本文關(guān)鍵詞： 頁(yè)巖氣 人工裂縫 應(yīng)力敏感性 室內(nèi)實(shí)驗(yàn) 水平井　出處：《大慶石油地質(zhì)與開發(fā)》2016年03期 　論文類型：期刊論文

【摘要】：頁(yè)巖儲(chǔ)層具有低滲致密、無(wú)壓裂不產(chǎn)氣的特點(diǎn),需要大型壓裂改造產(chǎn)生易于氣體流動(dòng)的人工裂縫。為了定量化研究頁(yè)巖人工裂縫應(yīng)力敏感性,通過室內(nèi)相似物理模擬實(shí)驗(yàn),分析了人工裂縫寬度、滲透率、孔隙度隨有效應(yīng)力的變化規(guī)律。研究表明:無(wú)支撐人工裂縫初始滲透率相差不大,應(yīng)力敏感變化規(guī)律一致,巖心滲透率提高幅度隨應(yīng)力的增加迅速下降,頁(yè)巖造縫巖心應(yīng)力敏感性極強(qiáng);裂縫加入支撐劑后,初始滲透率相差較大,應(yīng)力敏感性變?nèi)?裂縫導(dǎo)流能力增加巨大;支撐劑破碎后有部分發(fā)生了彈性變形,對(duì)裂縫表面起到了較好的支撐作用。
[Abstract]:Shale reservoir has the characteristics of low permeability and compact, no fracturing and no gas production, so it is necessary for large-scale fracturing to produce artificial fractures that are easy to flow gas. In order to quantitatively study the stress sensitivity of shale artificial fractures, laboratory similar physical simulation experiments are carried out. The variation law of artificial fracture width, permeability and porosity with effective stress is analyzed. The increasing range of core permeability decreases rapidly with the increase of stress, and the stress sensitivity of shale fracturing core is very strong, the initial permeability difference is larger, the stress sensitivity becomes weaker, and the fracture conductivity increases greatly after adding proppant to the fracture. Some elastic deformation occurred after the breakage of the proppant, which played a better supporting role on the crack surface.
【作者單位】： 中國(guó)石油西南油氣田分公司勘探開發(fā)研究院;中國(guó)石油勘探開發(fā)研究院廊坊分院;中國(guó)石油西南油氣田分公司川西北氣礦;
【基金】：國(guó)家重大專項(xiàng)“長(zhǎng)寧—威遠(yuǎn)頁(yè)巖氣開發(fā)示范工程”(2016ZX05062002);國(guó)家重大專項(xiàng)“南方海相頁(yè)巖氣開采試驗(yàn)”(2011ZX05018-006)
【分類號(hào)】：TE31
，

本文編號(hào)：1510916