鄂尔多斯盆地低渗透岩心水测渗透率和气测渗透率关系研究

发布时间：2019-03-20 09:03

【摘要】：为研究鄂尔多斯盆地延长组低渗透储层的渗流特征并探讨其分类标准,对岩心气测渗透率(Kg)和水测渗透率(Kw)进行了测定分析。研究结果表明,Kg与Kw线性相关性良好,随Kg增大Kw也在增大,但不同Kg区间Kw增大幅度差异明显,总体表现为Kg0.5×10~(-3)μm~2、0.5×10~(-3)μm~2Kg0.8×10~(-3)μm~2、Kg0.8×10~(-3)μm~2三段式,Kw与Kg拟合直线段的斜率依次为0.0961、1.2993、0.2103,Kg/Kw平均值依次为19.27、3.97、3.22,(Kg-Kw)/Kg的变化范围依次为95.71%~92.12%、81.42%~66.08%、71.13%~65.54%。鉴于Kw随Kg的变化规律,建议取气测渗透率0.5×10~(-3)μm~2和0.8×10~(-3)μm~2分别作为致密储层、超低渗储层的上限,进一步精细划分低渗透储层。
[Abstract]:In order to study the percolation characteristics and classification criteria of low permeability reservoirs in Yanchang formation of Ordos Basin, the core gas permeability (Kg) and water permeability (Kw) were measured and analyzed. The results showed that there was a good linear correlation between Kg and Kwn, and Kw also increased with the increase of Kg, but there was a significant difference in Kw between different Kg intervals, which were Kg0.5 脳 10 ~ (- 3) 渭 m ~ (- 2) and 0.5 脳 10 ~ (- 3) 渭 m~2Kg0.8 脳 10 ~ (- 3) 渭 m ~ (- 2), respectively. Kg0.8 脳 10 ~ (- 3) 渭 m ~ (- 3) 渭 m ~ (- 2), the slope of fitting straight line between Kw and Kg is 0.0961, 1.2993, 0.2103, the average value of kg ~ (Kw) is 19.27, 3.97, 3.22, and the range of (Kg-Kw) / Kg is 95.71% ~ 92.12%, the slope of fitting straight line is 0.0961%, 1.2993%, 0.2103%, respectively. 81.42% / 66.08%, 71.13% / 65.54%. In view of the variation of Kw with Kg, it is suggested that the permeability of 0.5 脳 10 ~ (- 3) 渭 m ~ (- 2) and 0.8 脳 10 ~ (- 3) 渭 m ~ (- 2) should be used as tight reservoirs and the upper limit of ultra-low permeability reservoirs, respectively, and further fine division of low permeability reservoirs should be made.
【作者单位】：中国石油大学(北京)石油工程学院;中国石油拉美(秘鲁)公司;
【基金】：国家科技重大专项“特低渗油层有效开发技术”(编号:2011ZX05013-006)
【分类号】：TE312

【参考文献】