# Glossary

Term | Definition |
---|---|

P10 | In a Monte Carlo simulation, a measure of the high end expectation of a particular parameter's occurrence. For example, a P10 net pay of 150 ft means that there is a 10 per cent. probability that at least 150 ft of net pay will be encountered in a given trial in the simulation. |

P50 | In a Monte Carlo simulation, the median value of a particular parameter's occurrence. For example, a P50 net pay of 50 ft means that half of the trials in the simulation encountered a value less than 50 ft. |

P90 | In a Monte Carlo simulation, a measure of the low end expectation of a particular parameter's occurrence. For example, a P90 net pay of 25 ft means that there is a 90 per cent. probability that at least 25 ft of net pay will be encountered in a given trial in the simulation. |

Permeability | A measure of the ability of liquids to flow through a porous solid. (See mD ). |

Petroleum | (See Hydrocarbons). |

PINS | Padre Island National Seashore. |

Pipeline | A pipe through which any hydrocarbon or its products is delivered to an end user. |

Porosity | The percentage of open pore space in a rock. |

POS | Probability of success (technical, as opposed to commercial). |

Potentially Recoverable Hydrocarbons | The volume of hydrocarbons that are estimated to be producible from a given trap. Used in the context of a prospect or an undeveloped hydrocarbon accumulation. |

Prospect | An undrilled or poorly understood, and therefore hypothetical, hydrocarbon trap. |

PSDM | Pre-stack depth migration. A seismic processing technique which utilizes rock velocity models to iteratively arrive at a depth converted seismic data volume. |

PSTM | Pre-stack time migration. A seismic processing technique which approximates PSDM but does not build a depth model. The seismic data volume is in two way travel time. |