SNF worked on specific devices to deal with all challenges faced in polymer applications, especially in Enhanced Oil Recovery (EOR) in order to guarantee the best solutions, cost effective in full respect of the environment.
POLYMER INJECTION UNIT (PIU)
SNF has developed pre-designed and standardized modular solutions enabling injection of polymers into wells at proper viscosities and flowrates. These modular systems called PIU (Polymer Injection Unit) consist of 40 ft. HC standard sea containers for easy transport. They are assembled together, which integrates all of the required equipment for injection and dissolution of polymers.
Modular injection systems can be connected to existing water injection lines, without the need to develop new infrastructure. These units allow for quick installation and start-up.
Modular systems enable incremental development from pilot to full-field solutions with limited and controlled risk, thereby optimizing costs and delivery lead-times.
MOTHER SOLUTION PREPARATION
PIU relies on the following dissolution principle for polymers: Polymer powder coming from a storage is mixed with water to create a mother solution, using a Floquip PSU (Polymer Slicing Unit). After complete maturation, the solution is diluted and injected without filtration into wells respecting injection rates and pressure. Nitrogen blanketing is used to preserve polymer during dissolution process.
|Model||Purpose||Flow Rates||Dry Polymer|
|PIUC||Injectivity test. Single well tracer test||6,00 bpd @ 1,500 ppm maximum injection rate 3,000 bpd||1.4 MT / Day 0.7 MT / Day|
|PIU 100||Pilot, small injection rates||10,000 bpd @ 1,500 ppm||2.5 MT / Day|
|PIU 300||Pilot, medium injection rates||30,000 bpd @ 1,500 ppm||7.5 MT / Day|
|PIU 600||Pilot, large injection rates Partial fullfield||60,000 bpd @ 1,500 ppm||15 MT / Day|
Polymer Injection Unit Capacities
There are several models of the Polymer Injection Unit (PIU) available to dissolve varying quantities of polymer utilizing our patented PSU technology.
Typical PIU models, primary design purposes, and capacities are outlined below.
PIUC is the most compact injection model available (contained in one 40 ft. container). It was specially designed to reduce overall equipment size and footprint in the field
PIUS INJECTION CONFIGURATION
There are different possible options for polymer flooding depending on site configuration.
Dilution with water can be done at low or high pressure.
VPR and LPR enable to control Injection in each individual well without degrading the polymer.
IF HIGH PRESSURE WATER IS AVAILABLE
IF ONLY LOW PRESSURE WATER IS AVAILABLE