Peak Gas Rate Forecast of Wells with DHC in Tight Sandstone Gas Reservoir

Abstract

As the largest gas production unit and the key of the West–East natural gas transmission project, these years Changqing gas field is facing greater challenges and difficulties for the sharp increase of the gas consumption. Especially, every winter when peaking gas supply is needed, selected wells have to tap their potential to meet the requirement. The typical tight sandstone gas reservoir Sulige gas field plays a crucial role in the peak gas supply in winter. For the use of the down hole choke (DHC), the device should be removed before the wellhead heating equipment is installed. Due to the severe heterogeneity and huge difference in production, it is vital to select wells and predict their behavior at first. A rapid gas rate forecasting method for wells with DHC is introduced in this article by contrasting the gas rate and the casing pressure drop rate around the peak gas supply period for wells with long production history, and by analyzing the relationship between AOF and proration of newly developed wells. Field application in S1 block of Sulige gas field shows this method yields high accuracy and meets field’s requirement.

Copyright 2017, Shaanxi Petroleum Society.

This paper was prepared for presentation at the 2017 International Field Exploration and Development Conference in Chengdu, China, 21–22 September 2017.

This paper was selected for presentation by the IFEDC&IPPTC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC&IPPTC Committee and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC&IPPTC Committee, its members. Papers presented at the Conference are subject to publication review by Professional Committee of Petroleum Engineering of Shaanxi Petroleum Society. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of Shaanxi Petroleum Society is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC&IPPTC. Contact email: paper@ifedc.org or paper@ipptc.org.