ADCO is pursuing a number of new technologies to further optimize engineering and operations. The following provides an overview some of those being addressed.
Development of a New Multiphase Flow Meter
Driven by the critical need to accurately measure the fluids being produced from our reservoirs, ADCO is undertaking the joint development of a novel multiphase flow meter (MPFM) using swirl separation technology with FRAMES (of the Netherlands) and the PI.
The MPFM comprises of a valve (SwirlValve) combined with an inline compact separator. Functionality is based on centrifugal separation of phases induced by swirling flow. Because of its small size, SwirlSep can be extended with a liquid hold up compartment and pressure controls and easily be fitted with a conventional single phase flow meter/water cut meter on a small skid. In this way, a compact, accurate and non-nuclear MPFM can be developed.
The new MPFM is expected to be a robust and flexible system and is aimed to be universal, suitable for both oil and gas wells and not limited by GOR and WC, hence overcoming the limitations of many MPFMs on the market.
Remote Monitoring of Cathodic Protection Systems
ADCO has over 2,500 operational Cathodic Protection (CP) systems for well casings and pipelines. Presently CP systems are monitored manually. Each installation has to be physically visited once a quarter by a monitoring crew and the data recorded. This is a time consuming and expensive activity that results in an elevated HSE exposure due to the amount of driving required. Furthermore, one major limitation of this sort of manual monitoring system is that in the event a system fails, it will not be detected until the next visit leaving the structure unprotected for some time.
The Remote Monitoring system overcomes these limitations as real time data are available and the end user receives an alarm if any system fails or operates outside the prescribed limits. It also eliminates the vast majority of visits to remote hazardous locations. ADCO successfully completed a trial with four different vendors. A plan is now in place to implement CP Remote Monitoring as part of our Wellhead Remote Monitoring and Control Project.
High Density Polyethylene Liner for Water Flowlines
ADCO has a vast network of water supply and water injection flowlines. These flowlines carry corrosive fluids and maybe subjected to internal corrosion, which can result in integrity problems. Recently ADCO has been exploring various solutions to overcome and minimize the impact of internal corrosion of these flowlines. A High Density Polyethylene (HDPE) Liner was identified as a potential solution. An HDPE liner has the advantage over other solutions as there is no risk of internal corrosion, it provides improved flow characteristics over carbon steel (CS), removes the need for internal pigging of lines to remove sediment and bacteria and there is no requirement to pump antiscaling chemicals and biocides. The CAPEX of an HDPE liner is similar to the cost of a CS pipeline, however OPEX is minimal. The initial CAPEX provides corrosion free operations for an extended operational life (~20 years).
ADCO has successfully carried out an HDPE liner field trial for a water injection flowline. The line has been in operation since May 2013 without any incident of internal corrosion or failure. Encouraged by these results, ADCO is planning to extend this technique to other water system flowlines.
Surface Jet Pump Trial
Surface Jet Pumps (SJPs) have been trailed by ADCO to demonstrate that this technology can re-activate inactive well strings that are currently not producing due to high water cut and low reservoir pressure. It has been applied in dual completion wells using the active string’s flow and pressure as the power fluid. The technology is based on Bernoulli’s principle. The SJP has no moving parts, no active controls, requires minimal maintenance, has a small foot print compared to alternative solutions, is compact, and does not require a well intervention or work over.The trial results successfully demonstrated that the SJP can re-activate the targeted inactive strings. Going forward, ADCO is currently planning further trials using a modified, optimized design.