{"id":56751,"date":"2022-10-27T06:00:07","date_gmt":"2022-10-26T22:00:07","guid":{"rendered":"http:\/\/learncmg.cn\/?p=56751"},"modified":"2022-10-27T06:00:07","modified_gmt":"2022-10-26T22:00:07","slug":"187%ef%bc%9a%e8%87%b4%e5%af%86%e6%b0%94-%e9%a1%b5%e5%b2%a9%e6%b2%b9%e5%9c%b0%e5%b1%82%e4%b8%ad%e5%a4%9a%e8%a3%82%e7%bc%9d%e6%b0%b4%e5%b9%b3%e4%ba%95%e7%9a%84%e5%9c%b0%e5%b1%82%e4%bc%a4%e5%ae%b3","status":"publish","type":"post","link":"http:\/\/learncmg.cn\/?p=56751","title":{"rendered":"187. \u81f4\u5bc6\u6c14\/\u9875\u5ca9\u6cb9\u85cf\u591a\u88c2\u7f1d\u6c34\u5e73\u4e95\u7684\u5730\u5c42\u4f24\u5bb3\u6a21\u62df"},"content":{"rendered":"<h3 style=\"text-align: center;\"><a href=\"https:\/\/link.springer.com\/article\/10.1007\/s13202-022-01544-8\">Formation damage simulation of a multi-fractured horizontal well in a tight gas\/shale oil formation<\/a><\/h3>\n<h5>\u94bb\u4e95\u8fc7\u7a0b\u4e2d\u7684\u5730\u5c42\u635f\u5bb3\u662f\u7531\u4e8e\u4e95\u7b52\u548c\u5730\u5c42\u4e4b\u95f4\u7684\u9ad8\u538b\u5dee\u94bb\u4e95\u6db2\u4fb5\u5165\u9020\u6210\u7684\u3002\u8fd9\u79cd\u673a\u7406\u53d1\u751f\u5728\u81f4\u5bc6\u5730\u5c42\u4e2d\u591a\u88c2\u7f1d\u6c34\u5e73\u4e95\u7684\u538b\u88c2\u6db2\u4fb5\u5165\u4e2d\u3002\u4e00\u4e9b\u591a\u88c2\u7f1d\u4e95\u7684\u4ea7\u91cf\u548c\u7d2f\u79ef\u4ea7\u91cf\u8fdc\u4f4e\u4e8e\u9884\u671f\u3002\u8fd9\u4e9b\u53d7\u4f24\u5bb3\u7684\u6cb9\u4e95\u53ef\u80fd\u4f1a\u6bd4\u9884\u671f\u66f4\u4f4e\uff0c\u4f8b\u5982\u7531\u4e8e\u65b0\u51a0\u80ba\u708e\u75ab\u60c5\u7b49\u610f\u5916\u4e8b\u4ef6\u800c\u5173\u95ed\u6cb9\u4e95\uff0c\u7d2f\u79ef\u4ea7\u91cf\u4f1a\u8fdb\u4e00\u6b65\u51cf\u5c11\u3002<\/h5>\n<h5>\u672c\u6587\u91cd\u70b9\u5206\u6790\u4e86\u88c2\u7f1d\u5730\u5c42\u635f\u5bb3\u7684\u6839\u672c\u539f\u56e0\uff0c\u5e76\u63d0\u51fa\u4e86\u63d0\u9ad8\u4ea7\u91cf\u7684\u53ef\u80fd\u89e3\u51b3\u65b9\u6848\u3002\u4f7f\u7528Computer Modeling Group \uff08CMG\uff09\u8f6f\u4ef6\u8fdb\u884c\u4e86\u6a21\u62df\u7814\u7a76\uff0c\u6a21\u62df\u538b\u88c2\u6db2\u4fb5\u5165\u548c\u5173\u4e95\u9020\u6210\u7684\u5730\u5c42\u635f\u5bb3\u3002<\/h5>\n<h5>\u6a21\u62df\u7ed3\u679c\u8868\u660e\uff0c\u4e0d\u540c\u6761\u4ef6\u4e0b\u7684\u4e95\u7684\u6f0f\u5931\u548c\u5173\u4e95\uff0c\u9020\u6210\u7d2f\u79ef\u6cb9\u6c14\u4ea7\u91cf\u7684\u51cf\u5c1120%\u81f341%\u3002\u4e3b\u8981\u539f\u56e0\u662f\u81f4\u5bc6\u5730\u5c42\u4e34\u754c\u542b\u6c34\u9971\u548c\u5ea6\u9ad8\u3001\u538b\u964d\u4f4e\u3001\u5730\u5c42\u95ed\u5408\u5e94\u529b\u4e0b\u652f\u6491\u5242\u88c2\u7f1d\u6b8b\u4f59\u6e17\u900f\u7387\u4f4e\u3002\u91c7\u7528\u654f\u611f\u6027\u5206\u6790\u63d0\u51fa\u4e86\u4e24\u79cd\u51cf\u8f7b\u5730\u5c42\u635f\u5bb3\u7684\u53ef\u884c\u89e3\u51b3\u65b9\u6848\uff1a\u4f18\u5316\u751f\u4ea7\u8fc7\u7a0b\u4e2d\u7684\u538b\u964d\u548c\u6c34\u529b\u538b\u88c2\u8fc7\u7a0b\u4e2d\u7684\u652f\u6491\u5242\u5145\u586b\u6e17\u900f\u7387\u3002\u4f18\u5316\u538b\u964d\u53ef\u4ee5\u6709\u6548\u4fee\u590d\u6f0f\u5931\u4f24\u5bb3\uff0c\u4f46\u4e0d\u80fd\u51cf\u8f7b\u5173\u4e95\u4f24\u5bb3\u3002\u5e94\u901a\u8fc7\u4f7f\u7528\u9002\u5f53\u7684\u652f\u6491\u5242\u6e17\u900f\u7387\uff0c\u63d0\u524d\u9884\u9632\u5173\u4e95\u9020\u6210\u7684\u5730\u5c42\u4f24\u5bb3\u3002\u8fd9\u4e9b\u5173\u952e\u53d1\u73b0\u63d0\u9ad8\u4e86\u4ea7\u80fd\uff0c\u6539\u5584\u4e86\u81f4\u5bc6\u6c14\u548c\u9875\u5ca9\u6cb9\u5730\u5c42\u7684\u7ecf\u6d4e\u6027\u3002<\/h5>\n<h5>New Mexico Tech \u65b0\u58a8\u897f\u54e5\u77ff\u4e1a\u53ca\u79d1\u6280\u5b66\u9662<\/h5>\n<h2>Abstract<\/h2>\n<p>Formation damage in drilling comes from drilling fluid invasion due to high differential pressure between a wellbore and the formation. This mechanism happens with fracture fluid invasion of multi-fractured horizontal wells in tight formations. Some multi-fractured wells show production rates and cumulative productions far