海上成熟探区中浅层岩性油气藏分布特点与勘探策略——以珠江口盆地惠州凹陷为例  

Distribution characteristics and exploration strategy of middle-shallow lithologic reservoirs in offshore mature exploration areas: a case study on Huizhou sag in the Pearl River Mouth Basin

作　　者：米立军 张向涛 丁琳 杜家元 张韶琛 Mi Lijun;Zhang Xiangtao;Ding Lin;Du Jiayuan;Zhang Shaochen(Shenzhen Branch of CNOOC Ltd)

机构地区：[1]中海石油(中国)有限公司深圳分公司

出　　处：《中国石油勘探》2018年第6期10-19,共10页China Petroleum Exploration

基　　金：国家科技重大专项"南海东部海域勘探新领域及关键技术"(2016ZX05024-004)

摘　　要：海上油气勘探难度很大,尤其是中浅层岩性油气藏的勘探,其难点主要有常规地震剖面分辨率较低、砂体叠置关系多样性条件下岩性尖灭线的准确识别与刻画,以及如何切实有效地实现岩性油气藏储量规模化等现实问题。以勘探较为成熟的珠江口盆地惠州凹陷为例,通过系统总结该地区中浅层岩性油气藏的分布特点,提出了勘探成熟区岩性油气藏的勘探策略。惠州凹陷岩性油气藏勘探实践表明,岩性油气藏具有靠近富烃洼陷分布、与构造油藏伴生、受海泛泥岩控制以及在油气主力运移通道上汇集的特点,基于此认识,在地质、地球物理、经济评价"三位一体"统筹化勘探原则下,提出了以高品质地震资料为基础、精细地质认识为引导、先进的地球物理技术为手段,坚持勘探开发一体化的勘探策略。该策略为惠州凹陷惠州21-A老油田以及惠州25-B油田周边新的岩性油气藏发现提供了重要的指导作用。It is quite difficult to explore offshore oil and gas reservoirs, and especially the offshore lithologic reservoirs in middle and shallow layers. And the exploration difficulties are mainly how to identify and describe the lithologic pinch-out boundary when the superimposed relationship of sandbodies is diverse and the resolution of conventional seismic profile is lower and how to discover large-scale reserves of lithologic reservoirs practically and effectively. Huizhou sag in the Pearl River Mouth Basin is a relatively mature exploration area, and it was taken as an example to systematically summarize the distribution characteristics of middle-shallow lithologic reservoirs in this area. And accordingly the exploration strategy for lithologic reservoirs in mature explorations areas was put forward. The exploration practice of lithologic reservoirs in Huizhou sag shows that they are usually distributed near the hydrocarbon rich sub-sags, co-existed with structural reservoirs controlled by marine flooding mudstone, and accumulated in the main hydrocarbon migration paths. Based on these characteristics, the exploration strategy of integrated exploration and development was put forward according to the overall-planning exploration principle with geology, geophysics and economic evaluation as a whole. This exploration strategy takes high-quality seismic data as the base, detailed geological cognition as the guidance and advanced geophysical technology as the method. It provides the important guidance for the discovery of new lithologic reservoirs in the periphery of Huizhou 21-A and Huizhou 25-B oil fields in Huizhou sag.

关 键 词：珠江口盆地 惠州凹陷 海上成熟探区 岩性油气藏 分布特点 勘探策略 

分 类 号：TE112.3[石油与天然气工程—油气勘探]