油源断裂输导油气通道演化形式的研究方法及其应用

为了研究含油气盆地下生上储式油源断裂附近油气分布规律，在不同时期油源断裂输导油气通道及影响因素研究的基础上，通过确定油源断裂伴生裂缝可能发育部位和地层脆性发育部位，识别其活动期输导油气通道。通过断裂填充物泥质含量和填充物输导油气所需的最小泥质含量，识别其停止活动后输导油气通道，二者结合建立了一套油源断裂输导油气通道演化形式的研究方法，并将其应用于渤海湾盆地冀中坳馅廊固凹陷大柳泉地区旧州断裂在沙三中-下亚段内输导油气通道演化形式的研究中，结果表明：旧州断裂在沙三中-下亚段内共发育4种输导通道演化形式，其中一直输导通道演化形式仅分布在F₁断裂东部局部和F₈断裂的东部端部；先输导后不输导通道演化形式主要分布在F₇断裂西部、F₈断裂中西部及东部和F₉断裂处；先不输导后输导通道演化形式主要分布在除东部局部的F₁断裂、F₇断裂的中东部；一直不输导通道演化形式主要分布在F₇断裂中部、F₇断裂和F₈断裂交界处及F₈断裂东部。一直输导和先输导后不输导通道演化形式分布处或附近应是沙三中-下亚段油气成藏的有利部位，与目前旧州断裂附近沙三中-下亚段已发现油气分布相吻合，表明该方法用于研究油源断裂输导油气通道演化形式是可行的。

Research method and application of evolution form of oil and gas passage of oil source fault

In order to study the distribution law of oil and gas near the underground source and upper reservoir type oil source faults in the petroliferous basin, based on the research on the oil and gas transport channels and influencing factors of oil source faults in different periods, the oil and gas transport channels in the active period are identified by determining the possible development positions of associated fractures and formation brittleness. Through the shale content of fault fillings and the minimum shale content required by fillings to transport oil and gas, the oil and gas transport channels after their activities are identified. A set of research methods on the evolution form of oil source fault oil and gas transport channels are established.They are applied to the study of the evolution forms of oil and gas transport channels of Jiuzhou fault in Daliuquan area, Langgu Sag, Jizhong Depression, Bohai Bay Basin. The results show that there are four evolution forms of transport channels in Jiuzhou fault in the middle and lower sub member of Es;, of which one direct transport channel evolution form is only distributed in the eastern part of F;fault and the eastern end of F;fault;The evolution form of the channel of first conducting and then not conducting is mainly distributed in the west of F;fault, the middle west and east of F;fault and F;fault;The evolution form of first non-transport and then transport channel is mainly distributed in the middle east of F;fault and F;fault except in the east;The evolution form of non-conducting channel is mainly distributed in the middle of F;fault, the junction of F;fault and F;fault and the east of F;fault. The distribution of evolution forms of all-time transport and first transport and then no transport channels should be the favorable parts for oil and gas accumulation in the middle and lower sub member of Es;, which is consistent with the oil and gas distribution found in the middle and lower sub member of Es;near Jiuzhou fault, indicating that this method is feasible to study the evolution characteristics of oil and gas transport channels of oil source faults.