莱州湾凹陷中央构造带断层活动性及其控藏作用

发布时间：2018-06-13 21:28

本文选题：断层活动性 + 断层封闭性　；参考：《大庆石油地质与开发》2017年06期

【摘要】：莱州湾凹陷中央构造带油气藏分布具有"纵向上分层,平面上分带"的特征。为研究同一构造带上油气藏分布差异性,利用前人对断层封闭性评价的方法对莱州湾凹陷中央构造带上控藏断层的封闭性进行了系统评价,并采用了地球化学手段和盆地模拟手段将构造演化史与其油气成藏史相结合,厘清了莱州湾凹陷中央构造带的油气成藏规律。研究结果表明:断层活动史与油气充注过程相匹配是莱州湾凹陷中央构造带油气成藏的关键因素,早期活跃的断层活动有利于油气的向上运移聚集成藏,晚期活动较弱的断层相对利于油气的保存;不同断层封闭性的差异导致了油气藏平面上分布的差异性,同一断层垂向封闭性的不同控制了油气纵向的分层性。在勘探过程中应结合断层的封堵性来确定勘探目的层位,降低勘探风险。
[Abstract]:The distribution of oil and gas reservoirs in the central structural belt of Laizhou Bay sag is characterized by "vertical stratification and flat zonation". In order to study the distribution difference of oil and gas reservoirs in the same structural belt, the sealing properties of the faults in the central structural belt of Laizhou Bay sag were systematically evaluated by using the method of evaluation of fault sealing by predecessors. The geochemical and basin simulation methods are used to combine the tectonic evolution history with the oil and gas accumulation history to clarify the oil and gas accumulation law of the central structural belt in the Laizhou Bay depression. The results show that the matching of fault activity history with oil and gas filling process is the key factor for oil and gas accumulation in the central structural belt of Laizhou Bay depression, and the early active fault activity is favorable to the upward migration and accumulation of oil and gas. The difference of sealing property of different faults leads to the difference of distribution on the plane of oil and gas reservoir, and the vertical sealing of the same fault controls the vertical stratification of oil and gas. In the process of exploration, the target horizon of exploration should be determined and the exploration risk should be reduced by combining fault plugging.
【作者单位】：中海石油(中国)有限公司天津分公司勘探开发研究院;
【基金】：国家科技重大专项“渤海辽东湾地区潜在富烃凹陷成藏研究与有利勘探方向预测”(2016ZX05024-002-006)
【分类号】：P618.13

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