• Xưởng sửa chữa và chuẩn chỉnh máy địa vật lý

    Xưởng có nhiệm vụ chính là bảo dưỡng, sửa chữa và hiệu chỉnh các máy móc thiết bị điện tử phục vụ cho các đơn vị trong Xí nghiệp địa vật lý giếng khoan. Ngoài ra xưởng còn nghiên cứu đưa vào ứng dụng và phát triển công nghệ tin học trong công tác địa vật lý

  • Trung tâm Phân tích và Xử lý số liệu

    Có nhiệm vụ đánh giá chất lượng tài liệu do Xí nghiệp Địa vật lý thực hiện.

  • Đội công nghệ cao

    Khảo sát địa vật lý tổng hợp trong giếng đang khoan. Đo địa vật lý tổng hợp, bắn mìn.

  • Đội Kiểm tra công nghệ khai thác

    Có nhiệm vụ là đo khảo sát và kiểm tra công nghệ khai thác trong các giếng khai thác và bơm ép.

  • Đội Carota khí

    Đội Carôta khí có nhiệm vụ chính là khảo sát carota khí, cung cấp kịp thời các số liệu để xác minh trữ lượng, tình trạng các giếng khoan.

  • Đội thử vỉa

    Đội có nhiệm vụ thử vỉa ở các giếng khoan nhằm định hướng cho công tác khoan, xác định tình trạng và đo vỉa, cung cấp thông tin để xác định trữ lượng công nghiệp của giếng

L&TD

LOGGING & TESTING DIVISION

XÍ NGHIỆP ĐỊA VẬT LÝ GIẾNG KHOAN - BẠN ĐỒNG HÀNH CỦA CÁC NHÀ DẦU KHÍ

Case - Hole Logging

Tubing Inspection by 24 Fingers MIT

DESCRIPTION

The Sondex 24 finger MIT has been designed to provide the most accurate tubing caliper measurements in the industry. The high quality of the data allows for 3 dimensional imaging and the calculation of rates of corrosion or scale deposition.

OPERATING PRINCIPLE 

The tool is run in the hole using mono-conductor cable or  Slickline. Once at the bottom the fingers are motored open. The spring loaded, hardened tip fingers push against the ID of the casing or tubing with a low constant force. As the tool is logged up the well, the movement of each finger is transferred to a position sensor. The output of the position sensor is then digitized for recording into memory or transmission up hole. Data from each finger is monitored independently. At the end of the run the fingers are motored closed for pulling out of hole or for repeat logging. The tool contains an inclinometer to denote the high side and well deviation. The temperature of the electronics is monitored for software correction of sensor drift.

APPLICATIONS 

• Quantification of scale build up and corrosion.

• Accurate location of holes or anomalies.

• Identification of tubing items and damage.

INTERFACES & TOOL COMBINATIONS

Switch-able for operation with other PLT tools (Ultralink only).

OPTIONS 

Stainless Steel or Beryllium-Copper Fingers.

Memory or Surface Readout (Slickline or Mono-conductor cable)

MITpro statistical joint analysis software

MITview 3D imaging software

SPECIFICATIONS (1 11/16" 24 FINGER MIT)


            The MIT-24 is widely used for tubing inspection in Vietsovpetro’s oil fields. Pictures below show some results of 1-11/16“ OD 24 FINGER MIT TOOL.

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Casing Inspection by 40-60 Fingers MIT

DESCRIPTION

The Sondex 40 and 60 finger MITs have been designed to provide the most accurate casing caliper measurements in the industry. The high quality of the data allows for 3 dimensional imaging and the calculation of rates of corrosion or scale deposition.

OPERATING PRINCIPLE

The tool is run in the hole using mono-conductor cable or Slickline. Once at the bottom of the logging interval the fingers and integral centralisers are motored open. The spring loaded, hardened tip fingers push against the ID of the casing or tubing with a low constant force. As the tool is logged up the well, the movement of each finger is transferred to a position sensor. The output of the position sensor is then digitised for recording into memory or transmission uphole. Data from each finger is monitored independently. At the end of the run the fingers are motored closed for pulling out of hole or for repeat logging. The tool contains an inclinometer to denote the high side and well deviation. The temperature of the electronics is monitored for software correction of sensor drift.

Application:

Quantification of scale build up and corrosion.

Accurate location of holes or anomalies.

Identification of tubing items and damage.

INTERFACES & TOOL COMBINATIONS

Switchable for operation with other PLT tools (Ultralink only).

SPECIFICATIONS


2 3/4" OD 40 Finger MIT 4" OD 60 Finger MIT
Diameter 2 3/4" (70mm) 4" (102mm)
Length
20 000 psi (137 900 kPa)
65.6" (1840mm)
Max hole
83.46" (1730mm)
65.6" (1840mm)
Weight
68 lbs (30 kg)
100 lbs (45kg)
Measurement range
3 -7.5" (76-190mm)
4 1/2” –9 5/8" (114-245mm)
Radial Resolution
0.005" (0.127mm)
0.007" (0.13mm)
Radial Accuracy +/- 0.03" (0.762")
Vertical Resolution
0.082" @ 30 ft/min
0.11" @ 30ft/min
Inclinometer Accuracy 5 degrees rotation deviation
Finger Contact Force 0.75 to 1.25 lbs
Max. Pressure 15,000 psi
Max Temperature 177 degree C
Materials Corrosion Resistant Throughout

Up to now, Vietsovpetro L&TD has conducted more than 250 jobs of csing inspection using Sondex MultiFinger Image Tools in Vietsovpetro’s oil fields. The result of these surveys have allowed the company to plan the proper solution for remedial works.

This is a very reliable, flexible tool with little less operation cost. It can be used in any well conditions (oil, gas, water, mud).

The pictures below are typical cases of broken casings observed in White Tiger production wells using 40-60 fingers MIT tools.

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Casing Inspection CAST-V

             The newest generation Circumferential Acoustic Scanning tool, the CAST-V made by Halliburton, provides a wealth of information in both open and cased holes. In cased holes, ultrasonic pipe inspection and cement evaluation can now be obtained simultaneously. In open holes, the CAST-V provides complete borehole imaging for accurate formation evaluation.

 

Operating over a wide range of downhole environments, the CAST-V data can be presented in a variety of two- and three- dimensional formats. Powerful, yet user-friendly imaging analysis software is available to process the images, histograms and curve-type data.

Specifications

 Temperature

 Rating

 Pressure Rating

 OutsideDiameter

 Length

 Weight

350oF

20,000psi

3.625 in.

215 in.

316 lb

175oC

137900 kPa

92 mm

5.46m

143 kg


Casedhole Operation

Recommended Range of Casing Sizes* 51/2 to 133/8 in. 139 to 340 mm
Azimuthal Resolution
3.6o
Vertical Sample Rate
6 in. / 3 in. / 1 in.
Logging Speed
60 ft/min / 30 ft/min / 10 ft/min
Primary curves Reflected Amplitude, Radius, Acoustic Impedance, and Casing Wall Thickness
Secondary curves
Deviation, Relative Bearing, Compressive Strength, Fluid Transit Time, and Mud Impedance
   

Primary applications include:

  • Casing Inspection (Both Thickness And Diameter).
  • Ultrasonic Cement Evaluation Imaging.
  • Open Hole Borehole Imaging.
  • Fracture Detection.

 

CAST-V – A COST-EFFECTIVE TOOL

  FOR CASING INSPECTION AND CEMENT EVALUATION.

   CAST-V has been used by Vietsovpetro L&TD for casing inspection and cement evaluation.    

   Cased hole diagnostic applications provide the following information:  

            - Detailed radial caliper information, precise perforation location,  

            - Casing damage inspection, corrosion effects description, real pipe wear identification.

                - Evaluation of complex and lightweight cement

   This plot of casedhole logs displays VDL in Track 3 and Impedance map in Track 5. They clearly indicate that interval 2440-2532 m, cement bonding is poor, the lower shows good bonding.
   This plot of casedhole logs displays I.D map in Track 4 and Thickness map in Track 6. They clearly indicate corrosions in interval 1060-1100m

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    1. INTRODUCTION  

  • Formed in 1991
  • Consist of 
  • 02 Production wire-line teams  
  • 02 Casing inspection teams  
  • 01 Memory team. ( in 2003)  
  • Personal : 21
  • Engineer: 12
  • Skilled worker: 9 
  • Perfomed
  • Over 300 PLT jobs
  • Over 200 Casing/tubing inspection jobs

Read more ...

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