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Analyse statistique des paramètres pétrophysiques des réservoirs carbonatés du Sud-Est constantinois

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Texte intégral

(1)

Bulletin du Service Géologique de

l'

Algé

rie

Vol

.

5

,

n °2

,

pp

.

167 - 187

,

14 fig

.,

1994

Analyse statistique des param è tres p étrophysiques des r é servoirs carbonat é s du Sud - Est constantinois .

Kamel BADDARI*, Mohamed DJEDDI* et Rafik BAOUCHE*

Iinstitut National deHydrocarbures

-

INH,Boumerdès35 000 Algérie

.

iumé: Dans l'exploration pétrolière, l'évaluation des fluides qui saturent lesporesdes rochesréservoirs est très

importanteetconstitue une étapecisivedans la miseen production despuits.

EnAlgérie,les problèmescaractérisant les réservoirs carbonatesson!surtout liésà l'étudedel'environnementde dépôts etl'étudedes faciès.Lesréservoirs carbonatés quisont localisésdanslarégiondu Sud

-

Est constantinois,ontfait l'objetdenombreuxtravaux,aussi biensédimcntologiqucs que faciologiqucs.

Ila étéconvenud'aborderl'étudedes caractéristiques physiqueset pétrophysiques par l'analyse en composantes principales et par l'analyse discriminante L'étudedes diagraphies dans les réservoirs carbonatés productifs et non productifs(secs)danscetterégionduSud

-

Estconstantinois (Algérie)consiste àdéterminer le lienentre la variable qualitative(productive ousèche)avecun certain nombrede variablesquantitatives,àsavoir: la radioactivité(GR),la résistivitédescouches(Rt)

.

la porosité

-

Ncutron (<j>N),le trajet sonique(Dt),l'argilosité(Vcl),ladensité(Dg),la saturation eneaudela couche(Sw)et la porositéutile ).

La discriminationdesgroupes consisteà mettreen évidence les propriétés quilesdistinguent les uns desautres.

Motsclé:Diagraphic

-

Sud

-

Estconstantinois

-

Rochescarbonatées

-

Crétacé supérieur

-

Formationturonienne.

Statistical analysis of the petrophysical parameters of South - Eastern

Constantinois carbonated reservoirs .

Abstract:Oilexplorationevaluation ofreservoirsrocksin fluid whichsaturatetheporesisveryimportant and constitutes aconclusivestageinthesettingonproductionof wells.

Theproblemswichcharacterizethecarbonatedreservoirsareabove al1in connexionwith thestudy of theenvironment of deposits and thestudy offacies.

InAlgeriathecarbonatedreservoirslocated in the South Eastern Constantinearea,form thesubjectof numerous works as well as sedimentological or faciological.

Itisagreed todeal with the petrophysicalcharacteristicsbytheanalysisinprincipal componentsand the discriminant analysisin ordertostudy thevariationsof the dataloginthe dry productiveand non productive reservoirs,in thesouth¬ eastern area andto studythelink between thequalitativevariable(productiveor dry)and acertain numberof quartdative

variables.

The discriminationof groups consists in showing up the characteristics which differenciatethemfromeachother Keywords:Diagraphy

-

South

-

EasternConstantinois

-

Carbonated rocks

-

Up

-

Cretaceous

-

Turman Formation.

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