Abstract: A system and method for using orthogonally-coded active source signals for reflected signal analysis, such as in seismic exploration, sonar, and/or ultrasound applications. One method comprises inputting an orthogonally-coded active source signal to a target site, where the orthogonally-coded active source signal is sufficiently random to not interfere with a delayed version of itself. A reflected signal is received from the target site, and based at least in part on the sufficiently random orthogonal coding of the active source signal, a determination is made whether the received signal is a reflection of the input active source signal.

Abstract: A system and method for using orthogonally-coded active source signals for reflected signal analysis, such as in seismic exploration, sonar, and/or ultrasound applications. One method comprises inputting an orthogonally-coded active source signal to a target site, where the orthogonally-coded active source signal is sufficiently random to not interfere with a delayed version of itself. A reflected signal is received from the target site, and based at least in part on the sufficiently random orthogonal coding of the active source signal, a determination is made whether the received signal is a reflection of the input active source signal.

Abstract: An in situ reservoir recovery process consisting of a horizontal injection well and a horizontal production well to extract bitumen or heavy oil from a reservoir. The process consists of a first phase operated at high-pressure in which steam, hydrocarbon solvent and non-condensable gases are injected into the reservoir and a second phase in which the injected fluids are transitioned to a high content of solvent and non-condensable gas and a reduced amount of steam to maintain a warm zone in the neighbourhood of the injection and production wells. The steam injection is sufficient to promote vapor transport of the solvent into the vapor depletion chamber and maintain the process at elevated temperatures in order to maintain low fluid viscosities in the production wellbore and to achieve preferred phase behaviour of the solvent hydrocarbon and the heavy oil or bitumen.

Abstract: A process is described for in situ recovery of bitumen or heavy oil from a reservoir having a horizontal injection well and a horizontal production well. The process includes a first phase in which steam and a heavy hydrocarbon solvent are injected into the reservoir, a second phase in which the steam and heavy hydrocarbon injections are transitioned to a light hydrocarbon solvent injection, and a third phase in which a light hydrocarbon solvent is injected without further steam or heavy hydrocarbon injection. A displacement gas may be added during any of the phases, and production of hydrocarbons continues throughout all phases. The process allows maximal economic benefit by employing a high-production start-up phase, followed by lower cost phases which progress a depletion chamber within the reservoir to achieve high levels of reservoir fluid recovery.