???? 據(jù)石油世界期刊2月24日里約熱內(nèi)盧報(bào)道，巴西石油巨頭獨(dú)立油氣生產(chǎn)商Enauta于2月22日表示，該公司重啟了位于亞特蘭大近海油田的一口生產(chǎn)井，日產(chǎn)量如預(yù)期的約為10400桶。
????Enauta表示，7-ATL-4HB-RJS油井在更換了通往該井一個(gè)油加熱器的管道后重新啟動(dòng)。今年1月，Enauta在關(guān)閉近3個(gè)月后首次嘗試重啟該油井的生產(chǎn)，但這口井的表現(xiàn)并沒(méi)有達(dá)到預(yù)期。
????自去年12月前合作伙伴Barra Energia放棄50%的股權(quán)后，Enauta公司獲得了該油田的100%控制權(quán)，此次重新開(kāi)始生產(chǎn)標(biāo)志著亞特蘭大油田的首個(gè)積極進(jìn)展之一。亞特蘭大油田的開(kāi)發(fā)一直受到技術(shù)問(wèn)題和延遲的影響，這些問(wèn)題抵消了該油田原油的價(jià)值。該油田的原油含硫量低，是加工成超低硫柴油（ULSD）和低硫船用燃料的理想選擇。
????該等級(jí)原油的受歡迎程度使得Enauta經(jīng)常以相對(duì)布倫特原油略微折扣的溢價(jià)出售。
????最新的一系列技術(shù)問(wèn)題始于2020年中期，當(dāng)時(shí)FPSO Petrojarl I浮式生產(chǎn)、存儲(chǔ)和卸載船（FPSO）的水處理出現(xiàn)問(wèn)題，影響了8 - 9月的生產(chǎn)。據(jù)Enauta稱，F(xiàn)PSO的水處理能力約為6,000桶/日，限制了原油生產(chǎn)。去年11月，Enauta關(guān)閉了亞特蘭大的生產(chǎn)，作為一項(xiàng)預(yù)防措施，因?yàn)樵跈z查故障的油加熱器時(shí)發(fā)現(xiàn)水下設(shè)備發(fā)生腐蝕。
????這些加熱器是用來(lái)保持亞特蘭大的高粘度原油從海底流到海面上的浮動(dòng)生產(chǎn)裝置，因?yàn)檫@些原油太稠了，不會(huì)從傾斜45度的杯狀容器中滴落出來(lái)。
????據(jù)Enauta稱，1月26日，在初步維修完成后，該公司曾短暫重啟生產(chǎn)，但在設(shè)備未能按預(yù)期運(yùn)行后迅速關(guān)閉。Petrojarl I FPSO的運(yùn)營(yíng)商Teekay Offshore隨后承擔(dān)了對(duì)故障設(shè)備進(jìn)行全面置換的任務(wù)。
????Enauta公司在1月7日發(fā)布的產(chǎn)量預(yù)測(cè)中表示，盡管停工，但預(yù)計(jì)亞特蘭大油田2020年的平均產(chǎn)量約為1.4萬(wàn)桶/天，波動(dòng)幅度約為10%。
????Enauta表示，剩余的維修時(shí)間包括更換油田剩余的兩口油井的加熱器。預(yù)計(jì)7-ATL-3H-RJS井將在第一季度重啟生產(chǎn)，預(yù)計(jì)初始日產(chǎn)量為1萬(wàn)桶。7-ATL-2HP-RJS井將于2021年年中恢復(fù)生產(chǎn)。
????Enauta公司還沒(méi)有披露該油田的最新問(wèn)題將如何影響公司對(duì)該油田的未來(lái)計(jì)劃，特別是在2020年底獲得該油田的100%控制權(quán)之后。確定生產(chǎn)系統(tǒng)的工作已經(jīng)進(jìn)行了多年，但受油價(jià)波動(dòng)、冠狀病毒大流行和Barra Energia退出等因素的影響。
????據(jù)Enauta表示，該最終生產(chǎn)系統(tǒng)將增加9口新生產(chǎn)井和注入井，以及一個(gè)新的FPSO，裝機(jī)產(chǎn)能約為5萬(wàn)-6萬(wàn)桶/天。新FPSO的水處理能力也將超過(guò)Petrojarl I FPSO。
????郝芬 譯自 石油世界期刊
????原文如下：
????Enauta restarts production well at Santos basin offshore Atlanta Field
????Brazilian independent oil and natural gas producer Enauta restarted a single production well at the offshore Atlanta Field, pumping about 10,400 b/d as expected, the company said Feb. 22.
????The 7-ATL-4HB-RJS well was restarted after swapping out pipes to one of the well's oil heaters, Enauta said. This was the same well that failed to perform as expected in January, when Enauta first attempted to restart production at the field after a nearly three-month shutdown.
????The production restart marks one of the first positive developments at Atlanta since Enauta assumed 100% control of the field in December after former partner Barra Energia relinquished its 50% minority stake. Atlanta's development has been marred by technical troubles and delays that have offset the value of the field's crude, which is highly prized for low sulfur content that makes it ideal for processing into ULSD and low-sulfur bunker fuel.
????The grade's popularity has allowed Enauta to often sell cargoes at a premium to slight discount to Brent.
????The latest series of technical troubles started in mid-2020, when there were issues with water-processing onboard the FPSO Petrojarl I floating production, storage and offloading vessel that affected production in August-September. Crude oil production was limited by the FPSO's water-processing capacity of about 6,000 b/d, according to Enauta. Enauta then shuttered production at Atlanta as a preventive measure in November, when corrosion was discovered on subsea equipment during inspections of the failed oil heaters.
????The heaters are needed to keep Atlanta's highly viscous crude, which is so thick that it won't drip out of a cup sitting tipped at a 45-degree angle, flowing from the seabed to the floating production unit on the surface.
????Output was briefly restarted Jan. 26 after initial repairs were completed, but was shuttered quickly after the equipment failed to function as expected, according to Enauta. Teekay Offshore, which operates the FPSO Petrojarl I, was then tasked with a full swap of the faulty equipment.
????Enauta expects Atlanta to produce an average of about 14,000 b/d in 2020, with a variation of 10% more or less, despite the downtime, the company said in a production forecast released Jan. 7.
????The timeline for remaining repairs, which involve swapping out oil heaters at the field's remaining two production wells, was maintained, Enauta said. The 7-ATL-3H-RJS well is expected to restart production in the first quarter, with initial output of 10,000 b/d expected. The 7-ATL-2HP-RJS well will return to production by the middle of 2021, Enauta said.
????Enauta also has not yet disclosed how the latest issues at the field will affect the company's future plans for the field, especially after assuming 100% control at the end of 2020. Work on the definitive production system has been underway for years, but subject to changes related to oil-price volatility, the coronavirus pandemic and Barra Energia's exit.
????The definitive production system would add nine new production and injection wells as well as a new FPSO with installed capacity to produce about 50,000-60,000 b/d. The new FPSO would also have more water-processing capacity than the FPSO Petrojarl I, according to Enauta.
