摘要
神府区块位于鄂尔多斯盆地东北缘,上古生界的山西组、太原组及本溪组属于典型的源内成藏层系。砂岩储层厚度仅5~10m,受煤层屏蔽作用影响,近煤砂岩储层地震响应特征微弱,难以进行有效识别。为了解决地震分辨率不足的问题,采用TVF拓频技术进行地震子波整形处理,使地震主频从25Hz提高至50Hz,地震纵向分辨率从16m提高到8m。在此基础上,进行测井岩石物理分析,优选出纵横波速度比等敏感参数,基于地震波形指示反演预测出含气砂岩储层,实现了煤系致密砂岩储层的精细刻画。该技术的应用有效指导了神府区块水平井部署,取得了良好效果。
The Shenfu Block is located on the northeast edge of the Ordos Basin,and the Shanxi Formation,Taiyuan Formation,and Benxi Formation of the Upper Paleozoic belong to typical reservoir forming strata within the source.The thickness of sandstone reservoirs is only 5~10m,and due to the shielding effect of coal seams,the seismic response characteristics of near coal sandstone reservoirs are weak,making it difficult to effectively identify.In order to solve the problem of insufficient seismic resolution,TVF frequency extension technology is used for seismic wavelet shaping processing,which increases the seismic main frequency from 25Hz to 50Hz and the vertical seismic resolution from 16m to 8m.On this basis,well logging rock physics analysis was carried out to select sensitive parameters such as longitudinal and transverse wave velocity ratios.Based on seismic waveform indications,gas bearing sandstone reservoirs were predicted through inversion,achieving precise characterization of coal bearing tight sandstone reservoirs.The application of this technology has effectively guided the deployment of horizontal wells in the Shenfu block and achieved good results.
作者
林利明
季洪泉
杜佳
王振国
师素珍
赵康
徐翠云
LIN Liming;JI Hongquan;DU Jia;WANG Zhenguo;SHI Suzhen;ZHAO Kang;XU Cuiyun(China United Coalbed Methane Company,Beijing 10016;State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources,China University of Mining and Technology-Beijing,Beijing 100083;School of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing 100083;Research Institute of Petroleum Exploration and Development of Huabei Oilfield Company,PetroChina,Renqiu,Hebei 062550)
出处
《中国煤炭地质》
2025年第1期69-74,共6页
Coal Geology of China
基金
国家自然基金面上项目“煤储层全频带频散与衰减机理研究及流体因子构建”(42474186)
中海石油(中国)有限公司重大科技专项(CNOOC-KJ 135 ZDXM 40)。
关键词
煤系致密砂岩
高分辨率处理
波形指示反演
水平井部署
coal bearing tight sandstone
high resolution processing
waveform indication inversion
horizontal well deployment
