高青油田北区沙四段沉积特征与油气富集条件

Sedimentary characteristics and oil and gas accumulation conditions in the fourth member of Shahejie formation in the north region of Gaoqing oil field

综合利用地质、地震、测井及分析化验等资料,对高青油田北区沙四段构造、沉积体系、储层成岩作用、储集性能、烃源岩发育特征及输导体系等进行了研究,研究结果表明:高青油田北区沙四段发育三角洲前缘砂体,沉积过程中砂体受到大气和水的淋滤作用,从而促使了次生孔隙的大量发育,改善了砂体的储集性能;博兴洼陷生成的油气通过高青断裂带附近的输导体系向高青油田北区沙四段运移并聚集成藏。该研究为高青油田下一步的勘探提供了有利依据,具有一定的指导意义。

Comprehensive research is applied to sedimentary system of Es_4 in the north region of Gaoqing oil field through making use of data on geology,well logging and sample testing synthetically,and the result shows that the sedimentary system is delta front.With leaching effect,a lot of secondary porosity came into being in the sandstone of Es_4.The sandstone in this area became the high-quality reservoir.Oil and gas generated from Boxing sub-sag hydrocarbon source rocks migrated to the north region of Gaoqing oil field along the passage system near Gaoqing fault belt.This study provides basis to further exploration in Gaoqing oil field.