摘要
以苏里格气田东区为例,采用Arps分析方法计算产量递减,详细解释了指数、双曲和调和3种产能递减方式。研究认为,苏里格气田东区低产、低渗、低丰度,气井压降快,稳产期短或无稳产期,Arps分析结果为双曲递减;递减率受初期配产影响大,可通过调整初期配产来控制递减率;研究区2008年投产井平均在2 a后进入递减期,月递减率为1.7%-2.4%;苏里格气田东区Ⅰ类井、Ⅱ类井和Ⅲ类井配产都在合理范围之内,分析方法准确可靠。依据衰竭式递减公式,研究区已投产井的有效开采时间为15-30a.
Taking the east area of Sulige gas field in Ordos basin as an example, the Arps decline curves were used to calculate the produc-tion decline and explain the processes of exponential, hyperbolic and harmonic decline curves in detail in this area. The studies suggestthat the east area of Sulige gas field is characterized by low yield, low permeability, low abundance, rapid decline of pressure drop in gaswells, short or no for stable production period, so its decline belongs to hyperbolic decline; the decline rate is greatly influenced and con-trolled by initial production allocation; the production wells in 2008 in this area entered into decline period in two years later in average,with month decline rate of 1.7%-2.4%. the proration of ClassⅠ, Ⅱ, Ⅲ wells in this area of Sulige gas field are all in the reasonable rang-es, indicating this analytical method is accurate and reliable. According to the formula for depletion decline, the net production time is pre-dicted as 15-30 years for the producing wells in this area.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2015年第1期82-85,共4页
Xinjiang Petroleum Geology
基金
国家自然科学基金(41402120)
