頁巖橫觀各向同性儲層水平井井周應力預測模型
發(fā)布時間:2018-05-28 11:11
本文選題:頁巖 + 水平井 ; 參考:《科學技術(shù)與工程》2017年24期
【摘要】:致密頁巖儲層進行水平井鉆井和壓裂改造時,為了精確確定頁巖氣儲層水平井的井周應力,在頁巖巖石力學特性的基礎上,建立了考慮頁巖橫觀各向同性的本構(gòu)模型和頁巖氣儲層的地應力模型,并進而建立了頁巖氣儲層水平井的井周應力模型。通過分析頁巖氣水平井井周應力的分布規(guī)律,結(jié)果表明:水平和垂直彈性模量比、地應力比和孔隙壓力對井周應力的分布有較大影響,而泊松比的影響相對比較小。該致密頁巖儲層水平井井周應力的計算方法,可為頁巖氣水平井的鉆井和壓裂改造提供理論參考和指導。
[Abstract]:In order to accurately determine the stress around the horizontal well of shale gas reservoir when drilling and fracturing in a horizontal well in tight shale reservoir, based on the mechanical properties of shale rock, The constitutive model of shale transversely isotropic and the in-situ stress model of shale gas reservoir are established, and the model of borehole stress in horizontal well of shale gas reservoir is established. The results show that the horizontal and vertical elastic modulus ratio, in-situ stress ratio and pore pressure have great influence on the distribution of borehole stress, while Poisson's ratio has little effect on the distribution of borehole stress. This method can provide theoretical reference and guidance for drilling and fracturing of shale gas horizontal wells.
【作者單位】: 中海油研究總院;
【基金】:中海石油(中國)有限公司項目(YXKY-2016-ZY-08,FQTFWQYZL-14-071,FLSFWLSYJ-15-168)資助
【分類號】:TE311
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1 于永南,帥健;橫觀各向同性地層中UPC模型與NL模型的一致性[J];石油鉆采工藝;1992年02期
2 馬景槐;考慮巖層各向異性性質(zhì)的井眼穩(wěn)定性分析[J];新疆石油學院學報;2001年01期
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