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长期以来,梁家楼—小营地区沙二段砂泥岩薄互层沉积被认为是形成于沙三段沉积早期的东营三角洲的继承发育。通过对该区古地形、地貌、沉积特征及古物源体系的分析,对沉积体系的时空展布特征及油气成藏规律形成了新的认识:该区沙二段具有多物源体系的特征,发育了三角洲、滨浅湖滩坝及斜坡型近源扇三角洲等多种沉积类型;构造(断裂)、岩性、岩相共同控制了油气藏的形成。正确、客观的地质认识是指导该区沙二段油气勘探的关键,对构造、地层和沉积成藏规律的综合分析为该区今后的油气勘探提供了新的思路。
For a long time, the thin interbedded sediments of sand-shale in the second member of Liangjiatou-Xiaoying area have been considered as the inheritance and development of the Dongying delta formed in the early deposition of the third member of Shahejie formation. Based on the analysis of palaeogeomorphology, geomorphology, sedimentary characteristics and source rocks system, the spatial and temporal distribution characteristics of the sedimentary system and the laws of hydrocarbon accumulation are formed. The second member of Shahejie Formation has the characteristics of multi-source system, Developed a variety of sedimentary types, such as delta, coastal shallow lake dams and ramp-type near-source fan delta; tectonism (fracture), lithology and lithofacies jointly controlled the formation of oil and gas reservoirs. Correct and objective geological understanding is the key to oil and gas exploration in the second member of Shahejie formation in this area. The comprehensive analysis of the laws of tectonics, strata and sedimentary accumulation provides a new idea for the future exploration of oil and gas in this area.