本文選題：鄭莊區(qū)塊 + 地應(yīng)力場(chǎng)��； 參考：《煤炭科學(xué)技術(shù)》2017年10期

【摘要】：為研究地應(yīng)力對(duì)煤層氣開(kāi)發(fā)的影響,基于水壓致裂地應(yīng)力測(cè)量方法,結(jié)合煤層氣井試井、測(cè)井和水力壓裂三維微地震監(jiān)測(cè)資料,研究了鄭莊區(qū)塊16井次21層目的層段原位地應(yīng)力發(fā)育規(guī)律。結(jié)果表明:(1)地應(yīng)力場(chǎng)為典型的構(gòu)造應(yīng)力場(chǎng)類(lèi)型,淺部以逆斷層和走滑斷層應(yīng)力機(jī)制組合類(lèi)型為主,深部以正斷層和走滑斷層應(yīng)力機(jī)制組合類(lèi)型為主;(2)最大和最小水平主應(yīng)力及垂向應(yīng)力隨埋深均呈線性增加趨勢(shì);(3)側(cè)壓系數(shù)位于Hoek-Brown包絡(luò)線內(nèi),隨埋深增加而降低且變化幅度逐步縮小;(4)最大水平主應(yīng)力方位為NE-NEE向。一方面,現(xiàn)今地應(yīng)力場(chǎng)方位與斷裂構(gòu)造產(chǎn)狀的疊加影響了煤層氣富集;另一方面,地應(yīng)力增加導(dǎo)致滲透率呈指數(shù)式降低,而儲(chǔ)層壓力呈線性增加;2方面作用對(duì)煤層氣高效開(kāi)發(fā)產(chǎn)生了顯著影響。
[Abstract]:In order to study the effect of in-situ stress on coalbed methane development, based on the method of hydrofracturing, well testing, logging and hydraulic fracturing, 3D microseismic monitoring data of coalbed methane wells are combined. The in-situ stress development in the target zone of 16 wells and 21 layers in Zhengzhuang block is studied. The results show that the in-situ stress field is a typical type of tectonic stress field, and the shallow part is dominated by the combination of the stress mechanism of the reverse fault and the strike-slip fault. The maximum and minimum horizontal principal stress and vertical stress show a linear increasing trend with buried depth in depth, and the lateral pressure coefficient is located in the Hoek-Brown envelope line, which is the main type of stress mechanism combination of normal fault and strike-slip fault. The maximum horizontal principal stress azimuth is NE-NEE direction. On the one hand, the superposition of the azimuth of geostress field and the occurrence of fault structure affects the coalbed methane enrichment, on the other hand, the increase of in-situ stress results in an exponential decrease of permeability. The reservoir pressure increases linearly and has a significant effect on the high efficiency development of coalbed methane.
【作者單位】： 中國(guó)礦業(yè)大學(xué)煤層氣資源與成藏過(guò)程教育部重點(diǎn)實(shí)驗(yàn)室;中國(guó)石油華北油田公司;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(41672149) 國(guó)家科技重大專(zhuān)項(xiàng)資助項(xiàng)目(2016ZX05066001-004)
【分類(lèi)號(hào)】：P631;TE37

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