Cold Heavy Oil Development: Learn from the Past, Plan for the Future

Othman, Tg Rasidi Tg; Rahman, M Izzat A; Emam, Masoud; Ramli, Anis Salwa; Sulleh, Shahida; Anasir, Nadiah; Tewari, Raj Deo; Ahmed, S. Ansar

doi:10.2118/165449-ms

Cited by 3 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding development plans, the well network can be enhanced by considering the distribution of remaining oil, which can help adjust the distribution and improve flow efficiency . As for development technology, microbial system oil recovery primarily reduces crude oil viscosity and oil–water interfacial tension by altering the properties of crude oil through metabolic products that lead to efficient percolation . The hot fluid system for oil recovery mainly improves the flow efficiency by heating crude oil, reducing its viscosity, dissolving and expanding it, and also maintaining formation pressure. , The polymer-based displacement control system enhances sweep efficiency and increases the oil–water contact area by obstructing high permeability channels, leading to efficient oil displacement .…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Pressure Difference Variations on Heavy Oil Start-Up and Percolation Effects

Liu,

Yang,

et al. 2024

ACS Omega

View full text Add to dashboard Cite

To investigate the influence of pressure difference changes on the micro start-up and percolation of heavy oil, a micro visualization displacement device was used to characterize the startup time and oil−water percolation state of heavy oil. The mechanism of different pressure differences, as well as the frequency and amplitude of pressure difference changes, on the start-up and percolation balance of heavy oil was clarified. The results indicate that high-pressure difference and pressure difference changes can reduce the start-up time of heavy oil. A reasonable frequency of pressure difference changes effectively promotes the balance between positive and negative pressure shear and fluid−solid response. Large pressure difference changes can effectively break the viscous and adsorption resistance during heavy oil start-up; reasonable pressure difference can exert the synergistic effect of pressure difference and infiltration, achieving a balance between the water wave and the initial water film thickening process as well as the continuous percolation process of wire drawing, oil droplets, and oil columns during the mediumto-high water content period; a reasonable frequency of pressure difference variation during the high water content period can promote the superposition of inertia effects at the oil−water interface and break the balance of the oil−water interface. A large amplitude of pressure difference variation is beneficial for the strong deformation of the oil−water interface and the shear dislocation peeling of the oil−solid interface. Therefore, a relatively high amplitude of pressure difference variation and a reasonable frequency of pressure difference variation, as well as the synergistic effect of pressure difference and infiltration, are the keys to effectively start heavy oil and improving oil recovery during the ultrahigh water-cut period.

show abstract

Section: Introductionmentioning

confidence: 99%

Mechanism of Pressure Difference Variations on Heavy Oil Start-Up and Percolation Effects

Liu,

Yang,

et al. 2024

ACS Omega

View full text Add to dashboard Cite

show abstract

Enhanced Oil Recovery Methods

Romero‐Zerón

2016

Exploration and Production of Petroleum and Natural Gas

View full text Add to dashboard Cite

Oil and natural gas remain the dominant components of the worldwide energy system. The International Energy Agency (IEA) predicts that global energy demand will increase by at least 30 % over the next 20 years. It is expected that 99.7 million barrels per day will be needed in 2035. Therefore, the world economy depends on the availability of oil and natural gas resources, advances in oil production technologies, the development of alternative energy sources, and the existence of reliable energy supply routes. At present, the average worldwide oil recovery factor after primary and secondary oil recovery is in the order of one third of the total original-oil-in-place depending on the reservoir characteristics; hence, significant amounts of oil are left in the formation. To achieve oil recovery factors higher than 30 % from mature reservoirs, it is necessary to implement enhanced oil recovery (EOR) processes. Consequently, EOR methods will become increasingly important in the future. This chapter presents a brief description of the most common EOR processes as well as information on recent developments and field applications.

show abstract

Quantification of Phase Behaviour and Physical Properties of Alkane Solvents/CO2/ Water/Heavy Oil Systems under Equilibrium and Nonequilibrium Conditions

Yang

Huang

2022

Day 1 Wed, March 16, 2022

View full text Add to dashboard Cite

The hybrid steam-solvent injection has been considered as a promising technique for enhancing heavy oil/bitumen recovery, while its main mechanisms including the heat transferred and dissolution of solvents (e.g., C3H8, C4H10, CO2, N2, and DME) into heavy oil/bitumen to reduce its viscosity and swell it are closely related to the phase behaviour of the solvents/water/heavy oil systems. To allow the seamless integration with the existing reservoir simulators, the traditional cubic equations of state (i.e., SRK EOS and PR EOS) have been modified and improved to accurately quantify the phase behaviour and physical properties of the aforementioned systems under equilibrium and nonequilibrium conditions. Firstly, a huge database has been built to develop the corresponding alpha functions by minimizing the deviation between the measured and calculated vapour pressures for water as well as nonhydrocarbon and hydrocarbon compounds available from the public domain. Such obtained alpha functions are further validated with enthalpy of vaporization for pure substances, and then the reduced temperature has been optimized and the eccentric factor has been redefined. Finally, a pressure-implicit strategy has been developed to optimize the binary interaction parameters (BIPs) by treating heavy oil as one pseudocomponent (PC) or multiple PCs. Also, the contributions of each solvent to the aforementioned systems have been compared and analyzed within a consistent and unified framework. In addition to new alpha functions for hydrocarbons and water, respectively, the reduced temperature is found to have its optimum value of 0.59 for the two equations of state (EOSs), while 0.60 is recommended for practical use. Such improved EOSs have been further employed to reproduce the experimentally measured multiphase boundaries (or pseudo-bubble-point pressures), density, viscosity, (mutual) solubility, and preferential mass transfer for the aforementioned mixtures under equilibrium and nonequilibrium conditions. The swelling effect for the heavy oil can be enhanced due to the addition of C3H8 and/or C4H10 or their mixtures into the CO2 stream. Due to the existence of water, isenthalpic flash leads to more accurate quantification of multiphase boundaries and physical properties for the hybrid solvent-thermal processes. Each component of a binary or ternary gas mixture is found to diffuse preferentially into heavy oil at high pressures and elevated temperatures in the absence and presence of porous media, while each of them is found to exsolve differently from gas-saturated heavy oil under nonequilibrium conditions.

show abstract

Cold Heavy Oil Development: Learn from the Past, Plan for the Future

Cited by 3 publications

References 3 publications

Mechanism of Pressure Difference Variations on Heavy Oil Start-Up and Percolation Effects

Mechanism of Pressure Difference Variations on Heavy Oil Start-Up and Percolation Effects

Enhanced Oil Recovery Methods

Quantification of Phase Behaviour and Physical Properties of Alkane Solvents/CO2/ Water/Heavy Oil Systems under Equilibrium and Nonequilibrium Conditions

Contact Info

Product

Resources

About