据海上工程师网报道，全球著名油气市场研究机构韦斯特伍德全球能源集团（Westwood Global Energy Group）日前表示，今年上半年全球共完钻38口高影响力勘探井，几乎与去年同期全球完成39口高影响力勘探井的情况类似。38口高影响力勘探井中有13口具有潜在的商业开采价值，商业成功率为34%，已发现油气资源量约为60亿桶油当量。
韦斯特伍德全球能源集团认为，高影响力勘探井是指那些目标为1亿桶油当量（中等可采储量）的井，或任何前沿远景区试验井。
在38口高影响力勘探井中，有8口井确定了试验前沿远景区，在纳米比亚近海奥兰治盆地的Venus和Graff勘探井中获得了重要的盆地开口发现。
法国道达尔能源公司在纳米比亚深海海域发现的Venus井是今年迄今为止最大的发现，在下白垩纪Aptian-Albian盆地海床沉积扇中拥有数十亿桶的潜在储量。然而，在肯尼亚海上拉姆盆地的Mlima井和在黑山共和国海上的Ulcinj井都发生了主要的前期勘探失利。
在今年上半年，18口高影响力勘探井测试了开发初期的远景区，获得了9个商业发现，商业成功率为50%。在苏里南-圭亚那海域的上白垩统地区，共完成了8口高影响力井的完井作业，取得了6口井的成功。今年上半年其他新发现的油气藏位于黎凡特盆地、珀斯盆地和奥兰治盆地。
主要的开发初期远景区失败包括巴西塞尔希培—阿拉戈斯盆地的Cutthroat井，该井勘探范围试图扩展巴拉上白垩统远景区，以及澳大利亚近海Roebuck盆地的Apus井，该井未能扩展多拉多远景区。
在正在成熟/成熟远景区的高影响力勘探令人失望，在美国墨西哥湾休伦所钻的12口井中只获得了一个潜在的商业发现。在巴西试图拓展盐下远景区的尝试多次失败，阿塞拜疆浅水地区的SWAP许可证也令人失望。
全球高影响力钻井活动将在今年下半年回升，预计到今年底前将完钻80口-90口高影响力勘探井，这是自2019年以来的最高数字，2019年全球共完钻98口高影响力勘探井。
南美洲今后将继续是全球油气勘探热点，苏里南-圭亚那盆地和巴西近海计划钻取更多的井。非洲将在今年恢复高影响力勘探钻井，继今年早些时候在纳米比亚取得成功后，计划在南非、莫桑比克和津巴布韦开展关键井的勘探作业。虽然亚太地区和欧洲西北部的活动水平相对稳定，但在去年没有钻取任何井的情况下，地中海东部深水区将在今年恢复高影响力勘探钻井作业。
韦斯特伍德全球能源集团强调，全球在今年剩余的时间里计划钻取的13口井是“值得关注的关键井”。其中包括一系列前沿远景区试验井，例如莫桑比克近海的Raia井和英国近海的Pensacola井已探明远景区的延伸，位于美国墨西哥湾的Hoodoo井和苏里南海上的Zanderij井； 位于圭亚那近海的Wei井都已探明远景区的大型远景构造。
韦斯特伍德全球能源集团在最近发布的一份报告中详细回顾了今年上半年内全球的高影响力钻井业绩。
李峻 编译自 美国油价网
原文如下：
High Impact Exploration Sees Rebound
38 high-impact exploration wells were drilled in the first half of 2022, similar to the same period in 2021 when 39 wells completed, says industry analysts Westwood Global Energy Group. The 38 wells resulted in 13 potentially commercial discoveries at a 34% commercial success rate, delivering ~6bnboe of discovered resource.
Westwood Global considers high-impact well as those targeting a >100mmboe (mid-case, recoverable) prospect or any frontier play test.
Eight of the wells 38 high-impact wells identified tested frontier plays, with significant basin-opening discoveries at Venus and Graff in the Orange Basin offshore Namibia.
TotalEnergies' Venus in deepwater offshore Namibia is the largest discovery in 2022 so far, with multi-bnboe potential in a Lower Cretaceous Aptian-Albian basin floor fan. There were, however, key frontier failures at Mlima in the Lamu Basin offshore Kenya and at Ulcinj offshore Montenegro.
18 wells tested emerging plays in 1H 2022 resulting in nine commercial discoveries and a 50% commercial success rate. Eight wells were completed in the Upper Cretaceous play offshore Suriname-Guyana delivering six successes. The other emerging play discoveries were in the Levantine (Athena), Perth (S Erregulla) and Orange (La Rona) basins. Key emerging play failures include Cutthroat in the Sergipe-Alagoas Basin, which tried to extend the Barra Upper Cretaceous play, as well as Apus in the Roebuck Basin offshore Australia, which was unsuccessful in extending the Dorado play.
High impact exploration in maturing/mature plays disappointed, with only one potentially commercial discovery from 12 wells drilled, at Huron in the US Gulf of Mexico. There were multiple failures attempting to extend the pre-salt play in Brazil, as well as further disappointments in the SWAP licence in the shallow waters of Azerbaijan.
High impact drilling activity will pick up in the second half of the year, with between 80 and 90 high impact wells expected to have been drilled by the end of 2022, the highest number since 2019 when 98 high impact wells completed.
South America will continue to be an exploration hot spot with more wells planned for the Suriname-Guyana basin and offshore Brazil. Africa will see a return to high impact exploration in 2022, with key wells planned in South Africa, Mozambique and Zimbabwe following the successes in Namibia earlier in the year. Whilst activity levels in Asia-Pacific and NW Europe are relatively stable, 2022 sees a return to high impact exploration in the deepwater of the Eastern Mediterranean after 2021 when no wells were drilled.
Westwood has highlighted 13 wells planned for the remainder of 2022 as ‘key wells to watch’. These include a number of frontier play tests, for example Raia offshore Mozambique, and Pensacola, offshore UK; extensions of proven plays, including Zanderij offshore Suriname and Hoodoo, US Gulf of Mexico; and large prospects in proven plays, such as Wei, offshore Guyana.
High impact drilling performance for 1H 2022 as well as the key wells to watch for 2H 2022 are reviewed in detail by Westwood in a recently published report.
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