Blockage formation in water-flooding heavy oil reservoirs: The distribution rule and the scaling mechanism
Jiang H. Kang W. Zhou B. Wang F. Yang H. Li Z. He Y. Shao Y. Sarsenbekuly B. Gabdullin M. Turtabayev S.
1 August 2021American Institute of Physics Inc.
Physics of Fluids
2021#33Issue 8
Blockage is a common problem in the development of water-flooding reservoirs. The key to solve this problem is to determine the composition and distribution rules of the blockage. In this work, the location distribution and components of blockage were analyzed by one-dimensional (1D) and two-dimensional (2D) cores, and x-ray diffraction and differential weight methods. The blockage formation mechanism was also studied. The 1D experimental results show that the blocking locations of the inlet and outlet ends are 3/10 and 8/10, respectively (1D core is divided into 10 equidistant sections; “3/10” refers to the three sections from the inlet end and “8/10” refers to the two sections from the outlet end). The blockage near the inlet is mainly composed of inorganic scale, which is formed by a combination of the carbonate and coarse sand particles. However, the blockage near the outlet is mainly composite scale, which is formed by the fine particles and inorganic scale with heavy oil. In addition, the water sensitivity with clay leads to the decrease in permeability. This work provides a theoretical and scientific basis for the development of technology to effectively prevent reservoir blockage.
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Key Laboratory of Unconventional Oil and Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao, 266580, China
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, China
Kazakh-British Technical University, Almaty, 050000, Kazakhstan
Khoja Akhmet Yassawi International Kazakh-Turkish University, Turkestan, 161200, Kazakhstan
Key Laboratory of Unconventional Oil and Gas Development
School of Petroleum Engineering
Kazakh-British Technical University
Khoja Akhmet Yassawi International Kazakh-Turkish University
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