自主式流量控制技术在低粘度强底水油藏中的应用  

Water Control Applications on Low-viscosity Oil Reservoir with Strong Aquifer Underneath by Using Autonomous Inflow Control Device

作　　者：刘成林 任杨 刘伟 Liu Chenglin;Ren Yang;Liu Wei(Shenzhen Branch of CNOOC Ltd.,Shenzhen 518000;Shenzhen Branch of CNOOC EnerTech-Drilling&Production Co.,Shenzhen 518000,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司陆丰油田作业区,广东深圳518000 [2]中海油能源发展股份有限公司工程技术深圳分公司井下技术中心,广东深圳518000

出　　处：《广东化工》2021年第17期60-63,共4页Guangdong Chemical Industry

摘　　要：AICD(Autonomous Inflow Control Device)控水完井技术在国内外大量的应用表明,AICD技术能够有效抑制或延缓边底水锥进,实现油井增产以及提高油田采收率的目标。众所周知,对于未投产的新井,AICD控水的适用条件之一是要求地层原油粘度大于1.5 mPa·s。而对于地层原油粘度低于1.5 mPa·s的油藏,由于原油的流体性质跟地层水比较接近,对于AICD控水装置的灵敏性和精度提出了严峻的挑战,目前为止国内外还没有AICD控水在此粘度范围应用的公开记录。本文以中海油深圳分公司AA油田的地层原油粘度1.471 mPa·s的低粘度边底水油藏水平井作为AICD控水应用实例,充分验证了AICD控水在低粘度原油油藏中的控水效果。与常规意义上的AICD控水完井不同的是,本井是目前世界范围内成功实施AICD控水完井的地下原油粘度最低的油井,对于中海油南海油田低粘度原油的控水增油生产和开发具有开创性的历史意义。It was proven that Autonomous Inflow Control Device technology(hereinafter referred to as AICD)can effectively restrain or mitigate edge-or bottom-water driven oil reservoir from water conning,thus achieving the objectives of improving oil production and oil recovery of the reservoir.As we know,one of prerequisites of AICD water control for a new well is that viscosity of in-situ formation oil is higher than 1.5 mPa·s.However,for oil reservoir with its viscosity lower than 1.5 mPa·s,which largely challenges the sensibility and precision of AICD tools,till now there haven’t been seen from open records globally that AICD have been utilized to control early water break-through.This paper takes a horizontal well with bottom-water driven low-viscosity oil reservoir as an application example of AICD,where viscosity of in-situ formation oil is as low as 1.471 mPa·s,to further verify the value of AICD water control applications on low-viscosity reservoir.Different from conventional AICD water control wells,this well opens a new worldwide record of the lowest oil viscosity in which AICD was successfully carried out in an oil well,hence opening innovatively a new chapter of developing bottom-water driven,high water cut and low-viscosity oil reservoir in South China Sea for CNOOC.

关 键 词：AICD控水 跟趾效应 低粘度强底水油藏 底水锥进 控水 附加压差 

分 类 号：TE357[石油与天然气工程—油气田开发工程]