Stratigraphic framework of productive carbonate buildups
Stratigraphic framework of productive carbonate buildups
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高产碳酸盐岩堆积的地层格架
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
P. Lehmann
中科院分区：
文献类型：
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作者：
S. M. Greenlee;P. Lehmann
产烃碳酸盐岩建隆在地质时间和地层环境的相对狭窄的窗口内被发现。由于油气聚集是前沿盆地和成熟盆地的共同勘探目标，因此了解其地层产状有助于更准确地进行勘探。根据世界范围的调查，大多数生产发生在地质时期的孤立时期：中志留世-晚志留世，中泥盆世晚期和晚泥盆世，晚宾夕法尼亚世和早二叠世，晚白垩世，古新世和中新世。作者认为，根据地史分析和盆地充填地层模式，可以预测成藏组合成功的许多因素。广泛的生油层和厚的造隆的沉积与二级海平面上升相一致。其他主要控制的时间分布的堆积包括造礁生物类型，矿物学和古纬度。地史分析表明，在可容纳空间快速增加的最早期之前或期间，对应于生产力增长的时期。在此期间，大陆架边缘向陆地移动，堆积逐渐受到更大的面积限制。堆积最终无法跟上高速率的可容纳空间增加，并且通常被海退楔内的斜坡状体的远趾覆盖，海退楔在随后的可容纳空间增加速率较低的时期沉积。更多的结果是丘状储层碳酸盐和深海密封页岩的地层并列。该盆地充填位置占已知建造形成的碳氢化合物的70%以上。沉积在上覆海退楔中的造斜率通常较低，并容易出现密封问题。«少
Hydrocarbon-productive carbonate buildups are found within a relatively narrow window of geologic time and stratigraphic settings. Because buildups are common exploration objectives in frontier and mature basins, an understanding of their stratigraphic occurrence permits them to be more accurately explored. Based on a worldwide survey, most production occurs in isolated periods of geologic time: Middle Silurian-Late Silurian, late Middle and Late Devonian, Late Pennsylvanian and Early Permian, Late Cretaceous, Paleocene, and Miocene. The authors results suggest that many factors of successful buildup plays are predictable on the basis of geohistory analysis and of basin-filling stratal patterns. Deposition of extensive source beds and thick buildups coincide with second-order eustatic rises. Other primary controls on the temporal distribution of buildups include reef-building organism type, mineralogy, and paleolatitude. Geohistory analysis indicates that periods immediately prior to or during the earliest portion of rapid increases of accommodation correspond to times of productive buildup growth. During this time, shelf margins step landward and buildups become progressively more areally restricted. Buildups eventually are unable to keep pace with high rates of accommodation increase and often are overlain by distal toes of clinoforms within regressive wedges deposited during subsequent periods with lower rates of accommodation increase. Themore » result is a stratigraphic juxtaposition of mounded reservoir carbonate and deep-marine sealing shale. This basin-fill position accounts for over 70% of known buildup-reservoired hydrocarbons. Buildups deposited in overlying regressive wedges are often lower relief and prone to seal problems.« less