四扣洼陷沙四段灰岩地震识别与预测  

Seismic detection and prediction of the limestone in the Es_4 of Sikou low-lying area

作　　者：朱定蓉[1] 苏朝光[1] 田建华[1] 

机构地区：[1]胜利油田分公司物探研究院

出　　处：《油气地球物理》2009年第2期34-38,共5页Petroleum Geophysics

摘　　要：四扣洼陷沙四段灰岩普遍发育,其分为灰礁、灰滩和灰泥3个亚相。通过对该地区沉积相的分析圈定了3个亚相有利分布范围,并运用正演模型对其进行了证实,结果表明,灰礁发育储层后振幅下降幅度远大于灰滩含储层后的振幅下降幅度,而泥灰岩振幅降幅最小。通过对振幅与频率的分析得知,振幅高值中的中值区储层发育,频率低值区储层发育,与义东—邵4断阶、邵家南坡和罗家鼻状构造灰滩发育区实钻结果吻合较好,该技术的应用有效提高了预测精度,为进一步的勘探和开发提供了可靠的技术支持。the limestone is commonly developed in Es40fSikou low-lying area, it is divided into carbonate eay, lime beach and chalk clay subfacies. The favorable distribution of the subfacies were defined by the analysis on the sedimentary facies of the area, and confirmed by forward models. The results show that the decrease of the amplitude for reservoir-developed carbonate eay is much larger than that for the reservoir-developed lime beach, and the least for the reservoir-developed lime mudrock. After the analysis on the amplitude and frequency was performed, it is known that the reservoirs were developed in the medium value area of the high amplitude values and in the low frequency area of the frequency value. It coincides better with the results drilled in the lime beach developed in Yidong-Shao 4 ladder fault, south slope of Shaojia and the Luojia nose. The technologies have im- proved the prediction precision, and prodived support to the further exploration and development in the area.

关 键 词：沉积特征 模式识别 正演模型 成藏分析 四扣洼陷 

分 类 号：P618.130.8[天文地球—矿床学] TM715[天文地球—地质学]