桑植-石门复向斜成藏条件探讨

Shangzhi-shimen Synclinorium Rservoir Forming Conditions

从烃源岩、储层、盖层(保存条件)及圈闭等因素入手,探讨了桑植-石门复向斜地区震旦-志留纪地层的油气成藏特征。认为研究区具有良好的生烃条件和较好的储集条件,在断层不发育地区油气保存条件良好。岩性圈闭形成在三叠系以前的古生代地层中,而构造圈闭则受燕山运动影响。结合生烃史与区域构造演化规律来看,研究区东北部是油气的有利聚集地区。

In consideration of the factors of hydrocarbon source rock, reservoir, caprock and (conserving conditions) and trap etc, the characteristics of Sinian-Silurian oil and gas reservoir forming in Shangzhi-Shimen synclinorium area are studied. It is considered that the studied area has good hydrocarbon generating conditions and good reservoir conditions and oil and gas conserving conditions in undeveloped fault block areas are good. The tithologic traps are formed in Palaeozoic era before Triassic period, and structural traps are influenced by Yanshan movement. In combination of hydrocarbon generating history with regional structure evolution rules, it is thought that the north-east part of studied area is a beneficial area of oil and gas accumulation.