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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摘要异常高压气藏开发阶段压力变化幅度较大，且其改建储气库后交变注采阶段上限压力无法达到原始地层压力，在其地质力学问题评价时，常规方法不适用，缺乏系统的评价技术。为了更好地保障异常高压气藏型储气库安全、高效的运行，以X异常高压枯竭气藏为对象，选取开发末期储层压力场和地质力学数值模拟得到的应力、应变场进行数据交互传递，建立圈闭地应力–储层渗流动态耦合模型，采用有限差分与有限元结合的方法，以储气库圈闭为基本评价单元，系统、准确地评价圈闭地质体的四维地质力学问题，形成异常高压枯竭气藏型储气库圈闭地质体四维地质力学问题评价技术，为同类气藏改建储气库后的地质力学问题评价提供技术支撑。

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	杨军伟1
	贾善坡1
	2
	付晓飞2
	3
	徐萌2
	3
	张广权4
	王者超5
	伍国军6

关键词 ：油气储存, 异常高压枯竭气藏型储气库, 交变应力, 圈闭地应力&ndash, 储层渗流动态耦合模型, 四维地质力学

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

引用本文:

杨军伟1，贾善坡1，2，付晓飞2，3，徐萌2，3，张广权4，王者超5，伍国军6. 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[J]. 岩石力学与工程学报, 2023, 42(S2): 4189-4203.
YANG Junwei1，JIA Shanpo1，2，FU Xiaofei2，3，XU Meng2，3，ZHANG Guangquan4，WANG Zhechao5，WU Guojun6. 4D geomechanical analysis of geological bodies in abnormally high pressure exhausted gas storage：A case study of Southwest X gas storage. , 2023, 42(S2): 4189-4203.

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

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