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根据新的三维地震资料解释结果,探讨了辽中凹陷金县1-1油田的构造特征,并在此基础上结合该油田各油气层中油气的物理化学特征,分析了金县1-1油田的油气成藏过程,建立了该油田的油气成藏模式,对该区后期油气勘探具有重要意义。研究结果表明:①辽中1号断裂穿过辽中凹陷,在金县1-1地区形成了走滑构造转换带,该转换带在平面上具有走滑双重构造特征。辽中1号断裂在该区的不同部位的表现形式有所差异。②该区圈闭的形成时期早于烃源岩大量生烃时期。③由于东营组一段的抬升剥蚀,断层活动性强,大气水下渗,金县1-1油田早期充注的原油受到了生物降解作用,油气藏遭到破坏,并且东区油气藏的破坏程度比西区大。由于天然气运移过程中的分馏效应,该油田东块天然气的干燥系数高于西块,浅部高于深部。
Based on the results of new 3D seismic data interpretation, the structural characteristics of the Jinshi 1-1 oilfield in the central part of Liaozhong depression are discussed. Based on the physical and chemical characteristics of oil and gas in each oil and gas reservoir in this area, Of the hydrocarbon accumulation process, the establishment of the oil and gas accumulation pattern of the oil and gas exploration in the late stage of the region is of great significance. The results show that: ①The fault of Liaozhong No. 1 passed through the central part of Liaozhong depression, forming a strike-slip tectonic transition zone in the area of Jinxian 1-1 with dual strike-slip features on the plane. Liaozhong No. 1 fault in different parts of the area of the performance of different forms. ② The formation of traps in this area preceded the period of large hydrocarbon generation in source rocks. ③ Due to the uplifting and denudation in the first section of Dongying Formation and strong fault activity and atmospheric water infiltration, the crude oil infused early in Jinxian 1-1 oilfield was biodegraded, the oil and gas reservoirs were destroyed, and the destruction degree of the eastern oil and gas reservoir was Western District. Due to the fractionation effect during natural gas migration, the drying coefficient of natural gas in the east block of the oil field is higher than that of the western block, and the shallow part is higher than the deep part.