Main controlling factors of production and reasonable fracturing scale optimization of deep coalbed methane wells in Shenfu block, Ordos Basin

SUN Lichun; LIU Jia; LI Na; LI Xinze; WEN Heng

doi:10.11781/sysydz2025010043

Volume 47 Issue 1

Jan. 2025

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SUN Lichun, LIU Jia, LI Na, LI Xinze, WEN Heng. Main controlling factors of production and reasonable fracturing scale optimization of deep coalbed methane wells in Shenfu block, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2025, 47(1): 43-53. doi: 10.11781/sysydz2025010043

Citation:

SUN Lichun, LIU Jia, LI Na, LI Xinze, WEN Heng. Main controlling factors of production and reasonable fracturing scale optimization of deep coalbed methane wells in Shenfu block, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2025, 47(1): 43-53. doi: 10.11781/sysydz2025010043

Citation:

SUN Lichun, LIU Jia, LI Na, LI Xinze, WEN Heng. Main controlling factors of production and reasonable fracturing scale optimization of deep coalbed methane wells in Shenfu block, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2025, 47(1): 43-53. doi: 10.11781/sysydz2025010043

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Main controlling factors of production and reasonable fracturing scale optimization of deep coalbed methane wells in Shenfu block, Ordos Basin

doi: 10.11781/sysydz2025010043

SUN Lichun^{1, 2
,},
LIU Jia^{1, 2
,
,},
LI Na¹,
LI Xinze¹,
WEN Heng¹

1.
Beijing Research Center of CNOOC, Beijing 100028, China
2.
China United Coalbed Methane Co., Ltd., Beijing 100016, China

Received Date: 2024-10-08
Rev Recd Date: 2024-11-26
Publish Date: 2025-01-28

Abstract

Abstract

The production of deep coalbed methane (CBM) wells in the Shenfu block of Ordos Basin varies greatly, with a lack of understanding of the main controlling factors. To further reveal the production patterns in deep CBM wells, identify key factors affecting well production capacity, and guide the efficient development of deep CBM resources in the Shenfu block, this study analyzed the production dynamic characteristics of typical CBM wells in the area based on basic geological data, production data, and previous research results. Through individual well comparisons and overall trend analysis, the main controlling factors influencing CBM well production in the Shenfu block were identified. The results showed that the gas content and fracturing scale have the greatest impact on production. Pearson's multivariate correlation regression analysis was used to quantitatively evaluate the impact of various factors on production capacity. The factors affecting post-fracturing production capacity of deep CBM wells, ranked by correlation, are as follows: gas content > fracturing sand amount > construction flow rate > fracturing fluid volume > structural depth > thickness. Under certain geological conditions, a reasonable fracturing scale is key to the efficient development of deep CBM wells. An integrated "geological reservoir, fracturing, and economic evaluation" approach was adopted, with economic benefits as the objective. Numerical simulation was conducted to study the coupled optimization of well spacing and fracturing scale. The results determined that the optimal well spacing for the Shenfu block was 300 m, the optimal cluster spacing was 20 m, and the optimal fracture half-length was 120 m. These findings provide technical support for the efficient development of deep CBM resources in the Shenfu block.
- well spacing,
- fracturing scale,
- main controlling factors of production,
- production prediction model,
- deep coalbed methane,
- Shenfu block,
- Ordos Basin

All authors declare no relevant conflict of interests.
The study was designed by SUN Lichun and LI Na. The dynamic analysis was completed by LI Xinze and WEN Heng. The manuscript was drafted and revised by LIU Jia and LI Xinze. All authors have read the final version of the paper and consented to its submission.

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References

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张文，黄红星，刘莹，冯延青，孙伟，李子玲，王婧，赵增平. 鄂尔多斯盆地保德区块煤层气井可采储量与产气特征研究. 油气藏评价与开发. 2025(02): 257-265 .

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沈阳化工大学材料科学与工程学院沈阳 110142

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