On the basis of comprehensive analyses on hydrocarbon accumulation conditions in the four representative foreland basins, Kuqa basin, southern Junggar basin, western Sichuan basin and northern margin of Qaidam basin, some conclusions are made as follows;
On the basis of comprehensive analyses on hydrocarbon accumulation conditions in the four representative foreland basins, Kuqa basin, southern Junggar basin, western Sichuan basin and northern margin of Qaidam basin, some conclusions are made as follows;
在综合分析和对比库车、准南、柴北缘和川西等具有代表性的前陆盆地的油气成藏条件的基础上指出，中西部前陆盆地具有以煤系为主的多套源岩，发育非均质储集层，多套多封闭性的盖层，以背料为主要圈闭；断裂、不整合和高渗透砂体组成良好输导体系，保存条件较差等特点。