花3近临界态挥发性油藏衰竭开发动态特征及剩余开发潜力分析  被引量:4

Dynamic production performance in a natural depletion and evaluation on remaining production potential of Hua 3 near-critical volatile reservoir

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作  者:李良峰[1] 

机构地区:[1]中国石油大港油田滩海开发公司,天津300280

出  处:《石油化工应用》2015年第10期4-10,33,共8页Petrochemical Industry Application

基  金:中国石油天然气股份有限公司十二五重大科技项目"天然气开发关键技术研究"的资助;项目编号:2011B-1507

摘  要:花3区块为福山凹陷西北部受三条断层加持的扁鼻状构造油气藏。油藏流体为近临界态挥发油,探明地质储量轻质挥发油89×104t,天然气13.7×108m3。采用衰竭开发,到2014年3月,凝析油采出程度17.5,溶解气采出程度34.2;目前地层压力保持水平仅为38,已进入开发中后期。为了进一步认识花3区块挥发油藏衰竭开采过程生产动态变化规律,进而明确开发后期提高油藏采收率主体技术,本文综合运用流体相态特征、生产指示曲线、生产井携液能力、动态储量计算、剩余开发潜力等多种动态分析方法开展花3区块开发动态及剩余开发潜力分析,发现花3区块开采过程具有从挥发油转变为凝析气的开采特征,地层中尚有70的凝析油未被采出,具有较大的剩余开发潜力,从而为开发后期采用循环注气恢复和保持一定压力提高采收率技术提供了技术支持。Hua 3 block is a flat-nose shaped structural reservoir crossed by three faults in the northwest of Fushan sag. The reservoir fluid behaves as near-critical volatile oil. The proven geological reserves consist of 89 ×104t light volatile oil and 13.7 ×108m3natural gas.With a natural depletion, 17.5 % condensate oil and 34.2 % dissolved gas have been covered by March 2014, and the reservoir pressure has been only 38 % of the original one which indicates the entry into middle-late stage of production. As for a further understanding of production performance in the natural depletion of Hua 3 reservoir in order to determine the supporting technology for EOR in the late stage, several dynamic analysis approaches including fluid phase behavior analysis, production index curves, liquid entrainment capacity of production wells, dynamic reseves and remaining production potential analysis have been carried out to study dynamic production performance and remaining potential of Hua 3 block. The result shows that the fluid behaves from volatile oil to condensate gas during the depletion production and there is still 70 % condensate oil remained underground which implies a big potential, thus providing technical support for gas cycling for reservoir pressure recovery and maintenance in the late production stage.

关 键 词:近临界态 挥发油藏 衰竭开采 开发动态 开发潜力 

分 类 号:TE331[石油与天然气工程—油气田开发工程]

 

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