An optimal fracture geometry design method of fractured horizontal wells in heterogeneous tight gas reservoirs

作     者：ZENG FanHui KE YuBiao GUO JianChun 

作者机构：State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation Southwest Petroleum University 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51525404 51504203&51374178) Open Fund(Grant No.PLN1515)of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University) a special fund from China’s central government for the development of local colleges and universities-the National First-level Discipline in the Oil and Gas Engineering Project(Grant No.20150727) Scientific Research Starting Project of Southwest Petroleum University(Grant No.2014QHZ004) 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2016年第59卷第2期

页      码：241-251页

摘      要：In this work, the unified fracture design （UFD） is extended for the first time to the fractured horizontal wells in heterogeneous closed box-shaped tight gas reservoirs. Utilizing the direct boundary element method and influence function, the dimensionless fracture productivity index is obtained and expressed in the function of proppant volume and fracture geometry at the pseu- do-steady state. With the iterative method, the effectively propped permeability, kfe, is corrected using the i^-situ Reynolds number, NRe. The goal of this paper is to present a new UFD extension to design the proppant volume and the optimal fracture geometry. The results show that there exists an optimal proppant volume for a certain reservoir. The small aspect ratio （yJXe） and high permeability reservoirs need short and wide fractures to diminish the non-Darcy effect. On the contrary, long and narrow fractures are required for the large aspect ratio and low permeability reservoirs. A small proppant volame is prone to creating long fractures, while a relatively large proppant volume creates wide fractures. The new extension can be used to evaluate the previous fracture parameters and design the following fracture parameters of the fractured horizontal well in heterogeneous tight gas reservoirs, with the non-Darcy effect taken into account.

主 题 词：tight gas reservoir heterogeneity non-Darcy effect fractured horizontal well fracture geometry design 

学科分类：0820[工学-航空航天类] 08[工学] 082002[082002] 

核心收录：

D　O　I：10.1007/s11431-015-6004-z

馆 藏 号：203144324...