Petroleum Engineering Well Completions

Name: Petroleum Engineering Well Completions
Author: KnowledgeCity

Learn essential information regarding well completion systems

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Course: On-Demand

(bright electronic tones) The casing string is the set of casings that are used in the well. A casing is a pipe which is the same size of the hole being drilled. A casing serves to prevent the collapse of the hole, makes the fluids rise to the surface equipment, and prevent the influx of unwanted fluids into the well. Therefore, its design is of vital importance when drilling a well. There are several types of casings that are classified by the borehole phase. Guide casing or conductor. This serves as support for the next casing and to prevent the collapse of surface sands. Surface casing. Its function is to protect surface formations from operations that will be performed deeper. Intermediate casing provides integrity in the face of abnormal pressures that can be found at these depths. Production casing. With this string, the well is produced and controlled throughout its life. It prevents the migration of fluids to thief areas, serves as support for the production string, and for the isolation of areas that contain hydrocarbons but will not be extracted just yet. Liners. Also considered casings, these serve as a filter for the well. Three criteria are used to design the casing string. Collapse. The collapse design is necessary based mainly on a hypothetical loss of circulation of the drilling mud. It's also essential to think that it may be possible for a maximum load to collapse when the casing is being lowered to the well. For both cases, the maximum possible external pressure that can cause the pipe to fail due to collapse is caused by the drilling fluid or drilling mud that is in the well when the casing is lowered and cemented. Burst. The design of the casing by burst must contemplate the greatest possible safety so it is convenient to assume the most extreme condition. This condition occurs when the formation gas completely displaces the mud column that is remaining inside the liner. In this way, the liner is exposed to the pressures generated by the formation gas or burst pressure. Tension. For this design, the engineer in charge of designing the casing must consider the possible failure of the casing due to the axial tension caused by the weight of the entire string of casing. Care must be taken that a string of liners be chosen so that the first five tubes can withstand stress since these are the ones that will most support the entire weight of the string. Although the total weight of the string affects the tensile stresses to which the liners will be subjected, we cannot rule out other factors, such as the drag these pipes can have when they're being lowered into the hole especially in the hole deviation point, or KOP, if they are deviated wells, bins, or different impact loads. This suspension of the casing in the well is necessary because inside the well, you must have a completion fluid that serves several purposes, such as preventing the influx of gases or preventing the string from sticking, both of which are common problems in practice.

Essential Provider : KnowledgeCity 8 Lessons · 18m in Arabic, English

Course Description

Well completion refers to the process of getting a well ready for production after drilling. There are many factors to consider when completing a well. The completion process can be as complex as the area where it is done and can depend on the well design. In this course, you will learn essential information about well completion systems. You will learn about tubing make-up and the importance of proper pipe selection, design, and installation.

We will discuss the process of hydraulic fracturing, its objective, and benefits. You will also learn the importance of sand control, the most common methods of sand control, and the criteria that must be considered when selecting a sand exclusion method. This course will also provide information on the two types of matrix stimulation, reactive and nonreactive, as well as the process of perforating. We will discuss types of casings and the benefits of each.

What You'll Learn

Select, design, and install tubing with proper pipe make-up
Explain the objective and benefits of hydraulic fracturing
Differentiate between the common methods of sand control and their selection criteria
Compare reactive and nonreactive matrix stimulation
Describe the perforating process and the suspension of casing strings
Identify the types of casings and the benefits of each

Key Takeaways

Well completion is the process of getting a well ready for production after drilling, and its complexity can depend on the area and the well design.
Proper pipe selection, design, and installation are important for tubing make-up during completion.
Sand control requires choosing an exclusion method based on defined selection criteria, with several common methods available.
Matrix stimulation comes in two types, reactive and nonreactive.
The course covers casing types and the benefits of each, along with perforating, multilaterals, and running completions.

Frequently Asked Questions

What does this course cover?

It covers well completion systems, including tubing make-up and pipe selection, design, and installation; hydraulic fracturing; sand control methods and selection criteria; reactive and nonreactive matrix stimulation; perforating; and types of casings and their benefits.

What is well completion?

Well completion refers to the process of getting a well ready for production after drilling. The completion process can be as complex as the area where it is done and can depend on the well design.

What are the learning objectives of this course?

To understand the importance of proper pipe selection, design, and installation; describe the objective and benefits of hydraulic fracturing; and differentiate between the various methods for sand control.

Which topics are taught in the lessons?

The lessons cover Casing String and Suspension, Tubing Selection and Connections, Sand Control, Multilaterals, Perforating, Matrix Stimulation, Hydraulic Fracturing, and Running Completions.

What skills does this course help build?

It supports skills in Drilling Engineering, Hydraulic Fracturing, Oil Well Workover, Petroleum Engineering, Well Completion (Oil and Gas), and Petroleum Engineering Certification.