河北地质大学学报2025，Vol.48Issue(2)：50-58,9.DOI:10.13937/j.cnki.hbdzdxxb.2025.02.006
鄂尔多斯盆地志丹地区长8致密油储层"甜点"识别与优选
The Identification and Optimization of the"Sweet Spot"in the Chang 8 Tight Oil Reservoir Located in the Zhidan Area of the Ordos Basin—Taking YT9 Well Area in Yongning Oilfield as an Example
摘要
Abstract
The Chang 8 reservoir in Zhidan area of Ordos Basin is a typical tight sandstone reservoir with fine grained arkose and ultra-low permeability.In recent years,Chang 8 tight oil in YT9 well area of Yongning Oilfield has found a certain industrial oil flow.However,the progress of exploration and development is slow,and it is necessary to optimize the reservoir sweet spot and identification in this area.Based on the data of core observation,test analysis,logging,well logging and production testing,the relation between lithology,physical property,electrical property and oil content of Chang 8 tight oil reservoir is analyzed by means of overlapping intersection method.The results show that the"sweet spot"of tight oil reservoir in YT9 well area is located in YT7-YT9-Y207 well area and Chang 82 reservoir in YT6 well area.The minimum requirements for its four properties are as follows:comprehensive logging should be maintained above the oil trace level,porosity should exceed 8.0%,permeability should exceed 0.2 mD,electrical measurement parameters should have a lower limit of 223 μs/m and resistivity of 25 Ω·m,and effective thickness should be no less than 6m.In this study,the identification criteria of effective reservoir of Chang 8 tight oil reservoir in YT9 well area of Yongning Oilfield are clarified,and the reservoir"sweet spot"is selected according to the parameters of reservoir oil content,comprehensive logging display,and oil thickness,which avoids certain risks for the development of regional Chang 8 tight oil horizontal Wells.关键词
鄂尔多斯盆地/志丹地区/致密油/储层优选/"甜点"识别Key words
Ordos Basin/Zhidan District/tight oil/reservoir optimization/"sweet spot"recognition分类
石油、天然气工程引用本文复制引用
薛刚,张伟杰,郭梦炎,姜鹏飞..鄂尔多斯盆地志丹地区长8致密油储层"甜点"识别与优选[J].河北地质大学学报,2025,48(2):50-58,9.基金项目
延长石油科研项目(ycsy2022qt-B-1-2-12-1) （ycsy2022qt-B-1-2-12-1）
