The Nelson Field: a successful application of a development geoseismic model in North Sea exploration
The Nelson Field: a successful application of a development geoseismic model in North Sea exploration
复制标题
尼尔森油田：开发地震模型在北海勘探中的成功应用
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
D. Rhodes
中科院分区：
文献类型：
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作者：
M. Whyatt;J. M. Bowen;D. Rhodes
摘要英国北海22/11区块有着悠久的勘探历史，20多年来共有6家公司钻了4口威尔斯井。1985年，在邻近的蒙特罗斯和阿布罗斯油田进行地质地震研究后，企业公司认识到该区块的潜在勘探潜力。由于1967年钻探的第一口井22/11-1的古新世储层质量差，石油和天然气显示储量不大，当时被认为是不经济的。古新世的真正储集潜力似乎被忽视了。Enterprise追求新的开发理念，首先通过在该区块进行耕作，然后通过一系列复杂的商业资产和面积交易收购该区块的唯一勘探权。通过应用现代和古代海底扇类似物，并详细了解当地地质情况，Enterprise在反射地震数据上识别出了易出砂的“通道”，并确定22/11-1井已经穿透了“通道间”相。随后的钻探证实了这一模式，并导致发现了纳尔逊油田，该油田位于被认为是成熟油气区的中心。地质地震模型，勘探概念和储层地质的晚古新世浊积岩碎屑岩成藏区，以说明如何详细的生产地质/地球物理模型可以显着有益于勘探。
Abstract UK North Sea Block 22/11 has had a long history of exploration involving six companies drilling four wells over two decades. The latent exploration potential of the block was recognized by Enterprise in 1985 following geoseismic studies carried out in the neighbouring Montrose and Arbroath Fields. The modest reserves attributed to the oil and gas shows encountered in the poor quality Palaeocene reservoir of the first well, 22/11-1, drilled in 1967 were considered uneconomic at the time. The true reservoir potential of the Palaeocene appeared to have been overlooked. Enterprise pursued the new play concept, firstly by farming in and thereafter by acquiring the sole exploration rights of the block in a series of complex commercial asset and acreage deals. Applying modern and ancient submarine fan analogues with a detailed appreciation of local geology, Enterprise recognized sand-prone ‘channels’ on reflection seismic data and established that the 22/11-1 well had penetrated an ‘interchannel’ facies. Subsequent drilling confirmed this model and led to the discovery of the Nelson Field, in the centre of what is considered to be a mature hydrocarbon province. The geoseismic model, exploration concepts and reservoir geology of this late Palaeocene turbidite clastic play are presented to illustrate how a detailed production geological/geophysical model can significantly benefit exploration.