The Forties Field, Block 21/10, 22/6a, UK North Sea
The Forties Field, Block 21/10, 22/6a, UK North Sea
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The Forties Field，区块 21/10, 22/6a，英国北海
DOI：
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发表时间：
1991
期刊：
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通讯作者：
J. Wills
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文献类型：
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作者：
J. Wills
Forties Field位于阿伯丁东北180公里（112英里）处，主要位于英国许可证区块21/10。它是在1970年发现的，当时一口勘探井在背斜结构内的古新世砂岩中发现了碳氢化合物。四口评价井威尔斯证实了一个主要油田的存在，面积约90平方公里（35平方英里），深度约2000米（6500英尺）。储层位于两个主要的富砂海底扇序列中沉积的厚的晚古新世砂岩中。该油田自1975年9月以来一直在生产石油。储油罐油初始地质储量（STOIIP）计算为4343 MMBBL，原始储量估计为2470 MMBBL，总采收率为57%。该油田在1981年脱离了日产50万桶的平台产量，到1989年中期，产量下降到日产25万桶左右。经过14年的生产，该领域已生产超过20亿台STB。剩余储量约为500 MMBBL，其中包括通过人工举升进行的开采。预计油田使用寿命将延长到2000年以后。1976年开始向含水层注水，至今仍在以390 000 BWPD的平均速率注水。下伏含水层也对压力支持有很大贡献。目前，该油田有103口可用威尔斯井，81口生产井和22口注水井。
Abstract The Forties Field is located 180 km (112 miles) ENE of Aberdeen, predominantly in UK Licence Block 21/10. It was discovered in 1970, when an exploration well encountered hydrocarbons in Palaeocene sandstone within an anticlinal structure. Four appraisal wells confirmed the existence of a major oilfield, with an area of approximately 90 sq km (35 sq miles) at a depth of approximately 2000 m (6500 ft). The reservoir occurs in thick Late Palaeocene sandstones deposited in two major sand-rich submarine fan sequences. The field has been producing oil since September 1975. Stock Tank Oil Initially in Place (STOIIP) has been calculated as 4343 MMBBL, and original reserves estimated as 2470 MMBBL, representing an overall recovery of 57%. The field came off plateau production of 500 000 BOPD in 1981, and by mid-1989 production had declined to about 250 000 BOPD. After fourteen years production, the field has produced more than 2 billion STB. Remaining reserves are about 500 MMBBL which includes recovery via artificial lift. Field life has been projected to extend beyond the year 2000. Water injection into the aquifer commenced in 1976, and continues at the present day at an average rate of 390 000 BWPD. There is also a significant contribution to pressure support from the underlying aquifer. At present there are 103 available wells in the field, 81 producers and 22 injectors.