SU489057A1 - Method for determining relative capacity of fractured cavernous and karst reservoirs opened by a borehole - Google Patents

Method for determining relative capacity of fractured cavernous and karst reservoirs opened by a borehole

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Publication number
SU489057A1
SU489057A1 SU1989949A SU1989949A SU489057A1 SU 489057 A1 SU489057 A1 SU 489057A1 SU 1989949 A SU1989949 A SU 1989949A SU 1989949 A SU1989949 A SU 1989949A SU 489057 A1 SU489057 A1 SU 489057A1
Authority
SU
USSR - Soviet Union
Prior art keywords
borehole
relative capacity
determining relative
opened
cavernous
Prior art date
Application number
SU1989949A
Other languages
Russian (ru)
Inventor
Леонид Митрофанович Федин
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 filed Critical
Priority to SU1989949A priority Critical patent/SU489057A1/en
Application granted granted Critical
Publication of SU489057A1 publication Critical patent/SU489057A1/en

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  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Measuring Fluid Pressure (AREA)
  • Geophysics And Detection Of Objects (AREA)

Description

На фиг. 1 изображено устройство дл  реализации предлагаемого способа; на фиг, 2 - график зависимости времени от объема сжимаемой фазы. Нагнета  воздух в трубку 1, сжимают содержащийс  в емкости 2 объем воздуха V на величину объема вошаГ, заключенной в части трубки 1, высотой jt.При этом уро вень t-j устанавливаетс  на отметке 1/2 трубку 1 закрывают. Через некоторое врем  трубку открывают и измер ют врем  t восстановлени  уровн  воды в трубке из положени  Lg в первоначальное положение .Опыт повтор ют в той же последовательности , увеличива  V в два и три раза относительно первоначального. Во врем опытов первоначальное давление воздуха в емкости 2 было посто нным. Из графика (см. фиг. 2) видно, что логарифм относительного времени пропорционален относительному объему сжимаемой фазы, заключенной в единичной поре. Реализуетс  способ следующим образом В буровой скважине провод т контрольный замер электрического сопротивлени  пород. Герметизируют устье скважины и по давлением, превышающим на 20% максимальное давление потерь в кольцевом пространстве при последнем долблении, -задавливают промывочную жидкость в скважину (из расчета 6м на 10ОО м коллекторов Открыва1ст герметизирующее устройство и измер ют электрическое сопротивление пород до тех пор, пока не произойдет полное обратное вытеснение задавленного фильтрата Замеры производ т до тех пор, пока электриче кое сопротивление всех коллекторов не достигнет первоначальной (до задавливани  раствора) величины. Измер ют интервалы времени обратного вытеснени  зад .лВлеипсгофкльтр,;та. 3-; начало отсчет;:; при- нимают момент открыти  герметизирующего устье скважины устройства. Определ ют относительный объем коллекторов как логарифмы отнощени  времен обратного вытеснени  задавленного фильтрата; Vi.t, li у li t vr% 5 -1 V L Предмет изобретени  Способ определени  относительной емкости трещинно-кавернозных и карстовых коллекторов, вскрытых буровой скважиной, отличающийс  тем, что, с целью повыщени  точности измерени  относительной емкости трещинно-кавернозных и картовых коллекторов, пзмеНЯЮт времена полого обратного вытеснени  задавленного по райней мере в два коллектора фильтрата ромывочной жидкости и по отнощению этих времен суд т об относительной емкость оллекторов.FIG. 1 shows a device for implementing the proposed method; FIG. 2 is a graph of time versus compressible phase volume. Forcing air into tube 1, compress the volume of air V contained in tank 2 to the value of the volume of the vessel enclosed in part of tube 1 with a height jt. At the same time, level t-j is set at 1/2 the tube 1 is closed. After some time, the tube is opened and the time t to restore the level of water in the tube from the Lg position to the initial position is measured. The tests are repeated in the same sequence, increasing V by two and three times relative to the initial one. During the experiments, the initial air pressure in tank 2 was constant. From the graph (see Fig. 2), it can be seen that the logarithm of the relative time is proportional to the relative volume of the compressible phase contained in the unit pore. The method is implemented as follows. In a borehole, a control measurement of the electrical resistance of rocks is carried out. The wellhead is sealed and at a pressure exceeding the maximum loss pressure in the annular space by 20% during the last hammering, the drilling fluid is pumped into the well (at the rate of 6 m per 10OO m of the Open 1st collectors, a sealing device is measured and the complete extrusion of the crushed filtrate will occur. The measurements are performed until the electrical resistance of all the collectors reaches the initial (before the solution is crushed) value. Backward displacement time intervals are found in Lipmersoffer, 3; start counting;:; take the opening time of the wellhead sealing device. Determine the relative volume of the collectors as the logarithms of the displacement filtrate times out; Vi.t, li li t vr% 5 -1 VL Subject of the Invention A method for determining the relative capacity of fractured cavernous and karst reservoirs opened by a borehole, characterized in that, in order to improve the accuracy of measurement of the relative capacity of fractured cavernous Cartesian and collectors pzmeNYaYut times the displacement of the hollow reverse crushed by Raina least two collector romyvochnoy filtrate fluid and otnoscheniya these times is judged on the relative capacity ollektorov.

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SU1989949A 1974-01-18 1974-01-18 Method for determining relative capacity of fractured cavernous and karst reservoirs opened by a borehole SU489057A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1989949A SU489057A1 (en) 1974-01-18 1974-01-18 Method for determining relative capacity of fractured cavernous and karst reservoirs opened by a borehole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1989949A SU489057A1 (en) 1974-01-18 1974-01-18 Method for determining relative capacity of fractured cavernous and karst reservoirs opened by a borehole

Publications (1)

Publication Number Publication Date
SU489057A1 true SU489057A1 (en) 1975-10-25

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102608611A (en) * 2012-02-28 2012-07-25 太原理工大学 Detection device for underground horizontal salt rock cavity
RU176714U1 (en) * 2017-05-18 2018-01-25 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" INSTALLATION FOR RESEARCH OF THE PROCESS OF EXTRUSION OF SEQUENTIAL CURRENT LIQUIDS WHEN CEMENTING CASING
CN111851458A (en) * 2020-07-20 2020-10-30 重庆地质矿产研究院 Karst soil cave search positioning method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102608611A (en) * 2012-02-28 2012-07-25 太原理工大学 Detection device for underground horizontal salt rock cavity
RU176714U1 (en) * 2017-05-18 2018-01-25 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" INSTALLATION FOR RESEARCH OF THE PROCESS OF EXTRUSION OF SEQUENTIAL CURRENT LIQUIDS WHEN CEMENTING CASING
CN111851458A (en) * 2020-07-20 2020-10-30 重庆地质矿产研究院 Karst soil cave search positioning method

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