石油实验地质2017，Vol.39Issue(6)：812-818,7.DOI:10.11781/sysydz201706812
鄂尔多斯盆地新安边油田长7致密油有效储层识别与甜点优选
Effective reservoir identification and"sweet spot"optimization of Chang 7 tight oil reservoir in Xin'anbian oil field, Ordos Basin
摘要
Abstract
We proposed criteria whereby tight oil wells can obtain industrial oil flow under the current technical con?ditions based on the well test results and dynamic production data for Chang 7 tight oil reservoirs in the Xin'anbian oil field of the Ordos Basin.The criteria were established using core observation,petrophysical logging results,reservoir analysis,and well?logging response. We found that the effective fine sandstone formation has porosity greater than 5.5%,and permeability greater than 0.03×10-3μm2.Mercury injection experiments under constant rate showed that the channel radius is greater than 0.25 μm,the movable fluid saturation is greater than 30%,and the interval acoustic transit time in well logging is larger than 215 μs/m. In the"sweet spot"zone, oil saturation ishigher, and the measured gas value in well cutting logging is 3 times higher than that of the baseline,and the resistivity is greater than 30 Ω·m.The maximum thickness tolerance for a single oil layer in well drilling should be greater than 4 m,and the thickness of multi?layer oil is more than 6 m.In optimization,favorable zones were firstly selected from the sedimentary facies belt,and then the lower limit criteria of reservoir physical properties and layer thickness to make"sweet spot"zone selection. During development, oil saturation and adjacent well performance were considered for reducing the risk of low yield or low efficiency areas. Through the screening analysis of the technical indicators above,the proven oil reserve is up to 100 million tons in the Xin'anbian oil field.关键词
致密油下限标准/有效储层/甜点优选/长7致密油/新安边油田/鄂尔多斯盆地Key words
lower limit criteria of tight oil/effective reservoir/"sweet spot"zone optimization/Chang 7 tight oil reservoir/Xin'anbian oil field/Ordos Basin分类
能源科技引用本文复制引用
何崇康,成良丙,陈旭峰,孙钿翔,李超,赵国玺..鄂尔多斯盆地新安边油田长7致密油有效储层识别与甜点优选[J].石油实验地质,2017,39(6):812-818,7.基金项目
国家重大科技专项"鄂尔多斯盆地致密油开发示范工程"(2017ZX05069)和中国石油天然气股份有限公司重大科技专项"长庆油田5000万吨持续高效稳产关键技术研究与应用"(2016E-05)联合资助. （2017ZX05069）
