Abstract
A 2D geological model for Mauddud Formation in the Badra oil field is built using Rockworks 16 software. Mauddud Formation produces oil from limestone units; it represents the main reservoir in the Badra oil field. Six wells (BD-1, BD-2, BD-4, BD-5, P-15, and P-19) are selected to build facies and petrophysical (Porosity and Water saturation) models. Wells data are taken from the core and cutting samples and studied through the microscopic. The petrophysical data (effective porosity and water saturation) are derived from computer processes interpretation results that are calculated by using Interactive Petrophysics software. The 2D models are built to illustrate the vertical and horizontal distribution of petrophysical properties between wells of the Badra oil field. The facies model of Mauddud Formation shows the dominance of open marine facies in the upper and middle parts of the formation, whereas mid-ramp facies occupies the lower part. The shoal facies represents approximately continuous units among wells of study. According to the results of petrophysical models, the effective porosity increases towards the wells which occupy a higher structural depth while the water saturation increases toward the wells which occupy the lower structural depths. The hydrocarbons are mainly accumulated in the high structure parts of the Badra field within Mauddud Formation.
Highlights
Mauddud Formation includes important carbonate reservoirs in the Arabian plate region (Cross et al, 2010)
The depth of each facies association and its thickness, color and type are entered by the chosen I-data option
Point data (P-Data): These data include single depth and multiple columns of measurements. These values belong to effective porosity (PHE) and water saturation (Sw) values
Summary
Mauddud Formation includes important carbonate reservoirs in the Arabian plate region (Cross et al, 2010). The formation has regional distribution and thickness all over the Arabian plate (Sadooni and Al-Sharhan, 2003). In central Iraq, Mauddud Formation produces oil in Badra oil field from limestone units. There are many ways to create reservoir models and the process followed will illustrate the distribution of facies, Iraqi Geological Journal. Geological modeling is an applied science of creating a computerized representation of portions of earth′s crust, especially the oil and gas field. The aim of this paper is to build 2D geological models for six wells of Mauddud Formation in the Badra oil field. The 2D geological models include the facies and the petrophysical (effective porosity and water saturation) models
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