本文選題：HS + TSR�。� 參考：《中國(guó)科學(xué):地球科學(xué)》2017年02期

【摘要】：硫化氫形成機(jī)理對(duì)海相高硫天然氣的勘探開(kāi)發(fā)關(guān)系重大.研究的關(guān)鍵是直接測(cè)定自然界不同賦存狀態(tài)(氣、液、固)含硫物質(zhì)的化學(xué)組成和同位素組成.為此,建立了利用MAT271型氣體質(zhì)譜計(jì)在線分析天然氣中H_2S含量和不同含硫物質(zhì)硫同位素組成的方法,開(kāi)展了四川盆地包括烴源巖、儲(chǔ)集巖、天然氣、水溶氣在內(nèi)不同含硫物質(zhì)的分析;對(duì)比分析結(jié)果表明,烴源巖中的含硫物質(zhì)主要由BSR形成,天然氣、水溶氣和儲(chǔ)集層中的含硫物質(zhì)主要由TSR形成;對(duì)含硫天然氣的碳同位素組成進(jìn)行了系統(tǒng)分析,發(fā)現(xiàn)高含硫天然氣甲、乙烷穩(wěn)定碳同位素普遍呈倒轉(zhuǎn)特征,其主要原因應(yīng)與TSR有關(guān);四川盆地不同層位的含硫物質(zhì)硫同位素組成的地質(zhì)實(shí)際分析表明,天然氣中H_2S的硫同位素組成與同一層位或相鄰層位的膏巖或鹵水的硫同位素組成具有繼承關(guān)系,表明H_2S形成和聚集具有自源-近源特征.
[Abstract]:The formation mechanism of hydrogen sulfide is of great importance to the exploration and development of marine high sulfur natural gas. The key to this study is to directly determine the chemical and isotopic compositions of sulfur-containing substances in different natural states (gas, liquid and solid). For this reason, a method of on-line analysis of H _ 2S content in natural gas and sulfur isotopic composition of different sulfur containing substances by MAT271 gas mass spectrometer was established, and the Sichuan Basin was developed including hydrocarbon source rock, reservoir rock and natural gas. The results show that the sulfur content in source rock is mainly formed by BSR, while natural gas, water soluble gas and sulfur in reservoir are mainly formed by TSR. The carbon isotopic composition of sulfur-bearing natural gas is systematically analyzed. It is found that the stable carbon isotopes of high-sulfur natural gas A and ethane are generally reversed, and the main reason should be related to TSR. The actual geological analysis of sulfur isotopic composition in different layers of Sichuan Basin shows that the sulfur isotopic composition of H _ 2S in natural gas is inherited from the sulfur isotopic composition of gypsum or brine in the same horizon or adjacent layer. It is shown that the formation and accumulation of H2S are self-source-near-source.
【作者單位】： 中國(guó)石化石油勘探開(kāi)發(fā)研究院;中國(guó)石化油氣成藏重點(diǎn)實(shí)驗(yàn)室;中國(guó)石化石油勘探開(kāi)發(fā)研究院無(wú)錫石油地質(zhì)研究所;中國(guó)科學(xué)院蘭州油氣資源研究中心;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(編號(hào):2012CB214801) 石油化工聯(lián)合基金項(xiàng)目(編號(hào):40839910)資助
【分類(lèi)號(hào)】：P618.13;P597

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本文編號(hào)：1782792