珠江口盆地陆丰凹陷A油田储层质量差异及低渗储层主控因素

发布时间：2018-02-01 15:48

本文关键词： 储层质量成岩作用低渗透储层陆丰凹陷珠江口盆地　出处：《石油与天然气地质》2017年03期 　论文类型：期刊论文

【摘要】：南海珠江口盆地自投入油气勘探开发以来,关于该区新近系海相储层的研究已日趋成熟,但是由于深层的勘探开发起步较晚,加之海上井数的限制,深层储层质量的研究相对薄弱,尚不能有效的指导油气田勘探与开发。为此,以南海珠江口盆地陆丰凹陷A油田为例,从微观孔隙结构和宏观物性对比了新近系珠江组滨岸储层和古近系文昌组辫状河三角洲储层的质量差异性,并分析了文昌组低孔、低渗储层的主控因素,以期指导该类油田开发方案的设计。研究表明:A油田储层质量宏观上受控于构造沉积作用,沉积作用一定程度上控制了后期的成岩作用,是造成珠江组与文昌组储层质量差异的主要原因;文昌组低孔低渗储层的主要控制因素为成岩作用,成岩作用减弱了原始沉积组构对储层质量的控制作用,使储层物性变差,并对后期油田开发造成影响。
[Abstract]:Since the Pearl River mouth Basin in the South China Sea has been put into oil and gas exploration and development, the study on Neogene marine reservoirs has become more and more mature, but the deep exploration and development has started late and the number of offshore wells has been limited. The study of deep reservoir quality is relatively weak and can not effectively guide the exploration and development of oil and gas fields. Therefore, A oilfield in Lufeng Sag, Pearl River mouth Basin, South China Sea, is taken as an example. The quality differences of the shoreline reservoir of the Pearl River formation of Neogene and the braided river delta reservoir of the Wenchang formation of Paleogene are compared from the microscopic pore structure and the macroscopic physical properties, and the main controlling factors of the low porosity and low permeability reservoirs in the Wenchang formation are analyzed. The study shows that the reservoir quality is controlled macroscopically by tectonic sedimentation and sedimentary processes control the late diagenesis to some extent. It is the main reason of reservoir quality difference between Zhujiang formation and Wenchang formation. Diagenesis is the main controlling factor of low porosity and low permeability reservoir in Wenchang formation. Diagenesis weakens the control effect of original sedimentary fabric on reservoir quality, makes reservoir physical property worse, and affects the later oil field development.
【作者单位】：中海石油(中国)有限公司深圳分公司;中国海洋石油总公司;
【基金】：国家科技重大专项(2016ZX05024-004)
【分类号】：P618.13
【正文快照】： 南海珠江口盆地经过近30年的勘探,新近系大型构造圈闭所剩无几。为了拓宽勘探视野,近几年将勘探的重心逐渐转向了古近系。随着近期在陆丰凹陷古近系文昌组发现工业油流以来,A油田复杂的砂体叠置关系、高地层水电阻率以及低渗储层的问题一度成为珠江口盆地的关注的热门。陆丰地

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