Prospectus re Admission to the Official List - Heritage Oil

RPS EnergyHeritage Oil – Competent Persons Report4.4. Petroleum Engineering4.4.1. Reservoir Fluid PropertiesThe Lower J 1 Sand contains an undersaturated oil at an initial pressure and temperature of approximately28 MPa (4,018 psia) and 83 C (181 F), respectively, at a depth of 2,750 m. The produced oil has a densityof 834 kg m -3 (~38 API). The in-situ viscosity of the oil is likely to be 2-3 times that of water, and thebubble point of the reservoir oil is 1,320 psia (the implication of these factors is discussed below). Theinitial solution GOR (R si ) is 410 scf/stb, and the initial formation volume factor (B oi ) is 1.25 rb/stb.4.4.2. Well Performance & DeliverabilityTwo wells have been tested and produced on the acreage, namely 226 and P3. Their production history isshown in Figure 16 and Figure 17 below. The highest rate achieved by each well is 476.5 stb/d and288.9 stb/d, respectively.Figure 16:Well 226 Production History27FEB20080426380698