塔河油田碎屑岩凝析气藏延长自喷期方法技术研究

Techniques to prolong flowing period of clastic rock gas condensate reservoir,Tahe Oil Field

罗得国 詹新 芦林山

Luo Deguo Zhan Xin Lu Linshan

中国石化 西北油田分公司 塔河采油一厂,新疆 轮台 841605

No.1 Tahe Production Plant,SINOPEC Northwest Company,Luntai,Xinjiang 841605,China

地层水锥进会严重影响气井的生产能力和气藏的采收率。地层水锥进可能导致衰竭式开采的效率变差,有锥进的井可能较早报废,锥进也影响作业、产量及开采的经济性。塔河地区气藏多为中—高孔隙度,中—高渗透率的水驱凝析气藏,对于这类气藏,中边底水舌进、锥进是影响气藏采收率的主导因素,在目前的开采方式下,气藏的水体侵入又是不可避免的,延缓地层水锥进及降低水的产出是气田提高采收率的关键因素。要使水驱气藏获得较高的采收率就必须针对水体舌进、锥进采取有效的对应措施。本文主要从控制单井产量延长气井无水采气期和降低携液临界量延长气井自喷期两方面进行研究,探讨延长气井自喷期的有效方法。

Formation water coning may seriously affect gas well production capacity and gas reservoir re-covery rate.It causes the depletion of development efficiency and the early scrapping of wells,and alsoaffects the economy of field work,production and exploitation.Reservoirs in the Tahe Oil Field aremainly water-driving gas condensate ones with middle-high porosity and permeability.As to these res-eYVOIYS,edge-bottom water tonguing and coning are the key factors controlling recovery rate.At pres-ent,the water intrusion in gas pools is inevitable.It is necessary to reduce formation water coning andoutput so as to improve recovery rate.Treatments for water tonguing and coning are required.Studieshave been carried out from 2 aspects:a)controlling single well product and prolonging water-freeperiod;b)reducing critical fluid volume and prolonging flowing period.Some effective methods toprolong flowing period have been discussed.

https://doi.org/10.11781/sysydz2011S1092