本文關(guān)鍵詞： 復(fù)雜儲層 氣藏 儲量評價(jià) 不整合面 孔隙 裂縫　出處：《海洋地質(zhì)與第四紀(jì)地質(zhì)》2017年01期 　論文類型：期刊論文

【摘要】：M20凝析氣田是一個(gè)非常復(fù)雜的異常高壓凝析氣田,儲集層是由沙河街組一段生物碎屑白云巖、沙河街組二段白云質(zhì)砂礫巖,以及中生界火山巖和元古界混合花崗巖疊置而成的塊狀儲集體。氣藏儲集空間共5大類12小類,形成3類主要儲集巖,分別為沙河街組孔隙型、中生界孔隙+微裂縫型和元古界裂縫+孔隙型儲層。儲量計(jì)算中,基于儲層分布特征、儲集類型和油、氣分布狀況,制定了三項(xiàng)儲量計(jì)算單元?jiǎng)澐衷瓌t;進(jìn)而,確定了儲量計(jì)算關(guān)鍵參數(shù):根據(jù)中生界儲層與不整合面的關(guān)系,確定出儲層孔隙度和凈毛比的變化趨勢;采用中子-密度交會法和阿爾奇公式分別計(jì)算沙河街、中生界和元古界基質(zhì)儲層部分的孔隙度和含油、含氣飽和度;采用裂縫狀態(tài)判別經(jīng)驗(yàn)公式、電成像測井、面比率法和裂縫含水飽和度經(jīng)驗(yàn)公式等方法分別計(jì)算裂縫的孔隙度和含油、含氣飽和度。沙河街和中生界地層只計(jì)算儲層孔隙中的地質(zhì)儲量,元古界地層則按孔隙和裂縫分別計(jì)算地質(zhì)儲量。
[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.
【作者單位】： 中海油研究總院;
【分類號】：TE328

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本文編號：1494142