research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
Analytical Model for Detection the Tilt in Originally Oil Water Contacts

Author: Jalal Abdulwahid Al-Sudani جلال عبد الواحد
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2014 Volume: 15 Issue: 3 Pages: 51-60
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Many carbonate reservoirs in the world show a tilted in originally oil-water contact (OOWC) which is required a special consideration in selection the capillary pressure curves and an understanding of reservoir fluids distribution while initialization the reservoir simulation models. An analytical model for predicting the capillary pressure across the interface that separates two immiscible fluids has been derived from reservoir pressure transient analysis. The model reflects the entire interaction between the reservoir-aquifer fluids and rock properties measured under downhole reservoir conditions. This model retains the natural coupling of oil reservoirs with the aquifer zone and treats them as an explicit-region composite system; thus the exact solutions of diffusivity equation can be used explicitly for each region. The reservoir-aquifer zones are linked by a capillary transition zone that reflects the pressure difference across the free water level. The principle of superposition theorem has been applied to perform this link across the free water level to estimate the reflected aquifer pressure drop behavior that is holds the fluid contacts in their equilibrium positions. The results of originally oil water contact positions generated by the proposed model have been compared with data obtained from a carbonate oil field, the results given by the model show full agreement with the actual field data.


Article
Migration of Benzene as Light non-aqueousPhase in the Stratified Soil under Unsaturated Condition

Author: Huda Mahdi Madhloom
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2017 Volume: 25 Issue: 1 Pages: 266-275
Publisher: Babylon University جامعة بابل

Loading...
Loading...
Abstract

A COMSOL Multiphysics software depended on finite element numerical solution is used for prediction the spatially and temporally propagation of the benzene front as non-aqueous phase liquid through the stratified soil consisted of clay and Kerbala’s sand as domain (1.3*2) m. The variation of many parameters such as capillary pressure, benzenedistribution, trans missive properties of the soil.Thedegree of saturation as a function of capillary pressure and relative permeability during unsaturated conditions were determined. The results showed that the benzene front in the Kerbala’s sand with presence of clay retained a regular, circular shape at the initial stage of the spill, shortly after that it become ellipsoid as it was advancing. The maximum saturation occurred below the source of the contaminant during infiltration stage. All analysis showed that the presence of clay layer controls the vertical movement of NAPLs in heterogeneous porous medium.

تم استخدام برنامج كمسول الذي يعتمد على العناصر المحدده كحل عددي لمعادله انتشار ملوث البنزين في تربه متعدده الطبقات في المنطقه الغير المشبعه.تم اعداد نموذج رياضي يصف حركه الملوثات السائله الأخف من الماء المتسربه من خزانات الوقود الى الطبقه السطحيه من التربه ورصد شكل جبهة تقدم الملوث . تم حساب المعاملات رطوبه التربه ومعامل النفاذيه ومعامل التشبع الفعال وكيفيه تغايرها مع عمق التربه والضغط الشعري . المواد المستخدمة تربه طبيعيه غير متجانسه الرمل والطين كوسط مسامي، والبنزين كملوث. أظهرت نتائج التحليل العددي للعمود التربه (1.3*2) م أن الجبهة الملوث احتفظت بشكل دائري منتظم في المرحلة الأولى من التسرب.تم ايجاد التغاير بين درجه التشبع مع الضغط الشعري و النفاذيه لتربه سطحيه غير مشبعه.

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2017 (1)

2014 (1)