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为了更加准确地研究油源断裂在下生上储油气成藏中的作用,在油源断裂类型及其特征研究的基础上,通过不同油源断裂和同一条油源断裂不同时期和不同部位活动特征、断面产状与油气分布之间关系分析,对油源断裂输导油气能力及油气富集的差异性进行了研究,结果表明:油源断裂输导油气能力及油气富集的差异性主要表现在以下3个方面:1不同油源断裂同一时期的输导油气能力及油气富集存在差异性,活动强度大的油源断裂输导油气能力强,有利于油气聚集,其附近油气富集;而活动强度小的油源断裂输导能力弱,不利于油气聚集,其附近油气不富集.2同一条油源断裂不同时期的输导油气能力及油气富集存在差异性,强活动时期油源断裂输导油气能力强,有利于油气聚集,对油气富集所起作用越大,应是油气成藏的主要时期;而弱活动时期油源断裂输导油气能力弱,不利于油气聚集,对油气富集所起作用越小,不是油气成藏的主要时期.3同一条油源断裂不同部位的输导油气能力及油气富集存在差异性,活动速率大的油源断裂凸面脊发育部位输导油气能力强,有利于油气聚集,是油气成藏的有利部位;而活动速率小的油源断裂非凸面脊发育部位输导油气能力弱,不利于油气聚集,不是油气成藏的有利部位.
In order to study more accurately the role of oil source fracture in the subsurface hydrocarbon accumulation, based on the study of oil source fracture types and their characteristics, through the analysis of the activity characteristics of different oil source faults and different oil source faults , The cross-section shape and the distribution of oil and gas, the differences of oil and gas transport capability and oil-gas enrichment in oil source fracture are studied. The results show that the difference of oil and gas transport ability and oil-gas enrichment is mainly manifested In the following three aspects: 1 different oil source fracture oil and gas migration during the same period of ability and oil and gas accumulation are different, active activity of the oil source fault fracture strong conductivity, is conducive to the accumulation of oil and gas, oil and gas enrichment in the vicinity; However, the low activity intensity of the oil source has weak fracture conductivity and is not conducive to the accumulation of oil and gas, and the oil and gas in the vicinity are not enriched.2 The oil and gas transport capability and oil and gas accumulation in different periods of the same oil source fracture are different, The source fracture has the strong capability of transporting oil and gas, which is good for oil and gas accumulation. The larger the contribution to oil and gas accumulation, it should be the main period of oil and gas accumulation. In the weak period, Which is beneficial to oil and gas accumulation and has less effect on oil and gas accumulation and is not the main period of oil and gas accumulation.3 Different oil and gas transport capability and oil and gas accumulation in different parts of the same oil source fracture have different oil source fracture Convex ridge developmental site has strong ability to transport oil and gas, which is good for oil and gas accumulation, which is a favorable site for oil and gas accumulation. However, low active oil migration and weak hydrocarbon development in non-convex ridge developmental site are not favorable for oil and gas accumulation. The favorable parts of Tibet.