济阳拗陷临南—钱官屯地区烃类微渗漏特征及异常成因

Characteristics of hydrocarbon micro-leakage and its abnormal genesis in Linnan-Qianguantun area,Jiyang depression,Shandong,China

探讨济阳拗陷临南—钱官屯地区化探异常成因机制。通过对临南—钱官屯地区不同构造单元油井和干井中酸解烃特征和微渗漏方式的研究,结合石油地质条件,从油气成藏的角度分析烃类运移、聚集及其微渗漏散失的全过程。结果表明研究区北部地层中以扩散为主,南部以渗透为主或者不存在微渗漏效应,揭示渗漏源和盖层条件是烃类微渗漏的主控因素。临南—钱官屯地区近地表化探异常模式为"渗漏源影响下的断控异常模式",钱斜14井以北盖层条件和渗漏源条件都最优越,是研究区内最有利的勘探区。

This paper studies the genetic mechanism of the hydrocarbon geochemical exploration anomaly in the Linnan-Qianguantun area, Jiyang depression, Shandong, China. From the perspective of hydrocarbon formation, the paper analyses the whole process of hydrocarbon migration, accumulation, and micro-leakage by studying the acidolysis hydrocarbon characteristics and hydrocarbon micro-leakage in oil wells and dry wells in different structural units in the Linnan- Qianguantun area. The result shows that the microqeakage is dominated by diffusive effect in the northern strata and the penetration or non-micro-leakage in the southern strata in this study area, and the main control factors of the hydrocarbon micro-leakage are the leakage source and the cap rock conditions. In the Linnan-Qianguantun area, the abnormal pattern of the hydrocarbon geochemical exploration near the surface is ＂fault-controlled abnormal pattern with the affection of the leakage source . condition the study In the area to the north of Well Qianxie 14, the cap rock condition and the seepage source are the most promising conditions. So, this area is the most favorable exploration targel in area.