西南石油大学学报(自然科学版) ›› 2016, Vol. 38 ›› Issue (6): 119-124.DOI: 10.11885/j.issn.1674-5086.2015.11.11.25

Previous Articles     Next Articles

Interlayer Interference Evaluation by the Recovery Rate Interference Factor for the Waterflooding Oil Reservoir in the Medium-late Period

XIE Yiting1, CHEN Zhaohui1, CHAI Xiaoying2, JI Yun2   

  1. 1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chendu, Sichuan 610500, China;
    2. Exploration and Development Institute, CNPC Qinghai Branch, Dunhuang, Gansu 736202, China
  • Received:2015-11-11 Online:2016-12-01 Published:2016-12-01

Abstract: Pressure between payzones that connect the production or injection wellbore will be balanced automatically. This process will deplete production degree of each layer but increase difference of pressure and fluid distribution of each layer for water flooding reservoirs. In the Medium-late period after Overall Development Plan(ODP), the real-time adjustment or modification were required since the ODP may not be the best as long as more and more static and dynamic information from reservoir has been put into the reservoir model. In addition, the performance of interlayer interference will keep changing following in-situ stress and fluid distribution during production and injection development procedure. It is obvious that criteria are required to make the reasonable infill and strata subdivision plan in the medium-late development phase. In this study, the interlayer inference was evaluated by the oil recovery rate interference factor with productivity and reserves and was defined as the ratio of oil recovery rates between commingling payzones. Furthermore, the analysis charts were calculated by numerical simulation to evaluate the balanced level of commingling multilayer reservoir development. The results indicated that production rate adjustment can fix lower level unbalanced development due to minor interlayer interference phenomena and strata subdivision is required during higher heterogenous waterflooding. Results show the best development performance would be the equal oil recovery rate between each commingling payzones.

Key words: multilayer reservoir, development adjustment, interlayer interference, recovery rate interference factor, commingling production

CLC Number: