| 考虑应力敏感性影响的三项式产能方程 |
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| 作者姓名： | 肖香姣 罗盈 王小培 刘启国 常志强 张建业 |
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| 作者单位： | 中国石油塔里木油田分公司勘探开发研究院 新疆 库尔勒 841000,西南石油大学“油气藏地质及开发工程”国家重点实验室 四川 成都 610500,中国石油塔里木油田分公司勘探开发研究院 新疆 库尔勒 841000,西南石油大学“油气藏地质及开发工程”国家重点实验室 四川 成都 610500,中国石油塔里木油田分公司勘探开发研究院 新疆 库尔勒 841000,中国石油塔里木油田分公司勘探开发研究院 新疆 库尔勒 841000 |
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| 摘 要： | 低渗透气藏存在较强的应力敏感性,大量岩石实验数据回归研究表明,幂函数渗透率应力敏感性经验方程相关性相对较好,而前人利用该关系式来研究低渗透气藏气井产能的报道较少。在这样的背景下,利用幂函数应力敏感性经验公式,综合考虑渗透率应力敏感效应、启动压力梯度、紊流效应和表皮系数,建立了一个新的适用于低渗透异常高压气井的三项式产能方程。不同参数组合情况下的气井流入动态曲线对比研究结果表明,应力敏感性、启动压力梯度和紊流效应对低渗透气藏气井产能的影响较大,在产能评价研究时必须予以考虑。
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| 关 键 词： | 应力敏感 启动压力梯度 紊流效应 产能方程 流入动态曲线 *基金项目:本文受国家科技重大专项“塔里木盆地库车前陆冲断带油气开发示范工程”子课题(2011ZX5046-03)资助。 |
A New Trinomial Deliverability Equation with Stress Sensibility |
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| Authors: | Xiao Xiangjiao Luo Ying Wang Xiaopei Liu Qiguo Chang Zhiqiang and Zhang Jianye |
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| Institution: | Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000, China,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China,Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000, China,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China,Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000, China and Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000, China |
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| Abstract: | Stress sensitivity is strong in low-permeability reservoir. The regression effect using power function of permeability is very excellent for many empirical data of core, but related report on productivity of low permeability reservoir using power function of permeability is rare. A novel productivity equation of gas reservoirs of abnormal pressure and low permeability with the consideration of threshold pressure gradient, turbulent effect and stress-sensitivity is established using the power function equation. The inflow performance curves (IPR) are also plotted under different combination of these effect parameters. The conclusions of this paper show that these parameters have significant effect on the productivity of low-permeability gas wells, which should be taken into account when assessing productivity. |
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| Keywords: | stress sensitivity threshold pressure gradient turbulent effect deliverability equation IPR |
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