CAO Xiaopeng.Microscopic characteristics analysis and flow simulation of shale oil reservoir[J].Journal of Shenzhen University Science and Engineering,2021,38(6):605-612.[doi:10.3724/SP.J.1249.2021.06605]





Microscopic characteristics analysis and flow simulation of shale oil reservoir
中国石化胜利油田分公司勘探开发研究院,山东东营 257015
CAO Xiaopeng
Exploration and Development Research Institute of Sinopec Shengli Oilfield Company, Dongying 257015, Shandong Province, P.R.China
oil and gas well development engineering shale oil digital rock Navier-Stokes equation organic matter flow simulation
与常规油藏相比,页岩储层孔隙空间复杂且类型多样,呈现典型的多尺度特征.为提高开发页岩油藏效率,有必要对页岩储层微观孔隙结构精确刻画,并准确表征页岩油在微观孔隙间的流动规律.以胜利油田页岩为研究对象,采用X射线计算机断层成像(X-ray computed tomography, XCT)与扫描电镜表征页岩的多尺度微观孔隙结构.考虑页岩壁面的滑移和吸附,基于Navier-Stokes方程建立数字岩心内页岩油的流动模型.研究发现,页岩岩样中的孔隙和裂缝体积占比为20.89%,其中,孔隙半径小于50 nm的数量超过50%;有机质体积分数为4.52%,有机质中发育的孔隙较少,表明页岩岩样的成熟度不高;页岩岩样中机质孔隙壁面的吸附降低了页岩油的渗透率,对页岩油的流动影响较大,特别是在有机质孔隙分布较多的页岩储层.无机质壁面的滑移提高了页岩油的渗透率,在无机质孔隙分布较多的页岩储层,滑移对页岩油流动具有重要影响.
Shale reservoirs have more complex and more diverse pore spaces than conventional oil reservoirs, showing typical multi-scale characteristics. The accurate description of the microscopic pore structure of reservoirs and the accurate characterization of shale oil flow low are extremely important for the efficient development of shale reservoirs. In this work, X-ray computed tomography (XCT) imaging and scanning electron microscope experimental research on the rock sample from Shengli Oilfield are utilized to depict the multi-scale micro pore structure of shale. Considering the slip and adsorption on the rock surface, the shale oil flow model in the digital core is established based on the Navier-Stokes equation. The results show that the proportion of pores and cracks in shale rock samples is 20.89%, of which more than 50% of the pore radii are less than 50 nm. The proportion of organic matter is 4.52%, and the less developed pores in organic matter indicate the less maturity of shale samples. The adsorption on the surface of organic pore reduces the permeability of shale oil and has a greater impact on the flow of shale oil, especially in shale reservoirs with more organic pores. Furthermore, the slippage on the surface of the inorganic pore increases the permeability of shale oil. In shale reservoirs with more inorganic pores, the slippage has an important influence on the flow of shale oil.


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Foundation:National Science and Technology Major Special Project of China (2017ZX05009-004);Basic Prospective Project of Sinopec(P25508-1-2)
Corresponding author:Senior engineer CAO Xiaopeng.E-mail: caoxiaopeng.slyt@sinopec.com
Citation:CAO Xiaopeng. Microscopic characteristics analysis and flow simulation of shale oil reservoir[J]. Journal of Shenzhen University Science and Engineering, 2021, 38(6): 605-612.(in Chinese)
作者简介:曹小朋(1983—),中国石化胜利油田分公司高级工程师. 研究方向:油气田开发工程. E-mail:caoxiaopeng.slyt@sinopec.com
引文:曹小朋. 页岩油储层微观特征分析与流动模拟[J]. 深圳大学学报理工版,2021,38(6):605-612.
更新日期/Last Update: 2021-11-30