The climate debate has made CO2 one of the most talked about substances. In the oil and gas industry, CO2 has always been important. Most reservoir fluids contain CO2, some in large concentrations, and CO2 is an efficient injection gas for EOR purposes. The properties of the hydrocarbon components are the same in a CO2 …
Reservoir fluid characterization is no longer limited to the classical steps of splitting the plus fraction into carbon number fractions, lumping of C7+ fractions, and assignment of EoS model parameters to the pseudo-components. An EoS model must be applicable not only in reservoir engineering calculations, but also in flow assurance and process calculations. Produced reservoir …
The two first TechTalks in the series on Fluid Characterization dealt with characterization of single petroleum reservoir fluids. This TechTalk outlines How to make a common equation of state (EoS) model applicable for multiple fluids How to add a new fluid to an existing EoS model How to evaluate whether a series of plus fluid …
Taking a representative bottom hole fluid sample is a tedious and therefore also an expensive operation. Before a clean fluid sample can be taken, the well must be flooded for some time to remove the oil-based mud (OBM) in the near well bore area. Subsequently, a stable flow must be established from the cleaned well. …
#20 Dealing with Mud Contaminated Samples in EoS Modeling Read More »
Calsep will over the next couple of months post a series of TechTalks about simulation of fluid properties covering: Basic fluid characterization, Mud contaminated samples, Common EoS, Fluids with water, and CO2 rich fluids. This first TechTalk is about characterization of a single clean reservoir fluid composition. Fluid characterization was a hot topic in the …
Introduction PVTsim has a comprehensive list of pure components covering not only oil and gas components, but also water, hydrate inhibitors and salts. Simulations may still be needed for mixtures with components that are not in the pure component database that comes with a PVTsim installation. In such cases, the user has the option to …
With the digital transformation well underway in the upstream oil and gas industry, standardized data formats are needed to support the exchange of data and other information while ensuring a high level of trust in the information shared. Anyone who has worked with PVTsim or other PVT software knows how tedious it is to enter …
Introduction A multiphase meter (MPM) is a cost-effective solution for reservoir fluid allocation. The meter provides gas and oil flowrates of a well stream at actual conditions. To take full benefit of multiphase meter readings, these meter flowrates must be converted to produced (Stock) oil and gas flowrates. Traditionally allocation calculations have been carried out …
The thermal conductivity is an important parameter in engineering calculation. It enters into models and correlations for heat exchange in pipe and process equipment. The thermal conductivity (λ) is defined as where q is the heat flow per unit area and dT/dx is the temperature gradient in the direction of the heat flow. For oil …
Just 10 years ago, the oil industry primarily saw CO2 as a gas that could potentially be used to enhance the oil recovery through injection into oil reservoirs. CO2 is relatively miscible with heavy hydrocarbons and a miscible drive can develop at moderate reservoir pressures. Today, much focus on CO2 has shifted to Carbon Capture Storage (CCS). It …
