断裂输导油气运移形式分布区预测方法及其应用

发布时间：2018-06-24 23:27

本文选题：断裂输导 + 油气运移形式　；参考：《沉积学报》2017年03期

【摘要】：为研究断裂在油气成藏与分布中的作用,在断裂输导油气运移形式划分的基础上,对断裂输导油气运移形式所需条件和分布区预测方法进行了研究,结果表明:断裂输导油气运移形式不同,所需条件也不同,断裂垂向向上输导油气运移形式所需的条件主要是断裂位于成熟源岩区内,断裂垂向向下输导油气运移形式所需条件是断裂位于具有供油气能力的超压成熟源岩区内,断裂侧向连接输导油气运移形式所需条件是断裂位于盖层断接厚度大于和等于其油气侧向运移所需的最小断接厚度区内,断裂侧向变径输导油气运移形式所需条件是断裂位于盖层断接厚度小于其油气侧向运移所需的最小断接厚度区内。通过断裂分布区成熟烃源岩区或具有供油气能力的超压成熟源岩区叠合和油气侧向运移区、油气非侧向运移区及断裂分布区叠合,分别建立了断裂垂向向上、垂向向下和侧向连接、变径输导油气运移形式分布区的预测方法,并将其分别应用于渤海湾盆地冀中坳陷留楚地区东二、三段、松辽盆地三肇凹陷扶杨油层和渤海湾盆地冀中坳陷文安斜坡沙二段断裂输导油气运移不同形式分布区预测中,其预测结果与目前留楚地区东二、三段、三肇凹陷扶杨油层和文安斜坡沙一段和沙二段已发现油气分布相吻合,表明该方法用于断裂输导油气运移形式分布区预测是可行的。
[Abstract]:In order to study the role of faults in the formation and distribution of oil and gas, on the basis of the division of migration patterns of oil and gas in fault, the conditions and methods for predicting the distribution of oil and gas migration in fault are studied. The results show that different migration forms of oil and gas from faults require different conditions. The main conditions for vertical upward migration of oil and gas in faults are that the faults are located in mature source rocks. The condition of the vertical downward migration of oil and gas is that the fault is located in the overpressure mature source rock area with the ability to supply oil and gas. The condition for lateral connection of fault migration is that the fault is located in the region of minimum fault thickness required for lateral migration of oil and gas, which is greater than or equal to the fault thickness of caprock. The condition of lateral migration of oil and gas is that the fault is located in the region of the minimum fault thickness required by the lateral migration of oil and gas. Through the superimposition of mature source rocks in fault distribution area or overpressure mature source rock region with oil and gas supply capacity and lateral migration of oil and gas, oil and gas non-lateral migration zones and fault distribution areas are superimposed, and the vertical direction of faults is established, respectively. The vertical downward and lateral connection, and the prediction method of the distribution area of the oil and gas migration patterns with variable diameter are applied to the second and third member of the east part of the Jizhong depression in the Bohai Bay basin, respectively. The prediction results of Fuyang reservoir in Sanzhao sag of Songliao Basin and the different distribution areas of hydrocarbon migration in the second and third sections of the second and third member of the Sha member of Wenan Slope in the Jizhong Depression of Bohai Bay Basin are compared with those of the east second and third member of the present Liuchu area. The distribution of oil and gas in the first and second member of Shahejie formation of Fuyang reservoir and Wenan slope in Sanzhao depression is consistent, which indicates that this method is feasible to predict the distribution of oil and gas migration patterns of fault.
【作者单位】：东北石油大学地球科学学院;中国石油华北油田勘探开发研究院;
【基金】：国家自然科学基金项目(41372153)~~
【分类号】：P618.13

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