首页|珠江口盆地陆丰12-A油田"断-脊-盖"耦合远源成藏模式

珠江口盆地陆丰12-A油田"断-脊-盖"耦合远源成藏模式

扫码查看
原文链接
  • 万方数据
珠江口盆地陆丰凹陷历经40年勘探,发现了 10余个商业油藏,其中大多数油藏分布于生烃中心15 km范围内,而远源目标的成藏主控因素复杂,取得勘探发现的难度较大.陆丰12-A油田与其生烃洼陷陆丰15洼的水平距离长达28 km,是迄今为止陆丰地区已知的油气运移距离最远的、主力油层全充满的商业性油藏.通过构造、沉积、成藏综合分析,对陆丰12-A油田的成藏模式进行解剖,研究表明,在油气运移路径上"油源断裂-构造脊-致密盖层"耦合关系好,使油气得以长距离运聚成藏.其中,成藏期活动的油源断裂是油气垂向运移的关键,古隆起与构造脊是油气侧向汇聚的有利方向,稳定分布的致密盖层是油气远源成藏的保障.该油田的发现大大拓展了陆丰凹陷的勘探边界,对其长距离运聚成藏的研究在陆相盆地远源勘探实践中具有一定的借鉴意义.
Long-distance petroleum accumulation model of"oil-source faults-structural ridges-top seals"coupling of LF12-A oilfield in Pearl River Mouth basin
Nearly a dozen commercial reservoirs have been discovered during forty years of exploration in Lufeng sag,Pearl River Mouth basin,most of which lie just within 15 km from its hydrocarbon generation center,while the drilling of faraway prospects are mostly ended in failure due to the complicated control factors of long-distance petroleum accumulation.The lateral migration distance of LF12-A oilfield from its source kitchen LF15 subsag is as long as 28 km,which is not only the farthermost but also a fully charged(primary pay zone)commercial reservoir in Lufeng sag up to date.Comprehensive analysis of structure,sedimentation and petroleum accumulation as well as thoroughly study of petroleum migration and accumulation model of LF12-A oilfield show that the coupling of the three factors,which are"oil-source faults-structural ridges-top seals"along migration pathway ensures the long-distance petroleum migration and accumulation.Among them,active oil-source faults during the reservoir accumulation period is the key to vertical migration,ancient uplifts and structural ridges are the favourable petroleum migration and accumulation directions,and stably distributed top seals ensure the long-distance petroleum accumulation.The discovery of LF12-A oilfield highly expands the exploration boundary of Lufeng sag,and the study of its long-distance petroleum migration and accumulation has certain reference significance in the practice of exploring similar continental basins.

Pearl River Mouth basinLufeng sagLF12-A oilfield"oil-source faults-structural ridges-top seals"couplingpetroleum migrationlong-distance petroleum accumulation

孙阳子、张向涛、雷永昌、邱欣卫、肖张波、阙晓铭、贾连凯

展开 >

中海石油(中国)有限公司深圳分公司 广东深圳 518054

中海石油深海开发有限公司 广东深圳 518054

珠江口盆地 陆丰凹陷 陆丰12-A油田 "断-脊-盖"耦合 油气运移 远源成藏

中海石油(中国)有限公司"十三五"科技重点项目

CNOOC-KJ 135ZDXM37SZ 01SHENHAI

2024

10.11935/j.issn.1673-1506.2024.01.006

中国海上油气
中海石油研究中心

中国海上油气

CSTPCD北大核心
影响因子：1.266
ISSN：1673-1506
年,卷(期)：2024.36(1)
  • 25