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SUMMARY:Pore pressure prediction of some selected wells\; Insight from the
  Southern Pletmos\, Bredasdorp basin\, Offshore South Africa
DTSTART;VALUE=DATE-TIME:20141002T130000Z
DTEND;VALUE=DATE-TIME:20141002T131500Z
DTSTAMP;VALUE=DATE-TIME:20261006T155238Z
UID:indico-contribution-4003@events.saip.org.za
DESCRIPTION:Speakers: Oluwatoyin Ayodele (University of the Western Cape)\
 nAn accurate prediction of pore pressure is an essential in reducing the r
 isk involved in a well or field life cycle. This has formed an integral pa
 rt of routine work for exploration\, development and exploitation team in 
 the oil and gas industries. Several factors such as sediment compaction\, 
 overburden\, lithology characteristic\, hydrocarbon pressure and capillary
  entry pressure contribute significantly to the cause of overpressure. Hen
 ce\, understanding the dynamics associated with the above factors will cer
 tainly reduce the risk involved in drilling and production. This study exa
 mined three deep water drilled wells GA-W1\, GA-N1\, and GA-AA1 of lower c
 retaceous Hauterivian to early Aptian age between 112 to 117.5 (MA) Southe
 rn Pletmos sub-basin\, Bredasdorp basin offshore South Africa. The study a
 imed to determine the pore pressure prediction of the reservoir formation 
 of the wells.  Eaton’s resistivity and Sonic method are adopted using de
 pth dependent normal compaction trendline (NCT) has been carried out for t
 his study.  The variation of the overburden gradient (OBG)\, the  Effectiv
 e stress\,  Fracture gradient (FG)\, Fracture pressure (FP)\, Pore pressur
 e gradient (PPG) and the predicted pore pressure (PPP) has been study for 
 the selected wells. The overburden change slightly as follow: 2.09g/cm3\, 
 2.23g/cm3 and 2.24g/cm3 across the selected intervals depth of wells. An a
 ccurate mud-weights of 1.98g/cm3\, 2.12g/cm3 and 2.6g/cm3 are observes for
  the wells which are within the ranges of least mud-weights constant value
  (200psi/ 0.461 g/cm3) at hydrostatic level required in drilling hole to a
 void loss of circulations or kicks.   The predicted pore pressure calculat
 ed for the intervals selected depths of wells GA-W1\, GA-N1 and GA-AA1 als
 o varies slightly down the depths as follow: 3\,405 psi\, 4\,110 psi\, 5\,
 062 psi respectively. The overpressure zone and normal pressure zone was e
 ncountered in well GA-W1\, while normal pressure zone was experienced in b
 oth well GA-N1 and GA-AA1.\n\nhttps://events.saip.org.za/event/40/contribu
 tions/4003/
LOCATION:Matjiesfontein's Lord Milner Hotel Conference Room\, Matjiesfonte
 in Station
URL:https://events.saip.org.za/event/40/contributions/4003/
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