首页    期刊浏览 2022年12月09日 星期五
登录注册

文章基本信息

  • 标题:Productivity Model for Shale Gas Reservoir with Comprehensive Consideration of Multi-mechanisms
  • 本地全文:下载
  • 作者:Ya Deng ; Rui Guo ; Zhongyuan Tian
  • 期刊名称:Open Petroleum Engineering Journal
  • 印刷版ISSN:1874-8341
  • 出版年度:2015
  • 卷号:8
  • 期号:1
  • 页码:235-247
  • DOI:10.2174/1874834101508010235
  • 出版社:Bentham open
  • 摘要:

    Multi-stage fracturing horizontal well currently has been proved to be the most effective method to produce shale gas. This method can activate the natural fractures system defined as stimulated reservoir volume (SRV), the remaining region similarly is defined as un-stimulated reservoir volume (USRV). At present, no type curves have been developed for hydraulic fractured shale gas reservoirs in which the SRV zone has triple-porosity dual-depletion flow behavior and the USRV zone has double porosity flow behavior. In this paper, the SRV zone and USRV zone respectively are simplified as cubic triple-porosity and slab dual porosity media. We have established a new productivity model for multifractured horizontal well shale gas with Comprehensive consideration of desorption, diffusion, viscous flow, stress sensitivity and dual-depletion mechanism in matrix. The rate transient responses are inverted into real time space with stehfest numerical inversion algorithm. Type curves are plotted, and different flow regimes in shale gas reservoirs are identified. Effects of relevant parameters are analyzed as well. The whole flow period can be divided into 8 regimes: bilinear flow in SRV; pseudo elliptic flow; dual inter-porosity flow; transitional flow; linear flow in USRV; inter-porosity flow and boundary-dominated flow. The stress sensitivity basically has negative influence on the whole productivity period .The less the value of Langmuir volume and the lager the value of Langmuir pressure, the more lately the inter-porosity flow and boundary-dominated flow occurs. It in concluded that the USRV zone has positive influence on production and could not be ignored.

国家哲学社会科学文献中心版权所有