An Investigation of PVT Effects on Geochemical Fingerprinting of Condensates From Gas Reservoirs

2009 ◽  
Vol 12 (01) ◽  
pp. 88-95 ◽  
Author(s):  
Ali A. Al-Meshari ◽  
Sunil L. Kokal ◽  
Peter D. Jenden ◽  
Henry I. Halpern
Keyword(s):  
Drop Out ◽  
Gas Reservoirs ◽  
Geochemical Fingerprinting ◽  
Gas Condensates ◽  
Important Concern ◽  
Reservoir Compartmentalization ◽  
Temperature And Pressure ◽  
Potential Fluid ◽  
Bottomhole Pressure

Summary One of the tools used for the characterization of gas reservoirs is the geochemistry of gas condensates. The fingerprinting of gas condensates by gas chromatography, in particular, may provide information regarding reservoir compartmentalization, which can be a major uncertainty at the early-field-appraisal stage. An important concern is the capture of suitable liquid samples. When the flowing bottomhole pressure falls below the dewpoint pressure, for example, condensate will drop out near the wellbore and the captured sample may not be representative of the formation fluid. We conducted two sets of tests simulating the effect(s) of gas-/liquid-phase fractionation on fingerprinting analyses:at different pressures (all below the dewpoint) at reservoir temperature (RT) region in order to simulate dropout of liquids in the near-wellbore area andto investigate the effect of variations in separator temperature and pressure. Geochemical fingerprints obtained on our laboratory-fractionated samples show that condensates obtained from gas wells with flowing bottomhole pressures below dewpoint may not be suitable for compartmentalization studies. Differences in separator pressure and temperature affect the fingerprints of gas condensates, but the effects are small and unlikely to alter conclusions regarding potential fluid-flow barriers. We suggest a number of best practices for the collection and analysis of gas condensates for fingerprinting studies.

Multidisciplinary Approach for Detailed Characterization of Shale Gas Reservoirs: A Netherlands Showcase

2013 ◽  
Author(s):  
Yvonne Anja Schavemaker ◽  
Mart Zijp ◽  
Jan ter Heege ◽  
Susanne Nelskamp ◽  
Johan Ten Veen
Keyword(s):  
Shale Gas ◽  
Multidisciplinary Approach ◽  
Gas Reservoirs ◽  
Detailed Characterization ◽  
Shale Gas Reservoirs

Measurements of real non-Newtonian response for liquid lubricants under moderate pressures

2001 ◽  
Vol 215 (3) ◽  
pp. 223-233 ◽  
Author(s):  
S Bair
Keyword(s):  
Numerical Simulation ◽  
Kinetic Theory ◽  
Simple Shear ◽  
Pressure Dependence ◽  
Shear Stresses ◽  
Current Interest ◽  
Flow Properties ◽  
Power Law Fluid ◽  
Temperature And Pressure

A thorough characterization of all viscous flow properties relevant to steady simple shear was carried out for five liquid lubricants of current interest to tribology. Shear stresses were generated to values significant to concentrated contact lubrication. Two types of non-Newtonian response were observed: shear-thinning as a power-law fluid and near rate-independence. Functions and parameters were obtained for the temperature and pressure dependence of the viscosity and of the time constant for the Carreau-Yasuda equation. Results are consistent with free volume and kinetic theory, but directly contradict many assumptions currently utilized for numerical simulation and for extracting rheological properties from contact measurements.

An Innovative Workflow for the Petrophysical Characterization of Tight Gas Reservoirs in Argentina

2018 ◽  
Author(s):  
Rafael Zambrano ◽  
Daniel Parra ◽  
Lucia Lamberghini ◽  
Pablo Saldungaray ◽  
Laurent Mosse
Keyword(s):  
Tight Gas ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs

scholarly journals AF4-UV-MALS-ICP-MS/MS, spICP-MS, and STEM-EDX for the Characterization of Metal-Containing Nanoparticles in Gas Condensates from Petroleum Hydrocarbon Samples

2018 ◽  
Vol 91 (1) ◽  
pp. 1164-1170 ◽  
Author(s):  
Daniel Ruhland ◽  
Kenneth Nwoko ◽  
Magali Perez ◽  
Jörg Feldmann ◽  
Eva M. Krupp
Keyword(s):  
Petroleum Hydrocarbon ◽  
Gas Condensates ◽  
Icp Ms

scholarly journals Structural characterization of eutectic aqueous NaCl solutions under variable temperature and pressure conditions

2015 ◽  
Vol 17 (21) ◽  
pp. 14054-14063 ◽  
Author(s):  
A.-A. Ludl ◽  
L. E. Bove ◽  
A. M. Saitta ◽  
M. Salanne ◽  
T. C. Hansen ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Variable Temperature ◽  
Structural Evolution ◽  
Temperature And Pressure

We analyze the structural evolution of quenched aqueous NaCl solutions under pressure up to 4 GPa.

Characterization of Microstructures of Volcanic Gas Reservoirs

2014 ◽  
pp. 457-541 ◽  
Author(s):  
Qiquan Ran ◽  
Yongjun Wang ◽  
Yuanhui Sun ◽  
Lin Yan ◽  
Min Tong
Keyword(s):  
Gas Reservoirs ◽  
Volcanic Gas

Inversion of Reservoir Parameters by Ultra-High Temperature and High Pressure CO2 Gas Reservoirs with Nuclear Logging

2021 ◽  
Author(s):  
Hengrong Zhang ◽  
Lizhi Xiao ◽  
Wensheng Wu ◽  
Xinyue Fu ◽  
Shenglin He
Keyword(s):  
Joint Inversion ◽  
Simulation Method ◽  
Inversion Method ◽  
Burial Depth ◽  
Gas Reservoirs ◽  
Co2 Gas ◽  
Carbonate Cement ◽  
Response Equation ◽  
Temperature And Pressure ◽  
The Difference

Abstract The Yinggehai basin is located in the western part of the South China Sea, the burial depth of the Huangliu and Meishan formations in the target layer is close to 4000 meters, the formation temperature is close to 200 degrees Celsius, and the formation pressure is up to 100 MPa. The reservoir is characterized by low porosity-ultra-low permeability, heavy carbonate cement, complex CO2 content, this leads to complex neutron and density logging effects. The solubility of CO2 Above CH4, the solubility change with temperature and pressure is different from CH4, which makes it difficult to identify the CO2 gas layer. In this paper, based on the difference in the physical characteristics of CO2 and CH4, the Boltzmann equation combined with MCNP software was used to simulate the neutron and density logging responses under different CO2 saturations. Environmental factors such as temperature and pressure, carbonate cement, mud content and pores were studied To measure the effect of logging response, the LM inversion method is used to jointly invert CO2 saturation of density and neutron logs. The purpose of the inversion is to reduce the non-uniqueness of the evaluation of porosity and CO2 saturation. By introducing the Levenberg-Marquardt (LM) method, the neutron logging response equation of the porosity, argillaceous content, CO2, CH4 in the rock and the corresponding temperature and pressure is solved, and also the response equation of above parameters to density logging, where porosity and CO2 content are the key parameters, and the calculation results prove the effectiveness of the method by comparing the sampling data. The results show that the accuracy of the estimated CO2 saturation is increased by 10% compared with the conventional interpretation method, and the new simulation method improves the calculation speed several times compared to the MCNP software. The joint inversion method has been successfully applied to field data, which has greatly improved the saturation evaluation results of traditional logging interpretation methods, can be extended to other fields of nuclear logging simulation and inversion.

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