XÍ NGHIỆP ĐỊA VẬT LÝ GIẾNG KHOAN - BẠN ĐỒNG HÀNH CỦA CÁC NHÀ DẦU KHÍ
Processing & Interpretation services
Processing and interpretation for openhole log data
Processing and interpretation for casedhole log data
The Processing Interpretation Center has an international staff, including Petrophysicists,Geophysicists,Geologists,IT engineer and technicians. Engineers were graduated for the long term in well-known Universities Institutes in USSR and Vietnam and highly trained in specific subjects in USA, UK, Russian, etc.
All Processing & Interpretation Center’s engineers are trained in intensive training courses with particular regard to process and interpret logging data.
Most of them have more than 10 years working experiences.
The Processing & Interpretation Center have used the software of the well-known firms as: Halliburton (DPP, PETROSITE…), Schlumberger (IP), Huanding (Forward.net) Kappa (EMERAUDE, SAPHIR,…), ALT (WellCARD,…), Sondex (Warrior, MITCal, MITView, MITPro,…), Russia (LogPWIN) and the software of Vietsovpetro ( BASROC, 3DView,…). The staffs are graduated with high competence and experience in their professionals.
1. Openhole Data
Interactive Petrophysics is a portable PC-based software application for reservoir property analysis and summation. From simple workflows such as quality checking log data to performing complex tasks of multi-zone, multi-well petrophysical analyses, Interactive Petrophysics is ideal for both petrophysicists and geologists.
The SASHA program evaluates shaly sand reservoirs, and provides effective porosity, water saturation, clay and silt volumes. Sasha analysis can also determine the relative permeabilities. This is an industry standard shaly-sand analysis model.
CORAL Analysis provides an accurate detailed description of reservoirs and mixed lithology. Its primary use is in the evaluation of formations, which contain shale, sand, limestone, dolomite, anhydrite, and gypsum. The software will provide determination of shale content, cross plot lithology (sandstone-limestone or limestone-dolomite), anhydrite content, porosity, secondary porosity or gypsum (if an acoustic log is available), permeability and water saturation.
ULTRA is one of the most famous software in petrophysical analysis. This program is a set of software modules, designed to process wireline logs. ULTRA program is based on an optimization approach, computing the most probable parameters from the set of logs and local knowledge of the logging environment. The following Log Analysis Models are built in: Shaly Sand, Sand-Lime-Dolomite with up to six other minerals and clay, Igneous and metamorphic reservoir model.
Reservoir model – two porosities and two permeabilities: Macrofracture zones characterized by macro-fracture systems, distributed directionally with hydrodynamic permeability. Microfracture zones distributed along surfaces of macrofractures
BASROC is an advanced multi-mineral log analysis program for basement rock. It computes the most probable formation mineralogy and total porosity, open porosity using a multi-log, least-squares inversion technique. It is particularly valuable in areas of mixed lithologies, special minerals and two porosities systems. Grade porosity by filtered method. Calculate fracture porosity by looped technique.
FullWave software is a waveform diagnostic program. It can be used to display waveform data in time and frequency, perform frequency filtering, and for estimation compressional, shear, stoneley slowness using semblance processing from wave acoustic processing program and attenuation of Stoneley wave energy.
Beside that, FullWave module allows for Anisotropy Analysis
IMAGER is an interactive image interpretation software package used to present and analyze vector data from the Circumferential Acoustic Scanning Tool (CAST), Electric Micro Imaging (EMI) tool, Six arm Dipmeter. Imager allows displaying the logged data graphically in various ways. The images may be enhanced to emphasize certain features, facilitating the interactive dip calculations of planar feature, fracture identification & orientation and borehole breakout mapping.
2. Casedhole Data
Processing and interpretation for PL data
Cement bond evaluation
The basic reasons for casing a well are to provide wellbore stability, zonal isolation and control of well fluids. Cement provides mechanical support for the casing and the isolation seal between the casing and the formation. Without effective isolation there is a risk of communication between zones, water infiltration and leakage to the surface.
The L&TD’s available measurements from 4AK-1T, Sector Bond, BCDT and CAST-V tools are used for cement bond evaluation.
Casing and Tubing inspection
The productive life of an oil well can be reduced by the condition of the well itself. Deterioration of the casing or tubing can be caused by corrosion, unintentional damage during drilling and intervention or formation movement. Scale build-up can also reduce production. Remedial work can be minimized with exact knowledge of a well's condition. The operator can receive early warning of a potential problem and obtain data for determining a specific restoration program by running the casing inspection suite.
The L&TD’s available measurements from Max-Min or Multifinger Calipers and CAST-V tools determine the condition of the casing or tubing within a well.
MITpro software is used to process raw data from the Multifinger Imaging Tool (MIT). The MIT is used to detect changes of the internal diameter of tubing or casing; tool data is normally output as a log curve for each finger, which can be a significant amount of data to evaluate manually. The MITpro program has been developed as an aid for data processing and analysis.
Tool data is read by the MITPro software to determine the metal loss, scale build-up or damage in a completed well. Collars can be automatically detected, then the data for each joint of casing or tubing is processed and the percentage change of internal diameter from nominal is calculated. The analysis overview lists all potentially damaged pipe joints and a picture representing the pipe cross-section for each one can be generated to show the internal diameter change from nominal.
Well card software
3. DST Data
Well testing service was formed since 1984 and has been successfully tested hundreds of objects in the White Tiger, Dragon, Big Bear field , Soi and Hoang Long objects on Vietnam offshore, etc.
Saphir softwave has been used in L&TD since 2000. This is one of the best testing interpretation software. This software can estimate reservoir parameters as Pi - initial pressure, K - permeability, C - well bore storage, S - skin, R - effect radius, K.h – permeability-thickness product, etc. with high accuracy and reliability. It can interpret testing data in oil, gas, water well with different geological models.
4. Storage data
Logging data are stored secure in data base and paper documents in a store. It convenient for users upload or download data from data base and easy to find documents in the store.
Data are saved in to DVD every 3 months
The PIC has performed processing and interpretation for oil companies operating in Vietnam: