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Hydrofracture bottom-hole pressure monitoring process

A bottomhole pressure and monitoring process technology, which is applied in the field of development and oil and gas field exploration, can solve the problems of large differences in physical properties at buried depth, failure to consider wellbore friction resistance, working fluid viscosity, and inaccurate reservoir evaluation, etc.

Inactive Publication Date: 2012-06-27
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This common practice based on experience also has shortcomings. The same reservoir has different burial depths and physical properties in different blocks, and the fracturing construction data are all taken from the ground, without consideration of wellbore friction and working fluid viscosity. and other factors, the evaluation of the reservoir based on surface parameters is inaccurate

Method used

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  • Hydrofracture bottom-hole pressure monitoring process

Examples

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Effect test

Embodiment 1

[0020] The hydraulic fracturing bottomhole pressure monitoring process includes the following steps: 1) The pressure monitoring device carrying the high-precision electronic pressure gauge 3 is lowered into the vicinity of the fracturing bottomhole measure layer while drilling; 2) The high-precision electronic pressure gauge 3 monitors the entire fracturing The bottom hole pressure and temperature changes are monitored throughout the process; 3) After the fracturing is completed, the pressure monitoring device is pulled out while drilling or pulled out through steel wire operation.

Embodiment 2

[0022] The hydraulic fracturing bottomhole pressure monitoring process includes the following steps: 1) The pressure monitoring device carrying the high-precision electronic pressure gauge 3 is lowered into the vicinity of the fracturing bottomhole measure layer while drilling; 2) The high-precision electronic pressure gauge 3 monitors the entire fracturing The bottom hole pressure and temperature changes are monitored throughout the process; 3) After the fracturing is completed, the pressure monitoring device is pulled out while drilling or pulled out through steel wire operation. Such as figure 1 As shown, when the fracturing monitoring device is used for oil well single-layer fracturing operations, it consists of a throttle nozzle I1, a pressure gauge support cylinder 2, a double male dead plug 4, a slotted pipe 5, and a throttle nozzle II6. , a packer 7, and a hydraulic anchor 8 are sequentially connected in series from bottom to top, and a high-precision electronic press...

Embodiment 3

[0024] The hydraulic fracturing bottomhole pressure monitoring process includes the following steps: 1) The pressure monitoring device carrying the high-precision electronic pressure gauge 3 is lowered into the vicinity of the fracturing bottomhole measure layer while drilling; 2) The high-precision electronic pressure gauge 3 monitors the entire fracturing The bottom hole pressure and temperature changes are monitored throughout the process; 3) After the fracturing is completed, the pressure monitoring device is pulled out while drilling or pulled out through steel wire operation. Such as figure 2 As shown, when the above-mentioned fracturing monitoring device is used for the two-layer fracturing operation of the static string, it is composed of a throttle nozzle I1, a pressure gauge support cylinder 2, a double male dead plug 4, and a slotted pipe 5. , throttle nozzle II 6, tubing 10, eccentric pressure gauge holder 9, packer 7, and hydraulic anchor 8 are sequentially conne...

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Abstract

The invention relates to a protection technology in the field of exploration and development of oil and gas fields, in particular to a hydrofracture bottom-hole pressure monitoring process, which includes the steps of firstly, tripping in a pressure monitoring device with a high-precision electronic pressure gauge (3) to the bottom of a fractured well near a measure stratum along with drilling; secondly, using the high-precision electronic pressure gauge (3) to monitor bottom-hole pressure and temperature change in the full fracturing course; and thirdly, tripping out the pressure monitoring device along with drilling or fishing the pressure monitoring device through wireline operation after fracturing is complete. By the process, the bottom-hole temperature and pressure change in the full fracturing course can be monitored in real time, and pressure and temperature data of the mass nearby a reservoir stratum in the process of fracturing, opening the well for gushing and swabbing can be recorded truly and accurately. The measure stratum is estimated accurately, and basis for utilizing fracturing design software to scientifically compile new fracturing schemes for a new well is provided. The process is applicable to monitoring of single-stratum and double-stratum hydrofracture bottom-hole pressure of oil wells and single-stratum hydrofracture bottom-hole pressure of gas wells.

Description

technical field [0001] The invention relates to a protection technology in the fields of exploration and development of oil and gas fields, in particular to a hydraulic fracturing bottom hole pressure monitoring technology. Background technique [0002] In the field of fracturing operations in Changqing Oilfield, the fracturing construction parameters are usually recorded automatically by the on-board data acquisition system of the fracturing construction instrument or read from the instrument on the fracturing vehicle. Through the collection and sorting of a large number of these data, after analysis and research, the unique reservoir characteristics of the corresponding measure layer are summarized, so as to formulate a reasonable new well fracturing plan and determine the fracturing operation parameters. This common practice based on experience also has shortcomings. The same reservoir has different burial depths and physical properties in different blocks, and the fractu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/06E21B43/26
Inventor 高金洪常树发陈磊谢平李志群袁冬蕊王鹏
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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