塔河油田碳酸盐岩油藏提高采收率方法  

Methods for Enhancing Oil Recovery in Carbonate Reser-Voirs of Tahe Oilfield

作　　者：张永禄 金化线[1] 谷旭 黄磊[1] ZHANG Yong-lu;JIN Hua-xian;GU Xu;HUANG Lei(Sinopec Northwest Oilfield Branch,Urumqi Xinjiang 830000,China)

机构地区：[1]中国石化西北油田分公司,新疆乌鲁木齐830011

出　　处：《西部探矿工程》2025年第2期17-19,26,共4页West-China Exploration Engineering

摘　　要：塔河油田缝洞型油藏开发一般经过弹性驱、近井溶洞弹性与远井水体混合驱、托锥刚性水驱、底水突破水驱等阶段。由于储集体的非均质性强,注水注气波及范围受到致密碳酸盐岩阻挡,动用范围有限,短半径侧钻则能有效沟通原井附近未动用或少动用储集体;油层原始弹性能量逐步衰减,注水通过密度差异实现油水置换和横向驱替的同时,补充地层能量;注气补充能量,横向驱替,通过重力分异还可实现对顶部剩余油的置换,一般要求油井附近上部储集体发育,有一定的储气空间;底水突破阶段,油水博弈,水体通过优势通道使油井含水上升,甚至是爆性水淹,对油井生产危害很大,通过注入化学堵剂对优势水通道进行一定的封堵,可有效提高油井后期采收率。Generally,the development of fracturevape reservoir in Tahe oilfield goes through the stages of elastic flooding,mixed flooding of near-well cave elastic and far-well water body,rigid water flooding of support cone,and bottom water breakthrough water flooding.Due to the strong heterogeneity of the reservoir,the impact range of water injection gas is blocked by tight carbonate rocks,and the application range is limited.Short radius sidetracking can effectively communicate the unused or less used reservoir near the original well.The original elastic energy of the reservoir gradually decreases,and water injection achieves oil-water displacement and transverse displacement through density difference,while replenishing the formation energy.Gas injection can replenish energy,lateral displacement,and the top remaining oil can be replaced by gravity differentiation.Generally,the upper reservoir group near the well is required to develop and have a certain gas storage space.In the bottom water breakthrough stage,oil water game,water through the dominant channel makes the oil well water rise,or even explosive water flooding,which is very harmful to the oil well production.By injecting chemical plugging agent to a certain extent to the dominant water channel,it can effectively improve the oil well recovery in the later stage.

关 键 词：塔河油田 注水 短半径侧钻 注气 化学堵水 

分 类 号：TE3444[石油与天然气工程—油气田开发工程]