New Three-Phase Equilibrium Model (Oil/Gas/Brine) Used To Interpret Production of Liquid Hydrocarbons From a Geopressured Gas Well

The tomographic imaging of process parameters for oil-gas-water three-phase flow can be obtained through different sensing modalities, such as electrical resistance tomography (ERT) and electrical capacitance tomography (ECT), both of which are sensitive to specific properties of the objects to be imaged. However, it is hard to discriminate oil, gas and water phases merely from reconstructed images of ERT or ECT. In this paper, the feasibility of image fusion based on ERT and ECT reconstructed images was investigated for oil-gas-water three-phase flow. Two cases were discussed and pixel-based image fusion method was presented. Simulation results showed that the cross-sectional reconstruction images of oil-gas-water three-phase flow can be obtained using the presented methods.

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Effects of Perforated Flow Tube on the Flow Field of a Blowout Well

SPE Journal ◽

10.2118/179730-pa ◽

2016 ◽

Vol 21 (04) ◽

pp. 1470-1476 ◽

Cited By ~ 1

Author(s):

Ebrahim Hajidavalloo ◽

Saeed Alidadi Dehkohneh

Keyword(s):

Flow Field ◽

Flow Tube ◽

Gas Well ◽

Safety Measures ◽

Team Members ◽

Well Control ◽

Blowout Preventer ◽

New Type ◽

Oil Gas ◽

Simple Flow

Summary When a blowout oil/gas well catches fire, usually a flow tube is used to detach the fire from the wellhead and provide appropriate conditions for operating team members to approach the well and install the blowout-preventer (BOP) cap. Using the flow tube above the wellhead creates powerful suction around the tube that may jeopardize the safety of crew members. To reduce the power of suction around the well, a new perforated flow tube instead of simple flow tube was introduced. To understand the effect of this new type of flow tube, modeling and simulation of the flow field around the blowout well were performed for both simple and perforated types of flow tube with Fluent 6.3.26 (2003) and Gambit 2.3.16 (2003) softwares. Different parameters around the well mouth were compared in both designs. The results showed that using the perforated flow tube decreases the vacuum around the well by 33% compared with the simple flow tubes. Thus, application of the perforated flow tube can be recommended in well-control operations for safety measures.

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Phase Equilibrium of Mg-Nd-Zn System near Mg-Nd Side at 400°C

Materials Science Forum ◽

10.4028/www.scientific.net/msf.873.18 ◽

2016 ◽

Vol 873 ◽

pp. 18-22

Author(s):

Ming Li Huang ◽

Xue Shen ◽

Hong Xiao Li

Keyword(s):

Solid Solution ◽

Phase Equilibrium ◽

Ternary Isothermal Section ◽

Phase Region ◽

X Ray Diffraction ◽

Maximum Solubility ◽

Two Phase ◽

Solubility Range ◽

Three Phase ◽

Equilibrium Alloys

The equilibrium alloys closed to Mg-Nd side in the Mg-rich corner of the Mg-Zn-Nd system at 400°C have been investigated by scanning electron microscopy, electron probe microanalysis and X-ray diffraction. The binary solid solutions Mg12Nd and Mg3Nd with the solubility of Zn have been identified. The maximum solubility of Zn in Mg12Nd is 4.8at%, and Mg12Nd phase can be in equilibrium with Mg solid solution. However, only when the solubility range of Zn in 26at%~32.2at%, Mg3Nd can be in two-phase equilibrium with Mg solid solution. As the results, two two-phase regions as Mg+Mg12Nd and Mg+Mg3Nd and a three-phase region as Mg+Mg12Nd+Mg3Nd in Mg-Nd-Zn ternary isothermal section at 400°C have been identified.

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