Productivity Prediction and Influencing Factors of Low Permeability Reservoirs after Steering Fracturing Stimulation

新疆石油地质 ›› 2021, Vol. 42 ›› Issue (zk(English)): 140-144.

Productivity Prediction and Influencing Factors of Low Permeability Reservoirs after Steering Fracturing Stimulation

PU Xiao¹, GUO Dali¹, LAN Tian^2a, HE Yong^2b, ZHAO Yunxiang¹

1. School of Sciences, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. PetroChina Xinjiang Oilfield Company a.Oil Production Plant No.1; b. Baikouquan Oil Production Plant, Karamay, Xinjiang 834000, China

出版日期:2022-01-01 发布日期:2023-07-28

Productivity Prediction and Influencing Factors of Low Permeability Reservoirs after Steering Fracturing Stimulation

PU Xiao¹, GUO Dali¹, LAN Tian^2a, HE Yong^2b, ZHAO Yunxiang¹

1. School of Sciences, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. PetroChina Xinjiang Oilfield Company a.Oil Production Plant No.1; b. Baikouquan Oil Production Plant, Karamay, Xinjiang 834000, China

Online:2022-01-01 Published:2023-07-28
About author:PU Xiao, E-mail: swpuxiao@163.com

摘要/Abstract

摘要： Steering fracturing can expand the drainage area of low permeability reservoirs and achieve the effect of volume fracturing. However, the fractures induced by steering fracturing are complicated, and should be finely characterized to accurately predict the post-fracturing productivity. Based on the production data from Karamay oilfield, and in view of the characteristics of steering fractures, a mathematical model of single-phase flow was established, and a grid refinement technology was used to densify the steering fractures. Field application has proved that the oil production after steering fracturing was 5.3 times higher than that of conventional fracturing. The factors influencing the productivity after steering fracturing were evaluated and the result shows that the production is positively correlated with reservoir per permeability, steering fracture length and conductivity of initial induced fractures, but not necessarily depending on steering fractures to get a high flow conductivity.

关键词: low permeability oilfield, steering fracturing, local grid densification, grid refinement, mathematical model, productivity prediction, influencing factor

Abstract: Steering fracturing can expand the drainage area of low permeability reservoirs and achieve the effect of volume fracturing. However, the fractures induced by steering fracturing are complicated, and should be finely characterized to accurately predict the post-fracturing productivity. Based on the production data from Karamay oilfield, and in view of the characteristics of steering fractures, a mathematical model of single-phase flow was established, and a grid refinement technology was used to densify the steering fractures. Field application has proved that the oil production after steering fracturing was 5.3 times higher than that of conventional fracturing. The factors influencing the productivity after steering fracturing were evaluated and the result shows that the production is positively correlated with reservoir per permeability, steering fracture length and conductivity of initial induced fractures, but not necessarily depending on steering fractures to get a high flow conductivity.

Key words: low permeability oilfield, steering fracturing, local grid densification, grid refinement, mathematical model, productivity prediction, influencing factor

PU Xiao, GUO Dali, LAN Tian, HE Yong, ZHAO Yunxiang. Productivity Prediction and Influencing Factors of Low Permeability Reservoirs after Steering Fracturing Stimulation[J]. 新疆石油地质, 2021, 42(zk(English)): 140-144.

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Productivity Prediction and Influencing Factors of Low Permeability Reservoirs after Steering Fracturing Stimulation

Productivity Prediction and Influencing Factors of Low Permeability Reservoirs after Steering Fracturing Stimulation

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