What is waterflooding in oil and gas?

What is waterflooding in oil and gas?

oil recovery practiced secondary recovery method is waterflooding. After being treated to remove any material that might interfere with its movement in the reservoir, water is injected through some of the wells in an oil field. It then moves through the formation, pushing oil toward the remaining production wells.

How is Ooip calculated?

The OOIP is calculated by this equation is in reservoir barrels (RB), and the other parameters are defined as follows: $e = effective porosity (fraction), h = pay height, ft, and Sw = water saturation (fraction).

How do you calculate recovery factor?

Recovery factor (RF) = over all proportion of oil expected to be recovered from the reservoir = production + proven and probably reserves/ Stock Tank Oil Initially In Place (STOIIP) or Oil Originally In Place (OOIP). RF = RFp + RFs + EOR + proven and probably reserves.

What is sweep efficiency?

1. n. [Enhanced Oil Recovery] A measure of the effectiveness of an enhanced oil recovery process that depends on the volume of the reservoir contacted by the injected fluid.

What is EOR process?

Enhanced oil recovery (EOR), also known as “tertiary recovery,” is a process for extracting oil that has not already been retrieved through the primary or secondary oil recovery techniques.

What is waterflooding in drilling?

In the oil industry, waterflooding or water injection is where water is injected into the oil reservoir, to maintain the pressure (also known as voidage replacement), or to drive oil towards the wells, and thereby increase production.

What Ooip stand for?

From Wikipedia, the free encyclopedia. Oil in place (OIP) (not to be confused with original oil-in-place (OOIP)) is a specialist term in petroleum geology that refers to the total oil content of an oil reservoir.

What is volumetric equation?

Volumetric is a method to estimate fluid in reservoir based on volume of pore space in a rock and water saturation. Volume of Oil Initially In Place (OIIP) To estimate oil initially volume in place, the following formula is a volumetric calculation for oil.

What is the definition of a field recovery factor?

1. n. [Enhanced Oil Recovery] The recoverable amount of hydrocarbon initially in place, normally expressed as a percentage. The recovery factor is a function of the displacement mechanism. An important objective of enhanced oil recovery is to increase the recovery factor.

What is volumetric sweep efficiency?

Volumetric sweep efficiency is defined as being the fraction of the floodable pore volume swept or contacted by the injected water. Volumetric sweep efficiency is a combination of areal sweep and vertical sweep efficiencies as illustrated in Equation 1.

What is sweep water?

The State Water Efficiency and Enhancement Program (SWEEP) provides financial assistance in the form of grants to implement irrigation systems that reduce greenhouse gases and save water on California agricultural operations.

What is the difference between IOR and EOR?

In world oil-and-gas practice, two different terms are in use: EOR (enhanced oil recovery) meaning intensive, forcible methods; and IOR (improved oil recovery) – advanced and moderate methods.

What are the parameters of a waterflooding simulation?

A water injector with a constant injection rate and an oil producer with a constant bottomhole pressure are placed at two corners of the reservoir, as shown in Fig. 8.11. Table 8.1 summarizes the basic parameters for the simulation.

How is the oil phase of waterflooding simulated?

In this case study, the oil phase is composed of only one hydrocarbon component (C 20 ), and a two-phase (water and oil) flow is simulated. Corey-type relative permeability curves are used, and the parameters for the relative permeability curves are also provided in Table 8.1. The capillary effect is not considered in this study. Figure 8.11.

How is waterflooding used in the oil industry?

In waterflooding, water is injected into one or more injection wells while the oil is produced from surrounding producing wells spaced according to the desired patterns. There are many different waterflood patterns used in the industry, the most common of which are illustrated in Figure 1 . Figure 1 Flooding patterns.

What are the variables that affect waterflooding recovery?

Waterflooding recovery depends on a number of variables, and the ones that usually have the greatest impact are as follows: Oil saturation at the start of waterflooding Residual oil saturation Connate water saturation Free gas saturation at the start of water injection Water floodable pore volume