GB1429989A - Measurement of oil or gas content of earth formations - Google Patents

Measurement of oil or gas content of earth formations

Info

Publication number
GB1429989A
GB1429989A GB3767773A GB3767773A GB1429989A GB 1429989 A GB1429989 A GB 1429989A GB 3767773 A GB3767773 A GB 3767773A GB 3767773 A GB3767773 A GB 3767773A GB 1429989 A GB1429989 A GB 1429989A
Authority
GB
United Kingdom
Prior art keywords
oil
detector
earth formation
mev
log
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3767773A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chevron USA Inc
Original Assignee
Chevron Research and Technology Co
Chevron Research Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chevron Research and Technology Co, Chevron Research Co filed Critical Chevron Research and Technology Co
Publication of GB1429989A publication Critical patent/GB1429989A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/04—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
    • G01V5/08—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
    • G01V5/10—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources
    • G01V5/101—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources and detecting the secondary Y-rays produced in the surrounding layers of the bore hole
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/04—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
    • G01V5/08—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
    • G01V5/10—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources
    • G01V5/101—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources and detecting the secondary Y-rays produced in the surrounding layers of the bore hole
    • G01V5/102—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources and detecting the secondary Y-rays produced in the surrounding layers of the bore hole the neutron source being of the pulsed type

Landscapes

  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Measurement Of Radiation (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

1429989 Measuring oil/gas content of earth formations CHEVRON RESEARCH CO 8 Aug 1973 [21 Aug 1972] 37677/73 Heading G1A A method of determining differences in the fractional volume oil and/or gas content of a reservoir earth formation 12 containing oil and/or gas surrounding a well bore 10 comprises (i) obtaining a first neutron-activation oxygen log and thermalneutron-decay-time log (ii) changing the oil and/or gas content of the earth formation surrounding the well bore (iii) obtaining a second neutronactivation oxygen log and thermal-neutron-decaytime log and (iv) calculating the required differences in fractional volume oil and/or gas of the earth formation from the measured difference in oxygen response between steps (i) and (iii) and the determined difference in total thermal neutron capture cross-section between steps (i) and (iii). A sonde 17 supports 7 radiation detectors 24, 26, generator 28 producing 14 MeV neutrons by the deuterium-tritium interaction and detector 30 which measures the 7 radiation produced by decay of unstable O<SP>16</SP> which is formed when the 14 MeV neutrons strike O<SP>16</SP> nuclei to form unstable N<SP>1</SP><SP>6</SP> which decays with a 7À3 second time constant and which emits beta rays to form an excited state of O<SP>16</SP> which emits two 7 rays of 6À13 MeV and 7À10 MeV in returning to stable O<SP>16</SP>. The record of radiation detected by detector 30 is trace 68 on chart 42. Detector 26 is gated to sample γ- radiation produced by decay of thermal neutrons for one millisecond after a burst of fast neutrons has been emitted by generator 28. The measurement from detector 26 is recorded as trace 66 on the chart, by way of cable 19, slip ring assembly 72 oscilloscope 46 and amplifier 56. The oil content is changed by flooding the earth formation or by production of oil from the earth formation. The flooding is done with an alcohol or micellar solution through valve 82, pump 84 and perforations 16 in the well casing 14, the flooding reducing the oil content substantially to zero by displacement. The displacing agent must then be itself displaced by water with a salinity equal to that of the original formation water, because of the large thermal neutron capture cross section of chlorine nuclei. Cleaned formation water can be injected from tank 88 through valve 90. Further detector 24 senses the natural radio-activity, recorded as trace 64.
GB3767773A 1972-08-21 1973-08-08 Measurement of oil or gas content of earth formations Expired GB1429989A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00282618A US3817328A (en) 1972-08-21 1972-08-21 Neutron absorption and oxygen log for measuring oil content of formation

Publications (1)

Publication Number Publication Date
GB1429989A true GB1429989A (en) 1976-03-31

Family

ID=23082327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3767773A Expired GB1429989A (en) 1972-08-21 1973-08-08 Measurement of oil or gas content of earth formations

Country Status (4)

Country Link
US (1) US3817328A (en)
CA (1) CA992669A (en)
FR (1) FR2197183B1 (en)
GB (1) GB1429989A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322937A (en) * 1997-03-07 1998-09-09 Aea Technology Plc Multiphase fluid monitor

