Optimization of Operational Parameters for Deep Displacement Involving Polymer Microspheres in Low Permeability Reservoirs of the Changqing Oilfield

JIA Yuqin; ZHENG Mingke; YANG Haien; ZHOU Guangqing

doi:10.11911/syztjs.2018030

Volume 46 Issue 1

Jan. 2018

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Petroleum Drilling Techniques > 2018 > 46(1): 75-82. > DOI: 10.11911/syztjs.2018030

JIA Yuqin, ZHENG Mingke, YANG Haien, ZHOU Guangqing. Optimization of Operational Parameters for Deep Displacement Involving Polymer Microspheres in Low Permeability Reservoirs of the Changqing Oilfield[J]. Petroleum Drilling Techniques, 2018, 46(1): 75-82. DOI: 10.11911/syztjs.2018030

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Optimization of Operational Parameters for Deep Displacement Involving Polymer Microspheres in Low Permeability Reservoirs of the Changqing Oilfield

1.
Oil & Gas Technology Research Institute, PetroChina Changqing Oilfield Company, Xi’an, Shaanxi, 710018, China;
2.
National Engineering Laboratory of Exploring & Developing Low-Permeability Oil and Gas Field, Xi’an, Shaanxi, 710018, China;
3.
PetroChina Changqing Oilfield Company, Xi’an, Shaanxi, 710018, China

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Received Date: July 01, 2017
Revised Date: October 24, 2017

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Abstract

Abstract

To enhance the application effect of deep displacement with polymer microspheres in low-permeability and heterogeneous reservoirs of the Changqing Oilfield,the lab tests for observing polymer microspheres of different sizes and simulating core flow have been performed on the bases of the pilot test,and optimized microsphere sizes in different stages with low,medium and high water cuts,respectively.The lab tests also determined the operation parameters and slug combinations for deep displacement by polymer microspheres in stages with various water cuts.The innovative technology has been deployed in 43 wells in Ansai,Xifeng,Jing’an,Jiyuan and other oilfields,with average natural productivity decline rates over 3.0 percentage point,average reduction of watercut increase rate of 2.2 percentage point,cumulative oil increment over 16 000 tons,cumulative water production drop of 21 400 m3.Indoor and field test showed that deep displacement with polymer microspheres had better adaptability to low permeability reservoirs in the Changqing Oilfield,it has effectively eliminated the problems,including water production in different directions,quick increases in water cuts,low productivity of single wells etc.,in development of low permeability reservoirs in the Changqing Oilfield.
- low permeability reservoir,
- polymer microspheres,
- deep displacement,
- slug combination,
- injection time,
- Changqing Oilfield

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Optimization of Operational Parameters for Deep Displacement Involving Polymer Microspheres in Low Permeability Reservoirs of the Changqing Oilfield

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