底水油藏水平井射孔密度优化  

Horizontal Well Perforation Density Optimization in the Reservoirs with Bottom Water

作　　者：蒋贝贝[1] 李海涛[2] 袁锦亮[3] 莫建珍[4] 姜雨省[1] 张俊松[1] 王昕立[1] 

机构地区：[1]西南石油大学研究生院,四川成都610500 [2]西南石油大学石油工程学院,四川成都610500 [3]中石化西北油田分公司雅克拉采气厂,新疆库车842172 [4]新疆油田公司石西油田作业区,新疆克拉玛依834000

出　　处：《石油天然气学报》2010年第6期284-287,共4页Journal of Oil and Gas Technology

摘　　要：水平井开发底水油藏时,水平井筒内因流体的变质量流动而引起压力降,从而使沿水平井段的流量剖面不均匀,对于非均质性严重的油藏,这种现象更加明显。这将会导致许多生产问题如底水的早期突破等,会大大降低油藏采收率。在考虑井筒内压降的基础上对底水油藏渗流及井筒内流动进行了研究,建立了射孔水平井底水油藏模型、井筒压降模型及其油藏/井筒耦合模型。针对压降带来的生产问题,提出了一种新的优化射孔孔密分布的方法,均衡了沿井筒的流量分布。利用水平井射孔优化设计软件,对某非均质严重的水平井进行了孔密优化设计,证明了此孔密分布优化模型的正确性和实用性。When reservoirs with bottom water were produced by using horizontal wells,pressure drop would be induced in the wellbore because of variable mass flow causing non-uniform inflow profile along the wellbore.For reservoirs with severe non-homogenety,this effect would be more obvious,it would result in a number of production problems,such as water/gas coning breakthrough early to decrease the recovery ratio greatly.On basis of considering the wellbore pressure drop,the fluid flow through porous medium in bottom water drive reservoirs and flow in the wellbore were analyzed.A bottom water reservoir model and a model of pressure drop in the wellbore and reservoir-wellbore coupling model were built.In allusion to the problem of pressure drop,a new optimal design of perforation density distribution is made to equalize the inflow profile along wellbore.By using optimized perforation software of horizontal well,a design for optimizing perforation density of a horizontal well with severe inhomogeneity is made to simulate the model,it proves to be correct and practicable.

关 键 词：底水油藏 水平井 射孔 控水 耦合模型 孔密 优化 

分 类 号：TE257.1[石油与天然气工程—油气井工程]