Production

Production



Marjo's electrical infrastructure, including a variable speed unit for horizontal dewatering applications. All new wells with submersibles are placed on variable speed drives so that they can be run at varying frequencies until steady enough conditions are reached that a one-speed switchboard can be put in place. Marjo's power systems are commonly equipped with a field shut-in switch, so that an entire system can be shut-off instantly in the event of a lightening storm or other event which can severely damage this expensive equipment.




Crews assembling and running an electric submersible pump assembly, consisting of two pumps, motor, protector, and bottom-hole pressure sensor. ESP assemblies as long as 100 feet are ran into the well bore and placed a few feet above the casing point, just above a horizontal angle. This provides for maximum intake of the well bore fluids and sufficient draining of the well lateral. Submersible pumps are equipped with bottom-hole pressure sensors so that formation conditions can be monitored during production. Submersible pumps are also downsized in wells as overall production declines.



A typical submersible pump wellhead configuration. Tubing pressure, backside pressure, and flowline pressure can all be determined at the wellhead. In addition, all of Marjo's ESP wellheads are equipped with orbit valves on the tubing, allowing for the well to be shut-in in the event of an emergency.



A Marjo well with a pumping unit and wellhead compressor. Marjo currently has approximately forty compressors on lease for use on declining wells, in which maximum reserve recovery is critical. Large pumping units, such as 640 or 912 sized units, are first placed on wells upon removal of a submersible pump, but as production declines and these large units become uneconomic, smaller and more efficient units, such as 160 or 320 sized, are placed on the wells.

A shallow well with size 40 pumping unit.


A centralized tank battery complex and Arbuckle saltwater disposal well for dewatering. Production, separation, and disposal facilities are all placed in one complex, allowing for an easy to maintain and land saving facility. Marjo also commonly purchases the land on which these facilities are placed, keeping local landowners free of the burden of having large and potentially hazardous facilities on their land.

Conventional tank batteries are much simpler and do not require complex separation equipment and disposal facilities. However, Marjo still combines adjacent leases into single tank batteries to conserve land.