摘要
珠江口盆地东部经历了30多年的油气勘探和四轮油气资源评价,历轮评价的方法和结果存在较大的差异,有必要开展油气资源的动态评价。按照国际通行的资源概念,以预测油气地质资源量和剩余地质资源量作为评价工作的主线,综合应用盆地模拟法、油田规模序列法和圈闭法进行了珠江口盆地东部油气资源评价,并从评价单元、构造单元、层系、埋深、油品、水深、储层物性等方面分析了油气资源的分布特征,结果表明:珠江口盆地东部油气资源丰富,石油总地质资源量约64×108t,天然气总地质资源量约27×1011m3;油气总探明率低,总石油探明率为12.86%,总天然气探明率为7.11%,勘探潜力大;油气地质资源分布不均,整体呈现北油南气的分布格局,其中石油地质资源主要分布于新近系和古近系,以浅层、中深层为主,浅水区多于深水区,以中轻质油为主,在中高渗储层中分布居多,而天然气地质资源量主要分布于古近系和新近系,以中深层和浅层为主,深水区占绝对优势,低渗—中高渗储层均有分布。本文综合法获得的珠江口盆地东部油气资源的动态评价结果及分布特征,可为该地区勘探评价和勘探方向优选提供重要参考。
The eastern Pearl River Mouth basin has experienced more than 30 years of exploration and 4 rounds of resource evaluations with great difference in methods and results, so it is necessary to carry out dynamic evalua-tion. According to international petroleum resource concept to predict geological resources and remaining geological resources, the integration of basin simulation method, field size sequence method and trap method is adopted in the resource evaluation. The distribution characteristics of resources are also analyzed in terms of evaluation unit, tec-tonic unit, strata, depth, oil property, sea water depth and reservoir physical property. The results show that the eastern Pearl River Mouth basin is rich of petroleum resources, with 64 × 10^ 8t oil geological resources, and 27 × 10nm3 natural gas geological resources. The rate of proven resources is low and the proved ratios of oil and gas are 12. 86% and 7. 11%, respectively. Oil and gas geology resources are unevenly distributed with the pattern of oil in the north and gas in the south. Oil is mainly mid-light, and largely distributes in the Neogene and Paleogene, in the shallow and mid-deep layers, middle to high permeability reservoirs, and more shallow water area than deep water area. The resources of natural gas mainly distributes in the Paleogene and Neogene, in the mid-deep and shallow layers, low to mid-high permeability reservoirs and deep water area. The dynamic evaluation results and distribution characteristics of oil and gas resources in the eastern Pearl River Mouth basin can provide reference for exploration evaluation and optimization of exploration directions in this area.
出处
《中国海上油气》
CAS
CSCD
北大核心
2017年第5期1-11,共11页
China Offshore Oil and Gas
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)"部分研究成果
