异常高压枯竭气藏型储气库地质体四维地质力学分析——以西南X储气库为例

doi:10.13722/j.cnki.jrme.2022.0685

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Abstract The pressure varies greatly in the depletion stage of abnormally high-pressured gas reservoir(AHGR)，and the peak pressure in the alternating injection-production stage cannot reach the original formation pressure after AHGR was reconstructed into underground gas storage(UGS)，which makes conventional methods not applicable to its geomechanical evaluation，thus leads to a lack of systematic evaluation method. In order to ensure the safe and efficient operation of UGS that reconstructed from AHGR，the X abnormally high pressure gas reservoir was selected as the study object，and both of its reservoir pressure field at the end of depletion and the stress and strain fields obtained from geomechanical numerical simulation were selected for data interactive transmission. Then，the dynamic coupling model of trap in-situ stresses and reservoir seepage is established. Finally，using the method of combining finite difference and finite element，the 4D geomechanical characteristics of trap geological body were evaluated systematically and accurately by regard the trap of UGS as the basic evaluation unit. In the end，the 4D geomechanical evaluation method，which can provide effective support for the evaluation of the UGS reconstructed from AHGR，is established.

Key words： oil-gas storage abnormal high pressure exhausted gas storage alternating stress dynamic coupling model of trap stress and reservoir seepage 4D geomechanics

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	Articles by authors
	YANG Junwei1
	JIA Shanpo1
	2
	FU Xiaofei2
	3
	XU Meng2
	3
	ZHANG Guangquan4
	WANG Zhechao5
	WU Guojun6

Cite this article:

YANG Junwei1,JIA Shanpo1,2, et al. 4D geomechanical analysis of geological bodies in abnormally high pressure exhausted gas storage：A case study of Southwest X gas storage[J]. , 2023, 42(S2): 4189-4203.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0685 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS2/4189

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