Seismic Prediction of Sandstone Diagenetic Facies: Applied to Cretaceous Qingshankou Formation in Qijia Depression, Songliao Basin
详细信息
- 责任者：Zeng Hongliu (Bureau of Economic Geology ; Jackson School of Geosciences ; The University of Texas at Austin ; Texas 78712 ; USA) ; Zhu Xiaomin
- 刊名：Petroleum Exploration and Development
- 出版年：2013
- 卷期：40(3)
- 关键词：砂岩储集层 ; sandstone reservoirs ; 地震属性 ; seismic attributes
- 页码：p.266-274
- 图表：illus., 1 table, 12 refs.
- 分类号：1600
- issnNo：ISSN1000-0747
- isbnNo：CN11-2360/TE
摘要
Seismic diagenetic facies is an important control factor on reservoir quality.This study investigated the possibility and feasibility of predicting sandstone diagenetic facies with conventional 3D seismic data by seismic sedimentology,calibrated by lab core analysis data in the Qijia area of the Songliao Basin.There are three core issues related to seismic characterization of diagenetic facies,including how to correlate stratigraphic and diagenetic units from seismic data,how to evaluate relationship between core-based diagenetic facies and seismic attributes,and how to find an effective way to map seismic diagenetic facies.Well-and seismic-based high-resolution sequence analysis and seismic stratal slicing provided reservoir-scale(20 m) seismic representations of diagenetic units.Core-based analyses of sandstone diagenetic processes and diagenetic sequence revealed that the diagenesis has the most important influence on reservoir quality.An investigation of reservoir parameters and acoustic rock properties further disclosed link between diagenetic facies and impedance,leading to the recognition of calcite cementation as a process that can be detected by seismic data.Seismic-based lithology cube(e.g.,90°-phased seismic volume) provided amplitude(impedance) signal for detection of diagenetic facies.The stratal slices made from the seismic-based lithology cube were used to interpret depositional facies and systems.Eventually,a seismic diagenetic facies map was generated by analyzing relationships between depositional facies,impedance,and diagenetic facies.The case study of the clay-cemented sandstone and calcite-cemented sandstone in the Qijia area showed that although being in its infant stage with many difficulties,the seismic detection of sandstone diagenetic facies with conventional seismic data is not only possible,but also feasible.
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