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受盆地复杂的石油地质条件影响,珠江口盆地(西部)地震属性的地质含义异常复杂,难以表征储层及含油气性,基于此,文章总结了珠江口盆地(西部)地震属性难以有效应用三个方面:(1)盆地地层呈“千层饼”式互层发育,单层厚度小,难以达到地震分辨率;(2)受压实作用影响及低速泥岩的存在,砂泥岩岩石物理规律不清;(3)局部地区为含灰质地层,进一步复杂化该区砂泥岩岩石物理规律.文章指出了研究人员在该区地震属性应用中的几个误区,在此基础上,提出了针对该区复杂石油地质条件下的地震属性分析思路,并成功运用到预探井的含油气预测中,取得了一定的效果,研究思路值得进一步推广.
Affected by the complex petroleum geology in the basin, the seismic attribute of the Pearl River Mouth Basin (western) is extremely complex in geological meaning and it is difficult to characterize the reservoirs and oil and gas. Based on this, it is difficult to effectively apply the seismic attributes of the Pearl River Mouth Basin (western) Aspects: (1) The strata in the basin are developed with “Melaleuca” interbedded layers with small single layer thickness, which makes it difficult to reach the seismic resolution. (2) Due to the compaction effect and the existence of low-velocity mudstone, The law is unclear; (3) The local area is gray-bearing strata, which further complicates the petrophysical laws of the sandstone and mudstone in the area.The paper points out some misunderstandings of the researchers in the application of seismic attributes in this area, and on this basis, The analysis of seismic attributes under complex petroleum geology in this area has been successfully applied to the prediction of oil-bearing gas in pre-exploratory wells. Some achievements have been obtained and the research ideas deserve further promotion.