摘要
在同一口井中既存在异常高压储层,又存在低压或常压储层,为达到高低压储层分层开发目的,研究出高低压层一体化射孔技术。在完井程序上,首先采用常规负压射孔射开低压层,然后在井筒充满低密度完井液情况下,采用射孔管柱与分层生产管柱相结合的方式,射开异常高压及以下层系的同时,实现了分层开发的目的。针对高低压层一体化射孔管柱,采用爆轰波波形叠加算法,分析封隔器承载力,保证高压气井井筒完整性。东海X井采用该技术负压射孔成功后,井口压力快速上涨至18.69 MPa,直接达到自喷条件,投产后保持天然气30×10^(4)m^(3)/d、凝析油60 m^(3)/d的稳定产量,达到配产预期的3倍,效果显著。该技术为油气藏产能释放提供了新的思路,有效防止异常高压层射开后的井涌或井喷事故,具有较好的推广价值。
In the same well,there are both abnormally high pressure reservoirs and low pressure or normal pressure reservoirs.In order to achieve the goal of layered development of high and low pressure reservoirs,an integrated perforation technology for high and low pressure reservoirs was developed.In the well completion procedure,conventional negative pressure perforation is used to open the low pressure formation at first,and then,the method of combining perforation string with layered production string is used to open the abnormally high pressure and the following layers when the wellbore is full of low-density completion fluid,so as to achieve the goal of layered development.For the integrated perforation string in high and low pressure layers,the detonation wave waveform superposition algorithm is used to analyze the packer bearing capacity to ensure the wellbore integrity of the high-pressure gas well.After the successful negative pressure perforation of X Well with this technology in East China sea,the wellhead pressure rises rapidly to 18.69 MPa,which directly meets the condition of flowing.After being put into production,the natural gas is kept at 30×10^(4)m^(3)/d and the oil is kept at 60 m^(3)/d,the real production is three times of the expected production allocation,which has an obvious effect.This technology provides a new idea for the deliverability release of oil and gas reservoirs,and effectively prevents the well kick or blowout accident after the abnormal high pressure layer is opened,which has a good promotion value.
作者
王友春
WANG Youchun(China Offshore Oilfield Services LTD.,Shanghai 200050,China)
出处
《油气井测试》
2022年第6期22-26,共5页
Well Testing
关键词
高低压层
分层开采
生产射孔一体化
波形叠加算法
井筒完整性
储层保护
产能释放
井控风险
high and low pressure formation
separate layer production
combination of production and perforation
waveform superposition algorithm
wellbore integrity
reservoir protection
capacity release
well control risk
