Acid Fracturing: New Insigths On Acid Etching Patterns From Experimental Investigation

dc.creatorNeumann L.F.
dc.creatorDe Oliveira E Sousa J.L.A.
dc.creatorBrandao E.M.
dc.creatorOliveira T.J.L.
dc.date2012
dc.date2015-06-25T20:27:20Z
dc.date2015-11-26T15:23:52Z
dc.date2015-06-25T20:27:20Z
dc.date2015-11-26T15:23:52Z
dc.date.accessioned2018-03-28T22:32:45Z
dc.date.available2018-03-28T22:32:45Z
dc.identifier9781618396105
dc.identifierSociety Of Petroleum Engineers - Spe Hydraulic Fracturing Technology Conference 2012. , v. , n. , p. 422 - 430, 2012.
dc.identifier
dc.identifier
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84861603097&partnerID=40&md5=913cdcea1571e73b8e02826b234330e3
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/90724
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/90724
dc.identifier2-s2.0-84861603097
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1260552
dc.descriptionNowadays, it is commonplace to say that acid fracture conductivity depends on the fracture face asperities. Does it really depend on it? Almost thirty years ago, someone wrote, "We believe the conductivity measured in these tests is mainly due to the smoothing of peaks and valleys on the rough fracture faces, and is independent of rock heterogeneities due to the small sample size." Moreover, almost one year ago, one wrote, "More asperities touch and deform as the closure stress increases. The channels become even shorter and fewer openings are left." Between these two extremes, the asperities came to be pointed out as an essential factor to generate acid conductivity. Many published results from small, wet sawed and leveled carbonate rock samples support such claim. We did the same. Our experimental investigation on small scale carbonate samples with sawn faces, both from outcrops and well cores, reconfirm the existence of three main acid patterns namely uniform, channels and roughness. The design of experimental apparatus prevented that those etching patterns were artifact patterns. The acid etching patterns determine different conductivity behavior under confining stress. However, hydraulic fractures are tensile fractures and they are naturally rough. In nature, there is no such thing as a leveled fracture face. Tensile fracture faces could be rougher than fracture face after acid reaction. In fact, the first experimental results show that after acid reaction, linear roughness of tensile fractures can be larger, equal or less than linear roughness before acid reaction. This paper presents experimental results and discusses the asperities paradigm. Copyright 2012, Society of Petroleum Engineers.
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dc.description422
dc.description430
dc.descriptionSchlumberger,Coiled Tubing and Fracturing Energy Services, Inc.,Baker Hughes,Dorf Ketal,Mission Well Services
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dc.languageen
dc.publisher
dc.relationSociety of Petroleum Engineers - SPE Hydraulic Fracturing Technology Conference 2012
dc.rightsfechado
dc.sourceScopus
dc.titleAcid Fracturing: New Insigths On Acid Etching Patterns From Experimental Investigation
dc.typeActas de congresos


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