基于地质力学方法的深层致密气藏高效勘探技术：以库车坳陷迪北气藏为例

徐珂; 杨海军; 张辉; 赵斌; 尹国庆; 王志民; 王海应

doi:10.3799/dqkx.2022.379

Volume 48 Issue 2

Feb. 2023

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Article Navigation > Earth Science > 2023 > 48(2): 621-639

Xu Ke, Yang Haijun, Zhang Hui, Zhao Bin, Yin Guoqing, Wang Zhimin, Wang Haiying, 2023. Efficient Exploration Technology of Deep Tight Gas Reservoir Based on Geomechanics Method: a Case Study of Dibei Gas Reservoir in Kuqa Depression. Earth Science, 48(2): 621-639. doi: 10.3799/dqkx.2022.379

Citation:

Xu Ke, Yang Haijun, Zhang Hui, Zhao Bin, Yin Guoqing, Wang Zhimin, Wang Haiying, 2023. Efficient Exploration Technology of Deep Tight Gas Reservoir Based on Geomechanics Method: a Case Study of Dibei Gas Reservoir in Kuqa Depression. Earth Science, 48(2): 621-639. doi: 10.3799/dqkx.2022.379

Citation:

Xu Ke, Yang Haijun, Zhang Hui, Zhao Bin, Yin Guoqing, Wang Zhimin, Wang Haiying, 2023. Efficient Exploration Technology of Deep Tight Gas Reservoir Based on Geomechanics Method: a Case Study of Dibei Gas Reservoir in Kuqa Depression. Earth Science, 48(2): 621-639. doi: 10.3799/dqkx.2022.379

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Efficient Exploration Technology of Deep Tight Gas Reservoir Based on Geomechanics Method: a Case Study of Dibei Gas Reservoir in Kuqa Depression

doi: 10.3799/dqkx.2022.379

PetroChina Tarim Oilfield Company, Korla 841000, China

Received Date: 2022-11-12
Publish Date: 2023-02-25

Abstract

Abstract

To clarify the favorable reservoir distribution, determine associated engineering technology, and improve the exploration efficiency in Dibei tight gas reservoir of Kuqa Depression, the in situ stress field prediction and fracture effectiveness evaluation were analyzed based on geomechanics method in this study. In addition, the efficiency of sweet spot drilling and fracturing stimulation were considered, and the directional wellbore trajectory was quantitatively optimized based on the integration of geology and engineering. The results show that: (1) the in situ stresses and natural fractures largely determine the quality and fracturing efficiency of deep tight gas reservoirs, affecting the productivity of gas wells; (2) the Dibei gas reservoir has strong heterogeneity, resulting in significantly differences in petrophysical characteristics, in situ stress and fracture effectiveness among wells. The distribution of fracture sweet spots in Dibei gas reservoir is discrete, and the difficulty of reservoir stimulation is greatly restricted by geological factors. (3) Natural fractures greatly control high-quality sweet spots of deep tight gas reservoirs, and they can reduce the difficulty of fracturing operations and improve fracturing stimulation efficiency; (4) Directional wells should penetrate more low-stress zones and natural fractures and fully match the direction of natural fractures and in situ stress to improve single-well production. The vertical well drilling mode has limitations in the efficient exploration of Dibei tight gas reservoirs. Directional wells can take into account the efficiency of sweet spot drilling and fracturing stimulation and have advantages in terms of drilling safety and stability.
- deeply buried tight gas reservoir,
- oil and gas exploration,
- geomechanics,
- directional well,
- integration of geology and engineering,
- Kuqa depression,
- petroleum geology

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