The reconstruction of lithofacies and paleogeography, especially the definition of paleoshoreline of Chang 6 member in Gengwan-Shijiawan area is significant for the further exploitation in this area.

• 耿-史地区长6段不同沉积时期岩相古地理面貌，特别是古岸线的确定，对于指导该区长6油藏下一步的开发具有极其重要的意义。