C&C Reservoirs’ latest content release is now available in DAKS. This includes 61 Reservoir Evaluation Reports from across the globe.
Highlights include:
Beryl Field (UK) – Two report updates for the Beryl-Linnhe and Lewis reservoirs. This field had an EUR of 942 MMBO with most of the reserves (78%) in the Jurassic Beryl-Linnhe reservoir. There are 27 individual pools within a highly faulted terrace and the field mainly produces from the heterogeneous Beryl tidal-delta complex. Water injection and crestal gas injection began in 1977 but led to a complex fluid distribution with differential pressure depletion. Recovery was improved by using multilateral and extended-reach wells, well workovers and recompletions. By end-2022 the field had produced 862 MMBO.
Buzzard (UK) – Located in the Outer Moray Firth Basin, this oil field began production in 2007. It has an EUR of 935 MMBO and recovery factor of 62%. It contains a substantial 1542 ft oil column in the Jurassic Buzzard Sandstone within a stratigraphic trap comprising depositional pinch-out onto the Grampian Spur. The stacked turbidite lobes have permeabilities averaging 1.9 D. Water injection has been underway since production startup and intelligent well completions provide critical real-time data for optimizing production and waterflood management. Phase II development began in 2019 and cumulative production reached 827 MMBO by July 2023.
Campo Duran (Argentina) – Onstream since 1957, most reserves occur in the Upper Carboniferous Tupambi Formation, which has a GIIP of 1378.7 BCF and an EUR of 1218.4 BCF (88% RF). 300-476 m-thick gas-condensate columns are contained in an asymmetric anticline within three thrust sheets. Production is mainly from braided-channel and distributary mouth-bar sandstones with an average porosity of 13% and permeability of 10 mD. Recovery has been improved by multi-stage hydraulic fracturing and gas injection.
Daqing (La-Sa-Xing) (China) – The largest field in China has been onstream since 1960. With a STOIIP of 30 BBO and EUR of 18 BBO (RF 58%). The 33 °API (9 cP) oil is trapped in three adjacent inversion anticlines and produced from multi-layered fluvial and lacustrine-deltaic sandstones with average net pay of 46 m. Staged infill drilling and early water injection helped maintain a 23-year plateau. Fieldwide application of polymer and ASP flooding has proved effective with potential incremental recovery factor of 12% (polymer) and 20% (ASP), respectively.
Tinsley (USA) – Onstream since 1939, this field has a STOIIP of 547 MMBO and an EUR of 280 MMBO for a 51% recovery factor, with most of the in-place (64%) occurring in the Upper Cretaceous Woodruff shoreface-shelf sandstones. Average reservoir porosity and permeability are 26% and 90 mD. Light oil (33 °API) is trapped in a faulted, salt-related anticline supplemented by depositional pinch-out. Production is mainly by strong aquifer drive aided by waterflood and CO2 miscible flood.
Yamburg (Russia) – Discovered in 1969 but came onstream in 1986, the field has a GIIP of 289 TCF and a CIIP of 1225 MMBC, with EURs of 244 TCF and 808 MMBC, for gas and condensate recovery factors of 84% and 66%, respectively. A basement-uplift anticline with hydrocarbons trapped by dip closure and depositional pinchout, the reservoirs were deposited in shallow marine, coastal plain (Megion-Vartov reservoir) and fluvio-deltaic (Pokur reservoir) environments. Continuous development drilling in the Pokur reservoir and acidization and hydraulic fracturing in the Megion-Vartov reservoir led to a 7-year plateau (1992-98). Cumulative gas recovery had reached 61% of EUR by end-2020.
Updated/rewritten reports:
All the reports included in this release were chosen for updating due to the publication of significant new engineering information, new production data, new reserve/resource information and/or revised geological models. This update includes a wide global spread of reports, including: 19 from Latin America, 11 from Europe, 8 from North America, 6 from Australia, 6 from the Middle East, 5 from Africa, 4 from Russia and the Caspian, and 2 from Asia-Pacific.