本文關(guān)鍵詞：固井界面微環(huán)隙產(chǎn)生機(jī)制及計(jì)算方法　出處：《中國石油大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年05期 　論文類型：期刊論文

  更多相關(guān)文章： 井筒完整性 微環(huán)隙 仿真試驗(yàn) 理論計(jì)算 黏結(jié)力

【摘要】：針對油氣井生產(chǎn)過程中固井界面微環(huán)隙的產(chǎn)生和發(fā)展規(guī)律進(jìn)行仿真試驗(yàn)研究,并對套管-水泥環(huán)界面的黏結(jié)力進(jìn)行測量,基于以上研究建立固井界面微環(huán)隙的理論計(jì)算方法。結(jié)果表明:套管內(nèi)壓過大導(dǎo)致水泥環(huán)產(chǎn)生塑性變形,套管內(nèi)壓減小時(shí)固井界面將受拉,實(shí)測固井界面存在數(shù)量級為0.1 MPa的黏結(jié)力,當(dāng)界面拉力足以克服界面黏結(jié)力時(shí),固井界面將會(huì)脫離產(chǎn)生微環(huán)隙;套管內(nèi)壓值越大,壓力卸載后產(chǎn)生微環(huán)隙的機(jī)率越大,且微環(huán)隙尺寸越大;相同膠結(jié)質(zhì)量下固井一界面比二界面更容易產(chǎn)生微環(huán)隙;理論計(jì)算結(jié)果與仿真試驗(yàn)結(jié)果具有較好的一致性。
[Abstract]:In view of the formation and development law of cementing interface microannulus in the production process of oil and gas wells, simulation experiments were carried out, and the bond force between casing and cement annulus was measured. Based on the above research, the theoretical calculation method of cementing interface microannular gap is established. The results show that too large casing pressure leads to plastic deformation of cement ring, and the cementing interface will be pulled when casing pressure decreases. The measured cementing interface has a bonding force of 0. 1 MPa. When the interface tension is enough to overcome the interface bond force, the cementing interface will break away from the microannular gap. The greater the pressure in the casing, the greater the probability of producing microannular gap and the larger the size of the microannular gap. At the same cementing quality, the cementing interface is easier to produce microannulus than that of the two interfaces. The theoretical results are in good agreement with the simulation results.
【作者單位】： 中國石油大學(xué)石油工程學(xué)院;中國石化中原油田分公司石油工程技術(shù)研究院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51674284) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)(R1502039A,16CX06035A)
【分類號】：TE256
【正文快照】： An assessment method for occurrence of micro-annular fractureson cementing interfaces of oil and gas well casingZHAO Xiaofeng1,2,GUAN Zhichuan1,SHI Yucai1,LI Tao1,LIAO Hualin1,JIANG Jinxing1,SUN Baojiang1(1.School of Petroleum Engineering in China Univer

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