浅谈吸附烃找油气方法中的干扰因素

吸附烃是油气化探的主要指标之一，它直接反映从油气藏运移出来的烃类气体。应用吸附烃法找地下油气藏应排除地层、地形、地貌景观的干扰异常。不同地层上方土壤中吸附烃含量变化可能与地层沉积时间、沉积环境有关；不同地形、地貌景观下土壤中吸附烃含量异则是由于地化环境（ｐＨ值等）所致。消除这些干扰因素的最简单方法是分区统计背景值，或者用不同异常下限或用衬度值圈定异常。经校正后的异常能更真实可靠地反映油气藏，已在四

SOME DISTURBING FACTORS IN OIL GAS EXPLORATION BY USING OF THE ABSORBED HYDROCARBON METHOD

The absorbed hydrocarbon is one of the major indicators in the oil gas geochemical exploration.it can directly reflect the hydrocarbon gas transmited out from oil gas accumulation.The disturbing anomalies from strata,topography and landforms should be eliminated from exploration of the under ground oil gas accumulation by using of the absorbed hydrocarbon method.The content ranges of absorbed hydrocarbon in soils above the different strata can be related to the sedimentary time and enviornment of the strata.Differences in contents of the absorbed hydrocarbon in soils in different topography and landforms are resulted by geochemical enviornment (pH value etc.).The simplest way to eliminate disturbing factors is part statistics of the background values or delineating the anomalies by using the different anomaly thresholds or contrast values.The corrected anomalies can be more real and reliable to reflect the oil gas accumulation,and achieve better results in Sichuan,Guangxi and Guangdong province.