华北低渗透油藏烃气驱最小混相压力实验研究
Experimental Research on Minimum Miscible Pressure of Hydrocarbon Gas Flooding in Huabei Low Permeability Reservoir
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- 引用格式:
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黄伟,任红梅,王莉,王哲,王睿思,邵敏敏,马樱,马铨铮.华北低渗透油藏烃气驱最小混相压力实验研究[J].天然气与石油,2015,33(4):0.doi:
Huang Wei, Ren Hongmei, Wang Li, Wang Zhe, Wang Ruisi, Shao Minmin, Ma Ying, Ma Quanzheng.Experimental Research on Minimum Miscible Pressure of Hydrocarbon Gas Flooding in Huabei Low Permeability Reservoir [J].Natural Gas and Oil,2015,33(4):0.doi:
- DOI:
- 作者:
- 黄 伟1,2 任红梅1 王 莉1 王 哲1 王睿思1 邵敏敏1 马 樱1 马铨铮2
Huang Wei, Ren Hongmei, Wang Li, Wang Zhe, Wang Ruisi, Shao Minmin, Ma Ying, Ma Quanzheng
- 作者单位:
- 1.中国石油华北油田分公司勘探开发研究院, 2.中国石油大学石油工程教育部重点实验室
1.Exploration and Development Research Institute, PetroChina Huabei Oil Company; 2.MOE Key Laboratory for Petroleum Engineering, China University of Petroleum
- 关键词:
- 最小混相压力；烃类气驱；自然衰竭；注入压力；采出程度
Minimum miscible pressure; Hydrocarbon gas flooding; Natural depletion; Injection pressure; Recovery
- 摘要:
- 为快速、准确地确定低渗透油藏注烃气驱提高原油采出程度技术的注气压力,进行了最小混相压力测定实验。通过细管实验方法结合华北油田Q区块的实际开发特点,研究了该区块自然衰竭开采效果以及原油在原始地层条件(压力24 MPa,温度74 ℃)及目前地层条件(压力15 MPa低于饱和压力,温度74 ℃)下与烃气混相的最小压力及气体突破时间,为该区块低渗透油藏烃类气驱注入压力的选择提供依据。实验结果表明：Q区块在目前地层条件下注烃类气驱的最小混相压力(62.75 MPa)要高于原始地层条件下的最小混相压力(54.77 MPa),并且注入压力越高,烃气突破越晚,最终采出程度越高。在目前油藏条件下不能实现混相驱,但适当提高注入压力,可实现烃气与原油近混相,最终达到提高原油采出程度的目的。
Experiments of measuring minimum miscibility pressure are conducted in order to determine the hydrocarbon gas injection pressure fast and accurately in the low permeability reservoir with lower pressure than the original reservoir saturation pressure. In combination with the actual development characteristics of Block Q in Huabei Oil Field, tubule experimental method is applied to study the natural depletion effect, minimum miscibility pressure of hydrocarbon gas flooding and gas breakthrough time under the original reservoir conditions (reservoir pressure 24 MPa and reservoir temperature 74 °C ) and the current reservoir conditions (reservoir pressure 15 MPa, lower than the saturation pressure, and the reservoir temperature 74 °C ), which can provide a basis for hydrocarbon gas injection pressure of low permeability reservoir in the block. Experimental results show that the minimum miscible pressure (62.75 MPa) of hydrocarbon gas flooding in Block Q under the current reservoir conditions is higher than that (54.77 MPa) of the original reservoir conditions. The higher the injection pressure, the later the breakthrough time of hydrocarbon gas and the higher recovery can be obtained. Miscible flooding cannot be realized under the current reservoir conditions. But the higher injection pressure can make hydrocarbon gas and crude oil to reach the near mixed-phase state so that oil recovery can be improved.
