Overpressure Retardation of Organic Acid Generation and Clastic Reservoirs Dissolution in Central Huanghua Depression

详细信息   

• 责任者：Meng Yuanlin （Daqing Petroleum Institute ; Qinhuangdao 066004 ; China） ; Li Bin
• 刊名：Petroleum Exploration and Development
• 出版年：2008
• 卷期：35(1)
• 关键词：超压 ; overpressure ; 有机酸 ; organic acids ; 黄骅坳陷 ; Huanghua Depression ; 渤海湾盆地 ; Bohai Gulf Basin
• 页码：p.40-43
• 图表：2 illus., 23 refs.
• 分类号：1003
• issnNo：ISSN1000-0747
• isbnNo：CN11-2360/TE

摘要

There exist overpressures in the Paleogene of the central Huanghua Depression, Bohai Bay Basin, and the hydrocarbons of deep zones are dominantly accumulated in secondary pores of the overpressured formations. The diagenetic physical simulating experiments were done at different temperatures and under 25 MPa and 55 MPa respectively to study the relationships between overpressure and the organic acid generation in mudstones and the dissolution of reservoirs. The residual total organic acid contents in the samples under 25 MPa are lower than those under 55 MPa at the same temperatures, whereas the generated total organic acids under the 25 MPa are higher than those under 55 MPa, suggesting that pressure retards the organic acid generating. The porosity data from different pressure settings also supports the results.