[1]萬浩東 楊遠光.儲氣庫井彈性自愈合水泥漿體系及其性能評價[J].石油鉆采工藝,2018,40(6):730-735.[doi:10.13639/j.odpt.2018.06.011]
 WANG Haodong,YANG Yuanguang.Elastic self-healing slurry system used for gas storage wells and its property evaluation[J].Oil Drilling & Production Technology,2018,40(6):730-735.[doi:10.13639/j.odpt.2018.06.011]
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儲氣庫井彈性自愈合水泥漿體系及其性能評價
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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:
730-735
欄目:
鉆井完井
出版日期:
2018-11-20

文章信息/Info

Title:
Elastic self-healing slurry system used for gas storage wells and its property evaluation
文章編號:
1000 – 7393( 2018 )06 – 0730 – 06
作者:
萬浩東 楊遠光
西南石油大學油氣藏地質及開發工程國家重點實驗室
Author(s):
WANG Haodong YANG Yuanguang
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China
關鍵詞:
密封完整性自愈合評價方法彈性自愈合水泥漿固井儲氣庫
Keywords:
sealing integrity self-healing evaluation method elastic self-healing slurry well cementing gas storage
分類號:
TE256.7
DOI:
10.13639/j.odpt.2018.06.011
文獻標志碼:
A
摘要:
由于儲氣庫存在季節性調峰需求,其工作時井筒水泥石會受到交變載荷作用,導致密封完整性易被破壞。針對這一問題,優選了自愈合評價方法,研究選擇了一種結晶型自愈合劑(JHR-1),分析了其自修復原理并以其為主體,在優選復配纖維JX46-12、丁苯膠乳PLT-100 及其他外加劑的基礎上,形成了密度1.89 g/cm3 的彈性自愈合水泥漿體系,并對其性能進行了評價。結果表明,在養護14 d 后其裂縫最大愈合寬度超過150 μm,28 d 后超過250 μm;7 d 壓折比與抗沖擊韌性分別為4.52、3.87 J/cm2, 韌性較好,7 d 膠結強度達到6.76 MPa;彈性模量僅5 018 MPa,彈性極限應力與應變分別為39 MPa、0.67%,彈性表現好;循環應力加載第5 周彈性恢復率達50% 以上,彈性恢復性能好,水泥石疲勞強度高。在儲氣庫井口壓力為13~39 MPa 條件下可保持水泥石完整性,在載荷超過了水泥石彈性極限應力產生了微裂縫情況下也能快速修復裂縫。
Abstract:
One role of gas storage is seasonal peak shaving. And during its operation, the set cement in the wellbore undergoes the alternating loads, and its sealing integrity tends to be damaged easily. To solve this problem, the self-healing evaluation method was selected. Then, a kind of crystalline self-healing agent (JHR-1) was researched and selected, and its self-repairing principle was analyzed. After combination fiber (JX46-12), styrene butadiene latex (PLT-100) and other additives were optimized, the elastic self-healing slurry system with the density of 1.89 g/cm3 was developed with the crystalline self-healing agent (JHR-1) as the main part. Finally, its properties were evaluated. It is indicated that its maximum crack healing width is over 150 μm after 14 days’ maintenance and over 250 μm after 28 days’ maintenance. The ratio of compressive strength to flexural strength and the anti-impact toughness after 7 days’ maintenance are 4.52 and 3.87 J/cm2, respectively, indicating better toughness. The cementing strength after 7 days’ maintenance is 6.76 MPa. The elastic modulus is only 5 018 MPa, and the elastic limit stress and strain are 39 MPa and 0.67%, respectively, indicating good elasticity. After cyclic stress is loaded by 5 weeks, the elastic recovery rate is over 50%, which indicates that its elastic recovery capacity is good and the fatigue strength of set cement is high. When the wellhead pressure of gas storage well is in the range of 13-39 MPa, the set cement can be remained integral. And if micro-cracks are generated when the load is higher than the elastic limit stress of set cement, they can be healed quickly.
更新日期/Last Update: 2019-04-10
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