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE28963E (en) * 1973-11-28 1976-09-14 Continental Oil Company Determination of residual oil in a formation
US3993903A (en) * 1975-03-31 1976-11-23 Chevron Research Company Low-cost but accurate radioactive logging for determining gas saturation in a reservoir
US3993904A (en) * 1975-03-31 1976-11-23 Chevron Research Company Low-cost but accurate radioactive logging for determining water saturations in a reservoir
US3993902A (en) * 1975-03-31 1976-11-23 Chevron Research Company Radioactive logging for determining oil saturation in a reservoir
US4052893A (en) * 1976-09-29 1977-10-11 Standard Oil Company (Indiana) Measuring reservoir oil saturation
US4076980A (en) * 1976-10-26 1978-02-28 Texaco Inc. Radioactive well logging to measure earth formation fluid permeability by electrohydraulic induced flow of radiation activated fluids
US4102396A (en) * 1977-06-23 1978-07-25 Union Oil Company Of California Determining residual oil saturation following flooding
USRE31122E (en) * 1978-09-29 1983-01-11 Dresser Industries, Inc. Method for ascertaining optimum location for well stimulation and/or perforation
US4187908A (en) * 1978-09-29 1980-02-12 Dresser Industries, Inc. Method for ascertaining optimum location for well stimulation and/or perforation
US4338664A (en) * 1980-05-19 1982-07-06 Schlumberger Technology Corporation Method of evaluating formations traversed by a borehole
US4492864A (en) * 1981-07-31 1985-01-08 Texaco Inc. Neutron well logging
US4482016A (en) * 1983-11-17 1984-11-13 Shell Oil Company Acidizing with chemically heated weak acid
US5219518A (en) * 1989-10-02 1993-06-15 Schlumberger Technology Corporation Nuclear oxygen activation method and apparatus for detecting and quantifying water flow
US5094808A (en) * 1989-12-20 1992-03-10 Schlumberger Technology Corporation Oxygen activation downhole tool
USRE38052E1 (en) 1992-05-01 2003-04-01 Sensor Dynamics, Limited Sensing apparatus for sensing pressure or temperature in oil wells, including transmitter relaying pressure or temperature information to a remote control point
GB9324334D0 (en) * 1993-11-26 1994-01-12 Sensor Dynamics Ltd Apparatus for the remote measurement of physical parameters
US6532839B1 (en) * 1996-03-29 2003-03-18 Sensor Dynamics Ltd. Apparatus for the remote measurement of physical parameters
EP2348337B1 (en) * 2010-01-14 2014-04-16 Services Pétroliers Schlumberger Corrected porosity measurements of underground formations
US8528635B2 (en) * 2010-05-13 2013-09-10 Schlumberger Technology Corporation Tool to determine formation fluid movement
RU2537521C2 (en) * 2011-02-28 2015-01-10 Министерство образования и науки РФ Государственное образовательное учреждение высшего профессионального образования "Уральский государственный горный университет" Method of selecting gas hydrate-saturated reservoirs in well logs
WO2014081436A1 (en) * 2012-11-26 2014-05-30 Halliburton Energy Services, Inc. Method of determining a value indicative of fracture quality
US11209569B2 (en) 2019-07-02 2021-12-28 Weatherford Technology Holdings, Llc Neutron time of flight wellbore logging

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3282095A (en) * 1963-09-03 1966-11-01 Pan American Petroleum Corp Logging oil saturation in reservoir
US3334688A (en) * 1964-04-13 1967-08-08 Exxon Production Research Co Miscible displacement process using modified alcohol banks
US3508052A (en) * 1964-12-18 1970-04-21 Chevron Res Neutron absorption logging with thermal neutron-capture gamma rays having energies over 2.2 mev.
US3562523A (en) * 1967-04-26 1971-02-09 Shell Oil Co Method for determining residual oil content of a formation using thermal neutron decay measurements
US3465151A (en) * 1967-10-24 1969-09-02 Dresser Ind Method and apparatus for oxygen activation well logging
US3504744A (en) * 1968-07-15 1970-04-07 Marathon Oil Co Production of crude oil using micellar dispersions
US3631245A (en) * 1968-12-23 1971-12-28 Shell Oil Co Neutron method for determining residual oil-phase fluid concentration

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322937A (en) * 1997-03-07 1998-09-09 Aea Technology Plc Multiphase fluid monitor
GB2322937B (en) * 1997-03-07 2001-01-17 Aea Technology Plc Multiphase fluid monitor

Also Published As

Publication number Publication date
FR2197183A1 (en) 1974-03-22
US3817328A (en) 1974-06-18
CA992669A (en) 1976-07-06
FR2197183B1 (en) 1977-05-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920808