Data obtainable with a low cost wellsite total gas detector can provide valuable assistance in production drilling. Gas liberated by the drill bit into the drilling mud is an effective tool for accurate perforation selection even if wireline log interpretation proves inconclusive. Gas produced into the mud system by the formation ...

A system is described for detecting abnormalities in a gas engine with at least one cylinder and a fuel gas shut-off valve and means for closing the shut-off valve upon detection of an abnormality. The system consists of: pressure detecting means for detecting the pressure ...

Careful monitoring of mud gas has proven to be invaluable for predicting the occurrence and magnitude of geopressures. Related techniques were used to determine mud weight requirements and casing setting depths for a wildcat that encountered abnormal pressures.

A device for preventing abnormal flow of gas fuel from a gas fuel injector of a diesel engine is described comprising: a pipe means for supplying a pressurized gas fuel; a fuel injector means including a housing having a passage connected to the pipe means and leading to fuel injection nozzle ...

A system is described for detecting and diagnosing problem gas-lift wells based on well test data. Wells are screened so that only those with abnormal producing conditions are identified for further analysis. The analysis utilizes well tests and installation specifications to define troubles and predict efficient gas injection rates. ...

Oil and gas well blowouts are discussed, along with how to prevent and contain blowouts. The contents include: well control equipment; well control procedures and principles; special problems; blowouts; well planning; abnormal pressure detection; drill pipe and casing data; and well control contingency planning. (JMT)

Ceresin wax, n-octacosane, and methane have been subjected to treatment in a plasma discharge of the abnormal negative glow type. A polymer formed on a liquid-nitrogen temperature substrate plate as a result of the treatment. The polymer was collected and...

Methane dissolved in saline formation waters under abnormally high pressure (geopressure) is one of several unconventional gas sources that is under intensive investigation by the Department of Energy. The most well-known and studied region of geopressure...

Traditional formation pressure prediction methods all are based on the formation undercompaction mechanism and the prediction results are obviously low when predicting abnormally high pressure caused by compressional structure overpressure. To eliminate this problem, we propose a new formation pressure prediction ...

Irregular pressure regulation and abnormally high system pressures occurring under certain conditions in a standard carbon dioxide gas supply system used for artificial limbs have been investigated. A major reason for the reported malfunctioning was found...

Oil and gas distribution is generally influenced by both formation temperature and formation pressure. The present paper provides an analytical study of these parameters. In the clastic Tertiary Gulf Coast sediments, the highest concentration of all hydrocarbons is encountered near the onset of abnormally high formation ...

With the help of a dynamic mathematical model, the differential pressure across the waterwall in a PFBC (pressurized fluidized bed combustion) boiler is analyzed under abnormal conditions. The simulation tests have shown that the differential pressure will exceed design specification when the bursting diaphragm at ...

The pressure algometer probe tip is usually held stationary and pressure is steadily increased from zero until a pressure pain threshold (PPT) is elicited. In order to explore the extent of surface markings of abnormally tender regions in more detail an improved method is proposed whereby the ...

The 75-page report describes and analyzes the occurrences of multiple zones of abnormal formation pressure that were encountered in nine wells drilled in the Navarin basin. The report provides a discussion of the abnormal pressure response on wireline logs and drilling parameters, and a comparison between direct ...

Static reservoir pressures are required for all gas material balance calculations. A technique has been developed for using single point, transient shut-in pressures to estimate original gas in place for pressure depleting gas reservoirs. The line generated from two or more ...

A method to predict the percent recovery of volumetric, high-pressured gas reservoirs from the initial pressure to the abandonment pressure, using only initial reservoir data is presented. This method can also be used with early-life production data to predict the initial gas in place. The ...

Pressure seals are economically significant geological phenomena because they play an important role in deep natural gas entrapment. Pressure seals identified in basins worldwide may offer a new frontier for exploring natural gas reservoirs below {minus} 10,000 ft. Pressure seals are ...

Oil and gas are common in stratigraphic traps in structural basins, both deep down near the bottom, and also along the flanks. In many of these traps initial reservoir pressures were subnormal, indicating lack of permeable connection to the outcrop. Some maps drawn on the potentiometric (piezometric) surface using pressure data from ...

Hinde field is located downdip from the Vicksburg fault zone in an area of abundant gas production. The gas is produced from abnormally pressured sandstones. The local structure consists of a major listric normal fault that acts as a detachment surface on top of the Jackson shale. Rollover closure is present, with ...

The significance of underpressured reservoirs has been somewhat neglected because underpressuring is difficult to detect. Oil and gas reservoirs with abnormally high or abnormally low pressures are present in many basins in the US and worldwide. The above-normal (overpressured) reservoirs are generally deep (> ...

