{"id":18056,"date":"2022-05-06T08:00:27","date_gmt":"2022-05-06T00:00:27","guid":{"rendered":"http:\/\/learncmg.cn\/?p=18056"},"modified":"2022-05-06T08:00:27","modified_gmt":"2022-05-06T00:00:27","slug":"110-a-semi-analytical-model-for-capturing-dynamic-behavior-of-hydraulic-fractures-during-flowback-period-in-tight-oil-reservoir","status":"publish","type":"post","link":"http:\/\/learncmg.cn\/?p=18056","title":{"rendered":"110. \u4f7f\u7528\u534a\u89e3\u6790\u6a21\u578b\u63cf\u8ff0\u81f4\u5bc6\u6cb9\u85cf\u8fd4\u6392\u671f\u4eba\u5de5\u88c2\u7f1d\u52a8\u6001\u7279\u5f81"},"content":{"rendered":"
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A semi-analytical model for capturing dynamic behavior of hydraulic fractures during flowback period in tight oil reservoir<\/a><\/h3>\n
Abstract<\/span><\/strong><\/div>\n
Hydraulic fracturing has been successfully employed for unconventional oil and gas <\/span>recovery for decades. During flowback, the closure of the fracture may exhibit with <\/span>the pressure drop of fracturing fluid dewatering. However, fracture closure always is <\/span>ignored or treated as stress-dependent fracture properties in previous flowback mode<\/span>ls. <\/span><\/div>\n
<\/div>\n
This paper presented a dynamic fracture model, which can comprehensively cap<\/span>ture the dynamic behavior of hydraulic fractures during the flowback. A nonlinear <\/span>relationship between fracture aperture and contact stress acting on the fracture sur<\/span>faces is adopted to simulate fracture closure. The fracture aperture calculated by the <\/span>displacement discontinuity method (DDM) is used to characterize the fracture pore <\/span>volume and fracture conductivity, which will be dynamically updated in the flow <\/span>model. Then, the pressure and saturation of each phase, along with the displacement <\/span>on the fracture surface, are calculated by solving flow equations and geomechanics <\/span>equations with iterative coupling approach. <\/span><\/div>\n
<\/div>\n
The new semi-analytical model is vali<\/span>dated by comparing it with a fully coupled stress-porosity pressure numerical simula<\/span>tion model setup by ABAQUS<\/span>\u00ae<\/span> and CMG. Then, the dynamic behaviors of hydraulic <\/span>fractures are investigated in detail by several cases. Results show that fracture clo<\/span>sure is an important reason for the decline in production during the flowback and <\/span>early production. And it is more important to enhance the properties of the stimulated <\/span>reservoir volume (SRV) than to only create a fracture with high conductivity. Lastly, <\/span>the key parameters (the fracture effective length and fracture conductivity under varia<\/span>ble contact stress) can be interpreted by history-matching the field flowback data.<\/span><\/div>\n
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KEYWORDS: <\/span><\/strong>flowback, fracture closure, fracture dynamic behavior, semi-analytical model<\/span><\/div>\n
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A semi-analytical model for capturing dynamic behaContinue 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":[335,570],"_links":{"self":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/posts\/18056"}],"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=18056"}],"version-history":[{"count":0,"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/posts\/18056\/revisions"}],"wp:attachment":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18056"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}