摘要：Hydraulic fracturing is widely applied to develop tight oil reservoirs, and it is significant to diagnose fracture hit to determine optimal well spacing. Pressure test is an effective method to determine fracture hit in a multi-well system. In this study, we developed a semi-analytical model to quickly identify fracture hit in multiple vertical well system in tight oil reservoir. This semi-analytical model involves several steps, i.e., prior production step of parent wells, pressure build-up step, and interference test step. The model was verified by a numerical reservoir simulator for single well and multiple wells. Then, based on the model, the well interference by fracture hit in a three-well system (two parent wells and one child well) is discussed. Results show that the developed semi-analytical model could efficiently simulate the entire production process of a multi-well system, quickly diagnose fracture hit by using pressure interference test data and determine the optimal shut-in time of parent well. The practicability of model lies in that the reservoir pressure depletion by prior production of parent wells is considered. Besides, it is found shutting down the parent well is very necessary to diagnose fracture hit when the child well is infilled. When the shut-in parent well is connected to producing child well, the pressure build-up process of parent well is terminated with the bottom hole pressure reducing continuously. What is more, the shut-in time of parent wells should be sufficient to better detect the fracture hit, especially under the condition that parent wells have produced for a long time or the connectivity among wells is weak. This work can provide critical insights into understanding the mechanism of well interference by fracture hit in a multi-well system.
© 2020 Elsevier B.V.

ISSN号：0920-4105

卷、期、页：v 195,

发表日期：2020-12-01

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）,地学领域高质量科技期刊分级目录（国外T1）,EI（工程索引）

发表期刊名称：Journal of Petroleum Science and Engineering

参与作者：Yu, Wei,Sepehrnoori, Kamy

通讯作者：刘庆岭,王天宇

第一作者：田守嶒,李根生,盛茂

论文类型：期刊论文

论文概要：刘庆岭,田守嶒,Yu, Wei,李根生,盛茂,Sepehrnoori, Kamy,王天宇，A semi-analytical model for simulation of multiple vertical wells with well interference，Journal of Petroleum Science and Engineering，2020，v 195,

论文题目：A semi-analytical model for simulation of multiple vertical wells with well interference