The Open Fuels & Energy Science Journal

2016, 9 : 77-90
Published online 2016 October 31. DOI: 10.2174/1876973X01609010077
Publisher ID: TOEFJ-9-77

RESEARCH ARTICLE
 Optimal Designs of Well Pattern for the Development of Tight Gas Reservoirs (TGRs)

Jiao Yuwei1, * , Xia Jing1 , Yan Jianye2 and Xu Daicai2

* Address correspondence to this author at the CNPC Research Institute of Petroleum Exploration & Development, Beijing 100083, ; Tel: 86.134-6679-9517; E-mail: jywkty@163.com

ABSTRACT

Both horizontal well and fractured-horizontal well have been widely used to develop TGRs. However, the costs of horizontal well and fractured-horizontal well are much higher than the vertical well. Therefore, it is necessary to consider the reservoir conditions for evaluating the potential benefit when choosing well pattern or designing well parameters. In this paper, a simulator of simulating the development of TGRs including slippage flow and stress dependence in matrix, and high-velocity non-Darcy flow and stress effect in hydraulic fractures was firstly developed. Then, it was used to study the development effects of different TGRs using different well patterns and well parameters. Based on the simulation results, the incremental ratio models of horizontal well to vertical well and fractured-horizontal well to horizontal well were achieved. These models can be used to predict the incremental production using horizontal well or fractured-horizontal well. We also obtained the plates of choosing well pattern and designing the corresponding parameters to achieve a good profit in the field.

Keywords:

Fractured-horizontal well, Horizontal well, Optimal design, Tight gas reservoir, Well pattern.