江汉盆地丫角低凸起油源剖析

ANALYSIS OF OIL SOURCE OF YAJIAO OILFIELD JIANGHAN BASIN

江继纲 严叔澜

Jiang Jigang Yan Shulan

江汉盆地丫角低凸起潜江组生油岩尚未成熟。丫角油田原油与清水口洼陷潜江组原油不同源,而可能来自潜江凹陷高场、浩西一带的潜3、4段。

Yajiao oilfield is located between Qianjiang Depression and Jiangling De-pression of Jianghan Basin in central China.The oil is produced in the Qian-jiang Formation of the Eogene.Its specific gravity is more than 0.91,visco-sity more than 0.1Pa.s,sulphur content greater than 1%,saturated hydrocarbon content less than 38%.According to biomarker and other geological-geochemicaldata,it is inferred that the oil is derived from the Qianjiang Formation of Qianjiang Depression instead of Jiangling Depression.

10.11743/ogg19860310