陆东凹陷交南断鼻九佛堂组重力流水下扇砂岩储集层研究
|
摘要
重力流沉积与矿产资源（特别是油气资源）的关系是重力流沉积研究的一项重要内容。根据岩心观察、薄片鉴定、测井相分析和地震资料解释的结果，对陆东凹陷交南断鼻九佛堂组重力流沉积的类型、平面展市等进行了研究。认为陆东凹陷下白垩统九佛堂组总体上为一套半深湖─深湖相泥页岩油源层，重力流沉积的水下扇砂岩夹于泥页岩中构成了好的储集层。重力流沉积的类型有碎屑流、高密度浊流和低密度浊流，平面分布为水下扇。研究区内主要发育中扇和外扇亚相，中扇可分为中扇内缘沟道和外缘叶状体两个微相。中扇内缘沟道由碎屑流和高密度浊流组成，中扇外缘叶状体由高密度浊流和低密度浊流组成。研究区内有63％的油层由叶状体砂岩组成，有32％的油层由沟道砂岩组成。叶状体砂岩孔隙度高、渗透率大，排驱压力低，是最好的储集层；沟道砂岩次之。水下扇砂岩储集物性不受泥质含量影响，但受碳酸盐胶结物影响明显。得出的结论对该区油气的进一步勘探开发有重要意义。
The relationship between gravity flow deposits and mineral resources (especially oil and gas) is an important topic of gravityflow deposit research. Based on core examination, thin section identification, logging analysis and seismic data interpretation,the type and areal distribution of Lower Cretaceous gravity flow deposits in the Jiaonan faulted nose of the Ludong sag arestudied. It is considered that the outer front lobes of the mid-fan formed a 1ot of good reservoirs, this conclusion has a greatsignificance to the further oil and gas exploration and development in this region.
The relationship between gravity flow deposits and mineral resources (especially oil and gas) is an important topic of gravityflow deposit research. Based on core examination, thin section identification, logging analysis and seismic data interpretation,the type and areal distribution of Lower Cretaceous gravity flow deposits in the Jiaonan faulted nose of the Ludong sag arestudied. It is considered that the outer front lobes of the mid-fan formed a 1ot of good reservoirs, this conclusion has a greatsignificance to the further oil and gas exploration and development in this region.
引文
1高振中段太忠:华南海相深水重力流沉积相模式;沉积学报1990.8(2) 9～21_
2 Walker, R. G.: Deep water sandstone fades and ancient submarine fans: Models for exploration for stratigraphic traps;AAPG,1978, 62(6) 932-966.
2 Walker, R. G.: Deep water sandstone fades and ancient submarine fans: Models for exploration for stratigraphic traps;AAPG,1978, 62(6) 932-966.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心