基于地震沉積學(xué)方法的煤層厚度預(yù)測
發(fā)布時間:2018-01-29 02:20
本文關(guān)鍵詞: 地震沉積學(xué) 地層切片 巖性識別 沉積相 煤厚預(yù)測 出處:《中國煤炭》2017年03期 論文類型:期刊論文
【摘要】:為獲得中裕地區(qū)的精細(xì)煤厚資料,基于相控沉積理論,借助地震沉積學(xué)在地層巖性識別及沉積相帶劃分等方面的優(yōu)勢,提出利用地震沉積學(xué)方法預(yù)測煤厚的思路。通過對研究區(qū)山西組2~#煤層聚煤前后沉積相帶分布及其演化與煤厚相關(guān)性分析,實(shí)現(xiàn)對2~#煤層厚度的預(yù)測。結(jié)果表明:研究區(qū)2~#煤層聚煤前為下三角洲沉積環(huán)境,聚煤后為上三角洲沉積環(huán)境。后期構(gòu)造及聚煤后沉積環(huán)境對煤厚變化影響較小,而聚煤前沉積環(huán)境及其相帶分布對煤厚變化起控制作用。煤厚預(yù)測結(jié)果與鉆孔揭露吻合較好,最大絕對誤差厚度為0.24 m,最大相對誤差為9.19%,精度相對較高,證實(shí)了該方法的可行性。
[Abstract]:In order to obtain fine coal thickness data in Zhongyu area, based on facies controlled sedimentary theory, the advantages of seismic sedimentology in stratigraphic lithology identification and sedimentary facies zone division are obtained. This paper puts forward the idea of predicting coal thickness by seismic sedimentology, and analyzes the correlation between the distribution of sedimentary facies and the evolution of sedimentary facies and coal thickness before and after coal accumulation in Shanxi formation 2# coal seam in the study area. The results show that the lower delta sedimentary environment is prior to the coal accumulation in the 2 # coal seam in the study area. The later structure and sedimentary environment after coal accumulation have little influence on the change of coal thickness. The sedimentary environment and the distribution of facies belt before coal accumulation control the change of coal thickness. The prediction results of coal thickness are in good agreement with drilling exposure. The maximum absolute error thickness is 0. 24m and the maximum relative error is 9.19%. The accuracy is relatively high, which proves the feasibility of the method.
【作者單位】: 太原理工大學(xué)礦業(yè)工程學(xué)院;煤與煤系氣地質(zhì)山西省重點(diǎn)實(shí)驗(yàn)室;山西山地物探技術(shù)有限公司;
【基金】:山西省煤基重點(diǎn)科技攻關(guān)資助(MQ201401)
【分類號】:P631.4;P618.1
【正文快照】: 煤儲層既是煤層氣的源巖,又是煤層氣的儲 形態(tài)進(jìn)行精確預(yù)測具有重要意義。煤層屬于薄層,層,是影響煤層氣賦存的一個關(guān)鍵因素,其重要性 而薄層的定量預(yù)測一直是業(yè)界公認(rèn)的難題之一。不言而喻,因此對煤儲層的厚度變化及其空間展布 20世紀(jì)80年代,我國煤田地質(zhì)人員主要根據(jù) 威得
【參考文獻(xiàn)】
相關(guān)期刊論文 前7條
1 邱占林;馮金煒;寇貴存;羅保榮;周維貴;黃聰明;陳萬煌;;東坑仔礦區(qū)地質(zhì)構(gòu)造對煤層的影響[J];中國煤炭;2016年08期
2 高世臣;袁照威;;地震屬性在沉積相預(yù)測中的方法研究—序貫隨機(jī)模式識別[J];地球物理學(xué)進(jìn)展;2016年03期
3 介偉;;煤田小構(gòu)造精細(xì)解釋方法研究及應(yīng)用[J];中國煤炭;2015年01期
4 楊帥;陳洪德;侯明才;徐勝林;郭W,
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