- 行业: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
- Company Profile:
An oil-continuous foam that contains dispersed gas bubbles produced at the wellhead from heavy oil reservoirs under solution gas drive. The nature of the gas dispersions in oil distinguishes foamy oil behavior from conventional heavy oil. The gas that comes out of solution in the reservoir does not coalesce into large gas bubbles nor into a continuous flowing gas phase. Instead it remains as small bubbles entrained in the crude oil, keeping the effective oil viscosity low while providing expansive energy that helps drive the oil toward the producing well. Foamy oil accounts for unusually high production in heavy oil reservoirs under solution-gas drive.
Industry:Oil & gas
An oil recovery enhancement method using sophisticated techniques that alter the original properties of oil. Once ranked as a third stage of oil recovery that was carried out after secondary recovery, the techniques employed during enhanced oil recovery can actually be initiated at any time during the productive life of an oil reservoir. Its purpose is not only to restore formation pressure, but also to improve oil displacement or fluid flow in the reservoir. <br><br>The three major types of enhanced oil recovery operations are chemical flooding (alkaline flooding or micellar-polymer flooding), miscible displacement (carbon dioxide (CO<sub>2</sub>) injection or hydrocarbon injection), and thermal recovery (steamflood or in-situ combustion). The optimal application of each type depends on reservoir temperature, pressure, depth, net pay, permeability, residual oil and water saturations, porosity and fluid properties such as oil API gravity and viscosity. <br><br>Enhanced oil recovery is also known as improved oil recovery or tertiary recovery and it is abbreviated as EOR.
Industry:Oil & gas
An oil or gas accumulation that has matured to a production plateau or even progressed to a stage of declining production. Operating companies seek to extend the economic producing life of the field using cost-effective, low-risk technologies. Stimulation or refracturing operations, completing additional zones, and installing artificial lift equipment are a few technologies commonly applied in brownfields before any drilling options are attempted.
Industry:Oil & gas
An oil and gas lease that expires after a specified period of time, regardless of whether oil, gas and/or other minerals are being produced.
Industry:Oil & gas
An oil and gas lease wherein the bonus consideration is paid at the signing of the lease. However, this lease becomes effective only after the expiration or termination of an existing lease on the tract of land.
Industry:Oil & gas
An occasion when a governmental body offers exploration acreage for leasing by exploration and production companies, typically in return for a fee and a performance or work obligation, such as acquisition of seismic data or drilling a well. Exploration licenses are initially of limited duration (about 5 years) after which there might be a requirement to return half or more of the licensed acreage to the state. If hydrocarbons are discovered, a separate production license or production-sharing agreement is usually drawn up before development can proceed.
Industry:Oil & gas
An oil and gas lease in which delay rentals for the entire primary term are paid in advance with the bonus consideration.
Industry:Oil & gas
An item of pressure-control equipment often fitted to the wellhead during well-intervention operations on live wells. Most commonly associated with coiled tubing operations, the shear-seal BOP is a ram-type preventer that performs the dual functions of shearing or cutting the tubing string and then fully closing to provide isolation or sealing of the wellbore. Shear-seal BOPs are most commonly used in offshore or high-pressure applications where an additional contingency pressure barrier is required.
Industry:Oil & gas
An obstruction in the pipeline, composed of asphaltenes, hydrates, waxes, scale and sand deposited on the internal wall of the pipeline forming a barrier to the normal flow of fluids. The conditions for blockage formation are mainly encountered in deepwater operations (low temperature and high pressure).
Industry:Oil & gas
An isolated section of reservoir in which the pressure has dropped below that of adjacent zones or the main body of the reservoir formation.
Industry:Oil & gas
