珠江口盆地油源断裂特征及输导能力评价  

Characteristics and transport ability evaluation of oil source faults in Pearl River Mouth Basin

作　　者：段亮 吴碧波 陈亚兵 刘政 冯琦 DUAN Liang;WU Bibo;CHEN Yabing;LIU Zheng;FENG Qi(CNOOC China Limited,Hainan Branch,Haikou,Hainan 570312,China)

机构地区：[1]中海石油(中国)有限公司海南分公司,海南海口570312

出　　处：《世界石油工业》2024年第2期33-41,共9页World Petroleum Industry

基　　金：中海石油(中国)有限公司重大三外“南海大中型天然气田形成条件、勘探潜力与突破方向”(KJZH-2021-0003)。

摘　　要：研究区位于南海西部珠江口盆地珠三坳陷文昌A凹陷。为定量评价珠江口盆地珠三坳陷文昌A凹陷区带内各油源断裂的输导能力,基于前人研究成果,结合该区琼海凸起东倾没端油气勘探实践,总结控制该区油源断裂输导能力的3大要素:油源面积、伸展面积和断面产状,建立了一套油源断裂输导能力综合评价方法。通过该方法,定量计算文昌A凹陷24条油源断裂的输导能力。评价结果认为,文昌8区输导能力整体较强,大型油源断裂附近仍有较大潜力;文昌9区和11区整体输导能力偏弱,后期拓展建议在本地深层展开;文昌10区油源断裂输导能力差异最大,与主油源断裂相邻区域是潜力拓展的重要方向。该认识支撑了文昌9区中型油田的高效评价,促进了神狐隆起中型油气田的发现,明确了文昌8区中深层拓展的方向,为文昌A凹陷的领域突破奠定了重要基础。该方法不仅对准确认识区带各油源断裂输导能力具有重要作用,更可为区带评价和决策部署提供重要依据。The study area is located in Wenchang A sag of ZhuⅢdepression in Pearl River Mouth Basin,western South China Sea.In order to quantitatively evaluate the conductivity of each oil source fracture in Wenchang A sag of ZhuⅢdepression in Pearl River Mouth Basin,based on previous research results and combined with the exploration practice of Qionghai uplift in this area,three major factors controlling the conductivity of oil source fractures in this area were summarized:Oil source area,Extension area and Fault section attitude.A comprehensive evaluation method for the conductivity of oil source fractures was established.Through this method,the conductivity of 24 oil source fractures in Wenchang A sag was quantitatively calculated.The evaluation results show that the overall conductivity of Wenchang 8 area is strong,and there is still great potential near large-scale oil source fractures;the overall conductivity of Wenchang 9 and 11 areas is weak,and it is suggested to expand in the local deep layer in the later stage;the conductivity of oil source fractures in Wenchang 10 area varies the most,and the adjacent areas to the main oil source fractures are important directions for potential expansion.This understanding supports the efficient evaluation of medium-sized oil fields in Wenchang 9 area,promotes the discovery of medium-sized oil and gas fields in Shenhu uplift,clarifies the direction of mid-deep development in Wenchang 8 area,and lays an important foundation for breakthroughs in Wenchang A sag.This method not only plays an important role in accurately understanding the conductivity of each oil source fracture in the area,but also provides an important basis for area evaluation and decision-making deployment.

关 键 词：珠江口盆地 珠三坳陷 文昌A凹陷 油源断裂 输导能力 定量评价 

分 类 号：TE122.1[石油与天然气工程—油气勘探]