CAJ | 학술논문

为了提高页岩气井的固井质量，在元页HF1井φ244.5mm套管固井时试验应用了滤饼固化剂。采用元页HF1井实际使用的钻井液和水泥浆，根据自主建立的固井第二界面胶结强度评价方法，评价了GJⅠ型滤饼固化剂和GJⅡ型滤饼固化剂对固井第二界面胶结强度的作用效果。评价结果表明，在分别养护3，7，15和30d的条件下，采用滤饼固化剂的固井第二界面胶结强度比常规固井第二界面胶结强度分别提高了629.03％，222.37％，241.43％和273.33％。现场固井试验后的声幅变密度测井结果表明，封固段相对声幅值≤15％的井段占全井段的93.49％，固井质量为优质。研究表明，滤饼固化剂可大幅度提高页岩气井固井第二界面胶结强度，可提高页岩气井的固井质量。
위료제고혈암기정적고정질량，재원혈HF1정φ244.5mm투관고정시시험응용료려병고화제。채용원혈HF1정실제사용적찬정액화수니장，근거자주건립적고정제이계면효결강도평개방법，평개료GJⅠ형려병고화제화GJⅡ형려병고화제대고정제이계면효결강도적작용효과。평개결과표명，재분별양호3，7，15화30d적조건하，채용려병고화제적고정제이계면효결강도비상규고정제이계면효결강도분별제고료629.03％，222.37％，241.43％화273.33％。현장고정시험후적성폭변밀도측정결과표명，봉고단상대성폭치≤15％적정단점전정단적93.49％，고정질량위우질。연구표명，려병고화제가대폭도제고혈암기정고정제이계면효결강도，가제고혈암기정적고정질량。
To improve the cementing quality of shale gas wells ,mud cake curing agent was applied in the well cementing of φ244.5 mm casing in Well Yuanye HF 1 .Based on the drilling fluid and cement slur-ry used in Well Yuanye HF 1 and API specification 10 ,the effects of mud cake curing agents (GJ Ⅰ and GJ Ⅱ) on bond strength at cement-formation interface was evaluated by the self-established evaluation method .The evaluation results showed that when the curing time was 3 ,7 ,15 and 30 days ,compared with cementing without curing agent ,the bond strength of cement-formation interface with mud cake curing a-gent remarkably increased by 629 .03% ,222.37% ,241.43% and 273.33% ,respectively .72 hours after ce-menting ,acoustic amplitude variable density logging (CBL/VDL )was carried out .The logging results showed that the proportion of cementing section with relative acoustic amplitude of less than 15% is 93 .49% ,indicating good cementing quality .The study showed that mud cake curing agent could greatly im-prove the bond strength at cement-formation interface and thus the cementing quality of shale gas wells .