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| 水-岩作用对储层渗透性影响的数值模拟研究——以鄂尔多斯盆地东北部上古生界砂岩储层为例 | |
| 引用本文： | 杨冰,许天福,李凤昱,田海龙,杨磊磊. 水-岩作用对储层渗透性影响的数值模拟研究——以鄂尔多斯盆地东北部上古生界砂岩储层为例[J]. 吉林大学学报(地球科学版), 2019, 49(2): 526-538. DOI: 10.13278/j.cnki.jjuese.20170236 |
| 作者姓名： | 杨冰 许天福 李凤昱 田海龙 杨磊磊 |
| 作者单位： | 1. 中国地质大学(北京)水资源与环境学院, 北京 100083;2. 中核第四研究设计工程有限公司, 石家庄 050021;3. 吉林大学新能源与环境学院/地下水资源与环境教育部重点实验室(吉林大学), 长春 130021;4. 中国石油大学(北京)提高采收率研究院, 北京 102249 |
| 基金项目： | 中国石油天然气股份有限公司科学研究与技术开发项目（2014A-0514）；国家科技重大专项（2016ZX05016-005-002） |
| 摘 要： | 油气储层的质量及演化往往受沉积作用和成岩作用的共同制约，成岩作用是影响储层孔渗最直接的因素，水-岩反应贯穿于整个成岩作用阶段，决定了孔渗的演化过程。本次研究以鄂尔多斯盆地东北部上古生界陆源碎屑岩储层下石盒子组-山西组为对象，运用多相流反应溶质运移数值模拟的方法，定量研究水-岩化学作用对含油气盆地储层渗透性能的影响，再现水-岩反应所造成的储层矿物溶解、沉淀以及储层渗透性的变化。结果表明：在成岩作用初期，矿物溶解过程占主导地位，模型运行50 Ma时，储层孔隙度由初始的0.30增至0.36，渗透率由初始的5.00×10-15 m2增至8.70×10-15 m2；在油气充注阶段（气体CO2为主），整个成岩作用矿物的沉淀量大于矿物的溶解量，导致固相体积增加，模型运行20 Ma时，储层孔隙度由0.20降低至约0.15，渗透率由5.00×10-13 m2下降至约2.00×10-13 m2。 |
| 关 键 词： | 鄂尔多斯盆地 水-岩反应 油气勘探 数值模拟 |
| 收稿时间： | 2017-09-21 |
Numerical Simulation on Impact of Water-Rock Interaction on Reservoir Permeability: A Case Study of Upper Paleozoic Sandstone Reservoirs in Northeastern Ordos Basin |
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| Yang Bing,Xu Tianfu,Li Fengyu,Tian Hailong,Yang Leilei. Numerical Simulation on Impact of Water-Rock Interaction on Reservoir Permeability: A Case Study of Upper Paleozoic Sandstone Reservoirs in Northeastern Ordos Basin[J]. Journal of Jilin Unviersity:Earth Science Edition, 2019, 49(2): 526-538. DOI: 10.13278/j.cnki.jjuese.20170236 | |
| Authors: | Yang Bing Xu Tianfu Li Fengyu Tian Hailong Yang Leilei |
| Affiliation: | 1. School of Water Resource & Environment, China University of Geosciences, Beijing 100083, China;2. The Fourth Research and Design Engineering Corporation of CNNC, Shijiazhuang 050021, China;3. College of New Energy and Environment of Jilin University/Key Laboratory of Groundwater Resources and Environment(Jilin University), Ministry of Education, Changchun 130021, China;4. Institute of Enhanced Oil Recovery, China University of Petroleum, Beijing 102249, China |
| Abstract: | The quality and evolution of oil and gas reservoirs are often controlled by sedimentation and diagenesis. Diagenesis is the most direct factor affecting porosity and permeability of reservoirs. The evolution of porosity and permeability is determined by water-rock reaction throughout the whole process of diagenesis.The clastic rock reservoir of Lower Shihezi-Shanxi Group in the northeast Ordos basin was taken as the study object. Reactive transport modeling was used to carry out the quantitative research on the effects of water-rock interaction on the permeable properties of the reservoir in oil, gas bearing basin and on the changes of reservoir permeability and reservoir mineral dissolution, precipitation. The results show that in the early stage of diagenesis, mineral dissolution was dominant, which increased porosity of reservoir from 0.30 to 0.36 and permeability of reservoir from 5.00×10-15 m2 to 8.70×10-15 m2 respectively. During the oil and gas filling stage (mainly CO2), the precipitation of mineral was dominant in the whole geochemical reaction, resulting in the decrement of porosity (from 0.20 to 0.15) and permeability (from 5.00×10-13 m2 to 2.00×10-13 m2). |
| Keywords: | Ordos basin water-rock interaction oil and gas exploration numerical simulation |
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