What is a commingled well?
1. n. [Well Testing] A wellbore completed in two or more reservoir zones that are not in hydraulic communication in the reservoir. Backflow (often incorrectly referred to as crossflow) is common during rate cutbacks and buildup tests on these types of completions.
What is well completion equipment?
Completion equipment are those equipment which are used to bring an oil well to the completion state so that first test production and later on commercial production can be started from it.
What is downhole completion tools?
Downhole Tools are pieces of oilfield equipment that are used during well drilling, completion and intervention or well workover activities and helps the oil well in optimizing the production levels and maintain a continuous flow from a reservoir.
What are the types of well completion?
Completions can be divided into three categories: open hole completions, liner completions, and perforated casing completions. In most wells, conventional single perforated casing completions are used; however, multiple, alternate, or slim hole completions may be used under certain conditions.
What is commingled liquid?
A term used to describe the flow pattern where two or more fluid phases may be present in a relatively even distribution. Commingled flow may also describe the production of fluid from two or more separate zones through a single conduit.
What is cased hole completion?
Cased hole completion This involves running casing and a liner down through the production zone, and cementing it in place. Connection between the well bore and the formation is made by perforating.
What is open hole well completion?
Open hole completion means that the oil reservoir is completely exposed during completion of a straight or horizontal well. After drilling to the top of the oil reservoir, the intermediate casing is run in and the well is cemented.
What is a downhole tool?
What Are Downhole Tools? Downhole tools, as the name suggests, consist of a wide range of different tools that are used in the oil and gas fields to help with the drilling of wells, clearing of blockages, and ensuring that the wells are working to their full capacity.
What is well completion process?
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 dual completion well?
1. n. [Well Completions] A single wellbore having tubulars and equipment that enable production from two segregated zones. In most cases, two tubing strings will be used to provide the necessary level of control and safety for the fluids from both zones.
What is the difference between open hole and cased hole?
Open-hole logging refers to logging operations that are performed on a well before the wellbore has been cased and cemented. On the other hand, cased-hole logging involves retrieving logging measurements through the well casing, or the metal piping that is inserted into the well during completion operations.
What is a commingled wellbore?
A wellbore completed in two or more reservoir zones that are not in hydraulic communication in the reservoir. Backflow (often incorrectly referred to as crossflow) is common during rate cutbacks and buildup tests on these types of completions. Analysis of buildup data acquired from a commingled completion can be difficult or impossible.
What do engineers consider when designing a well completion?
Before designing a completion, engineers take into consideration-for every well-”the types and volumes of fluids to be produced, downhole and surface temperatures, production zone depths, production rates, well loca-tion and surrounding environment.
What are single-zone and multizone well completions?
Single-zone and multizone well completions. In the single-zone completion (left), a packer, which forms a seal inside the production casing, hydraulically isolates the tubing string from the region above the packer, called the backside. The backside contains completion fluid with corrosion inhibitors to prevent casing corrosion.
What is the best strategy for completing a well?
The driver behind every well completion strategy, whether for a complex or basic well, is to recover, at a reasonable cost, as large a percentage of the original oil in place (OOIP) as possible.