Case Study of an Offshore Operation Conducted with a Fit-for-Purpose Abandonment System

Abstract

Traditional late-stage abandonment operations can utilize equipment originally designed for drilling a well. However, innovative new technologies have been developed which far better meet the unique needs of intervention and abandonment work. The effective application of these systems in the oil and gas industry has resulted in both significant cost savings and an increased standard of safety. Additionally, Operators have realized that an integrated project solution from a single source is integral to completing the job scope in a competent and effective manner. This paper examines the successes of a fit-for-purpose system currently working in the Gulf of Mexico which is specifically designed to both conduct late-stage intervention and abandonment project, and focus on safety while reducing overall operational expenditures.

To effectively address the market, a new method for completing workovers and abandonment operations was needed. Subsequently, a system was designed which incorporates capabilities associated with costly Jack Up rigs along with the quick mobilization and set up of a crane assisted rigless unit. This solution has been utilized in offshore campaigns that include all phases of abandonment operations including well diagnostics, reservoir isolation, tubular retrieval, fishing, section milling, and conductor recovery

The case study will highlight the versatility and adaptability of the system which provides an integrated solution package to the client. The system which includes a pulling and jacking unit also includes all ancillary equipment necessary to efficiently intervene and permanently abandon offshore wells. The case study will discuss the project parameters, examine the operations, and review the lessons learned from a multiple well project on an offshore platform in the Gulf of Mexico.