Autonomous subsea tieback enabling platform

A method for conveying a fluid produced from at least one producing subsea well to an existing host facility within a 100 km distance via a flowline, comprising:

• (a) positioning a support structure at a water's surface and proximate to the at least one producing subsea well, the support structure having at least:
• a deck, and
• a mooring system anchoring the support structure to a seabed and configured to passively position the support structure proximate to the at least one producing subsea well, the support structure being configured to elevate the deck above a water's surface;
• and
• a plurality of topsides modules disposed on the deck, the plurality of topsides modules including at least:
• a power generation module configured to generate electrical power,
• a switchgear module configured to boost the flow from at least one fluid mover, at least one flow control device, and at least one thermal unit,
• a flowline heating module configured to energize a heating unit associated with the flowline;
• a chemical injection module configured to add at least one additive to the fluid produced from the at least one producing subsea well,
• a water injection module configured to treat, compress and inject seawater to at least one injection wells to improve ultimate resource recovery from the reservoir,
• a subsea control module configured to control at least one subsea well device, and
• a control module configured to communicate with a remote command center;
• (b) heating the produced fluid in the flowline using at least the power generation module, the flow line heating module, and the switchgear module;
• (c) injecting the at least one additive into the at least one subsea well using the chemical injection module;
• (d) treating, compressing, and injecting seawater into the at least one injection wells using the water injection module;
• (e) controlling at least one subsea well device using the subsea control module;
• and
• (f) communicating with the remote command center using the control module.

A system for producing a fluid from the at least one producing subsea well, comprising:

• (a) an existing host facility configured to process the fluid produced from the at least one producing subsea well;
• (b) a subsea tieback connecting the host facility to the at least one producing subsea well;
• (c) a support structure having at least:
• a deck, and
• a mooring system anchoring the support structure to a seabed and configured to position the support structure proximate to the at least one producing subsea well, the support structure being configured to position the deck above a water's surface;
• and;
• and
• (d) a plurality of topsides modules disposed on the deck, the plurality of topsides modules including at least:
• a power generation module configured to generate electrical power,
• a switchgear module configured to control at least one fluid mover, at least one flow control device, and at least one thermal unit,
• a flowline heating module configured to energize a heating unit associated with the flowline;
• a chemical injection module configured to add at least one additive to the fluid produced from the at least one producing subsea well,
• water injection module configured to treat, compress and inject seawater to improve reservoir ultimate recovery,
• a subsea control module configured to control at least one subsea well device, and
• a control module configured to communicate with a remote command center to enable the support structure to be normally unmanned.