复杂储层凝析气藏储量评价

发布时间：2018-02-07 10:17

  本文关键词： 复杂储层 气藏 储量评价 不整合面 孔隙 裂缝　出处：《海洋地质与第四纪地质》2017年01期 　论文类型：期刊论文

【摘要】：M20凝析气田是一个非常复杂的异常高压凝析气田,储集层是由沙河街组一段生物碎屑白云岩、沙河街组二段白云质砂砾岩,以及中生界火山岩和元古界混合花岗岩叠置而成的块状储集体。气藏储集空间共5大类12小类,形成3类主要储集岩,分别为沙河街组孔隙型、中生界孔隙+微裂缝型和元古界裂缝+孔隙型储层。储量计算中,基于储层分布特征、储集类型和油、气分布状况,制定了三项储量计算单元划分原则;进而,确定了储量计算关键参数:根据中生界储层与不整合面的关系,确定出储层孔隙度和净毛比的变化趋势;采用中子-密度交会法和阿尔奇公式分别计算沙河街、中生界和元古界基质储层部分的孔隙度和含油、含气饱和度;采用裂缝状态判别经验公式、电成像测井、面比率法和裂缝含水饱和度经验公式等方法分别计算裂缝的孔隙度和含油、含气饱和度。沙河街和中生界地层只计算储层孔隙中的地质储量,元古界地层则按孔隙和裂缝分别计算地质储量。
[Abstract]:M20 condensate gas field is a very complicated abnormal high pressure condensate gas field. The reservoir is composed of bioclastic dolomite in the first member of Shahejie formation, dolomite in the second stage of Shahejie formation, and dolomitic gravel in the second member of Shahejie formation. The gas reservoir space consists of 5 types and 12 subclasses, forming 3 types of main reservoir rocks, respectively, which are of the pore type of Shahejie formation. In the calculation of reserves, based on reservoir distribution characteristics, reservoir types and distribution of oil and gas, three principles of reserve calculation unit are established. The key parameters of reserves calculation are determined as follows: according to the relationship between Mesozoic reservoir and unconformity surface, the change trend of porosity and net / gross ratio of reservoir is determined, the Neutron-density intersection method and Archie formula are used to calculate Shahejie, respectively. Porosity, oil and gas saturation in Mesozoic and Proterozoic matrix reservoirs, empirical formula for judging fracture state, electric imaging logging, The surface ratio method and the empirical formula of water saturation of fractures are used to calculate the porosity, oil and gas saturation of fractures, respectively. The Proterozoic strata calculate the geological reserves according to pores and fractures respectively.
【作者单位】： 中海油研究总院;
【分类号】：TE328

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中国期刊全文数据库 前10条

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本文编号：1494142