中南大学学报（自然科学版）2011，Vol.42Issue(8)：2507-2513,7.
山东车西洼陷异常高压对特低渗储层的影响
Influences of abnormal overpressure on super-low permeability reservoirs in Chexi depression in Shangdong
摘要
Abstract
The reservoir characteristics of upper Es4 member in Chexi depression in Shangdong are disadvantageous to oil & gas exploration and development, as lithologies are argillaceous fine-grained sandstones, porosities are 10% to 20% and permeabilities are less than 10X1CP-3 um2. In addition, the northern study area is delta front or semi-deep lake fades, where the coefficients of abnormal overpressure are between 1.2 and l.S. The researches results show that: the main mechanisms of generating abnormal overpressure in Chexi depression is formation uneven compaction, and the secondary is mineral diagenesis. The abnormal overpressure can effectively inhibit the formation temperature increase and diagenesis deepen. In the abnormal overpressure section, the secondary porosity is relatively well preserved for the oil and gas exploration and development. By comparative analysis of single well production capacity of normal pressure zone in southern and overpressure zone in northern, for argillaceous sandstone-based super-low permeability reservoirs, it is not a linear relationship between oil and gas production capacity and formation pressure coefficient, as a higher capacity corresponds to the pressure coefficient between 1.2 and 1.3. The reason for this phenomenon is related to four factors, I.e. Single sand body thickness (sand-mud ratio), physical parameters, oil saturation and pressure sensitivity.关键词
异常高压/成因机制/特低渗储层/储层物性Key words
abnormal overpressure/ development mechanism/ super-low permeability reservoirs/ reservoir properties分类
能源科技引用本文复制引用
马晓鸣,赵振宇,刘吴伟..山东车西洼陷异常高压对特低渗储层的影响[J].中南大学学报（自然科学版）,2011,42(8):2507-2513,7.基金项目
中国石油科技创新基金资助项目(2010D-5006-0104) （2010D-5006-0104）
