南堡凹陷火山岩喷发模式及火山碎屑岩分布  

Volcanic rocks eruption patterns and distribution of pyroclastic rocks in Nanpu Sag

作　　者：付江 徐颖新 张广 王则 魏亚琼 陈海霞 FU Jiang;XU Yingxin;ZHANG Guang;WANG Ze;WEI Yaqiong;CHEN Haixia(Exploration and Development Research Institute,Jidong Oilfield Company,PeroChina,Hebei Tangshan 063004,China;BGP Inc.,CNPC,Hebei Zhuozhou 072751,China)

机构地区：[1]冀东油田公司勘探开发研究院,河北唐山063004 [2]中国石油东方地球物理公司,河北涿州072751

出　　处：《非常规油气》2024年第3期19-26,共8页Unconventional Oil & Gas

基　　金：冀东油田公司重大项目“南堡凹陷重点领域勘探潜力评价与目标实施”(KT2022A03)。

摘　　要：渤海湾盆地南堡凹陷中深层火山岩纵向多期次发育,厚度大,分布广泛,是油气富集有利区带,但火山岩储层薄,横向变化快,地震资料无法直接识别及刻画,影响着有利目标落实。为了有效刻画火山岩优势储层甜点发育区,针对火山碎屑岩有利储层预测问题,开展了火山岩区域分布规律研究、火山喷发模式建立、火山机构精细解剖、正演模型分析、融合属性及地质统计学反演工作。研究结果表明:1)火山喷发具有多期次性,单一期次火山岩喷发形成多个独立火山岩体;2)基性喷发岩之上发育火山碎屑岩,是火山岩岩性组合有利储层发育段;3)火山碎屑岩储层越发育,上覆地层地震波振幅变弱特征越明显;4)火山碎屑岩测井曲线表现为中声波时差和中伽玛特点。以上成果认识,详细描述了不同期次下火山岩顶面构造形态及火山碎屑岩有利储层分布,对南堡凹陷中深层火山岩进一步勘探具有一定指导意义。The middle-deep volcanic rocks in Nanpu Sag are developed vertically in multiple phases,with large thickness and wide distribution,which is a favorable zone for hydrocarbon enrichment.However,it is difficult to identify and characterize the reservoirs directly with seismic data due to the thin volcanic rocks and rapid lateral changes,which affects the determination of favorable targets.In order to effectively portray the dessert development area of the dominant reservoirs in volcanic rocks,research on the regional distribution modes of volcanic rocks,the establishment of eruption model,the fine dissection of volcanic structures,the analysis of forward modeling,the fusion of attributes and geostatistical inversion were carried out in response to the problems in the prediction of favorable reservoirs in pyroclasticrocks.The research results show that:1)The volcanic eruption has multiple phases,and a single phase of volcanic eruption forms multiple independent volcanic bodies;2)The well-developed pyroclastic rocks above the basal eruptive rocks are favorable reservoir development sections with lithologic association;3)The more the pyroclastic reservoirs are developed,the more obvious the characteristics of the seismic amplitude weakening of the overburden strata are;4)The pyroclasticlogging curves are characterized by a medium acoustic wave time difference and a medium gamma characteristic.Understanding the above achievements has effectively promoted and implemented the structural morphology of the volcanic top surface and favorable reservoir distribution of pyroclastic rocks.It has a certain guiding significance for the breakthrough in exploring middle-deep volcanic rocks in Nanpu Sag.

关 键 词：火山喷发模式 火山碎屑岩 正演模型 地质统计学反演 

分 类 号：TE122[石油与天然气工程—油气勘探]