东沙隆起珠江组生物礁类型及勘探方向

doi:10.7623/syxb2013S2003

石油学报 ›› 2013, Vol. 34 ›› Issue (增刊二): 24-31.DOI: 10.7623/syxb2013S2003

东沙隆起珠江组生物礁类型及勘探方向

米立军¹, 曾清波², 杨海长²

1. 中国海洋石油有限公司勘探部北京 100010;
2. 中海油研究总院北京 100027

收稿日期:2013-07-29 修回日期:2013-11-26 出版日期:2013-12-25 发布日期:2014-01-15
通讯作者: 米立军，男，1964年4月生，1986年获山东海洋学院学士学位，2007年获中国石油大学（北京）博士学位，现为中国海洋石油有限公司勘探部副总经理，主要从事石油地质学、沉积学及油气勘探综合研究工作。Email：milijun@cnooc.com.cn
作者简介:米立军，男，1964年4月生，1986年获山东海洋学院学士学位，2007年获中国石油大学（北京）博士学位，现为中国海洋石油有限公司勘探部副总经理，主要从事石油地质学、沉积学及油气勘探综合研究工作。Email：milijun@cnooc.com.cn
基金资助:
国家重点基础研究发展计划（973）项目（2009CB219400）和国家重大科技专项（2011ZX05025）资助。

Types of organic reef and exploration direction in Zhujiang Formation of Dongsha uplift

MI Lijun¹, ZENG Qingbo², YANG Haichang²

1. Department of Exploration, CNOOC Limited, Beijing 100010, China;
2. CNOOC Research Institute, Beijing 100027, China

Received:2013-07-29 Revised:2013-11-26 Online:2013-12-25 Published:2014-01-15

摘要/Abstract

摘要：

珠江组生物礁是东沙隆起重要的油气勘探领域，勘探潜力巨大，目前已发现了多个油气田与含油气构造。综合古地理位置与形态，将珠江组生物礁划分为台缘礁、台内点礁、环礁、块礁及陆棚塔礁5种类型，不同类型生物礁的外部形态与内部充填不同。平面上，台缘礁呈串珠状分布于隆起中南部台缘带，点礁、环礁、块礁呈不规则星点状分布于台地内部。古地貌背景决定了生物礁类型，台缘礁发育于早期地貌坡折上，位于油气从凹陷向隆起运移的必经之路，成藏条件最好，邻近惠州凹陷及白云凹陷的礁体是下一步勘探的突破方向。点礁、塔礁的发育受控于早期断洼的翘倾作用，规模较小，早期断洼的供烃能力尚不明确，靠近北部凹陷带的礁体是勘探的优先选择。块礁、环礁围绕台内局部隆起分布，已发现的块礁油气田位于隆起中南部的油气运移主路径上，远离该区的礁体缺乏油气来源，勘探风险较大。

关键词: 生物礁, 古地貌, 成藏条件, 珠江组, 东沙隆起

Abstract:

The organic reef in Zhujiang Formation of Dongsha uplift is an important area with great potential for oil and gas exploration, where several oil & gas fields and hydrocarbon bearing structures have been discovered. Based on a comprehensive consideration of the palaeogeographic location and landform, the organic reef can be classified into five types, including platform margin reef, intraplatformal point reef, atoll, massive reef and tower reef in shelf zone. Each type of reef has various external form and internal fillings. In a planar view, the platform margin reef in string-of-beads pattern is distributed in platform margin of the central and southern uplift; the rest in an irregular star-like pattern are distributed in the interior of the platform. The types of reefs are determined by palaeogeomorphic environment. Platform margin reef is developed in the early slope break zone, which is a necessary pathway for hydrocarbon migration from sag to uplift, and thus has the best reservoir-forming conditions. The reefs adjacent to Huizhou sag and Baiyun sag are expected to be the next exploration breakthrough. As influenced by the tilted fault blocks during the early rifting stage, the patch and tower reefs are developed in a small scale. Due to uncertain hydrocarbon supplying ability of the early fault depression, the reefs nearby northern sags are given the first priority for exploration. Atoll and massive reef are mainly distributed around regional uplifts in the platform. However, the oil & gas fields discovered in massive reef are located at the major hydrocarbon migration pathway of mid-southern uplift, far from which the reefs are lack of hydrocarbon sources and have a high exploration risk.

Key words: organic reef, palaeogeomorphology, reservoir-forming conditions, Zhujiang Formation, Dongsha uplift

中图分类号:

TE122.2

米立军, 曾清波, 杨海长. 东沙隆起珠江组生物礁类型及勘探方向[J]. 石油学报, 2013, 34(增刊二): 24-31.

MI Lijun, ZENG Qingbo, YANG Haichang. Types of organic reef and exploration direction in Zhujiang Formation of Dongsha uplift[J]. ACTA PETROLEI SINICA, 2013, 34(增刊二): 24-31.

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东沙隆起珠江组生物礁类型及勘探方向

Types of organic reef and exploration direction in Zhujiang Formation of Dongsha uplift

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