海上古近系前积体储层预测技术——以渤海A油田为例  

Prediction Technology of Offshore Paleogene Progradation Reservoir:Taking Bohai A Oilfield as an Example

作　　者：张岚 唐何兵 郭诚 张立安 穆朋飞 ZHANG Lan;TANG Hebing;GUO Cheng;ZHANG Li′an;MU Pengfei(Tianjin Branch of CNOOC(China)Co.Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《重庆科技学院学报（自然科学版）》2023年第1期16-21,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：“十三五”国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058-001)。

摘　　要：渤海湾A油田沉积相属于河控型辫状河三角洲沉积,发育前积体储层,其中单期前积体油藏是目前油田挖潜的重点方向。首先,利用基于最小二乘法的近道振幅拟合技术压制多次波,以解决近道剩余多次波问题;利用基于广义S变换的拓频技术同时拓展地震的低频、高频信号,以获得真正的宽频地震信号。然后,对单期前积体进行精细解释,获得精细纵向沉积格架及其平面展布形态。最后,通过分频非线性反演,以单期前积体地层格架为约束,得到高分辨率反演密度数据体,从而实现对单期前积体平面展布及其厚度的准确预测。OilfieldA in Bohai Bay belongs to river controlled braided river delta deposit,and the reservoir is progradation reservoir,among which single progradation is the key direction for tapping the potential of the oilfield.Firstly,the near trace amplitude fitting technique based on the least square method is used to suppress multiples to solve the problem of residual multiples in the near trace.And the frequency extension technology based on generalized S transform is used to expand the low frequency signal and high frequency signal of earthquake at the same time,so as to obtain the true broadband seismic signal.Then,the fine interpretation of single stage progradation is carried out,and the fine vertical sedimentary framework and its plane distribution form are obtained.Finally,the high-resolution inversion density data volume is obtained by frequency division nonlinear inversion and constrained by the single stage progradation stratigraphic framework,so as to accurately predict and describe the plane distribution and thickness of single stage progradation.

关 键 词：前积体 多次波 广义S变换 沉积格架 分频反演 

分 类 号：P618[天文地球—矿床学]