论文部分内容阅读
鄂尔多斯盆地姬塬油田长6储层原油储量丰富,储层致密制约着油气的勘探开发潜力和评价精度.通过开展物性、粒度、铸体薄片、X衍射、扫描电镜、压汞等测试研究储层特征,以时间为主轴,综合成岩史、埋藏史、地热史、构造等因素,采用“成岩作用模拟”和“地质效应模拟”构建孔隙度演化模型及计算方法探讨致密储层成因机理.结果表明:储层经过较强的演化改造发育微-纳米孔喉系统,形成低孔特低孔-超低渗的致密砂岩储层.H53井长6段孔隙度演化史揭示了增孔和减孔因素对孔隙度及油气充注的影响;通过对比最大粒间孔面孔率、最大溶蚀面孔率、最大压实率、最大胶结率样品孔隙度演化路径和含油饱和度,查明了致密储层成因的差异及品质.
Reservoirs in Chang 6 reservoir of Jiyuan Oilfield in the Ordos Basin are rich in reservoirs, and tight reservoirs restrict the exploration and development potentials and evaluation accuracy of oil and gas reservoirs.Studies on reservoirs by means of physical properties, grain size, cast thin films, X-ray diffraction, SEM and mercury intrusion Features, the main axis of time, comprehensive diagenesis history, burial history, geothermal history, tectonic and other factors, using “diagenesis simulation” and “geological simulation” to build porosity evolution model and calculation method to explore the causes of tight reservoirs Mechanism.The results show that the reservoir has undergone strong evolutionary transformation to develop a micro-nano-pore throat system to form a low-porosity and ultra-low permeability tight sandstone reservoir.The evolution history of the porosity of the sixth member of the H53 well reveals the increase of porosity And pore-reducing factors on the porosity and oil-gas filling. By comparing the maximum intergranular pore rate, the maximum eroded porosity, the maximum compaction rate, the porosity evolution path of the maximum cementing rate and oil saturation, Differences and quality of reservoir causes.