Oil Recovery Multizone Well Completion

Technology Description

The technology is a new process for oil and gas production from multilayered oil/gas fields. This innovative oil and gas production process will help to accelerate production and improve recovery with reduced costs. The technology will help in the efficient production, separation, handling and transportation of oil, gas and water in the upstream sector of the oil and gas industry.

As a general practice, different wells are drilled for different zones encountered in a reservoir, and oil and gas zones are not produced together from the same well. The DASS technology will help in allowing production from all the oil and gas zones available in a well and do so through one well thereby saving significant drilling costs.

The core innovation is a production chamber which, when installed inside the casing, changes the entire conventional production process. With this technology, the fluid from the reservoir is produced to the innovative production chamber and from the production chamber it flows to the well-bore. The production chamber is set over pre-drilled perforations in the well wall. The fluids from the reservoir enter through the perforations.

Multiple production chambers can be installed in a well depending upon the number of zones available for production. The production chamber is fitted with a non-return valve restricting any fluid flow from the well-bore to the reservoir thereby eliminating interlayer cross-flow of fluids. After the fluid enters into the well-bore, the liquid and gas are separated (dominated by gravity segregation and centrifugal action). The gas is produced through the annulus space (the void between any piping, tubing or casing and the piping, tubing, or casing immediately surrounding it) and oil is produced through the tubing.

Key aspects of the technology include:

• It will produce through single tubing and eliminate the complexity of lowering multiple tubing.
• The valves and functionality of the DASS well can be controlled from a control panel at the surface.
• It allows for a well completion which offers all the advantages of multiple tubing completions with commingle production and achieve it with a single tubing well completion.
• The production chamber is a new invention and part of a new oil and gas production process. All the fluid from the reservoir is produced through the production chamber to the wellbore and it stops the backflow of well fluid from a high pressure reservoir to a low pressure reservoir thereby stopping inter-well fluid cross-flow.
• The utilization of annulus space with DASS is believed to be different. In conventional wells annulus space is idle throughout the life of the well. In DASS, the annulus space between casing and tubing is used as a separator.

For further information please contact

Information Manager
Email: timeis@ficci.com