四川盆地东北部侏罗系凉高山组页岩油甜点与富集区评价
Evaluation of Shale Oil Sweet Spot and Rich Area in Jurassic Lianggaoshan Formation,Northeast Sichuan Basin
白雪峰 1王民 2王鑫 2李军辉 3卢双舫 4杨鑫翊 2李天一2
作者信息
- 1. 中国石油大学深层油气全国重点实验室,山东青岛 266580;多资源协同陆相页岩油绿色开采全国重点实验室,黑龙江大庆 163002;中国石油大庆油田有限责任公司,黑龙江大庆 163002
- 2. 中国石油大学深层油气全国重点实验室,山东青岛 266580
- 3. 多资源协同陆相页岩油绿色开采全国重点实验室,黑龙江大庆 163002;中国石油大庆油田有限责任公司,黑龙江大庆 163002
- 4. 东北石油大学三亚海洋油气研究院,海南三亚 572025
- 折叠
摘要
2020年四川盆地东北部平安1井在侏罗系凉高山组页岩层系试油112.8 m3/d,页岩油勘探获得突破.然而,其他相继部署的多口井日产油量差异较大,勘探开发效果并不理想,制约了页岩油富集区的优选.对此,本文分别基于改进后的Δlg R法和地层游离油量恢复模型获取含油性甜点参数(游离油量)、利用多元线性回归分析得到物性甜点参数(孔隙度)、借助Bowers法预测弹性能甜点参数(地层压力系数)、综合随机森林算法预测的脆性指数和数学模型获取的杨氏模量得到可压裂性甜点(可压裂性指数),通过采取一种改进后的层次分析计算方法获取了甜点综合评价指数并将其应用于重点页岩油勘探井,认为PY1井、PA1井的潜在有利层段分布于凉上1的底部、凉上2的底部和凉上3的中部,YQ1井分布于凉上1的中底部、凉上3的底部和顶部.平面优选目标区主要集中在PY1、PA1井的北部和YQ1井附近.
Abstract
In 2020,the Ping'an 1 well in the northeastern part of Sichuan Basin tested 112.8 m3/d in the Jurassic Lianggaoshan Formation shale,making a breakthrough in shale oil exploration.However,the daily oil production of other Wells deployed in succession is very different,and the exploration and development effect are not ideal,which restricts the selection of shale oil rich areas.In response,in this paper,the oil sweet spot parameter(free oil amount)is obtained based on the improved Δlog R method and the formation free oil recovery model,the physical property sweet spot parameter(porosity)is obtained by multiple linear regression analysis,the elastic energy sweet spot parameter(formation pressure coefficient)is predicted by Bowers method,the brittleness index predicted by comprehensive random forest algorithm and the Young's modulus obtained by mathematical model.By adopting an improved analytic hierarchy method,the comprehensive evaluation index of the sweet spot is obtained and applied to key shale oil exploration wells.It is considered that the potential favorable intervals of PY1 and PA1 wells are distributed in the bottom of Liangshang1,the bottom of Liangshang2 and the middle of Liangshang3,and the YQ1 well is distributed in the middle bottom of Liangshang1,the bottom and the top of Liangshang3.The target areas of plane optimization are mainly concentrated in the north of PY1 and PA1 wells and near YQ1 wells.
关键词
页岩层系/甜点评价/页岩油富集区/凉高山组/川东北地区/石油地质Key words
shale strata/sweet spot evaluation/shale oil rich area/Lianggaoshan Formation/Northeast Sichuan/petroleum geology引用本文复制引用
出版年
2024
NETL
NSTL
万方数据