本文選題：塔西南坳陷 + 奧陶系　； 參考：《石油地球物理勘探》2017年04期

【摘要】：塔西南坳陷奧陶紀構造活動與油氣成藏關系密切。開展了近15×10~4km~2的地震資料構造解析,恢復了不同時期奧陶系鷹山組頂面構造形態(tài),厘清了奧陶系頂面構造高點遷移特征,明確了奧陶紀構造活動與油氣成藏的關系。研究認為,塔西南坳陷奧陶系頂面歷經北傾向南傾和東傾向西傾的"蹺蹺板"式改造過程,發(fā)育調整遷移型古隆起,不利于油氣的富集保存,構造活動的樞紐帶是次生油氣聚集帶;其次,構造活動在奧陶系形成不同期次的斷背斜圈閉,其中晚海西期和晚喜馬拉雅期定型圈閉內發(fā)現油氣,斷裂是油氣垂向運移的通道;第三,奧陶系鷹山組上段風化殼儲層主要分布在斷裂帶,鷹山組下段內幕白云巖儲層則分布較廣,在靠近直立的走滑斷裂附近最為發(fā)育,地震剖面上表現為"串珠"狀反射;第四,奧陶系油氣發(fā)現主要分布在南北向和東西向構造調整的樞紐帶內,其中坳陷中段的東西向構造活動樞紐帶是下一步油氣勘探的有利區(qū)帶,近期羅斯2井獲得高產工業(yè)氣流。
[Abstract]:The Ordovician tectonic activity in southwest Tarim depression is closely related to oil and gas accumulation. The structural analysis of nearly 15 脳 10~4km~2 seismic data has been carried out, and the structural morphology of the top surface of the Yingshan formation of the Ordovician has been restored in different periods, the characteristics of the high point migration of the top surface of the Ordovician have been clarified, and the relationship between the tectonic activity of the Ordovician and the hydrocarbon accumulation has been clarified. It is considered that the top surface of Ordovician system in the southwest depression of the Tarim Basin has undergone a seesaw transformation process of north to south and east to west, which is not conducive to the accumulation and preservation of oil and gas. The secondary hydrocarbon accumulation zone is the pivot zone of tectonic activity, secondly, tectonic activity forms faulted diagonal traps in different stages of the Ordovician, in which oil and gas are found in late Hercynian and late Himalayan traps, and faults are channels for vertical migration of oil and gas. Third, the weathering crust reservoir of the upper member of Yingshan formation of Ordovician is mainly distributed in the fault zone, and the inside dolomite reservoir of the lower member of Yingshan formation is widely distributed, which is the most developed near the vertical strike-slip fault, and the seismic profile is characterized by "beaded" reflection. Fourthly, the discovery of Ordovician oil and gas is mainly distributed in the pivot belt of the structural adjustment in the north-south and the east-west direction, in which the EW-trending tectonic active hub zone in the middle part of the depression is the favorable zone for the next step of oil and gas exploration. A high-yield industrial airflow was recently obtained in well Ross 2.
【作者單位】： 中國石油勘探開發(fā)研究院西北分院;
【基金】：中國石油天然氣股份有限公司重大科技專項(041012120005)資助
【分類號】：P534.42;P618.13

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【共引文獻】

相關期刊論文 前10條

1 崔海峰;田雷;劉軍;張年春;;塔西南坳陷奧陶紀構造活動與油氣成藏[J];石油地球物理勘探;2017年04期

2 莊新兵;顧憶;邵志兵;尤東華;丁勇;萬e，

本文編號：2066989