【摘要】：分散液態(tài)烴裂解氣資源評(píng)價(jià)涉及五方面內(nèi)容,可概括為"五步法"的定量評(píng)價(jià)方法。步驟一:源內(nèi)和源外液態(tài)烴的分配比例和數(shù)量研究。模擬實(shí)驗(yàn)及實(shí)際地質(zhì)樣品統(tǒng)計(jì)相結(jié)合的研究結(jié)果,烴源巖中滯留烴的數(shù)量可觀,受有機(jī)質(zhì)豐度、類(lèi)型、演化程度、烴源巖巖性、物性以及與儲(chǔ)集層的配置關(guān)系等因素影響�？傮w特征烴源巖排油率變化于20%~80%,以TOC 2%為界,排油率為50%上下;高TOC、類(lèi)型優(yōu)質(zhì)的烴源巖排油率高。步驟二:源外分散液態(tài)烴的主要分布、富集區(qū)研究。通過(guò)數(shù)值模擬正演研究液態(tài)烴的優(yōu)勢(shì)運(yùn)移通道及分布富集區(qū);同時(shí),通過(guò)熱成因?yàn)r青的數(shù)量統(tǒng)計(jì)及分布、樣品的熒光特征反演研究分散液態(tài)烴的分布富集區(qū)。步驟三:不同賦存狀態(tài)液態(tài)烴裂解成氣的轉(zhuǎn)化率研究。模擬地質(zhì)條件下碳酸鹽巖、泥巖和砂巖中的分散液態(tài)烴裂解生氣實(shí)驗(yàn),反映碳酸鹽巖、泥巖和砂巖對(duì)液態(tài)烴的裂解均有催化作用,作用強(qiáng)度依次減弱,主生氣期對(duì)應(yīng)的Ro值分別為1.2%~3.2%、1.3%~3.4%和1.4%~3.6%;超壓抑制液態(tài)烴裂解生氣,達(dá)到相同轉(zhuǎn)化率溫度滯后30℃左右。步驟四:研究區(qū)含油氣系統(tǒng)研究:加強(qiáng)液態(tài)烴晚期規(guī)模生氣和有效成藏的要素和關(guān)鍵時(shí)刻的分析。步驟五:分散液態(tài)烴裂解氣的定量評(píng)價(jià)以及資源評(píng)估。以深層海相天然氣成因研究為基礎(chǔ)建立的分散液態(tài)烴"五步法"定量評(píng)價(jià)方法,實(shí)現(xiàn)了中國(guó)深層古老烴源巖源內(nèi)分散液態(tài)烴裂解氣、源外分散液態(tài)烴裂解氣、古油藏裂解氣、干酪根降解氣的整體、系統(tǒng)評(píng)價(jià)。
[Abstract]:The evaluation of dispersed liquid hydrocarbon cracking gas resources involves five aspects, which can be summarized as the quantitative evaluation method of "five-step method". Step 1: study on the distribution ratio and quantity of liquid hydrocarbons in and out of the source. The results of simulation experiment and actual geological sample statistics show that the amount of retained hydrocarbons in source rocks is considerable, which is affected by the abundance, type, evolution degree of organic matter, lithology of source rocks, physical properties and the relationship with reservoir configuration. The oil discharge rate of the overall characteristic source rocks varies from 20% to 80%, which is bounded by TOC 2%, and the oil discharge rate is about 50%, and the oil discharge rate of source rocks with high TOC, type and high quality is high. Step 2: the main distribution and enrichment area of dispersed liquid hydrocarbons outside the source. The dominant migration channels and distribution enrichment areas of liquid hydrocarbons are studied by numerical simulation forward modeling, and the distribution and enrichment areas of dispersed liquid hydrocarbons are studied by quantitative statistics and distribution of thermal bitumen and fluorescence characteristic inversion of samples. Step 3: study on the conversion of liquid hydrocarbon pyrolysis into gas in different occurrence states. The cracking gas experiment of dispersed liquid hydrocarbon in carbonate rock, mudstone and sandstone under simulated geological conditions reflects that carbonate rock, mudstone and sandstone all have catalytic effect on the cracking of liquid hydrocarbon, and the intensity of action weakens in turn. The Ror values of the main gas generation period are 1.2% 3.2%, 1.3% 3.4% and 1.4% 3.6%, respectively. Overpressure can inhibit the cracking gas of liquid hydrocarbon, and the same conversion temperature lags about 30 鈩，

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