Objectives: Considering the rarity of umbilical cord prolapse (UCP) and lack of accurate data about the risk factors and health outcomes, we aimed to evaluate cases of cesarean section (CS) due to UCP in order to reduce treatment costs and provide information about the mortality and morbidity associated with this condition.Patients & Methods: Of 35,259 cases of CS performed in four hospitals du...

This paper was selected for presentation by an SPE Program Committee following review of information contained in a proposal submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The material, as presented, does not necessarily reflect any position of the Society of Petroleum ...

The main purpose of this investigation is to study the effect of near miscible CO2 injection in different porous mediums on both lab and field scales. This effect can be traced by the change of two-phase gas-oil relative permeability curves. In this work, the experiments have been performed on three rock types (i.e. sandstone, dolomite, and artificial fractured sandstone) based on an incrementa...

Abstract A significant behavior of carbonate reservoirs is poor correlation between porosity and permeability. With the same porosity, permeability can vary by three orders magnitude or more. An accurate estimation for reservoir has been a challenge many years. The aim this study was to establish relationships pore throat, This indicates that throat radius corresponding mercury saturation 20% (...

Permeability prediction problem has been examined using several methods such as empirical formulas, regression analysis and intelligent systems especially neural networks and fuzzy logic. This study proposes an improved and novel model for predicting permeability from conventional well log data. The methodology is integration of empirical formulas, multiple regression and neuro-fuzzy in a commi...

the main purpose of this investigation is to study the effect of near miscible co2 injection in different porous mediums on both lab and field scales. this effect can be traced by the change of two-phase gas-oil relative permeability curves. in this work, the experiments have been performed on three rock types (i.e. sandstone, dolomite, and artificial fractured sandstone) based on an incrementa...

The Zubair reservoir in the Abu-Amood field is considered a shaly sand south of Iraq. geological model created for identifying facies, distributing petrophysical properties and estimating volume hydrocarbon place. When data processing by Interactive Petrophysics (IP) software completed estimated permeability using hydraulic unit method then, three main steps are applied to build model, begins w...

Least squares method (LSM) is an accurate and rapid method for solving some analytical and numerical problems. This method can be used to estimate the average reservoir pressure in well test analysis. In fact, it may be employed to estimate parameters such as permeability (k) and pore volume (Vp). Regarding this point, buildup, drawdown, late transient test data, modified Muskat method, interfe...

Tight reservoir means reservoir of low porosity and low permeability. Many tight formations are extremely complex, produced from multiple layers with different permeability that is often enhanced by natural fracturing. The complicity of these reservoirs is attributed to a) Low porosity and low permeability reservoir, b) The presence of clay minerals like illite, kaolin and micas in pores, c) Th...