| 曹聪慧,张宇琪.松辽盆地朝阳沟阶地 C51储气库密封性评价[J].矿产勘查,2025,16(7):1676-1685 |
| 松辽盆地朝阳沟阶地 C51储气库密封性评价 |
| Evaluation of the tightness of Chaoyanggou terrace Chao 51 gas storage in Songliao Basin |
| 投稿时间：2024-01-26 |
| DOI：10.20008/j.kckc.202507010 |
| 中文关键词: 枯竭气藏 储气库 盖层密封性 断层密封性 |
| 英文关键词: depleted gas reservoir gas storage cap tightness fault tightness |
| 基金项目:本文受大庆油田有限责任公司“大庆四站储气库群工程微地震项目”(DQGLJ-2021-JS-636)资助。 |
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| 中文摘要: |
| 将枯竭砂岩型油气藏改建为储气库的前提条件是气藏具有良好的密封性，如果气藏的密封性不好，在改建储气库的过程中存在严重安全风险隐患。本文利用岩心突破压力、渗透率测试实验评价盖层密封性；综合黏土涂抹势、泥岩涂抹系数、断层泥比率、断面正压力判断断层封闭性，形成本区断层密封性评价体系；另根据库仑破损函数和地应力成果，利用软件 GMI·MorFracs进行稳定性评价，结果表明研究区盖层宏观微观上密封性好，断层侧向封闭性较好、垂向封闭性好，且在当前应力下稳定。研究结果进一步论证了 C51气藏改建储气库的密封性和可行性。 |
| 英文摘要: |
| The prerequisite for converting depleted sandstone-type oil and gas reservoirs into gas storage facili-ties is that the reservoirs have good sealing properties. If the sealing is poor, there are significant safety risks duringthe conversion process. This paper uses core breakthrough pressure and permeability testing to evaluate the sealingof the cap rock. It synthesizes clay smear effects, mudstone smear coefficients, fault mud ratios, and normal pressureto determine fault sealing, forming an evaluation system for the sealing properties of faults in this area. Additionally,based on Coulomb failure functions and geological stress results, stability assessments were performed using GMI.MorFracs software. The results indicate that the cap rock in the study area has good sealing properties both macro-scopically and microscopically, with relatively good lateral and vertical sealing of faults, and it is stable under cur-rent stress conditions. The research further demonstrates the sealing and feasibility of converting the 51 gas reser-voir into a gas storage facility. |
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