基于体控建模的地震反演在火山岩储层预测中的应用  

APPLICATION OF THE SEISMIC INVERSION BASED ON ROCK MASS CONTROLLED MODELING IN THE VOLCANIC RESERVOIR PREDICTION

作　　者：雒聪 田野[2] 陈树民[3] 印兴耀 裴明波[3] 

机构地区：[1]中国石油大学地球科学与技术学院,山东青岛266555 [2]大庆油田有限责任公司采油工程研究院,黑龙江大庆163712 [3]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2015年第5期135-140,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：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"(2009CB219307)和"多元多尺度地球物理信息映射关系及反演"(2013CB228604)资助

摘　　要：不同于沉积地层,火山岩具有多级次内幕结构,其地层结构、填充类型和叠置关系复杂多变,常规沉积层序地层概念指导下的模型难以反映火山岩地层复杂的地质特征及剧烈的横向变化。因此,基于内幕结构解剖和层序精细划分的火山岩格架模型对提高反演精度,从而真实反映火山岩储层分布具有重要意义。采取组内划段,段内识别火山岩地层,地层细化火山期次,以期次为时间格架剖分火山岩体的方案,将徐家围子断陷安达地区营城组三段进行了火山岩地层—喷发期次—火山喷发岩体的精细刻画。在多种火山喷发模式和火山岩体约束下,建造出符合火山岩地层特征的地质模型。在此高精度模型的约束下,结合测井敏感参数分析结果,开展多井约束的波阻抗反演和密度反演,实现火山岩储层的定量预测。与钻井揭示结果相对比,火山岩储层预测符合率达到83.33%,显示了基于体控建模的反演方法对火山岩储层预测的可靠性。Different from the sedimentary strata, the volcano rock has multiple-level internal structures. Its strata structures, filler types and stacked relationship are so complex and variable, thus the conventional stratigraphic sequence models under the sedimentary strata guidance cannot response the complex geological characteristics of the volcano strata and violent horizontal changes. Therefore the volcano rock framework model based on the inside structure analyses and stratigraphic framework fine division is critical to improve the precision of the volcanic reservoir inversion and more realistically reflect the distributions of the volcanic reservoirs. By means of the following programs： dividing intervals within the member, identifying the volcanic formations within the intervals, finely classify the periods and times for the formations and dissecting ＆ dividing the volcanic rock masses by the time framework of the periods and times stated above, the fine characterization of the volcanic rock formation-eruption periods and times-eruption rock masses is conducted for Yingcheng-Formation Member 3 in Anda area of Xujiaweizi Fault Depression. Under the constraints of the volcano erupting modes and volcanic rock masses, the geological model is built to accord with the characteristics of the volcanic strata. In the constraint of the high-precision model and combined with the analyzed results of the sensitivity parameters by the well logs, the impedance and density inversions are figured out under the constraint of multiple wells, and furthermore the quantitative prediction of the volcanic reservoirs are realized. Compared with the disclosed results of the well drilling, the prediction coincidence ratio of these reservoirs has reached 83.33%, thus the reliability is obviously and soundly shown for the inverting method based on the rock mass controlled modeling for the volcanic reservoir prediction.

关 键 词：营城组火山岩 火山喷发岩体 体控模型 波阻抗反演 储层预测 

分 类 号：P631[天文地球—地质矿产勘探]