贾培蒙,张向涛,陈维涛,等. 珠江口盆地惠州凹陷惠州21古潜山的形成演化及其对深层油气成藏的控制[J]. 海洋地质前沿,2021,37(12):27-37. DOI: 10.16028/j.1009-2722.2021.187
    引用本文: 贾培蒙,张向涛,陈维涛,等. 珠江口盆地惠州凹陷惠州21古潜山的形成演化及其对深层油气成藏的控制[J]. 海洋地质前沿,2021,37(12):27-37. DOI: 10.16028/j.1009-2722.2021.187
    JIA Peimeng, ZHANG Xiangtao, CHEN Weitao, LIU Pei, LUO Ming, WANG Wenyong. TECTONIC EVOLUTION OF HUIZHOU 21 BURIED HILL AND ITS CONTROL OVER DEEP OIL ACCUMULATIONS IN THE HUIZHOU SAG OF PEARL RIVER MOUTH BASIN[J]. Marine Geology Frontiers, 2021, 37(12): 27-37. DOI: 10.16028/j.1009-2722.2021.187
    Citation: JIA Peimeng, ZHANG Xiangtao, CHEN Weitao, LIU Pei, LUO Ming, WANG Wenyong. TECTONIC EVOLUTION OF HUIZHOU 21 BURIED HILL AND ITS CONTROL OVER DEEP OIL ACCUMULATIONS IN THE HUIZHOU SAG OF PEARL RIVER MOUTH BASIN[J]. Marine Geology Frontiers, 2021, 37(12): 27-37. DOI: 10.16028/j.1009-2722.2021.187

    珠江口盆地惠州凹陷惠州21古潜山的形成演化及其对深层油气成藏的控制

    TECTONIC EVOLUTION OF HUIZHOU 21 BURIED HILL AND ITS CONTROL OVER DEEP OIL ACCUMULATIONS IN THE HUIZHOU SAG OF PEARL RIVER MOUTH BASIN

    • 摘要: 惠州21构造为具有基底古隆起背景的潜山披覆构造,是珠江口盆地惠州凹陷油气勘探的重点地区。目前在该构造中浅层已发现惠州21油气田,但深层尚未获得商业油气藏发现,分析古潜山的形成演化对于指导构造深层油气勘探具有重要的意义。利用地震资料和周边已钻井资料,运用平衡地质剖面技术,对惠州21古潜山的地质结构和构造演化过程进行了分析,并探讨构造演化过程对深层油气成藏的控制。结果表明,惠州21古潜山的演化过程主要经历了晚中生代早白垩世岩浆侵入花岗岩基底侵位、新生代古新世火山喷发隆起、始新世断层差异活动隆升、渐新世—中新世定型4个阶段;提出构造演化对深层成藏的控制主要表现在古潜山火山岩储层的改造、裂陷期沉积体系的发育和油气运移聚集3个方面;指出文昌组和神狐组具备发育规模优质储层的条件,是该区域深层重要的油气勘探对象。

       

      Abstract: The Huizhou 21 structure, a drape structure over a buried hill, is a key area for oil exploration in the Huizhou Sag of the Pearl River Mouth Basin. However, the Huizhou 21 oil and gas field is the only one discovered in the middle and shallow layers, no commercial hydrocarbon discoveries have been detected so far in the deep. As we know, the analysis of structural evolution of the buried hill is the key to deep-layer oil exploration. Based on seismic data and drilling results, using the balanced geological profiling as a tool, the geological structure and tectonic evolution process of Huizhou 21 buried hill and the influence of tectonic evolution process on hydrocarbon accumulation are carefully studied in this paper. It is found that the Huizhou 21 buried hill tectonic belt has experienced four stages of evolution: magmatic intrusion and granite basement emplacement in Early Cretaceous, volcanic eruption in Paleocene, uplifting and differentiated faulting in Eocene and getting into shape in Oligo-Miocene. The control of tectonic evolution over deep reservoir formation is mainly manifested in three aspects: the reformation of volcanic reservoir, the development of sedimentary system in rifting period and the migration and accumulation of oil and gas. There are high quality and large scale reservoirs in the Wenchang and Shenhu Formations of the study area, and they are important oil exploration targets in the deep.

       

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