【摘要】 在缺少钻井资料的低勘探程度地区进行烃源岩评价和油气前景预测的难度较大。由于烃源岩与非烃源岩之间在平均振幅、平均能量等地震属性上存在明显差别,据此建立了一套利用层序地层学及地震地层学识别烃源岩,根据地震速度谱信息去除烃源岩体中砂质含量,由烃源岩体提取的地震属性与实测烃源岩有机碳含量等地化参数的对应关系,定量预测烃源岩有机碳含量的方法。利用该方法预测和评价了武清凹陷大孟庄洼槽沙三段中、下亚段和沙四段上亚段3个层系的烃源岩,其有机碳含量分布表现为西高东低,南高北低的特点,进而确定研究区南部的京24井—务古1井为有利的油气聚集区。更多还原

【Abstract】 It is rather difficult to conduct source rock evaluation in low degree of exploration area for shortage of drill-well data. Based on differences in the average amplitudes and energies between the source rocks and non-source rocks, an estimating method for identification of the source rocks is established by research on the sequence and seismic stratigraphy on the seismic profiles, i. e. to remove sandy contents in the source rock interval by seismic velocity spectrum plot, to establish relationship between the seismic attributes and TOC contents measured from the source rocks, and to estimate the source rocks on the seismic profiles. Therefore, source rocks in the upper forth member, lower and middle third member of the Shahejie Formation are estimated by this method. The TOC contents are distributed in the studied area as "west high and east low, and south high and north low" , the belt in the southern studied area from well Jing-24 to well Wugu-1 is estimated as favorable place for oil and gas accumulation as high TOC contents in the source rocks.更多还原