从源盖断时空匹配关系剖析乌尔逊凹陷南二段油气前景

通过乌尔逊凹陷南一段源岩、大一段盖层和断裂在时空上匹配关系研究得到，大一段盖层与南一段源岩空间分布匹配关系好，有利于南二段油气大规模分布。大一段盖层与南一段源岩时间匹配关系好，可为南二段油气运移提供大量油气。南一段源岩与断裂第二次活动期匹配关系相对较好，有利于南二段油气大规模运移。大一段盖层与断裂第二次活动期匹配关系相对较好，有利于南二段油气聚集与保存。盖源质量空间匹配关系和源盖断空间匹配关系表明，苏仁诺尔构造带最有利于油气聚集成藏，是乌尔逊凹陷南二段油气勘探的最有利地区，盖源质量匹配关系较好区域内的断裂带是南二段油气勘探的较有利地区。

Analysis of Oil and Gas Prospecting of K1n2 in Wuerxun Depression from Time-Space Matching Relation among Source Rock, Cap Rock and Faults

Through the study of time-space matching relation among K_1n_1 source rock, K_1d_1 cap rock and faults in Wuerxun depression, this paper considers the distribution matching relation between K_1d_1 cap rock and K_1n_1 source rock to be the best, and it is favorable for oil and gas from K_1n_1 source rock to distribute in great scale. The time matching relation between K_1n_1 source rock and secondary active period of faults is good, it is favorable for oil and gas from K_1n_1 source rock to migrate into K_1n_2 in great scale. The time matching relation between K_1d_1 cap rock and secondary active period of faults is good, it is favorable for oil and gas to accumulate and preserve in K_1n_2. The quality matching relation between K_1n_1 source rock and K_1d_1 cap rock and the space matching relation among K_1n_1 source rock, K_1d_1 cap rock and faults indicate that Surennuoer fracture zone is the most favorable area for oil and gas in K_1n_2 to accumulate and form oil and gas reservoirs. Following it, the faulted fracture zone with better seal-source quality matching relation is the favorable area for exploration in K_1n_2.