黄土塬区致密储集层模型地震正反演模拟  

Seismic forward and inverse simulation in a tight reservoir model of loess plateau region

作　　者：王大兴[1,2] 张盟勃[1,2] 杨文敬[2,3] 蔡克汉[1] 高利东[1] 朱军[1] WANG Daxing ZHANG Mengbo YANG Wenjing CAI Kehanl GAO Lidong ZHU Jun(Exploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi＇ an 710018, China National Engineering Laboratory for Exploration and Development of Low-Permeability Oil ＆ Gas Fields, Xi＇ an 710018, China Exploration Department of Petro China Changqing Oilfield Company, Xi＇ an 71 O018, China)

机构地区：[1]中国石油长庆油田公司勘探开发研究院,西安710018 [2]低渗透油气田勘探开发国家工程实验室,西安710018 [3]中国石油长庆油田公司勘探部,西安710018

出　　处：《石油勘探与开发》2017年第2期243-251,共9页Petroleum Exploration and Development

基　　金：国家自然科学基金"非常规油气勘探与开发地球物理理论与方法研究"项目(41390451);国家示范工程"鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程"(2016ZX05050)

摘　　要：为明确鄂尔多斯盆地黄土塬区地表地震波场传播规律和致密储集层地震响应特征,通过建立真实地表条件下储集层的地质-地球物理模型,开展了全弹性地震波动方程正演模拟和叠前地震弹性参数反演研究。模拟地震数据和实际地震数据同步处理分析表明:起伏疏松地表是导致地震静校正问题和干扰波发育的主要原因,近道约束的层析静校正方法可以解决黄土塬地震静校正问题并提高其精度,叠前反演横波波阻抗识别砂体效果明显,泊松比可以被用于识别含油储集层。地震正反演模拟研究为致密储集层地震预测提供了理论和实验依据,并在鄂尔多斯盆地黄土塬区致密油勘探开发中见到良好的应用效果。To find out the seismic wave field propagation principles in loess plateau near surface of the Ordos Basin and the seismic response characteristics of tight oil reservoirs, this study established a geological-geophysical model under the real conditions of ground surface of loess plateau, and launched full elastic seismic wave equation forward modeling and pre-stack elastic seismic inversion study. Comparison of modeling and real seismic data shows that, the loose and wavy loess plateau surface is the main reason for causing the problems of seismic static correction and interference wave. Tomographic static correction method with the constraint of traces near shot point can effectively solve the problem of seismic static correction in the loess plateau and enhance seismic interpretation accuracy, S-wave impedance obtained from pre-stack seismic inversion can identify sandstone effectively, and Poisson＇s ratio can identify oil-bearing reservoirs. The seismic forward and inverse simulation and rock physical analysis provide a solid theoretical and experimental basis for the seismic prediction of tight oil reservoir, and have worked well in the oil exploration and development in the loess plateau of the Ordos Basin.

关 键 词：黄土塬地表 致密储集层 波动方程正演模拟 近道约束层析静校正 叠前弹性参数反演 

分 类 号：TE122.2[石油与天然气工程—油气勘探]