文章摘要
生物礁气藏水平井产能预测研究
Study on productivity prediction of Horizontal Wells in organic reef gas reservoirs
投稿时间:2021-07-16  修订日期:2021-07-16
DOI:
中文关键词: 生物礁  气藏  水平井  产能预测
英文关键词: Reef  gas reservoir  horizontal well  productivity prediction
基金项目:国家科技重大专项“超深层复杂生物礁底水气藏高效开发技术”(编号2016ZX05017-005);中国石化科技部重大项目“元坝气田长兴组气藏剩余气分布及稳产对策研究”(编号:KJ-586-2010)
作者单位邮编
任世林 中国石油化工股份有限公司西南油气分公司勘探开发研究院 610041
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中文摘要:
      气井准确的产能评价是是制定合理开发技术政策的基础,国内外针对生物礁气藏提出的产能预测模型较少,该类气藏普遍具有渗透率低、平面非均质性强,易受到启动压力梯度、应力敏感等因素的综合影响,准确的预测产能是存在的技术瓶颈,本文在前人研究基础上,结合生物礁气藏水平井实际渗流特征,通过拟三维方法、保角变换法和等值渗流阻力法建立了生物礁气藏水平井产能预测模型,对不同水平段长度、裂缝条数、裂缝长度下的产能进行了对比分析,增加水平段长度、裂缝条数及长度对生物礁气藏水平井产能具有积极的影响,但要考虑经济效益,这些因素存在最优范围。通过分析不同因素对产能的影响趋势,对生物礁气藏的科学合理开发具有实际指导意义。
英文摘要:
      The accurate productivity evaluation of gas wells is the basis of formulating reasonable development technical policies. There are few productivity prediction models for reef gas reservoirs at home and abroad, which generally have low permeability and strong plane heterogeneity, it is easy to be influenced by starting pressure gradient, stress sensitivity and so on. The accurate prediction of productivity is the technical bottleneck. On the basis of previous studies, combining with the actual percolation characteristics of horizontal wells in biohermal gas reservoirs, a productivity prediction model for horizontal wells in biohermal gas reservoirs is established by means of pseudo-three-dimensional method, conformal transformation method and equivalent flow resistance method, increasing horizontal section length, fracture number and length has positive influence on horizontal well productivity of Organic Reef Gas Reservoir, but economic benefit should be considered, these factors have optimal range. Through analyzing the influence trend of different factors on productivity, it has practical significance for the scientific and reasonable development of organic reef gas reservoir.
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