石油实验地质2018，Vol.40Issue(1)：110-117,8.DOI:10.11781/sysydz201801110
四川盆地涪陵地区页岩储层压力预测及高压形成机制分析
Formation pressure prediction and high pressure formation mechanisms of shale reservoirs in Fuling area, Sichuan Basin
摘要
Abstract
Formation pressure is one of the important indicators to reflect shale gas preservation conditions, and is also an important factor affecting shale gas production. In the Fuling shale gas field, which has complex struc-ture characteristics and variable formation pressure distribution, it is particularly important to accurately predict the formation pressure in shale gas exploration and development. The Eaton method was a preferred method for the prediction of formation pressure in the Fuling shale gas field based on the systematic analysis of the existing prediction methods. Combined with the geologic characteristics of Fuling area, the established method for normal compaction trend ( NCT) lines was improved through vertical segmentation, plane partitioning and multi-well combination. It improved the accuracy of single well pressure prediction. The accuracy of 3D formation pressure prediction was improved by high-precision seismic layer velocity processing with generalized linear inversion. Based on the acoustic velocity-density intersection diagram and organic matter evolution characteristics and struc-tural features, the paper explored the high pressure formation mechanisms of shale intervals in the Fuling area. It was concluded that the abnormal pressure in the Silurian shale formations in the Fuling area was the result of the combined effect of three mechanisms:undercompaction, hydrocarbon generation and tectonic compression.关键词
页岩气/地层压力/正常压实趋势线/广义线性速度反演/异常高压/涪陵地区/四川盆地Key words
shale gas/formation pressure/normal compaction trend line/generalized linear velocity inversion/abnormal high pressure/Fuling area/Sichuan Basin分类
能源科技引用本文复制引用
陈亚琳,郁飞,罗兵,邹贤军..四川盆地涪陵地区页岩储层压力预测及高压形成机制分析[J].石油实验地质,2018,40(1):110-117,8.基金项目
国家科技重大专项(2016ZX05060)和中国石化科技项目(P17014-2)资助. （2016ZX05060）
