本文選題：鄂爾多斯盆地東緣 + 煤系沉積�。� 參考：《煤炭學(xué)報(bào)》2017年07期

【摘要】：鄂爾多斯盆地東緣是國(guó)內(nèi)煤系非常規(guī)天然氣勘探開發(fā)的重點(diǎn)地區(qū),區(qū)域范圍廣,沉積環(huán)境多變。結(jié)合野外露頭、鉆井巖芯、單井和連井剖面刻畫了研究區(qū)構(gòu)造隆降、海水進(jìn)退、多向物源影響下的層序地層格架和沉積環(huán)境演變。結(jié)果表明:在統(tǒng)一研究區(qū)典型標(biāo)志層的基礎(chǔ)上,可將太原組分為4個(gè)和山西組3個(gè)III級(jí)層序;太原組主煤層頂面是區(qū)域范圍內(nèi)的構(gòu)造轉(zhuǎn)換面,南北地勢(shì)近乎水平,之后中間地勢(shì)進(jìn)一步沉降;北部物源在太原期初始即發(fā)生影響,但南部物源到山西期才產(chǎn)生明顯影響;研究區(qū)大致以北緯38°構(gòu)造帶為南北隆降支點(diǎn),控制地層的厚度和巖性變化,影響厚煤帶的遷移;太原期的匯水中心由南部逐漸向中部過渡,即由延川南(Sq1)到大寧—吉縣(Sq2)到柳林石樓地區(qū)(Sq4),在Sq3沉積時(shí)期,海侵范圍相對(duì)最大。相關(guān)成果對(duì)認(rèn)識(shí)研究區(qū)含煤地層發(fā)育規(guī)律,開展煤系非常規(guī)天然氣勘探開發(fā)具有支撐作用。
[Abstract]:The eastern margin of Ordos Basin is a key area for the exploration and development of unconventional natural gas in coal measures in China. Combined with outcrop drilling core single well and continuous well profile the evolution of sequence stratigraphic framework and sedimentary environment under the influence of tectonic uplift drop of sea water and multi-direction provenance in the study area is described. The results show that the Taiyuan component can be divided into 4 III sequences and 3 III sequences on the basis of unifying the typical marker layers in the study area, and the top surface of the main coal seam of Taiyuan formation is the structural transformation surface in the regional scope, and the north-south topography is nearly horizontal. After that, the intermediate topography further subsidence, the northern provenance occurred at the beginning of Taiyuan period, but the southern provenance did not have obvious influence until Shanxi period, and the study area approximately took the 38 擄tectonic belt of north latitude as the fulcrum of north and south uplift, Controlling the thickness and lithologic change of strata, affecting the migration of thick coal belt, the water catchment center of Taiyuan period gradually transitioned from the south to the middle, that is, from south Yanchuan Sq1) to Daning-Ji County Sq2) to Liulin Shilou area, during the Sq3 deposition period, and the change of strata thickness and lithology affected the migration of thick coal belt. The transgression range is relatively largest. The related results can support the development of coal-bearing strata and the exploration and development of unconventional natural gas in coal-bearing measures in the study area.
【作者單位】： 中國(guó)礦業(yè)大學(xué)(北京)地球科學(xué)與測(cè)繪工程學(xué)院;中國(guó)地質(zhì)大學(xué)(北京)能源學(xué)院;
【基金】：國(guó)土資源部公益性行業(yè)科研專項(xiàng)基金資助項(xiàng)目(201311015-01) 劉寶s匱嗄昕蒲Щ鹱手钅，

本文編號(hào)：1866879