loading page

Experimental analysis of acidizing in Weizhou X low permeability reservoir
  • +4
  • Yi Zhang,
  • hongjun lu,
  • * weifeng,
  • bin zhang,
  • qi zhang,
  • rui wang,
  • pengyu zhu
Yi Zhang
Xi'an Shiyou University

Corresponding Author:[email protected]

Author Profile
hongjun lu
Changqing Petroleum Exploration Bureau
Author Profile
* weifeng
China National Offshore Oil Corporation - Guangzhou
Author Profile
bin zhang
Xi'an Shiyou University
Author Profile
qi zhang
Changqing Petroleum Exploration Bureau
Author Profile
rui wang
Xi'an Shiyou University
Author Profile
pengyu zhu
Xi'an Shiyou University
Author Profile

Abstract

The Weizhou X low-permeability reservoir is an offshore reservoir, with a permeability ranging from 0.58×10 -3μm 2 to 470.05×10 -3μm 2, showing strong heterogeneity. In the subsequent water injection development, good results were not always obtained. The main problem was that during the water injection process, the injection pressure increased significantly, resulting in low water injection volume and low water injection efficiency, which could not maintain long-term effective effects on production. Improvement, it is difficult to replenish energy in the formation. Through the analysis of pore-throat structure, water quality compatibility and sensitivity, it is clear that pore-throat blockage is the main reason for low water injection efficiency. Aiming at the present situation that the scaling matter is mainly calcium carbonate, a solution to soil acidification and plugging removal was proposed, and the water injection damage of the actual reservoir was simulated. The indoor acidification experiment was carried out, which showed that the effect of acidification on the transformation of the reservoir was good, and the average rate of transformation is 129.21%. Suggestions are put forward for the effective development of Weizhou X low-permeability reservoirs, the economic benefits of development are improved, and guidance is given for the enhanced injection measures of low-permeability oilfields.
Submitted to Engineering Reports
24 Jan 2024Review(s) Completed, Editorial Evaluation Pending
06 Feb 2024Editorial Decision: Revise Major
14 Mar 20241st Revision Received
01 Apr 2024Submission Checks Completed
01 Apr 2024Assigned to Editor
01 Apr 2024Reviewer(s) Assigned
15 Apr 2024Review(s) Completed, Editorial Evaluation Pending
16 Apr 2024Editorial Decision: Accept