Full-length nuclear fuel rods were tested in a furnace to simulate the slow heating rates postulated for commercial pressurized water reactor fuel rods exposed to an overheating event in a storage cask. Fuel rod temperatures and internal gas pressures were monitored during the test and are presented along with mensural data for ...

Twenty-four separate gas fields producing from geopressured sands have been identified in the South Texas area that includes Hidalgo, Cameron, Willacy and the lower half of Kenedy Counties. Of these, twenty are in Hidalgo County. Geological study and deta...

BS>A shutdown device for gas-cooled reactors is designed which is operated automatically in response to abnormal conditions in the reactor and independertly of the electrical safety circuits of the reactor. The device comprises a latch for suspending a control rod above a reactor channel, and a mechanism for releasing the latch. The mechanism ...

The behavior of abnormal pressure reservoirs is of current interest to the industry. Preliminary information indicates that such reservoirs require some special handling. The purpose of this study is to present the basic data of the early history of an abnormal pressure reservoir. The basic data presented should be ...

The deep gas reservoirs of Lake Sand Field, Louisiana are Miocene sandbodies overlain and underlain by shale masses. They have trapped gas in the anticlinal closures against faults behaving as fluid barriers. The sands are geopressured reservoirs with pressure gradients up to 0.9 psi/ft. For all of the reservoirs the plots of ...

Subsurface water exists in a dynamic state, and the condition of hydrodynamic flow, or potential for flow, is indicated by abnormal fluid pressures. Excess pressures indicate updip flow of water and transfer of hydrocarbons from source rock to reservoir in stratigraphic or structural traps. Deficient pressures most ...

Pressure seals are economically significant geological phenomena since they play an important role in deep natural gas entrapment. Identified in basins worldwide, they offer a new frontier for exploration of natural gas reservoirs below 10,000 ft. (3000 m). Pressure seals are low-permeability envelopes which ...

Conservation equations are derived for the motion of a small inert gas bubble in a large flowing liquid-gas solution subjected to large thermal gradients. Terms which are of the second order of magnitude under less severe and steady-state conditions are retained, thus resulting in an expanded form of the Rayleigh equation. The bubble dynamics is ...

Abnormally high pressure, sour, carbonate Devonian reefs have caused drilling and completion difficulties since the West Pembina, Alberta, Field was was discovered in 1977. This work deals with the practical aspects of the kill operations under sour gas conditions. These sealed devonian Nisku Reefs vary in pore ...

Abnormal decline in gas production rates and predicted ultimate recovery in many intermediate and deep artificially stimulated gas reservoirs in south Texas are brought about by a rapid decline in bottom-hole flowing pressures. The pressure drops occur due to crushing of sand proppants in the ...

The Anadarko Basin in Oklahoma, the Texas Panhandle, and in SW. Kansas contains many reservoirs which produce commercial quantities of gas with subordinate quantities of oil. The producing formations are Permian; Upper, Middle, and Lower Pennsylvanian; Upper and middle Mississippian; Hunton; and Ordovician. Each of these groupings can be considered a genetic stratigraphic unit ...

What Is Hypotension? Hypotension (HI-po-TEN-shun) is abnormally low blood pressure. Blood pressure is the force of blood pushing against the walls of ...

Solubilities of carbon dioxide in aqueous ethanol solutions, determined at 15, 20, 25, 30 and 35/sup 0/C at atmospheric pressure, show a minimum at each temperature. Thermodynamics functions for the solution process were calculated and compared with the predictions of the Pierotti gas solubility theory. The abnormal behavior of these ...

Planning and implementation are extremely critical. Also, the timely preparation of data for obtaining all permits is very important. Another important factor in successful deep drilling is the environment, both downhole and surface. An example is presented which details preparation for the drilling, completion, and production flow testing of a deep, abnormal ...

A safety device for the control of gas-cooled reactors is described. The neutron-absorbing control rods are lowered vertically into passages between the fuel channels by a suitable transmission mechanism automatically in response to an abnormal condition in the reactor pressure vessel. The device operates independently of the ...

A critique of a recently completed, ERDA-sponsored study on methodology for geopressured zones is presented. The study is entitled ''Development of an Assessment Methodology for Geopressured Zones of the Upper Gulf Coast Based on a Study of Abnormally Pressured Gas Fields in South Texas, Final ...

This action plan defines (1) the criteria and specification limits required for ensuring that the tanks are maintained in a safe condition, (2) the organizations responsibilities, and (3) the response actions for prevention or mitigation of excessive temperature or pressure or a release from any hydrogen or flammable gas-generating tank. 15 refs., 1 tab.

... Title : THE EFFECTS OF INTERNAL GAS PRESSURE AND MICROSTRUCTURE ON THE MECHANISMS OF HOT-PRESSING AND ...