Identification of Interwell Interference Based on Hydrogeochemical Characteristics of Produced Water from Coalbed Methane Wells: A Case Study in the Southern Qinshui Basin, China

被引：0
|
作者：
Tu, Mingkai [1 ]
Wang, Xiaoming [1 ]
Hou, Shihui [2 ]
Chen, Wenwen [1 ]
Dang, Zheng [1 ]
机构：
[1] China Univ Geosci, Key Lab Tecton & Petr Resources, Wuhan, Peoples R China
[2] Jinggangshan Univ, Lab Geotech Engn, Jian, Peoples R China
来源：
SPE JOURNAL | 2024年 / 29卷 / 07期
基金：
中国国家自然科学基金;
关键词：
CO-PRODUCED WATER; ISOTOPIC COMPOSITION; TRACE-ELEMENTS; HYDROCHEMICAL CHARACTERISTICS; GEOCHEMICAL CHARACTERISTICS; GEOLOGICAL CONTROLS; SHIZHUANGNAN BLOCK; PREDICTION MODEL; COPRODUCED WATER; UNITED-STATES;
D O I：
10.2118/219759-PA
中图分类号：
TE [石油、天然气工业];
学科分类号：
0820 ;
摘要：
Interwell interference is the superposition effect of coalbed methane (CBM) reservoir pressure. This study aims to provide a new direction for the quantitative analysis of interwell interference from the hydrogeochemical characteristics of produced water from CBM wells. A total of 24 produced water samples collected from the Panhe (PH) group, Shizhuangnan (SZN)-1 group, and SZN-2 group in Qinshui Basin were selected for the comparative analysis. The water type of all water samples is characterized by Na-HCO3, with Na+ being the main total dissolved solids (TDS) provider. The self-similar major ionic characteristics of the PH and SZN-2 groups are prone to the occurrence of interwell interference. The delta D and delta O-18 show that the main source of produced water is atmospheric circulating water. The similar isotope characteristics of produced water in the PH and SZN-2 groups represent that there is remarkable interwell interference. Sr, As, Cu, Ga, Li, Rb, Sn, Mo, and V are selected as indicator elements. In the cluster analysis, all CBM wells form a single cluster in the PH and SZN-2 groups in the first three iterations, indicating interwell interference. According to the established fuzzy discriminative model, interwell interference is divided into two types-strong interwell interference and weak interwell interference. Most CBM wells in the PH and SZN-2 groups show strong interwell interference. This study can provide theoretical foundations for the dynamic pressure regulation and well pattern infilling of CBM wells.
引用
收藏
页码：3584 / 3600
页数：17
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