摘要:
Articles of manufacture are described called temporally degradable urns which are chemically and/or biologically degradable urns for the initial deposit of ashes following the cremation of human remains are described. Each temporally degradable urn is designed to degrade within a predetermined period of time following burial in the earth. Cemeteries comprised of one or more temporally degradable urns placed into the earth are described. Methods of operation of cemeteries for such temporally degradable urns are described which prescribe as little initial ecological disturbance as possible. After the predetermined period of time, the buried urns completely chemically and/or biologically disintegrate, therefore returning the land its previous ecological condition. Thereafter, that land becomes suitable for the preservation of flora and fauna. Such methods of operation of urn cemeteries can be used as the critical methodology for the routine and ongoing preservation of entire ecosystems.
摘要:
Methods of operation of an apparatus having at least two pairs of voltage measurement electrodes vertically disposed in a cased well to measure the resistivity of adjacent geological formations from inside the cased well. During stationary measurements with the apparatus at a fixed vertical depth within the cased well, the invention herein discloses methods of operation which include a measurement step and subsequent first and second compensation steps respectively resulting in improved accuracy of measurement. The invention also discloses multiple frequency methods of operation resulting in improved accuracy of measurement while the apparatus is simultaneously moved vertically in the cased well. The multiple frequency methods of operation disclose a first A.C. current having a first frequency that is conducted from the casing into formation and a second A.C. current having a second frequency that is conducted along the casing. The multiple frequency methods of operation simultaneously provide the measurement step and two compensation steps necessary to acquire accurate results while the apparatus is moved vertically in the cased well.
摘要:
Nucleons which are chemically bound to oil and water in geological formations possess magnetic moments which align in the earth's magnetic field causing the natural nuclear paramagnetism of the formation. An A.C. magnetic field at the Larmor frequency is repetititively applied to the formation adjacent to a borehole resulting in a repetitive excitation-relaxation process of the nucleons present within an "excitation zone" which results in an amplitude modulation of the paramagnetism within this zone. This physical process results in an amplitude modulation of the earth's magnetic field in the vicinity of the excitation zone of the formation and is called the Paramagnetic Logging Effect (PLE). The PLE may be measured with logging tools in open holes and within cased well bores. The PLE measures the following quantities within a predetermined excitation zone of the formation: amount of oil, amount of water, total fluid volume, the viscosity of oil present, oil saturation and water saturation factors, estimations of the permeability, positions of vertical oil and water boundaries adjacent to the borehole, and the locations of lateral discontinuities of the oil bearing formation. The PLE is sensitive to such parameters at least 10 feet laterally into formation and up to perhaps 100 feet radially away from the drill hole. A thorough theoretical description of the PLE in open holes and in the cased hole environment is presented along with the detailed engineering data necessary for the construction of practical tools. Another variety of the PLE is based on the repetitive excitation-relaxation process of natural electronic paramagnetic impurities found within petroleum. Measurement of the presence of such impurities indicate the presence of petroleum in formation.
摘要:
Methods to quantitatively determine the separate amounts of oil and gas in a geological formation adjacent to a cased well using measurements of formation resistivity are disclosed. The steps include obtaining resistivity measurements from within a cased well of a given formation, obtaining the porosity, obtaining the resistivity of formation water present, computing the combined amounts of oil and gas present using Archie's Equations, determining the relative amounts of oil and gas present from measurements within a cased well, and then quantitatively determining the separate amounts of oil and gas present in the formation.
摘要:
This invention relates to the measurement of the longitudinal components of low frequency A.C. magnetic fields from within cased boreholes which are used to measure geophysical properties of geological formations. The applied A.C. magnetic fields are generated by passing low frequency A.C. current through insulated wires or by conducting low frequency A.C. current through geological formations, either of which are examples of conducting A.C. currents through different "circuit pathways". The currents generating the applied A.C. magnetic fields are in the frequency range between 0.001 Hz and 20 Hz. The measured longitudinal components of the resulting total A.C. magnetic fields within the cased boreholes are responsive to various geophysical parameters which include the resistivities of the portions of the geological formations subject to said applied A.C. magnetic fields and to thickness variations of the casing. Calibration methods and apparatus reduce the influence of the unwanted effects due to thickness variations of the casing.
摘要:
A.C. current is conducted through geological formations separating two cased wells in an oil field undergoing enhanced oil recovery operations such as water flooding operations. Methods and apparatus are disclosed to measure the current leakage conducted into a geological formation from within a first cased well that is responsive to fluids injected into formation from a second cased well during the enhanced oil production activities. The current leakage and apparent resistivity measured within the first cased well are responsive to fluids injected into formation from the second cased well provided the distance of separation between the two cased wells is less than, or on the order of, a Characteristic Length appropriate for the problem.
摘要:
A new method and apparatus is described which allows remote sensing and in-situ volumetric measurement of liquid petroleum reserves. A small fraction of the nuclear magnetic moments of protons in a liquid oil reserve align in the earth's magnetic field. This nuclear paramagnetism slightly alters the strength of the earth's static magnetic field above the oil reservoir. The size of the paramagnetic contribution to the earth's magnetic field is proportional to the volume of the petroleum reserve. An artificial A.C. magnetic field is applied to the bulk oil reserve at the Larmor frequency. This A.C. magnetic field causes the condition appropriate for nuclear magnetic resonance which under certain circumstances, causes the paramagnetic contribution to the earth's magnetic field to vanish. Different phenomena causing this paramagnetic contribution to vanish include saturation effects and the conditions described by rapid passage.Under these circumstances, frequency sweeping the A.C. magnetic field through magnetic resonance while simultaneously measuring the variation earth's magnetic field yields a direct measure of the total volume of the oil reserve. Numerous means are utilized to produce the appropriate A.C. magnetic field including simply passing an A.C. current through the oil formation between two boreholes. In this case, a sensitive induction magnetometer senses the change in the earth's magnetic field as the A.C. current is frequency swept through resonance. Methods are disclosed which also allow the determination of some characteristic dimensions of the oil deposit. Appropriate measurement of the relaxation of the earth's magnetic field after passage through resonance yields the oil/water ratio under certain circumstances.
摘要:
A monolithic long lasting rotary drill bit for drilling a hole into a geological formation having at least one hardened rod which has a length of at least three times its diameter composed of hard material such as tungsten carbide that is cast into a relatively soft steel matrix material to make a rotary drill bit that compensates for wear on the bottom of the drill bit and that also compensates for lateral wear of the drill bit using passive, self-actuating mechanisms, triggered by bit wear to drill relatively constant diameter holes.
摘要:
Methods and apparatus are disclosed which allow measurement of the resistivity of a geological formation through borehole casing which may be surrounded by brine saturated cement. A.C. current is passed from an electrode in electrical contact with the interior of the borehole casing to an electrode on the surface of the earth. The A.C. voltage difference is measured between two additional vertically disposed electrodes on the interior of the casing which provides a measure of the resistivity of the geological formation. A calibration and nulling procedure is presented which minimizes the influence of variations in the thickness of the casing. The procedure also minimizes the influence of inaccurate placements of the additional vertically disposed electrodes.
摘要:
New methods and apparatus are disclosed which allow measurement of the presence of oil and water in gelogical formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleous present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth's magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation. The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be preformed in open boreholes and in cased well bores. The Dual Excitation Acoustic Paramagnetic Logging Tool employing two acoustic sources is also described.