[1]李澤  李皋  楊旭  王希勇  劉林  戴成.流固耦合作用下頁巖地層液相侵入機理[J].石油鉆采工藝,2018,40(6):720-725.[doi:10.13639/j.odpt.2018.06.009]
 LI Ze,LI Gao,YANG Xu,et al.Study on the invasion mechanism of liquid phase into shale formation under the effect of fluid-solid coupling[J].Oil Drilling & Production Technology,2018,40(6):720-725.[doi:10.13639/j.odpt.2018.06.009]
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流固耦合作用下頁巖地層液相侵入機理
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《石油鉆采工藝》[ISSN:1000-7393/CN:13-1072/TE]

卷:
40卷
期數:
2018年6期
頁碼:
720-725
欄目:
鉆井完井
出版日期:
2018-11-20

文章信息/Info

Title:
Study on the invasion mechanism of liquid phase into shale formation under the effect of fluid-solid coupling
文章編號:
1000 – 7393( 2018 )06 – 0720 – 06
作者:
李澤1  李皋1  楊旭1  王希勇2  劉林1  戴成1
1. 西南石油大學·油氣藏地質及開發工程國家重點實驗室;2. 中國石油化工股份有限公司西南油氣分公司
Author(s):
LI Ze1 LI Gao1 YANG Xu1 WANG Xiyong2 LIU Lin1 DAI Cheng1
1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China; 2. SINOPEC Southwest Oil & Gas Branch Company, Deyang 618000, Sichuan, China
關鍵詞:
頁巖復雜孔隙介質流固耦合液相侵入機理
Keywords:
shale complex porous medium fluid-solid coupling liquid invasion mechanism
分類號:
TE21
DOI:
10.13639/j.odpt.2018.06.009
文獻標志碼:
A
摘要:
頁巖地層液相侵入將會導致井壁失穩等井下事故的發生,但目前關于頁巖地層液相侵入及流固耦合現象研究尚不深入。建立了流固耦合作用下的頁巖地層液相侵入數學模型,并對模型求解結果進行了驗證和分析。結果表明:侵入初期,液相在人工裂縫內的滲流占據主導作用,但隨著侵入時間的延長,復雜孔隙介質內的壓力差將逐漸減弱,基質及裂縫系統內的滲流壓力將趨于一致;流固耦合作用在液相侵入過程中影響顯著,裂縫系統及基質的滲透率在流固耦合作用下增大,同時間段內耦合工況下的滲流壓力大于非耦合工況下的滲流壓力。將基質、天然裂縫、人工裂縫視為3 個不同壓力系統基礎上得到的研究結果對科學認識流固耦合作用下的頁巖地層液相侵入機理具有一定的指導意義。
Abstract:
The invasion of liquid phase into shale formation can lead to downhole accidents, e.g. borehole instability. So far, however, the invasion of liquid phase into shale formation and the fluid-solid coupling phenomenon have not been studied deeply. The mathematical model for the invasion of liquid phase into shale formation under the effect of fluid-solid coupling was established. In addition, its solution results were verified and analyzed. It is shown that in the early stage of liquid invasion, its seepage in artificial fractures is dominant. With the extension of invasion time, however, the pressure difference in complex porous medium decreases gradually, and the seepage pressure in the matrix tends to be consistent with that in the fracture system. The effect of fluid-solid coupling in the process of liquid invasion is significant, and the permeability of fracture system and matrix increases under the effect of fluid-solid coupling. And in the same time interval, the seepage pressure under the working condition of coupling is higher than that of non-coupling. In conclusion, the research results which are obtained by taking matrix, natural fracture and artificial fracture as three different pressure systems play a guiding role for understanding the invasion mechanisms of liquid phase into shale formation under the effect of fluid-solid coupling scientifically.

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