岩性油气藏 ›› 2015, Vol. 27 ›› Issue (4): 113–118.doi: 10.3969/j.issn.1673-8926.2015.04.017

• 油气田开发 • 上一篇    下一篇

水侵对低渗水驱气藏水平井产量的影响

袁 淋1,李晓平2,王常青3   

  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. 西南石油大学 油气藏地质及开发工程国家重点实验室,成都 610500 ; 3. 中国石油长庆油田分公司 第一采气厂,陕西 靖边 718500
  • 出版日期:2015-07-20 发布日期:2015-07-20
  • 作者简介:袁淋( 1990- ),男,硕士,主要从事油气藏工程以及渗流力学方面的研究工作。 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

Effect of water invasion on production of horizontal well in low permeability water drive gas reservoir

Yuan Lin1, Li Xiaoping2, Wang Changqing3   

  1.  1. Northeastern Sichuan Gas Production Plant , Southwest Oil and Gas Field , Sinopec , Langzhong 637402 , Sichuan , China ;2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation , Southwest Petroleum University , Chengdu 610500 , China ;3. No. 1 Gas Production Plant , PetroChina Changqing Oilfield Company , Jingbian 718500 , Shannxi , China
  • Online:2015-07-20 Published:2015-07-20

摘要:

在低渗水驱气藏开发过程中,即使水平井井底未见水,但水体局部推进仍是影响水平井产量的重要因素。 基于 Joshi 方法,将水平井三维渗流场简化为远井地带与近井地带 2 个二维渗流场,考虑远井地带局部水体推进以及低渗储层渗流特征,利用保角变换方法建立了求解低渗水驱气藏局部水侵时水平井产量变化规律的新模型。 敏感性分析表明,随着水侵体积比、水体推进距离以及应力敏感指数的逐渐增大,水平井产量逐渐减小,而随着储层原始渗透率以及滑脱因子的逐渐增大,水平井产量逐渐增大,但对于高压气藏、产水气藏以及生产压差较小的气井,滑脱效应以及应力敏感对产量的影响可以忽略不计。此项研究可为低渗水驱气藏水侵过程中水平井产量变化规律研究提供新的思路。

关键词: 沉积特征, 晚白垩世, 古近纪, 准噶尔盆地

Abstract:

During the developing of low permeability water drive gas reservoir, even if water did not breakthrough at the bottom of the horizontal well, local water invasion was still an important factor for affecting the production of horizontal well. Based on the Joshi method, this paper simplified the three-dimensional seepage field of horizontal well into two two-dimensional seepage fields, namely the zone far from well and near wellbore, considering the local water invasion in the zone far from well and flow characteristic in low permeability gas reservoir, used the method of conformal transformation to build a new model for studying the production change law of horizontal well during the water invasion in low permeability water drive gas reservoir. Sensitivity analysis indicates that as the increasing of gas-water volume ratio, distance of water advance and stress sensitivity index, the production of horizontal well decreases, while as the increasing of primary formation permeability and slip factor, the production of horizontal well also increases, unless in the high pressure gas reservoir, water-bearing gas reservoir and gas wells with lower producing pressure drop, the effect of slippage effect and stress sensitivity on production can be neglected. This study can provide a new solution to study production change law of horizontal well during water invasion in low permeability water drive gas reservoir.

Key words: sedimentary characteristics, Late Cretaceous, Paleogene, Junggar Basin

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