Matrix Water Injection – A Novel Technique
- Abdullah Eshtewi (Woodside Energy Ltd) | Richard White (Woodside Energy Ltd) | Stewart Campbell (Woodside Energy Ltd)
- Document ID
- Society of Petroleum Engineers
- SPE Asia Pacific Oil & Gas Conference and Exhibition, 17-19 November, Virtual
- Publication Date
- Document Type
- Conference Paper
- 2020. Society of Petroleum Engineers
- 2.7.1 Completion Fluids, 5 Reservoir Desciption & Dynamics, 2 Well completion, 2.2 Installation and Completion Operations, 1.11 Drilling Fluids and Materials, 5.4.1 Waterflooding, 2.7 Completion Fluids, 5.4 Improved and Enhanced Recovery, 2.2 Installation and Completion Operations
- Direct matrix water injection, Filter cake breaker, Matrix water injection, filter cake removal without flowback
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The Greater Enfield Project (GEP) is a challenging offshore oil development, designed to produce from the Laverda Canyon, Cimatti and Norton over Laverda oil fields. Six water injection wells are required to provide pressure support and sweep oil to three production wells in the Laverda Canyon and Cimatti oil accumulations to improve oil recovery. The GEP injection wells are a critical aspect of water flood design in a complex field, new to Woodside and with limited global benchmarks.
A specific drilling and completion fluid system (Reservoir drilling fluid, completion fluid and chemical filter cake breaker) combined with a unique clean up and displacement technique have been adopted to provide high and sustainable matrix injection performance. While filter cake breakers have been previously used in the industry, they are typically combined with a flowback for filter cake removals. Filter cake clean up by means of flowback was discounted for GEP due to cost and the inability of some wells to naturally flow during early life.
All GEP injection wells were completed in 2018-2019, one of which is globally the longest horizontal water injection well completed to date based on the Rushmore data base. Fieldwide injection commenced in July 2019 with favorable results. This paper summarises the key design aspects adopted to deliver successful matrix injection performance, presents the improvements implemented during offshore execution and provides an insight into the early life injection performance.
|File Size||1 MB||Number of Pages||25|
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