Calcic interbed evaluation and multi-stage frac optimization for high deviation wells in Chang-7 reservoir， Ba-19 Block of Huanjiang Oilfield

SONG Jingyuan; YAO Mou; JING Wenping; LIU Shengzhan; MAO Guanhua; ZHANG Heng and JI Changwei; ${author.authorNameEn}

doi:10.12143/j.ztgc.2021.10.004

2021 Vol. 48, No. 10

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Article navigation > DRILLING ENGINEERING > 2021 > 48(10): 29-35

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SONG Jingyuan, YAO Mou, JING Wenping, LIU Shengzhan, MAO Guanhua, ZHANG Heng and JI Changwei, . 2021. Calcic interbed evaluation and multi-stage frac optimization for high deviation wells in Chang-7 reservoir， Ba-19 Block of Huanjiang Oilfield. DRILLING ENGINEERING, 48(10): 29-35. doi: 10.12143/j.ztgc.2021.10.004

Citation:

SONG Jingyuan, YAO Mou, JING Wenping, LIU Shengzhan, MAO Guanhua, ZHANG Heng and JI Changwei, . 2021. Calcic interbed evaluation and multi-stage frac optimization for high deviation wells in Chang-7 reservoir， Ba-19 Block of Huanjiang Oilfield. DRILLING ENGINEERING, 48(10): 29-35. doi: 10.12143/j.ztgc.2021.10.004

Calcic interbed evaluation and multi-stage frac optimization for high deviation wells in Chang-7 reservoir， Ba-19 Block of Huanjiang Oilfield

1. Beijing Institute of Exploration Engineering, Beijing 100083, China;
2. No.7 Oil Production Plant of Changqing Oilfield, Huanxian Gansu 745700, China;
3. SPT Energy Group, Beijing 100012, China

Received Date: 09 December 2020

Revised Date: 28 April 2021

Abstract

Abstract

In order to maximize reservoir contact and improve reservoir productivity， highly deviated wells are used in Chang-7 reservoir， Ba-19 block of Huanjiang Oilfield. In the earlier frac treatment， negligence of the influence of the calcic interbed on fracture height led to a very different actual fracture geometry from the design， resulting in the problems of fracture channeling between wells and high water cut production. With examination of reservoir profile logging characteristics， analysis of the vertical stress distribution based on the subdivision layers， and investigation of the key factors of “the composite layer effect” affecting fracture height extension， the multi-stage fracturing scheme was optimized which produced a better hydraulic fracture geometry and size. The technical modification improved fracturing treatment quality with the good rate of fracture stimulation in Chang-7 reservoir up 100%； Thus， greatly improving the development level in the area.
- multi-stage frac /
- calcic interbed /
- high deviation well /
- composite layer effect /
- Huanjiang Oilfield

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References

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