What is the purpose of perforation?
A perforation is a small hole or row of holes punched into a material — commonly found on paper, plastics, and packaging products — so a part of it can be easily torn off. The purpose of a perforation is to make a material easy to tear or bend.
How is perforation done?
Perforation operation is an elemental key step in the process of well completion. It involves creating a flow path between the reservoir and the wellbore for the inflow of the reservoir fluid into the wellbore. During perforation a flow path is created with help of high energy detonation by special shaped charges.
What is perforation fluid?
1. n. [Perforating, Well Completions] A specially prepared fluid placed in the wellbore over the interval to be perforated. The ideal fluid is clean and solids-free (filtered), and will not react to cause damaging by-products on contact with the reservoir formation.
What is perforation rate?
Results: The frequency of perforation was found to be 1 in 1400 for overall colonoscopies and 1 in 1000 for therapeutic colonoscopies. Varying perforation rates have been estimated for polypectomies, endoscopic mucosal resections, and endoscopic submucosal dissections.
Why well completion is important?
The wellbore provides the only path from the surface to the reservoir. To a large extent, the successful production and depletion of a reservoir depends upon the successful completion and workover operations applied to a well.
What is perforation in oil and gas?
Perforating is a process used to establish a flow path between the near reservoir and the wellbore. It normally involves initiating a hole from the wellbore through the casing and any cement sheath into the producing zone.
What is perforation medical?
Perforation is a hole that develops through the wall of a body organ. This problem may occur in the esophagus, stomach, small intestine, large intestine, rectum, or gallbladder.
What are the main types of perforation fluids?
These are aero-based drilling and completion fluid, including aero-fluid, fog fluid, foam fluid, and aeration drilling and completion fluid; water-based drilling and completion fluid, including solid free clean salt water completion fluid, clay-free solids-laden completion fluid (temporarily blocking-type system), and …
What is the risk of perforation with colonoscopy?
One of the most serious complications of colonoscopy is endoscopic perforation of the colon, which has been reported as between 0.03% and 0.7% [1, 2]. Although colonoscopic perforation (CP) occurs rarely, it can be associated with high mortality and morbidity rates.
What is colonoscopic perforation?
Colon perforation is an uncommon but serious complication of colonoscopy. It may occur as either intraperitoneal or extraperitoneal perforation or in combination. The majority of colonic perforations are intraperitoneal, causing air and intracolonic contents to leak into the peritoneal space.
What are well completion activities?
The specific activities involved in well completion include; drill stem tests (DST), production casting, production tubing installation, production flow commencement and installation of beam pumping units. Drill stem tests have to be conducted to determine production formation potential.
How does well completion work?
Well completion incorporates the steps taken to transform a drilled well into a producing one. These steps include casing, cementing, perforating, gravel packing and installing a production tree. After a well has been drilled, should the drilling fluids be removed, the well would eventually close in upon itself.
What is the process of perforating an oil well?
Perforating is a method of establishing a path between a wellbore and the reservoir. The process initiates by digging a hole from the bore through the casing. Oil well Perforating is categorized in two major parts, i.e., Underbalanced Perforating and Overbalanced Perforating.
What is the purpose of a perforating service?
Perforating services are carried out with utmost safety thus service providers use prominent technologies, procedures and premium tools to achieve success for critical perforating operations. The main purpose of Perforating is to create a channel between the bore and the pay zone so that gas or oil can easily flow through them.
When to use overbalanced or Underbalanced Perforating?
Overbalanced Perforating is carried out to ensure that oil does not start flowing out immediately after Perforating while Underbalanced Perforating is carried out when the pressure in the reservoir is higher than the pressure in the wellbore.
What does petropedia mean in terms of perforating?
Petropedia explains Perforating. Perforating services are carried out with utmost safety thus service providers use prominent technologies, procedures and premium tools to achieve success for critical perforating operations.
Perforating services are carried out with utmost safety thus service providers use prominent technologies, procedures and premium tools to achieve success for critical perforating operations. The main purpose of Perforating is to create a channel between the bore and the pay zone so that gas or oil can easily flow through them.
How is perforation technology used in offshore oilfields?
Perforation completion is one of the most commonly used completion methods in offshore oilfields, according to the characteristics of different reservoirs, proper perforation technology can effectively communicate reservoir and wellbore, so as to improve the efficiency of oilfield development.
What does it mean to perforate an oil well?
Definition – What does Perforating mean? Perforating is a method of establishing a path between a wellbore and the reservoir. The process initiates by digging a hole from the bore through the casing. Oil well Perforating is categorized in two major parts, i.e., Underbalanced Perforating and Overbalanced Perforating.
How does a perforating gun work on a well?
Expand the range of wireline (or electric line) for running perforating guns, improving efficiency while reducing rig time and cost. Run long, heavy gun strings in all well conditions. Perforate, punch tubing, and cut for pipe recovery—on depth and in real time.