纯107块低渗透油藏注气开采数值模拟研究

The numerical simulation study on gas injection development for the low-permeability reservoir of Chun-107-fault new block

黄凯 李闽 李道轩 李春芹 梁彬

Huang Kai Li Min Li Daoxuan Li Chunqin Liang Bin

中国石油化工股份有限公司西南油气分公司, 四川南充 637000; 西南石油大学, 四川成都 610500; 中国石化胜利油田有限公司纯梁采油厂, 山东博兴 252604

Xinan Oil & Gas Conpany, SINOPEC, Nanchong 637000, China; SWPI, Chengdu 610500, China; The Chunliang Production Plant of Shengli Oil field Ltd., SINOPEC, Boxing 252604, China

纯107块新区油田是低渗透油藏。这类油藏注水开发困难、井况较差、油井产量低。"注气开发"是国内外针对低渗透油藏最为有效的开采方法。针对纯107块新区的地质特征及开发现状,研究了注气开采方案,运用数值模拟器论证了不同井数、不同注入气体、不同注气速度、不同注气时机对油藏开发指标和开发效果的影响。研究结果表明:该油藏通过注气开采,能大幅度提高该区块的原油采收率;不同注气速度、注入介质对增油和提高采收率效果明显;新增生产井和注气井,也可大幅度增加原油产量。

Chun-107-fault new block is low permeable. These reservoirs have difficulty in water injection, poor well condition, and low production. Gas injection is the most efficient recovery method for low-permeability reservoirs at home and abroad. In accordance with the geological features and development actuality, the recovery schemes of gas injection are studied by using numerical simulator, the effect of such factors like different wells, different injected gas, different injection rate, and different timing of gas injection on the development index and development results are demonstrated. The result of the study indicates, for the oil fields of the Chun-107-fault new block, gas injection can obviously affect the oil production and the oil recovery factor; different injection rate and injection material can obviously improve the oil recovery factor; adding producing wells and injecting wells can dramatically enhance the oil production and improve the oil recovery factor.