合浦盆地川江断块成藏条件与有利勘探方向  

The Hydrocarbon Accumulation Conditions and Favorable Exploration Direction of Chuanjiang Block of Hepu Basin

作　　者：龚晓峰[1,2] 杨希冰 朱继田 张景茹[1,2] 李晓唐[1,2] 

机构地区：[1]中国科学院边缘海地质重点实验室,广东广州510640 [2]中国科学院大学,北京石景山100049 [3]中海石油(中国)有限公司湛江分公司研究院,广东湛江524057

出　　处：《西南石油大学学报（自然科学版）》2014年第1期9-18,共10页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家自然科学基金(41176052);国家重点基础研究发展计划(2009CB219501)

摘　　要：合浦盆地乐2X井钻遇地层均以灰白色、杂色及紫红色粗碎屑岩为主,暗色泥岩厚度较薄,仅始新统酒席坑组上段较厚,但埋藏过浅,处于未成熟阶段。乐2X井所在的川江断块圈闭基本落实,但是该圈闭基本不具备烃源条件,又远离烃源的有效供给系统,导致该断块圈闭成为了"无源之水"、"无本之木"的空圈闭是钻探失利的主要原因。因此,深入分析研究低熟烃源岩分布及烃源供给系统,在有效烃源供给系统内,综合预测与圈定有利的低熟油气及生物气运聚富集区带,应是该盆地油气勘探攻关的关键所在。Strata found in Well Le2X in Hepu Basin are mainly off-white, variegated and purple-red, and dark mudstone is thinner than others, only Jiuxikeng group of the Pliocene is thicker, but its bury is not deep, and belongs to prematurity stage. The Chuanjiang fault block structural trap of Well Le2X is basically clear, but the traps is without basic hydrocarbon source conditions and is away from the hydrocarbon source supply system, resulting in the fault block traps becoming empty traps, which is the main reason for the failure drilling. Therefore, in-depth analysis of the low mature source rocks and hydrocarbon source supply system, comprehensive prediction and delineation of favorable migration and accumulation of enriched zone of low mature oil and gas and bio-gas within effective hydrocarbon source supply system, should be the key to oil and gas exploration research in Hepu Basin.

关 键 词：合浦盆地 乐2X井 烃源的有效供给系统 低熟油气 生物气 

分 类 号：TE122.2[石油与天然气工程—油气勘探]