First Application of High Density Fracturing Fluid to Stimulate a High Pressure and High Temperature Tight Gas Producer Sandstone Formation of Saudi Arabia

2009 ◽  
Author(s):  
Kirk Michael Bartko ◽  
Carlos Ivan Arocha ◽  
Tushar Suvra Mukherjee ◽  
Leopoldo Sierra ◽  
John M. Terracina ◽  
...  
Keyword(s):  
High Pressure ◽  
Saudi Arabia ◽  
High Temperature ◽  
High Density ◽  
Tight Gas ◽  
Fracturing Fluid ◽  
Sandstone Formation

The Feasibility for Potassium-Based Phosphate Brines To Serve as High-Density Solid-Free Well-Completion Fluids in High-Temperature/High-Pressure Formations

SPE Journal ◽  
2018 ◽  
Vol 24 (05) ◽  
pp. 2033-2046 ◽  
Author(s):  
Hu Jia ◽  
Yao–Xi Hu ◽  
Shan–Jie Zhao ◽  
Jin–Zhou Zhao
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Oil And Gas ◽  
Pressure Coefficient ◽  
High Density ◽  
Well Drilling ◽  
Well Completion ◽  
Oil And Gas Resources ◽  
Completion Fluids ◽  
High Temperature High Pressure

Summary Many oil and gas resources in deep–sea environments worldwide are often located in high–temperature/high–pressure (HT/HP) and low–permeability reservoirs. The reservoir–pressure coefficient usually exceeds 1.6, with formation temperature greater than 180°C. Challenges are faced for well drilling and completion in these HT/HP reservoirs. A solid–free well–completion fluid with safety density greater than 1.8 g/cm3 and excellent thermal endurance is strongly needed in the industry. Because of high cost and/or corrosion and toxicity problems, the application of available solid–free well–completion fluids such as cesium formate brines, bromine brines, and zinc brines is limited in some cases. In this paper, novel potassium–based phosphate well–completion fluids were developed. Results show that the fluid can reach the maximum density of 1.815 g/cm3 at room temperature, which makes a breakthrough on the density limit of normal potassium–based phosphate brine. The corrosion rate of N80 steel after the interaction with the target phosphate brine at a high temperature of 180°C is approximately 0.1853 mm/a, and the regained–permeability recovery of the treated sand core can reach up to 86.51%. Scanning–electron–microscope (SEM) pictures also support the corrosion–evaluation results. The phosphate brine shows favorable compatibility with the formation water. The biological toxicity–determination result reveals that it is only slightly toxic and is environmentally acceptable. In addition, phosphate brine is highly effective in inhibiting the performance of clay minerals. The cost of phosphate brine is approximately 44 to 66% less than that of conventional cesium formate, bromine brine, and zinc brine. This study suggests that the phosphate brine can serve as an alternative high–density solid–free well–completion fluid during well drilling and completion in HT/HP reservoirs.

scholarly journals Gas-water relative permeability measurement of high temperature and high pressure tight gas reservoirs

2015 ◽  
Vol 42 (1) ◽  
pp. 92-96 ◽  
Author(s):  
Jianlong FANG ◽  
Ping GUO ◽  
Xiangjiao XIAO ◽  
Jianfen DU ◽  
Chao DONG ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Relative Permeability ◽  
Tight Gas ◽  
Permeability Measurement ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs

Extending Well Productive Life with Acid Re-fracturing in a High Pressure/High Temperature Tight Gas/Condensate Carbonate Reservoir

2011 ◽  
Author(s):  
Mir Md. Rezaul Kabir ◽  
Qasem M. Dashti ◽  
Jai Ram Singh ◽  
San Prasad Pradhan ◽  
Ikhsan Nugraha ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Carbonate Reservoir ◽  
Gas Condensate ◽  
Tight Gas ◽  
Productive Life ◽  
High Pressure High Temperature

scholarly journals Diffusion of High-Temperature and High-Pressure CH4 Gas in SiO2 Nanochannels

2021 ◽  
Vol 9 ◽  
Author(s):  
Shuheng Cui ◽  
Jianfeng Fu ◽  
Minling Guo ◽  
Zhixiang Zhao ◽  
Chengzhen Sun ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Transport Properties ◽  
Longitudinal Direction ◽  
Channel Height ◽  
Tight Gas ◽  
Potential Wells ◽  
Confining Effect ◽  
Perpendicular Diffusion ◽  
Dynamics Simulations

Fundamental understandings of nanoconfined methane (CH4) are crucial to improving the exploitation of tight gas. In this study, diffusivity, one of the key transport properties of high-temperature and high-pressure methane gas, is examined under confinement in the silica nanochannels by using molecular dynamics simulations by employing Einstein diffusion equation. It was found that the diffusivity of nanoconfined methane is obviously anisotropic, namely, the perpendicular diffusion coefficient is lower than that in the longitudinal direction. The anisotropic diffusivity of nanoconfined methane is attributed to the restricted effect of potential interactions from the atoms of walls, which is verified by analyzing the diffusivity of methane molecules in the potential wells with Lagrangian dynamics. The diffusion coefficients of nanoconfined methane decrease with the increase of atomic potentials in the wall, which can be explained by the density distributions of methane in the nanochannels. Furthermore, we reveal the dependence of the diffusivity of nanoconfined methane on the channel height and confining effect of the wall on the diffusivity of methane molecules. The obtained results can provide a molecular insight into the transport properties of methane confined in nanospace and a theoretical guidance for the efficient extraction of tight gas.

Successful Application of Platform Based Hydraulic Fracturing in High-Pressure/High-Temperature Tight Gas Sand in North Malay Basin

2014 ◽  
Author(s):  
Sherif Abdelaziz ◽  
Chidi Ogueri ◽  
Leslie Jane Armentrout ◽  
Zaimi Salleh ◽  
Mariano Fernandez ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Hydraulic Fracturing ◽  
Tight Gas ◽  
High Pressure High Temperature
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