Supervisor Well Control Practice Quiz Level 4

Part of the way through the 1st circulation of the Driller’s method, the pump was shut down and the well was shut in. What is the over balance in this well? Current dp pressure = 725 psi, Casing pressure = 1050 psi, Initial circulating pressure = 1500 psi, Initial SIDPP = 500 psi, Initial SICP = 1000 psi.

What changes do you expect to see at the shakers when drilling in transition zone to abnormally pressured zone?

While tripping pipe in the hole the volume of mud displaced is more than the calculated volume. What could cause this

What would be the formation pressure if the mud weight is 17 ppg, SIDPP is 250 psi, SICP is 600 psi and the well is 14,000 feet TVD, 16,250 M.D.?

If the pump speed is decreased, what happens to the friction losses in the annulus

The frac gradient of a formation at 5000 feet TVD, 6000 feet M.D. is .832 psi/ft. Mud weight in hole is 10 ppg. Approximately, how much surface pressure can be applied before the formation breaks down?

A well has been drilled to T.D. of 12.500 feet TVD, 14,000 feet M.D. and the current density of the drilling mud is 13.5 ppg What will the bottomhole pressure be if 700 psi pressure is applied from the surface with the BOP’s closed?

A Leak off test has been conducted. From the info gathered, calculate the MAMW. Applied Surface Pressure = 1200 psi, Shoe Depth = 12,500’ TVD, Test Mud Weight = 13 ppg

A FIT is to be performed after the shoe is drilled. Calculate the required surface pressure to achieve the desired shoe test. Desired Shoe Test = 17 ppg, Shoe Depth = 10,850 feet TVD/12,500 feet M.D. Current Mud Weight = 12 ppg

A Test on a barrier where the pressure on the formation side of the barrier is less than the pressure on the surface side of the barrier is call

How does increasing temperature affect OBM density?

We had a kick 1000 feet off bottom. Before stripping into the well with pipe, what valve is inserted on top of the TIW valve?

You are going to circulate a 15 barrel kick out of the well using the Driller’s Method. SIDPP is 500 psi and SICP is 800 psi. If formation pressure is 3000 psi and maximum anticipated surface pressure during the kill operation is 1500 psi, what would be the additional pit gain anticipated at surface? Mud weight in the hole is 10 ppg. (Ignore Temperature and Compressibility of fluid)

A hydraulic delay exists between the time the choke is adjusted to the time the drill pipe pressure reacts. If you had 600 on the casing and 400 on the drill pipe, how long would it take for the reaction to happen on the drill pipe if you wanted to increase the drill pipe pressure to 500 psi on this 10,000 foot well?

Your current mud weight is 13 ppg and you pumped a 40 barrel slug weighing 15.5 ppg. Your Drill pipe capacity is .01776 bbl/ft. How many fee of dry pipe will you have after pumping the slug?

A well is shut in with the following info. Drill pipe pressure reads 0 psi, Well depth = 9000 TVD, 10,500 M.D. Drill string is full of 12 ppg mud. Annulus is full of 8.9 mud/gas mixture. Calculate the expected casing pressure in this static u-tube

Which of the following is a procedural barrier in well control?

A well is shut in with SIDPP = 750 psi and casing pressure = 1000 psi. Pit gain was 25 barrels! After 30 minutes, the pressures start to rise due to gas migration. If the casing pressure is held constant at 750 psi by adjusting the choke regularly, what will happen to the bottom hole pressure?

Calculate Kill Weight mud with the following info: SIDPP = 620 psi, SICP = 1080 psi, Pit Gain = 10 barrels, Current mud weight = 12.2 ppg, Well Depth = 13,566 feet TVD, 16,500 feet MD

Fracture gradient is .745 psi/ft. What is the equivalent mud weight?

This is a bonus question, What is your name and who do you work for?