地震资料在徐家围子断陷沙河子组潜在烃源岩预测中的应用  

Application of seismic data for forecasting hydrocarbon source rocks in Shahezi Formation of Xujiaweizi fault depression

作　　者：黄薇[1] 王志国[1] 董景海[1] 周玥[1] 

机构地区：[1]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：《世界地质》2013年第3期571-578,共8页World Geology

基　　金：国家重点基础研究"973"项目"火山岩油气藏分布规律与资源预测"(2009CB219308)

摘　　要：徐家围子勘探实践表明,沙河子组烃源岩的分布控制着烃类气藏的分布。通过比较各种勘探方法及在研究区的具体适用情况,以及在徐家围子断陷勘探程度和各种资料综合分析的基础上,确定以地震相法为主要预测方法。根据钻遇沙河子组地层的单井沉积相并结合井点地震反射特征,总结出4类沙河子组潜在烃源岩的地震反射特征,并在全断陷对沙河子组的烃源岩品质进行整体评价。结合沙河子组地层厚度、有机碳指标、Ro值、泥地比值和地震相特征等烃源岩品质评价的依据,将沙河子组烃源岩有利区划分为I类区、II1类区和II2类区以及III类区。The exploration in Xujiaweizi fault depression indicated that the distribution of source rocks in Sha- hezi Formation controlled the distribution of the hydrocarbon gas pools. Through comparing various exploration methods and the specific application in the studied area, and on the basis of the exploration in Xujiaweizi fault de- pression and comprehensive analysis of various materials, the authors decided to take seismic facies as the main prediction method. According to the encountered sedimentary facies of single-well drilling in Shahezi Formation and combined seismic reflection characteristics of well-point, the authors summarized four characteristics of seismic re- flection of hydrocarbon source rocks in Shahezi Formation, and conducted an overall evaluation of the hydrocarbon source rock quality at Shahezi Formation. With formation thickness, organic carbon targets, Ro, mud ratio and seismic facies characteristics of hydrocarbon source rock based on the quality of the evaluation, it can be divided in- to Ⅰ, Ⅱ1, Ⅱ2 and III for the hydrocarbon source rock favorable regions of Shahezi Formation.

关 键 词：徐家围子断陷 沙河子组 烃源岩 地震相 

分 类 号：P631.4[天文地球—地质矿产勘探]