## How do you calculate Stoiip?

Table of Contents

Both estimates rely on the volumetric equation for calculating stock tank oil originally in-place (STOOIP), in barrels, is as follows: STOOIP = 7758 (bbls/acre-ft) x Oil Reservoir Area (acres) x Average Net Pay Thickness (ft) x Porosity (fraction) x Oil Saturation (fraction) x Oil Shrinkage (1/Bo)

**What is Stoiip stand for?**

stock tank original oil-in-place

Oil-in-place is also known as stock tank original oil-in-place (STOOIP) or stock tank oil-initially-in-place (STOIIP), referring to the oil in place before the commencement of production.

### What is gas place?

Original oil in place (OOIPoriginal oil in place) and original gas in place (OGIPoriginal gas in place) refer to the total volume of hydrocarbon stored in a reservoir prior to production.

**How are oil estimates calculated?**

The estimating of original oil-in-place is based on calculations using the volumetric method or the material balance method when sufficient factual data are available concerning reservoir rock, fluid properties, reservoir limits, and production performance.

## What is Sophih?

Hydrocar Ft (SOPHIH) – Hydrocarbon Feet is the summation of each sample interval multiplied by each Porosity/(Condition 1) times 1.0 – Water Sat/(Condition 2) passing all cutoff criteria. Requires porosity and water saturation curves.

**How do you calculate gas in place?**

5.2: Estimation of Original Gas In-Place, OGIP, Using the Volumetric Method

- Equation 5.01a. or, equivalently (after applying the Saturation Constant): G=Vgrv(¯hn/¯hg)ˉϕ(1−¯Swι)¯Bgι
- Equation 5.01b. Where: G is the original-gas-in-place of the reservoir, SCF.
- Equation 5.02. Where: Vgrv is the gross rock volume, ft.

### What is Giip in oil and gas?

an estimated measure of the total amount of gas contained in a reservoir and, as such, a higher figure than Recoverable Gas. May also be termed Gas initially in place (GIIP) to describe the volume of gas that exists at initial discovery.