地质科技通报2025，Vol.44Issue(4)：354-367,14.DOI:10.19509/j.cnki.dzkq.tb20250019
海陆过渡相页岩层系总有机碳含量地震定量预测:以鄂尔多斯盆地大宁-吉县区块为例
TOC content seismic quantitative prediction of marine-continental transitional shale stratum:Taking the Daning-Jixian Block in the Ordos Basin as an example
摘要
Abstract
[Objective]Marine-continental transitional shale gas is a vital alternative resource for unconventional oil and gas exploration.Accurately characterizing the spatial distribution of total organic carbon content(TOC)is vital for predicting shale gas"sweet spots".[Methods]Due to the absence of an effective relationship between TOC content and rock elastic parameters in marine-continental transitional shale,conventional TOC content prediction methods based on elastic parameters,commonly used in marine shale gas evaluations,are difficult to apply.To overcome this limitation,we propose a waveform indication simulation seismic prediction method driven by facies control,which is performed after TOC content evaluation through a logging parameter fitting technique.This approach enables the spatial prediction of TOC content within transitional shale strata.[Results]The marine-continental transitional shale exhibits features such as thin monolayer thickness,high organic matter content,and irregular longitudinal distribution.High-frequency waveform simulation based on reservoir characteristic parameters effectively predicts TOC content in the transitional shale.The inversion results demonstrate relatively high vertical and horizontal resolutions and show a strong correlation with the TOC content curves obtained from logging parameter modeling.The coincidence rate reaches 84.4%,effectively reflecting the spatial variation of TOC content within the shale reservoir.[Conclusion]This method effectively addresses the challenge that the key evaluation parameter(TOC content)for identifying shale gas"sweet spots"in transitional facies cannot be quantitatively predicted solely from rock elastic parameters.It provides technical support for the exploration and development of transitional shale gas.关键词
鄂尔多斯盆地/海陆过渡相/页岩气/总有机碳含量/波形指示模拟/地震定量预测Key words
Ordos Basin/marine-continental transitional facies/shale gas/total organic carbon(TOC)content/waveform indication simulation/seismic quantitative prediction分类
天文与地球科学引用本文复制引用
吴勇,王旭旭,周路,李树新,李永洲,吴丰..海陆过渡相页岩层系总有机碳含量地震定量预测:以鄂尔多斯盆地大宁-吉县区块为例[J].地质科技通报,2025,44(4):354-367,14.基金项目
中国石油-西南石油大学创新联合体科技合作项目(2020CX030103) （2020CX030103）
