vcl—or clay content—is an important feature in this formulation because it compensates between extreme values of permeability and porosity. This peer-reviewed paper describes how a single height function was sufficient to match the log-derived water saturation for all wells in the Coracle sand of the Surprise Field in the North Sea. The process involved fitting a simple height formula, with the least possible parameters, to the J-function calculated from all the special core analysis (SCAL) data. These parameters were then tuned to match the log-derived water saturation. This technique was subsequently used in other fields where a single height function, which honoured the measured capillary pressures, accurately matched water saturation in all of the wells.

scholarly journals INTEGRATED AVO, ELASTIC SEISMIC INVERSION AND PETROPHYSICAL ANALYSIS FOR RESERVOIR CHARACTERIZATION: A CASE STUDY OF GAS FIELD, SOUTH SUMATERA BASIN

2018 ◽  
Vol 3 (1) ◽  
pp. 7-14
Author(s):  
Abdul Haris ◽  
Ressy Sandrina ◽  
Agus Riyanto
Keyword(s):  
Water Saturation ◽  
Seismic Inversion ◽  
Elastic Parameter ◽  
Well Log ◽  
Gas Field ◽  
Log Data ◽  
Petrophysical Analysis ◽  
Avo Analysis ◽  
Shale Volume

Integrated Amplitude Versus Offset ( AVO), elastic seismic inversion and petrophysical analysis have been successfully applied to estimate the elastic parameters of the reservoir for a case study of the gas field in south Sumatera basin. This paper aims to have better understanding the petrophysical properties of the reservoir. The petrophysical analysis was carried out by performing routine formation evaluation that includes calculation of shale volume, porosity, and water saturation of basic well log data. Sensitivity analysis was conducted to evaluate the sensitivity parameters of the log for changing in lithology, porosity, and fluid content in the reservoir. For completing the availability of elastic parameter from well log data, shear wave logs were derived from Castagna’s mudrock line relationship. Further, P-impedance, S-impedance, VpVs ratio, LambdaRho (λρ), MuRho (μρ) and density(ρ) were then calculated through a Lambda-Mu-Rho (LMR) transformation. Prior to performing AVO analysis and elastic seismic inversion, super gather technique was applied to improve the reliability of pre-stack seismic data. Elastic seismic inversion was carried out to extract the lateral elastic properties to capture lithology and fluid changes in the reservoir. In addition, AVO analysis of pre-stacked data was applied to identify hydrocarbon-bearing sandstone at target zone. The petrophysical analysis shows that porosity versus density crossplot is able to distinguish sand-shale based on 34% shale volume cutoff, while LMR crossplot is able to delineate hydrocarbon zone at water saturation value under 65%. The predicted lateral elastic parameter shows slightly higher value compare to overlying layer.

A PREVIEW TO THE DIGITAL COMPONENT IN THE NEW WIRELINE FORMATION TESTING ERA: GULF OF MEXICO CASE STUDY

2020 ◽  
Author(s):  
German Garcia ◽  
◽  
Hadrien Dumont ◽  
Simon Edmundson ◽  
Chris Babin ◽  
...  
Keyword(s):  
Gulf Of Mexico

Technical advances in pulsed-neutron interpretation for cased-hole logging: Physics, interpretation, and log examples

2015 ◽  
Vol 3 (1) ◽  
pp. SA159-SA166 ◽  
Author(s):  
Larry Jacobson ◽  
Venkataraman Jambunathan ◽  
Zhipeng Liu ◽  
Weijun Guo
Keyword(s):  
Data Quality ◽  
Phase Formation ◽  
Water Saturation ◽  
Log Data ◽  
Gas Saturation ◽  
Fluid Analysis ◽  
Three Phase ◽  
Technical Advances ◽  
Interpretation Process ◽  
Pulsed Neutron

Recently developed multidetector pulsed-neutron tools (MDPNTs — a term describing a pulsed-neutron tool with at least three detectors) can provide three-phase formation fluid analysis in cased wells. These tools are 43 mm (1 11/16 in.) or 54 mm (2 1/8 in.) in diameter and can be logged in or below most tubing sizes. We reviewed traditional oil- and water-saturation techniques as well as indirect gas-saturation techniques, and we compared them with recently developed direct gas-saturation techniques, now available from MDPNTs. A log example developed the data verification and interpretation process. The interpretation process was divided into two parts: First, we verified the log data quality and second, we applied a newly developed gas model to the log data providing gas saturation without any reliance on the previously determined oil and water saturation.

Gulf of Mexico's First Application of Riserless Mud Recovery for Top-hole Drilling - A Case Study

2010 ◽  
Author(s):  
John Hall Cohen ◽  
Jermund Kleppe ◽  
Tore Grønås ◽  
Thomas Baxter Martin ◽  
Torstein Tveit ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Hole Drilling
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