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塔河油田缝洞型凝析气藏注水采气先导性试验
石油实验地质
2016年 38卷 第S1期
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Title
Pilot test for gas production of fractured-vuggy condensate gas reservoir by water injection in Tahe oil field
Authors
Li Zongrui
Hao Yang
单位
中国石化 西北油田分公司 采油一厂, 新疆 轮台 841600
Organization
No. 1 Oil Production Plant, SINOPEC Northwest Oilfield Company, Luntai, Xinjiang 841600, China
摘要
塔河油田X区奥陶系X25井区为碳酸盐岩缝洞型凝析气藏，此类气藏地质特征表现为基质不储集油气，储集体主要为裂缝、孔洞、溶洞。该井区主要是相对封闭的单井缝洞单元，天然水体能量不足，生产动态表现出明显的定容特征，地层能量下降导致气井停喷后由于液面太深无法通过机采手段继续生产。面对此类气藏开发后期无常规手段继续生产的开发困境，技术人员打破思维枷锁，创新提出了在此类气藏进行注水采气的先导性试验，通过向定容体气井注水补充亏空能量，压缩气体体积，使其恢复自喷能力继续生产。此项试验成功探索出了一条提高缝洞型碳酸盐岩凝析气藏天然气采收率的新途径。
Abstract
The X25 well block in the Tahe oil field is a condensate gas reservoir with fractured-vuggy carbonates in Ordovician. Its substrate does not reserve oil and gas, and the main reservoirs are cracks, holes and caves. This area is mainly single well units, lacking of natural water energy. Production performance shows significant volume characteristics. With the decline of formation energy, gas wells stop producing by pumping due to deep liquid level. Facing such dilemma, we innovated a pilot test with water injection. Water was injected into gas well to supply energy and compress gas volume, hence made production continued. The success of this experiment explored a new EOR way in such gas reservoirs.
关键词：
缝洞型碳酸盐岩;
凝析气藏;
定容;
注水采气;
塔河油田;
Keywords:
fractured-vuggy carbonate rock;
condensate gas reservoir;
constant volume;
water injection for gas production;
Tahe oil field;
DOI
https://doi.org/10.11781/sysydz2016S1044
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