摘要
绥德地区深部煤岩气目前处于勘探初期,明晰其煤岩气成藏和富集规律对该地区深部煤岩气的高效开发意义重大.以绥德1H井8#煤为研究对象,应用有机岩石学及岩石物理学相关手段,分析并讨论其与邻区储层差异、沉积环境、孔隙结构的主控因素以及煤岩气的赋存特征.结果表明:研究区煤储层沼泽类型主要为湿地森林沼泽和开阔水域沼泽;孔隙主要以微孔为主,灰分含量是煤储层微孔的主控因素;本溪组8#煤储层含气量较高,解吸气是总含气量的主要组成部分;研究区煤储层煤质较好,含气量高,构造平缓,沉积较连续,有利于煤岩气的富集和成藏.明确绥德1H井本溪组8#煤的储层特征与成藏特征,对于深部煤储层的勘探开发具有一定的借鉴意义.
At present,the deep coalbed gas resources in the Suide area are at the early stage of exploration.Clarifying the accumulation and enrichment mechanisms of coalbed gas in this region is therefore of great significance for the efficient development of deep coalbed gas.This study focuses on the No.8 coal seam of the Benxi Formation from Well Suide 1H.Using organic petrology and rock physics approaches,the differences in reservoir properties between this well and adjacent areas,as well as the controlling factors of depositional environment,pore structure,and gas occurrence characteristics,were systematically analyzed and discussed.The results show that:(1)the coal-forming peat in the study area was mainly derived from wet-forest and open-water marshes;(2)micropores are the dominant pore type,and ash content is the primary controlling factor for micropore development in the coal reservoirs;(3)the No.8 coal seam of the Benxi Formation exhibits a relatively high gas content,with desorbed gas accounting for the major component of the total gas content;(4)the coal reservoirs in the study area are characterized by high-quality coal,high gas content,gentle structure,and continuous deposition,which together favor coalbed gas enrichment and accumulation.This study clarifies the reservoir and accumulation characteristics of the No.8 coal seam from Well Suide 1H and provides valuable insights for the exploration and development of deep coal reservoirs.
作者
刘翰林
邹才能
邓泽
赵群
周国晓
陈艳鹏
田文广
尹帅
陈朝兵
沈振
孙粉锦
Liu Hanlin;Zou Caineng;Deng Ze;Zhao Qun;Zhou Guoxiao;Chen Yanpeng;Tian Wenguang;Yin Shuai;Chen Chaobing;Shen Zhen;Sun Fenjin(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;CNPC Key Laboratory of Coal Gas,Beijing 100083,China;National Energy Shale Gas R&D(Experiment)Center,Langfang 065007,China;Research Institute of Petroleum Exploration and Development,PetroChina Changqing Oilfield Company,Xi’an 710018,China;School of Earth Sciences and Engineering,Xi’an Shiyou University,Xi’an 710065,China)
出处
《地球科学》
北大核心
2026年第1期284-302,共19页
Earth Science
基金
新型油气勘探开发国家科技重大专项(No.2025ZD1404200)
中国石油科技项目(Nos.2024DJ23,2023ZZ18)。
关键词
深部煤岩气
本溪组8#煤
孔隙结构
储层特征
石油地质学
deep coalbed methane
Benxi Formation No.8 coal
pore structure
reservoir characteristics
petroleum geology.
