摘要
阿姆河盆地侏罗系卡洛夫—牛津阶碳酸盐岩缓坡礁、滩体储层内部结构复杂,井间储层厚度变化大、井间连通差、相邻井产能差异大、储采矛盾突出等影响气藏高效、稳定开发。为此,通过正演模拟识别礁、滩体外形,利用相位变换处理刻画礁滩体内幕、研究储层沉积微相,建立了碳酸盐岩礁、滩复合体储层构型模式,形成了多级相控地质统计学反演技术。获得以下认识:①模型二(生物礁、滩上覆厚石膏层夹薄层盐岩,生物礁、滩厚度较小)地震响应的界面间能量相对关系与过井资料吻合,礁、滩体呈“底平顶凸”、内部反射杂乱、振幅相对减弱、厚度较大的地震反射特征,可以利用模型二精细刻画无井区生物礁、滩体。②经相位变换处理的地震资料较原始地震资料更利于分析礁、滩体内幕结构,同相轴振幅的变化反映了礁、滩体内幕结构的岩性变化。③结合现代礁、滩体沉积,在正演模拟、相位变换、地震属性分析的基础上,建立了礁、滩体储层内部构型;受古地形及水动力能量的控制,优质的高能礁、滩体储层主要分布于礁、滩体边部。④基于储层构型分析的多级相控反演精细刻画了礁、滩体储层内幕结构,并与生产特征吻合,提高了储层预测精度,对开发方案的调整、储量动用具有重要指导意义。
The complex internal structure,wide reservoir thickness variation,poor connectivity,large difference in productivity between adjacent wells,and prominent contradiction between reserves and production of gentle slope reef and shoal of Jurassic Karlov-Oxford carbonate reservoirs in Amu Darya Basin affect the efficient and stable development of gas reservoirs.Therefore,through forward modeling to identify the shape of reef-shoal body,phase transformation process to characterize the internal structure of the reef-shoal body,and the reservoir sedimentary microfacies study,the configuration model of carbonate reef-shoal complex reservoir is established,and a multistage facies-controlled geostatistical inversion technique is developed.The conclusions are as follows:①The relative energy relationship between the interface of the seismic response of model 2(the reef and the shoal are covered with thick gypsum layer and thin salt rock,and the thickness of the reef and the shoal is small)is consistent with the well data.The reef and the shoal have the seismic reflection characteristics of“flat bottom and convex top”,chaotic internal reflection,relatively weak amplitude,and increased thickness.Model 2 can be used to accurately characte-rize the reef and shoal body in the no-well area.②The seismic data processed by phase transformation is more conducive to the analysis of the reef-shoal inner structure than the original seismic data,and the change of the in-phase axis amplitude reflects the lithologic change of the reef-shoal inner structure.③Combined with deposits of modern reef-shoal bodies,the internal configuration of the reef-shoal reservoir is established based on forward modeling,phase transformation,and seismic attribute analysis.It shows that high-energy reef-shoal reservoirs are mainly distributed at the edge of the reef-shoal body under the control of paleotopography and hydrodynamic energy.④The multistage facies-controlled inversion based on reservoir configuration analysis accurately describes the inner structure of reef-shoal reservoir and is consistent with production characteristics.It improves the accuracy of reservoir prediction and has important guiding significance for the adjustment of development plans and reserve utilization.
作者
柴辉
汪文
文光耀
龚幸林
董建雄
牛志文
CHAI Hui;WANG Wen;WEN Guangyao;GONG Xinlin;DONG Jianxiong;NIU Zhiwen(CNPC International(Turkmenistan),Beijing 100034,China;Oversea Business Department,Geophysical Research Institute,BGP Inc.,CNPC,Zhuozhou,Hebei 072751,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2023年第S01期70-76,共7页
Oil Geophysical Prospecting
基金
中国石油天然气股份有限公司专项课题“复杂碳酸盐岩气藏持续稳产关键技术研究”(2021DJ3301)资助。
关键词
储层构型
礁、滩体
正演模拟
相位变换
多级相控反演
reservoir configuration
reef-shoal reservoir
forward modeling
phase transformation
multistage faciescontrolled inversion
作者简介
柴辉,高级工程师,1974年生,1998年获中国石油大学(华东)石油工程专业学士学位,2008年获俄罗斯国立石油天然气大学石油天然气工程专业硕士学位,主持完成了多个大型油气田开发方案编制、产能建设,多次荣获省(部)级、局级科技进步奖,现为中石油阿姆河天然气公司副总经理兼安全总监,主要从事油气田开发、天然气生产、安全等领域的管理工作;汪文,河北省涿州市华阳东路东方地球物理公司科技园研究院海外业务部,072751。Email:wangwen08@cnpc.com.cn
