岩性油气藏 ›› 2016, Vol. 28 ›› Issue (3): 121–126.doi: 10.3969/j.issn.1673-8926.2016.03.016

• 技术方法 • 上一篇    下一篇

致密砂岩气藏气水同产水平井产能公式推导及应用

袁 淋1,王朝明2,李晓平3,胡新佳1,曾 力1   

  1. 1. 中国石化西南油气分公司 川东北采气厂,四川 阆中 637402 ; 2. 中国石油长庆油田分公司 第十采油厂,
    甘肃 庆阳 745600 ; 3. 油气藏地质及开发工程国家重点实验室 · 西南石油大学,成都 610500
  • 出版日期:2016-05-20 发布日期:2016-05-20
  • 第一作者:袁淋( 1990- ),男,硕士,主要从事气藏动态分析以及天然气集输等方面的研究工作。 地址:( 637402 )四川省阆中市七里大道川东北采气厂。 E-mail : yuanlin343@163.com
  • 基金资助:

    国家杰出青年科学基金项目“油气渗流力学”(编号: 51125019 )资助

Deduction and application of productivity formula for horizontal well with producing water in tightsandstone gas reservoir

Yuan Lin1, Wang Chaoming2, Li Xiaoping 3, Hu Xinjia 1, Zeng Li 1   

  1. 1. Northeastern Sichuan Gas Production PlantSinopec Southwest Oil and Gas Field CompanyLangzhong 637402SichuanChina2.No.10 Oil Production PlantPetroChina Changqing OilfieldCompanyQingyang 745600GansuChina3.State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengdu 610500China
  • Online:2016-05-20 Published:2016-05-20

摘要:

致密砂岩气是具有较大潜力的非常规天然气资源,但由于其具有低孔、低渗特征以及受气井产水的影响,其储层流体的渗流不满足传统达西渗流规律。 基于 Joshi 水平井产能分析理论,考虑气井产水、应力敏感、滑脱效应以及气体高速非达西渗流对产能的影响,定义了气水两相广义拟压力,并根据气水两相渗流理论,推导了致密砂岩气藏气水同产水平井产能计算新公式。 通过实例计算与对比发现,利用新公式计算的无阻流量与试气无阻流量相对误差仅为 6.60% ,验证了该公式的准确性。 敏感性分析结果表明,随着生产水气比以及应力敏感指数的逐渐增大,气井无阻流量逐渐减小,而随着滑脱因子的逐渐增大,气井无阻流量逐渐增大。

关键词: 抗盐聚合物, 普通中分聚合物, 流体力学直径, 孔隙结构, 松辽盆地

Abstract:

Tight sandstone gas is unconventional natural gas resources with great potential at present, but because of the gas reservoir with low porosity and low permeability and the effect of gas well producing water, the seepage of the fluid in the gas reservoir will no longer meet the traditional Darcy ’ s law. Based on the Joshi ’ s theory on productivity of horizontal well, considering the effect of gas well producing water, stress sensitivity, slip effect and high-speed non-Darcy flow of gas on productivity, this paper defined the generalized pseudo pressure of gas-water two phase, and used the seepage theory of gas-water two phase to deduce a new binomial productivity formula of horizontal well with gas-water two phase in tight sandstone gas reservoir. Case study and correlation shows that the absolute open flow calculated by new formula has a small relative error with that calculated by gas well-testing, just 6.60%, which indicates that the new formula will beof highaccuracy. Sensitivity analysis shows that as the increasing of volume ratio between water and gas and stress sensitivity index, the absolute open flow of horizontal well will decrease, while as the increasing of slip factor,the absolute open flow will become increasing as well.

Key words: salt-resistant polymer, common polymer, hydrodynamic diameter, pore structure

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