油气化探异常的稳定性及油气地质意义

油气化探利用地球化学方法寻找油气，具有直接、快速、有效、成本低的特点，已在油气勘探实践中取得了较好的效果，并在一定时期得到了较为广泛的应用。但油气化探作为一门新兴学科，在许多方面仍存在不足，其中异常的稳定性与重现性是制约油气化探推广应用的认识障碍。以河南泌阳洼陷（井楼-古城油田）和山东临邑洼陷南斜坡（临南油田）的实际地球化学测量资料为基础，通过已知油气藏上方不同期次（同年）、不同时期的油气化探异常特征的对比，从油气化探指标组合关系、结构特征、剖面显示、油气异常的平面分布等方面证实油气化探异常存在较好的稳定性，表明利用油气化探技术方法寻找油气是可行的，并进一步证实了油气化探在油气勘探中的应用前景。

Stability and petroleum geological significance of hydrocarbon geochemical Anomaly

Hydrocarbon geochemical exploration (here referring to near-surface geochemical exploration) is a kind of technique for prospecting oil and gas by means of geochemical methods. With the advantage of directness, quickness and cost-effectiveness, this technique has achieved good results in oil and gas exploration practices, and has been widely applied for a certain period. On the other hand, as a new subject, this technique also has some imperfectness in many aspects, in which unreliable stability and frequent repeat of the anomaly are the main obstacles. Based on the geochemical exploration data collected from Biyang sag (Jinglou-Gucheng oilfield) in Henan Province and the southern slope of Linyi sag (Linnan oilfield) in Shandong Province, the authors compared the characteristics of the geochemical exploration anomalies over the existing oil and gas reservoirs of different stages (same years) and different times in this paper, and verified that the geochemical exploration anomaly has favorable stability in the aspects of geochemical indicators combination, structure features, profile illustration and plain distribution of the geochemical anomalies. The results have supported the feasibility of hydrocarbon geochemical exploration technique in oil and gas prospecting, and suggested that this technique will have a bright prospect of wider application in hydrocarbon exploration.