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酸解烃技术是油气化探的一个重要方法,在常规的油气化探中被普遍应用,然而多解性一直影响其应用效果。本文选择济阳凹陷垛石桥地区作为研究区,利用改进的酸解烃技术,分析研究区已知背景区和产油气区土壤中的酸解烃含量及其碳同位素特征,以验证改进酸解烃技术在复杂含油气区块油气化探工作中的有效性,为油气化探提供高精度的技术方法。研究结果表明,垛石桥地区地表土壤酸解烃中甲烷的含量受干扰因素较多,与下伏油气藏没有明显的对应关系;而乙烷和丙烷等重烃含量与下伏油气藏的对应关系较好,可以较好地揭示深部油气运移的贡献。另外,该地区土壤酸解烃的组成特征指示其深部油气源以油藏为主,部分为凝析油藏,与实际地质情况较为吻合,表明改进的酸解烃技术可以作为复杂含油气区块指示深部油气藏的有效化探方法。
Acid hydrolysis is an important method of oil and gas geochemical exploration of oil and gas in the conventional geochemical exploration is widely used, however, the versatility of the application has always been affected. In this paper, the Qieshiqiao area of Jiyang Depression was selected as the study area. By using the improved acid-hydrolysis technology, the acid-dissolved hydrocarbon content and carbon isotope characteristics in the known background areas and oil-producing areas were analyzed to verify the improvement of acid hydrolysis The effectiveness of hydrocarbon technology in oil and gas geochemical exploration in complex oil and gas blocks provides a high-precision technical method for geochemical exploration of oil and gas. The results show that the content of methane in the acid-solvated hydrocarbon of surface soil in Duokushiqiao area is disturbed by many factors and has no obvious correspondence with the underlying oil and gas reservoirs. However, the contents of heavy hydrocarbons such as ethane and propane correspond with the corresponding underlying oil and gas reservoirs The relationship is good, which can better reveal the contribution of deep oil and gas migration. In addition, the characteristics of soil acid-hydrolyzed hydrocarbons in the area indicate that the deep oil and gas sources are mainly oil reservoirs and some are condensate reservoirs, which are in good agreement with the actual geological conditions, indicating that the improved acid-extracting hydrocarbon technology can be used as a complex petroleum- An effective geochemical exploration method to indicate deep reservoirs.