FISCHER TROPSCH METHOD FOR OFFSHORE PRODUCTION RISERS FOR OIL AND GAS WELLS

摘要

A method and an apparatus is disclosed that uses a gas lift tubing arrangement to produce synthetic hydrocarbon related products. Using the Fischer Tropsch process as an example, the tubing is packed with a suitable catalyst and then hydrogen and carbon monoxide are injected into the top of the tubing in a fashion similar to a gas lift process. As the gases travel past the catalyst, synthetic hydrocarbons are formed and heat is rejected. The synthetic hydrocarbons and water flow out of the bottom of the tubing and travel up the annulus to the surface. In some embodiments, this process is carried out in a producing well or a in producing riser. In a producing well or a producing riser, the production from the well which flows up the annulus cools the synthetic hydrocarbon derived products. In additional and alternate embodiments, this process can be used in non-flowing wells.

主权项

1. A method for producing synthetic hydrocarbons, comprising the steps of:
injecting hydrogen and carbon monoxide into a gas lift apparatus, and forcing synthetic hydrocarbons out of the gas lift apparatus, wherein the gas lift apparatus comprises a tubing and an annulus, wherein the tubing further comprises a Fischer-Tropsch catalyst, and wherein the tubing is configured such that hydrogen and carbon monoxide travel past the Fischer-Tropsch catalyst to form synthetic hydrocarbons.