陈树民,姜传金,张元高,裴明波
CHEN Shumin,JIANG Chuanjin,ZHANG Yuangao,PEI Mingbo

• 1:大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

以徐家围子断陷营城组火山岩为例,充分利用覆盖全断陷的高精度连片叠前时间偏移三维地震资料,以大量的勘探开发钻探成果为刻度,系统剖析了火山岩地层、火山岩储层、气藏发育特征及控制因素等。研究表明:营城组地层具有"水、火"共生的层序发育特征,在火山喷发区形成以火山岩为主的火山岩层序,火山喷出物波及范围外发育以沉积岩为主的沉积层序,沉积地层中记录了区域火山作用的旋回性;火山喷发受深大走滑断裂带控制,具有横向迁移振荡和纵向多旋回叠置的特征;火山喷发强度控制火山岩储层的发育,单期火山作用的局部性和后期火山对早期火山的改造加剧了火山岩储层的横向变化,导致了火山岩储集层的强非均质性;不同深度、不同岩性、岩相均可以形成有效储层,其中火山岩喷发间断界面和后期构造改造作用是形成有利储层的主要控制因素,与火山岩体复杂的空间组合关系及岩体内岩性、岩相的差异性配置,决定了火山岩具有形成局部"甜点"并大面积分布的致密气藏的特点,使得火山岩勘探理念形成了由"点"到"面"的突破。
Taking Yingcheng Formation volcanic rocks in Xujiaweizi Fault Depression as an example and making full use of the high-accuracy joint prestack time migration 3D seismic data and a large amount of the drilling achievements about the exploration and development,from the viewpoint of the whole depression,the volcanic formation and reservoirs and the developed characteristics and their controlling factors of the gas reservoir 3D distribution are systematically analyzed.The studies show that there are "water and fire" syngenetic sequence developed features in Yingcheng Formation and the volcanoes erupt in the shallow water lacustrine-facies environment in the fault period,the volcanic sequences are generated in the eruptive area,which take the volcanic rocks as the main lithology;the sedimentary sequences are developed outside the swept area of the eruptive bodies,which take the sedimentary rocks as the main form,the cyclicity of the regional volcanic actions is recorded in the sedimentary formations;controlled by the deep and huge strike-slip fault belts,the volcanic eruption possesses the characteristics of lateral migration concussion and longitudinal multi-cycle superimposition,showing the volcano eruption pattern of non-isochronous cyclic progressive type;the volcanic eruption intensity and action radius determine the variation of the lithology and the volcanic reservoir extension scale,the locality of the single-phase volcanic action and the reformation of the later volcanos to the early volcanos intensify the lateral variation of the volcanic reservoirs,and moreover lead to the strong heterogeneity.Whatever different depdi,lithology and lithofacies can generate effective reservoirs,however the interfaces of discontinuous volcanic eruption and later tectonic construction are the main controlling factors for the formation of the favorable reservoirs.The complex spatial combined relationships with the volcanic bodies and differential lithology-lithofacies-physical property matches determine the generation of the local "sweet point" and its wide distribution,thus the breakthrough from "point" to "plane" can be realized for the volcanic exploration thoughts.

关键词(KeyWords)： 火山岩地层;火山喷发模式;连片三维地震;有利储层;控制因素;喷发间断面
volcanic rock formation;volcano eruption pattern;joint 3D seismic;favorable reservoir;controlling factor;discontinuous volcano eruption interface

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划(973)项目“火山岩油气藏的形成机制与分布规律”(2009CB219300)

作者(Author): 陈树民,姜传金,张元高,裴明波
CHEN Shumin,JIANG Chuanjin,ZHANG Yuangao,PEI Mingbo

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