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油裂解型气源灶是一种特殊的气源灶,是优质生烃母质在成气过程中派生出的。烃源岩生成的油主要有3种赋存形式:源内分散状液态烃、源外分散状液态烃和源外富集型液态烃。3种赋存状态液态烃的数量及分配比例受内因和外因多种因素控制,就排油率而言,有机碳含量分别为0.67%、0.62%和10.6%的泥岩、灰岩和油页岩,最大排油率分别为45%、55%和80%。原油与不同介质配样的生气动力学实验表明,不同介质条件下甲烷的生成活化能分布有差异,碳酸盐岩对油裂解条件影响最大,可大大降低其活化能,导致原油裂解热学条件降低,体现为油裂解温度的降低;泥岩次之,砂岩影响最小。碳酸盐岩、泥岩和砂岩对油的催化裂解作用依次减弱,不同介质条件下主生气期对应的Ro值:纯原油1.5%～3.8%;碳酸盐岩中的分散原油1.2%～3.2%;泥岩中的分散原油1.3%～3.4%;砂岩中的分散原油1.4%～3.6%。油裂解型气源灶是一种中间体,可以直观看到的是原生气源灶和由此形成的气藏,而对油裂解型气源灶的赋存形式、分布范围、成气数量和储量规模等问题,只能通过正演和反演的研究去确定且相互映证。正演研究以塔里木盆地中下寒武统为例,原始生油量2232.24×108t,剩余油量806.21×108t,油裂解气量106.95×1012m3。反演研究以川东北飞仙关组白云岩中油裂解气为例,圈定的古油藏面积约735km2,古油藏原油数量45×108t,油裂解气量及油裂解气资源量分别为2.72×1012m3和1.36×1012m3。
Oil pyrolysis gas stove is a special gas stove, is the source of high-quality raw materials derived from gas into the gas generated. There are three main types of oil in the source rock: the source-dispersed liquid hydrocarbon, the source-extra-dispersed liquid hydrocarbon and the source-enriched liquid hydrocarbon. The number and distribution proportion of liquid hydrocarbons in the three kinds of occurrences are controlled by many factors of internal and external factors. For the oil discharge rate, the contents of organic carbon are 0.67%, 0.62% and 10.6% respectively. Mudstone, limestone and oil shale , The maximum oil discharge rates were 45%, 55% and 80% respectively. The kinetic experiments of crude oil and different mediums show that there are differences in the activation energy distribution of methane formation under different media conditions. Carbonate rocks have the greatest influence on the oil cracking conditions, which can greatly reduce the activation energy and reduce the thermal cracking conditions of crude oil , Reflecting the decrease of oil cracking temperature; the second is mudstone, and the least is sandstone. Carbonate rock, mudstone and sandstone have the following effects on the catalytic cracking of oil: Weak Ro: 1.5% -3.8% of pure crude oil and 1.2% -3.2% of dispersed crude oil in carbonate rock under different media conditions. 1.3% to 3.4% of the dispersed crude oil in mudstone, and 1.4% to 3.6% of the dispersed crude oil in sandstone. Oil cracked gas stove is an intermediate, you can visually see is the original gas stove and gas reservoir formed, and the oil cracked gas stove in the form of occurrence, distribution, the amount of gas and Reserves and other issues, can only be determined by forward modeling and inversion studies and mutual proof. Taking the middle and lower Cambrian in the Tarim Basin as an example, the original oil production is 2232.24 × 108t, the remaining oil is 806.21 × 108t, and the amount of oil cracking is 106.95 × 1012m3. The inversion study takes the oil pyrolysis gas of the Feixianguan Formation dolomite in northeastern China as an example. The area of the paleo-oil reservoir delineated is about 735km2, the number of crude oil in the ancient reservoir is 45 × 108t, the amount of oil cracked gas and the amount of oil cracked gas are 2.72 × 1012m3 And 1.36 × 1012m3.