Abstract:
Methods and systems produce petroleum products by steam assisted gravity drainage with dual producers separated vertically and laterally from at least one injector. Placement of the producers limits temperature rise of draining fluids and hence reflux of non-condensable gases injected with steam. In particular, the fluids drain along a steam chamber boundary for recovery at positions that are not in a direct downward path from where the injector is introducing heat.
Abstract:
The invention is an electric sweep type seismic vibrator source of the type used in seismic prospecting for hydrocarbons. The source uses an engine and generator combination to create electric power for all systems on the source such as driving a frame of linear electric motors that direct a rod or piston to contact the ground in a recurring fashion along with driving the source from location to location through a survey area. Preferably a foot is arranged on the bottom end of the rod or piston for contact with the ground and by engaging the grid of motors to push down against the ground to create impulses that deliver acoustic seismic energy into the earth for geophones to sense and record. However, the pulses of seismic energy are delivered in a distinctive fashion where different linear motors are deliberately and concurrently providing different signals that create a distinctive composite signature or signal that can be identified in the data record for source separation purpose.
Abstract:
The invention is an electric seismic vibrator source of the type used in seismic prospecting for hydrocarbons that creates a quasi-impulsive burst of seismic energy onto the ground and into the earth. The source uses an engine and generator combination to create electric power for all systems on the source such as driving a frame of linear electric motors that direct a rod or piston to contact the ground. All of the linear electric motors are driven against the ground in a high power pulse that delivers a band-limited spectrum of seismic energy over a very brief period of time that would like a “pop” and be measured in milliseconds. A quasi-impulsive seismic pulse would create a wave field that resembles the seismic data acquired using dynamite or other explosive seismic systems without the ultrahigh frequencies of a true explosive pulse. The quick burst or several quick bursts may further speed up the survey by minimizing the time that a vibe spends on a source point.
Abstract:
The present invention provides a riser protection structure being suitable to be employed in a Jackup rig. The riser protection structure comprises a plurality of piles, an upper module, wherein the upper module comprises a main protection tubing for receiving a riser, a plurality of sleeves to be installed over the plurality of piles, and a connecting network; wherein the plurality of sleeves are disposed around the main protection tubing; and wherein the main protection tubing and the plurality of sleeves are connected together by the connecting network, and a lower module, wherein the lower module comprises a plurality of tubular guides for guiding and later fixing the piles and a connecting structure, wherein the plurality of piles are securely disposed into the seabed for providing the requisite support for the upper and lower modules when they are assembled.
Abstract:
A method of drilling a first well and a second well into the reservoir includes forming a conduit between the first well and the second well. The conduit is filled with a conduit material. Finally, a low viscosity fluid is injected into the conduit to establish fluid communication between the first well and the second well.
Abstract:
The illumination/imaging of a theorized target horizon that is below a theorized velocity contrast horizon where the velocity contrast horizon may represent the bottom of a salt dome by assessing the path of seismic energy for critical angle reflection/refraction and tabulates the successful paths and unsuccessful paths. For some subsurface locations, seismic energy will not reach the surface above the velocity contrast due to the shapes of the velocity contrast horizon and target horizon and the velocity model through which the studied waves propagate. Displays may be prepared and used for understanding illumination/imaging of the geology for drilling, reacquisition, and reprocessing to elicit information about subsurface geology that may have been overlooked or ignored. Future surveys avoid expensive surveying which cannot obtain useful seismic data as determined by the velocity contrast for the target locations due to the shapes of the horizons and the velocity model.
Abstract:
Methods and apparatuses for reducing the effects of motion in a core-in-shell type heat exchanger are provided. One apparatus includes: (a) a heat exchanger, wherein the heat exchanger includes an internal volume defined within a shell and a plurality of spaced apart cores disposed within the internal volume of the shell, wherein the internal volume is flooded with a vaporizing fluid; and (b) a separation vessel connected to the heat exchanger, wherein the separation vessel is located at higher elevation than the heat exchanger, wherein the separation vessel is connected to the heat exchanger in such a manner so as to deliver a hot feed stream to heat exchanger and the receive a non-vaporizing stream from the heat exchanger.
Abstract:
This invention relates to a process for isolating one or more segments of a gravel packed well from other segments to treat the isolated segments and easily re-establish flow from the other segments after the treatment. The treatment includes techniques for enhancing or permanently blocking production from the isolated segment. The process includes the installation of a removable sealing element and a permeability poison that forms a fluid seal to prevent longitudinal fluid flow along the annular production space outside the tubular production pipe. With wireline or other low-cost wellbore workover systems, access is re-engaged with the secluded formation including removal of plugs and fluid seals within the tubular production pipe. The inventive process allows enhanced recovery of fluids by focusing treatments on problem areas without harming productive segments of the well.