新疆石油地质 ›› 2021, Vol. 42 ›› Issue (4): 410-417.doi: 10.7657/XJPG20210403
丁强1a(), 成健1a, 杨博1a, 靳紫馨1b, 刘菲2, 赵子文3, 于景维3(
)
收稿日期:
2021-03-05
修回日期:
2021-05-07
出版日期:
2021-08-01
发布日期:
2021-08-09
通讯作者:
于景维
E-mail:154890709@qq.com;yyjjww-1985@163.com
作者简介:
丁强(1984-),男,四川绵阳人,工程师,油气田开发,(Tel)15769221984(E-mail) 基金资助:
DING Qiang1a(), CHENG Jian1a, YANG Bo1a, JIN Zixin1b, LIU Fei2, ZHAO Ziwen3, YU Jingwei3(
)
Received:
2021-03-05
Revised:
2021-05-07
Online:
2021-08-01
Published:
2021-08-09
Contact:
YU Jingwei
E-mail:154890709@qq.com;yyjjww-1985@163.com
摘要:
鄂尔多斯盆地胡尖山油田胡154区块三叠系延长组长4+5段属于低孔低渗储集层,孔隙结构相关研究较少,缺乏详细定量化分析,导致胡154区块产量下降较快,水驱控制程度不高。为定量表征研究区目的层孔隙结构,利用岩心、薄片、铸体薄片、扫描电镜、高压压汞及相渗实验资料,对孔隙结构进行定量表征及分类,结合测井曲线,对不同类型孔隙结构储集层在平面上的分布进行研究。结果表明,研究区长4+5段孔隙类型以剩余粒间孔为主,喉道类型主要为片状和弯片状。孔隙结构划分为3类:Ⅰ类孔隙结构分形维数分布于2.57~2.61,排驱压力平均为1.62 MPa,日产油量2 t以上;Ⅱ类孔隙结构分形维数分布于2.61~2.66,排驱压力平均为2.61 MPa,日产油量1~2 t;Ⅲ类孔隙结构分形维数分布于2.66~2.71,排驱压力平均为3.52 MPa,日产油量小于1 t。具有Ⅱ类孔隙结构和Ⅲ类孔隙结构的储集层在平面上分布较广,长(4+5)2孔隙结构相对好于长(4+5)1。
中图分类号:
丁强, 成健, 杨博, 靳紫馨, 刘菲, 赵子文, 于景维. 鄂尔多斯盆地胡154区块长4+5段孔隙结构定量表征及分类[J]. 新疆石油地质, 2021, 42(4): 410-417.
DING Qiang, CHENG Jian, YANG Bo, JIN Zixin, LIU Fei, ZHAO Ziwen, YU Jingwei. Quantitative Characterization and Classification of Pore Structures in Chang 4+5 Member in Block Hu-154, Ordos Basin[J]. Xinjiang Petroleum Geology, 2021, 42(4): 410-417.
表1
研究区长4+5段孔隙结构分类"
类型 | 分形 维数 | 孔隙 组合 | 喉道 类型 | 渗透率/ mD | 孔隙度/ % | 分选 系数 | 变异 系数 | 中值半径/ μm | 排驱压力/ MPa | 岩性 | 原孔隙结构 分类 | 日产油量/ t |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Ⅰ类 | 2.57~ 2.61 | 剩余粒间孔 | 片状、 缩颈型 | 0.26~ 5.26 | 10.60~ 13.80 | 1.62~ 3.30 | 0.16~ 0.41 | 0.07~ 0.62 | 0.03~ 2.58 | 细砂岩、粉-细砂岩 | Ⅰ、Ⅱ类 | >2 |
Ⅱ类 | 2.61~ 2.66 | 剩余粒间孔、粒内溶孔 | 片状、 弯片状 | 0.13~ 11.37 | 9.10~ 13.50 | 1.25~ 2.89 | 0.18~ 0.22 | 0.08~ 0.36 | 1.26~ 4.06 | 粉-细砂岩、粉砂岩 | 主要为Ⅱ、Ⅲ类,少量Ⅰ类 | 1~2 |
Ⅲ类 | 2.66~ 2.71 | 粒内溶孔、粒间溶孔、剩余粒间孔 | 弯片、 及片状 | 0.12~ 9.13 | 8.90~ 10.90 | 0.10~ 2.63 | 0.13~ 0.21 | 0.05~ 0.12 | 2.16~ 6.98 | 粉砂岩、含泥粉砂岩 | Ⅱ、Ⅲ类 | <1 |
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