lower than expected. Those damaged wells may sustain further impact such as well shutting due to unexpected events such as the COVID-19 outbreak and then experience a further reduction in cumulative production. This paper focuses on the root causes of formation damage of fractured wells and provides possible solutions to improve production. A simulation study was conducted using Computer Modelling Group software to simulate formation damage due to fracture fluid invasion and well shut-in. Simulation results revealed that the decrease in cumulative hydrocarbon production due to leak-off and shut-in of the simulated well could range from 20 to 41%, depending on different conditions. The results showed that the main causes are high critical water saturation of tight formations, low drawdown, and low residual proppant permeability under formation closure stress. The sensitivity analysis suggests two feasible solutions to mitigate formation damage: optimizing drawdown during production and optimized proppant pack permeability of the hydraulic fracturing process. Optimizing pressure drawdown is effective in fixing leak-off damage, but it does not mitigate shut-in damage. Formation damage due to shut-in should be prevented in advance by using an appropriate proppant permeability. These key findings enhance productivity and improve the economics of tight gas and shale oil formations.<br \/>\nThe removal of water saturation depends on the following factors:<\/p>\n<ul>\n<li>The available drawdown in the production phase: High drawdown will shorten the clean-up period and thus mitigate production impairment.<\/li>\n<li>Residual proppant permeability: critical factor to accelerate the removal of blocking fracture fluid. A high proppant conductivity provides a better clean-up.<\/li>\n<li>The difference between\u00a0<em>S<\/em><sub>wi<\/sub>\u00a0and\u00a0<em>S<\/em><sub>wcrit<\/sub>: In a tight formation which has a significant difference between\u00a0<em>S<\/em><sub>wi<\/sub>\u00a0and\u00a0<em>S<\/em><sub>wcrit<\/sub>, the best practice of minimizing formation damage is to keep altered water saturation below\u00a0<em>S<\/em><sub>wcrit<\/sub>\u00a0as much as possible.<\/li>\n<\/ul>\n<p><img class=\"wp-image-56752\" src=\"http:\/\/learncmg.cn\/wp-content\/uploads\/2022\/10\/unnamed-file-71.png\" alt=\"\u56fe\u8868, \u6563\u70b9\u56fe\n\u63cf\u8ff0\u5df2\u81ea\u52a8\u751f\u6210\" \/><\/p>\n<h4 style=\"text-align: center;\"><img class=\"wp-image-56753\" src=\"http:\/\/learncmg.cn\/wp-content\/uploads\/2022\/10\/fig-4.png\" alt=\"Fig. 4\" \/> Modified of Barton\u2013Bandis fracture permeability model<\/h4>\n<p><img class=\"wp-image-56754\" src=\"http:\/\/learncmg.cn\/wp-content\/uploads\/2022\/10\/unnamed-file-72.png\" alt=\"\u6587\u672c\n\u63cf\u8ff0\u5df2\u81ea\u52a8\u751f\u6210\" \/><br \/>\n<img class=\"wp-image-56755\" src=\"http:\/\/learncmg.cn\/wp-content\/uploads\/2022\/10\/fig-26.png\" alt=\"Fig. 26\" \/><\/p>\n<h4 style=\"text-align: center;\">Water saturation alter in fractured zones<\/h4>\n","protected":false},"excerpt":{"rendered":"<p>Formation damage simulation of a multi-fractured h<span class=\"more-link\"><a href=\"http:\/\/learncmg.cn\/?p=56751\">Continue Reading<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[159],"tags":[393,55],"_links":{"self":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/posts\/56751"}],"collection":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=56751"}],"version-history":[{"count":0,"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/posts\/56751\/revisions"}],"wp:attachment":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=56751"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=56751"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=56751"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}