Notional Field Development Final Report - EBN

More documents

Recommendations

Info

EBN Notional Field Development Plan The data density or sampling per second should be set at the maximum capacity so that the gauge will hold for the entire testing period. Precautions will also be required in case the test runs longer than expected due to unexpected down times. The current test estimate of 4 days test time will require about 345,000 seconds of operations. The data density for pressure reading will be about 1 sample per second for a 400, 000 capacity quartz gauge. Surface test equipment - Standard surface testing equipment will be adequate unless CO2/H2S is expected to be present in significant amounts. There should be a local standard for this type of hazardous gas material produced to the surface. Here are some things to be considered for the surface test equipment: • As mentioned earlier, requirements for connection from down-hole to surface equipment needs to be prepared early on since it may require some manufacturing work for connectors. This is if the company providing the down-hole test is different than the one providing the surface test equipment. • An onsite H2S detector such as a Draeger tube will have to be available if H2S in the well stream fluid is a possibility. • All tests should incorporate the ESD (Emergency Shut-Down) system. The manual shutdown button should be located in a safe location away from the testing area. A typical location of ESD can be seen in the appendix. • All flow lines should be tied down or pinned. • The bubble hose or needle valve should be positioned downstream of the choke. • There should be no valve in the vent line. • Separators and surge tanks are fitted with two relief lines. • The hydrate formation should be evaluated to provide guidance on the maximum drawdown at the choke to avoid hydrate formation. • Need to confirm that the test tree can support the string weight especially when the surface and down-hole equipment are provided by different companies. • It is recommended to use the green burner with 98% efficiency or higher especially if oil or condensate is to be produced to the surface. 3.4.2.5 Special Equipment Requirements Surface readout is optional during testing; however, it is recommended to use it for the following reasons: • Confirming that the valid data is collected into the memory gauge. Pressure leaks down-hole can cause invalid pressure buildup data. • Monitor the buildup real time to allow possible early buildup termination to save unnecessary operations cost. © 2011 Halliburton All Rights Reserved 70
EBN Notional Field Development Plan Once the expected fluid type for this field has been defined, swabbing equipment is recommended to be included in the case where the oil reservoir could not flow. 3.4.3 Well Test and Fluid Sampling Design 3.4.3.1 Vertical Well Testing Gas Well Testing Flow After Flow Test Summary (The rate guidance can be seen in Figure 3-45, Predicted Test Rate above.) • Perform clean up period until debris from wellbore disappears by observing the flowing well head pressure. • Flow the well at small choke until stabilized (4-6 hrs). Stabilization can be recognized by smaller fluctuations in well head flowing pressure around 5 psig and maximum of 10 psig if 5 psig can’t be achieved. As a reference, the expected rate will be between 350 MSCFD to 4-5 MMSCFD based on the shale gas well production in the US. • Flow the second rate by opening the choke until the flowing well head pressure is reduced by at least 100-500 psig (Pwf not to exceed 25% of the AOF value)and noticeable rate (gas rate >0.3 mmcfd) difference is observed and then flow the well until stabilized (4-6 hrs). • Flow the third rate by increasing the choke again until the FTP is reduced an additional 100-500 psig with noticeable flow rate difference (> .3 mmcfd) or more and keep flowing until stabilized (4-6 hrs). Normally the draw down is defined not to exceed 25% of the AOF value and comply with the frac design. Flow After Time Estimate • Clean up period 2-8 hrs • Flow after flow 12 hrs • Build up 18 hrs • Total testing time 30-40 hrs • For smooth operations, the total time required for testing usually between 3-4 days including the operations and sampling. © 2011 Halliburton All Rights Reserved 71
Page 1 and 2:
EBN Notional Field Development Fina
Page 3 and 4:
EBN Notional Field Development Plan
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20: EBN Notional Field Development Plan
Page 69: EBN Notional Field Development Plan
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239:
show all

Notional Field Development Final Report - EBN

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?