分散液态烃裂解气资源评价方法
发布时间：2019-08-20 09:31
【摘要】：分散液态烃裂解气资源评价涉及五方面内容,可概括为"五步法"的定量评价方法。步骤一:源内和源外液态烃的分配比例和数量研究。模拟实验及实际地质样品统计相结合的研究结果,烃源岩中滞留烃的数量可观,受有机质丰度、类型、演化程度、烃源岩岩性、物性以及与储集层的配置关系等因素影响。总体特征烃源岩排油率变化于20%~80%,以TOC 2%为界,排油率为50%上下;高TOC、类型优质的烃源岩排油率高。步骤二:源外分散液态烃的主要分布、富集区研究。通过数值模拟正演研究液态烃的优势运移通道及分布富集区;同时,通过热成因沥青的数量统计及分布、样品的荧光特征反演研究分散液态烃的分布富集区。步骤三:不同赋存状态液态烃裂解成气的转化率研究。模拟地质条件下碳酸盐岩、泥岩和砂岩中的分散液态烃裂解生气实验,反映碳酸盐岩、泥岩和砂岩对液态烃的裂解均有催化作用,作用强度依次减弱,主生气期对应的Ro值分别为1.2%~3.2%、1.3%~3.4%和1.4%~3.6%;超压抑制液态烃裂解生气,达到相同转化率温度滞后30℃左右。步骤四:研究区含油气系统研究:加强液态烃晚期规模生气和有效成藏的要素和关键时刻的分析。步骤五:分散液态烃裂解气的定量评价以及资源评估。以深层海相天然气成因研究为基础建立的分散液态烃"五步法"定量评价方法,实现了中国深层古老烃源岩源内分散液态烃裂解气、源外分散液态烃裂解气、古油藏裂解气、干酪根降解气的整体、系统评价。
[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，
本文编号：2528530
[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，
本文编号：2528530
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