The formula to calculate the Formation Pressure (FP) is:
\[
FP = HSPM + HSPI + SICP
\]
Where:
\( FP \) is the Formation Pressure (psi)
\( HSPM \) is the hydrostatic pressure of the mud in the annulus (psi)
\( HSPI \) is the hydrostatic pressure of the influx (psi)
\( SICP \) is the shut-in casing pressure (psi)
Definition
Formation Pressure (FP): The pressure within a geological formation.
Hydrostatic Pressure of the Mud in the Annulus (HSPM): The pressure exerted by the column of mud in the annulus.
Hydrostatic Pressure of the Influx (HSPI): The pressure exerted by the influx fluid.
Shut-in Casing Pressure (SICP): The pressure measured at the casing head when the well is shut in.
Example
Let's say the hydrostatic pressure of the mud in the annulus (HSPM) is 1000 psi, the hydrostatic pressure of the influx (HSPI) is 500 psi, and the shut-in casing pressure (SICP) is 200 psi. Using the formula:
\[
FP = 1000 + 500 + 200 = 1700
\]
So, the Formation Pressure (FP) is 1700 psi.
Extended information about "Formation-Pressure-Calculator"
Formation Pressure
Definition: Formation pressure is the pressure within a geological formation, often measured in megapascals (MPa).
Formula: \( P_f = \rho g h \)
\( P_f \): Formation pressure (MPa)
\( \rho \): Density of the fluid (kg/m³)
\( g \): Gravitational acceleration (m/s²)
\( h \): Height of the fluid column (m)
Example: \( P_f = 1000 \times 9.81 \times 2000 \)
\( P_f \): Formation pressure
\( \rho \): 1000 kg/m³
\( g \): 9.81 m/s²
\( h \): 2000 m
Base Pressure Calculation for Foundation
Definition: Base pressure is the pressure exerted by a foundation on the underlying soil.
Formula: \( P_b = \frac{W}{A} \)
\( P_b \): Base pressure (Pa)
\( W \): Weight of the structure (N)
\( A \): Area of the foundation (m²)
Example: \( P_b = \frac{50000}{25} \)
\( P_b \): Base pressure
\( W \): 50000 N
\( A \): 25 m²
Concrete Form Pressure
Definition: Concrete form pressure is the pressure exerted by fresh concrete on the formwork.
Formula: \( P_c = \rho g h \)
\( P_c \): Concrete form pressure (Pa)
\( \rho \): Density of concrete (kg/m³)
\( g \): Gravitational acceleration (m/s²)
\( h \): Height of the concrete pour (m)
Example: \( P_c = 2400 \times 9.81 \times 3 \)
\( P_c \): Concrete form pressure
\( \rho \): 2400 kg/m³
\( g \): 9.81 m/s²
\( h \): 3 m
Formation Volume Factor
Definition: The formation volume factor is the ratio of the volume of fluid at reservoir conditions to the volume at standard conditions.
