纵波阻抗精细重构下的地震反演技术在东风港油田的应用  

Application of the seismic inverting technology based on the fine reconstruction of P-wave impedance in Dongfenggang Oilfield

作　　者：王月蕾[1] 王树华 毕俊凤 石泉清[1] 乔玉雷[1] WANG Yuelei;WANG Shuhua;BI Junfeng;SHI Quanqing;QIAO Yulei(Exploration and Development Research Institute of Sinopec Shengli Oilfield Co Ltd, Dongying 257015, China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《大庆石油地质与开发》2021年第1期137-145,共9页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石化股份公司课题“基于大数据技术的油藏精细表征方法研究”(P2020018)。

摘　　要：东风港油田沙四上亚段岩性复杂、测井数据采集时间跨度长,根据原始测井响应特征无法高效识别储层,地震反演工作难以展开。通过对东风港油田沙四上亚段建立测井精细处理及纵波阻抗精细重构的方法,构建了具有全区一致性、能够将不同物源的储层和非储层良好区分的纵波阻抗曲线,同时基于地质、地球物理特征分析优选反演方法。结果表明:研究区沙四上亚段砂体主要发育在1砂组和3砂组,低位域时期发育的3砂组为南部物源体系三角洲前端的重力流成因砂体,而高位域时期发育的1砂组为北部物源体系的扇三角洲前端改造后的滩坝相砂岩沉积。研究成果为东风港油田沙四上亚段储层分布预测提供了依据。The upper Es4 member in Dongfenggang Oilfield is characterized by complex lithology and long time span of logging data acquisition. The reservoir cannot be identified efficiently according to the original well logging response characteristics, and it is difficult to carry out the seismic inversion. Through the fine processing method of the well logging and fine reconstructing method of P-wave impedance for upper Es4 member in Dongfenggang Oilfield, the impedance curves with the consistency of the whole region and the ability to distinguish the reservoirs from the non-reservoirs of different provenances were constructed. Based on the analyses of the geological and geophysical characteristics, the inverting method was also optimized. The results show that the sandbodies of upper Es4 member in the study area are mainly developed in Sand Group 1 and 3.The Sand Group 3 developed in the low-domain period is the sandbody of gravity flow origin in the front of the delta of the south provenance system, while the Sand Group 1 developed in the high-domain period is the beach bar deposition of the reformed fan delta front from the north provenance system. This study achievements have provided the evidences for the reservoir distribution prediction of upper Es4 member in Dongfenggang Oilfield.

关 键 词：东风港油田 沙四上亚段 储层敏感参数分析 储层预测 纵波阻抗重构 地震反演 

分 类 号：P631[天文地球—地质矿产勘探]