Abstract
Well logs data from four wells were analysed for determining the petrophysical and geomechanical properties of two reservoirs in the study area. The parameters derived from these properties were used to predict the likelihood of the occurrence of sanding in the reservoirs of interest. Five sand production methods were used in predicting sanding in the reservoirs of interest. The results obtained from these sand prediction methods all showed that the reservoirs were not likely to produce sanding during drilling exploration and production. Reservoir geomechanical study has a significant role that cannot be neglected in the development of various hydrocarbon exploitation procedures, such as in the exploration and production, drilling and field development phase. The role of geomechanical properties have great impact on the drill bit selection, optimization of well trajectory placement, casing design, wellbore stability analysis, safe mud weight window (SMWW) prediction and sand production. Sand production is a serious problem widely existing in oil/gas production. The problems resulting from sand influx include abrasion of downhole tubular/casing, subsurface safety valve and surface equipment, casing/tubing buckling, failure of casing or liners from removal of surrounding formation, compaction and erosion; and loss of production caused by sand bridging in tubing and/or flow lines.
Highlights
In the oil industry, the drilling of hydrocarbon is capital intensive, as such Geologist and Geophysicists are always on their toes to interpret seismic data so as to ascertain the actual depth these pools of hydrocarbon lie on the subsurface
OWO 11 and OWO 10 are good enough to carry out sand prediction, this is because they have good sonic readings
Indicating that the reservoirs are not likely to produce sands during drilling. Researchers such as Ehsan and Ebrahim, 2015, used G/Cb to estimate sanding in their studies, the values they calculated were higher than the threshold values for sanding, indicating that their reservoirs did not produce sand
Summary
The drilling of hydrocarbon is capital intensive, as such Geologist and Geophysicists are always on their toes to interpret seismic data so as to ascertain the actual depth these pools of hydrocarbon lie on the subsurface. Pending on the strength of the formation, the drilling phase can be fast or slow. Comes the well completions and production stage. The production of hydrocarbon most often comes with challenges pending on the compaction or strength of the reservoir. When hydrocarbon is being produced from a weak or uncompacted reservoir (an unconsolidated reservoir or a young reservoir), sand particles are always produced along with the hydrocarbon. These sand particles always have negative effects on the equipment used in the production of hydrocarbon, be it Expandable Sand Screen (ESS) or Perforated Liners
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