珠江口盆地岩性油气藏类型及形成条件——以惠西南地区中新统珠江组为例

发布时间：2018-05-29 14:02

本文选题：珠江口盆地 + 惠州凹陷　；参考：《海相油气地质》2017年02期

【摘要】：珠江口盆地惠西南地区新近系珠江组发育古珠江三角洲前缘的连续型尖灭砂体和受波浪或潮流等改造再沉积的独立型尖灭砂体。根据研究区珠江组岩性油气藏的勘探实践,综合砂体类型与构造背景,把珠江组岩性油气藏分为3类:上倾尖灭型岩性油气藏,主要发育在东沙隆起区侧翼的鼻状构造带;背斜-上倾尖灭复合型岩性油气藏,主要发育在凹陷内部的古潜山构造带;断层-上倾尖灭复合型岩性油气藏,主要发育在断层下降盘的逆牵引构造带以及由倾向相反的正断层所夹持的凸起带。珠江组岩性油气藏为下生上储型,古近系文昌组提供了充足的油源,有利的构造背景和由断层、不整合面、渗透性砂岩及构造脊联合形成的油气垂向、横向运移路径是岩性油气藏成藏的重要条件。
[Abstract]:The Neogene Pearl River formation in the southwestern part of the Pearl River mouth basin developed a continuous sharp sand extinguishing body in the front edge of the paleo-Pearl River Delta and an independent desilting body redeposited by waves or tidal currents. According to the exploration practice of lithologic reservoirs of Zhujiang formation in the study area, the lithologic reservoirs of Zhujiang formation are classified into three types: the updip pinnacle type lithologic reservoirs, mainly developed in the nose structure belt of the flank of Dongsha uplift area; The anticline-updip pinnacle compound lithologic reservoir is mainly developed in the paleo-buried hill structural zone in the sag, the fault-updip pinnacle compound lithologic reservoir, It is mainly developed in the reverse traction structural belt of the downplane of the fault and the protruding zone held by the normal fault with the opposite tendency. The lithologic reservoirs of the Zhujiang formation are of lower generation and upper reservoir type. The Wenchang formation of the Paleogene provides sufficient oil source, favorable tectonic background and vertical direction of oil and gas formed by the combination of faults, unconformities, permeable sandstone and structural ridges. The lateral migration path is an important condition for reservoir formation in lithologic reservoirs.
【作者单位】：中海石油(中国)有限公司深圳分公司;
【基金】：“十三五”国家科技重大专项“南海东部海域勘探新领域及关键技术”(编号:2016ZX05024-004)部分成果
【分类号】：P618.13

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