Rig up.
Lubricator on. Tool string made up. Line tension checked. Our computerized logging units roll out of Bakersfield, Los Angeles and Fallon, Nevada — or ship anywhere in the world.
Bakersfield, California · Est. 1990
See what your well is really doing.
Well Analysis Corporation is the largest production logging company on the West Coast. We build our own downhole tools, run them from our own units, and put an answer on your desk instead of just a log.
PRODUCTION LOGGINGWIRELINE OPERATIONSGEOTHERMAL PTSTOOL FABRICATION
DEPTH0 FTCASING 7-5/8"
scroll to descend
Read the heat.
High-resolution temperature, ±2°F, 0–600°F, 15,000 psi. Built with Texaco R&D to track steam movement across whole fields. It is the survey that shows where injection really goes.
- ±2°F accuracy
- 0–600°F
- 15,000 psi
Which perfs produce.
The fullbore spinner samples the whole pipe. Each set of perforations gets a number: how much it contributes, and whether it is oil, water or just a hole in the casing.
- Fullbore flowmeter
- Entry profile
- Rate by zone
Oil or water.
Capacitance reads the fluid around the sensor and tells water from hydrocarbon. On the same descent as spinner and temperature, it pins down exactly where the water is coming in.
- Fluid ID
- Water holdup
- Same trip
The shape of your casing.
Spring arms ride the wall and log internal diameter inch by inch. Scale, corrosion, collapse and ovality stop being a suspicion and become a measurement.
- Multi-arm
- ID & ovality
- Scale · corrosion
Hear the leak.
Hydrophones listen for fluid moving behind pipe: cement channels, packer leaks, casing holes. Noise logging finds the problems that never show up as a temperature change.
- Behind-pipe flow
- Channel detection
- Stationary reads
Where the water goes.
Temperature, CCL, spinner and I-131 tracer on one string. Water and steam injection surveys find packer leaks, top-perf leaks, casing holes and plugged perfs before they cost you a pattern.
- 350°F · 15,000 psi
- I-131 tracer
- Water · steam
Built for 600°F.
A 1.83-inch heat-shielded PTS string that goes through tubing and logs through casing. Mil-grade components and stringent calibration keep the data stable, log after log, in the hottest wells on the West Coast.
- 1.83" OD
- Through tubing
- E-line or memory
Log complete.
Depth-matched channels, drafted in-house, reproduced in-house. Turnaround is measured in hours because our tech department keeps every truck and every computer working. Now meet the tools.
MEASURED DEPTH
0FT
SURFACE
WELACOPROD. LOG
TEMP SPIN HOLDUP
Tool catalogue
Built in our shop.
Run by our crews.
scroll · tool rotates and comes apart
1990Opened with three logging units and one contract, Shell Oil
3Offices: Bakersfield, Los Angeles, Fallon NV
9U.S. states logged, on and offshore
12Countries, from Canada to Turkmenistan
#1Largest production logging company on the West Coast
Production logging
Every survey a producing
or injecting well needs.
Gas storage, steam floods, water floods, disposal wells, geothermal. One call, one crew, one depth-matched log.
01
Steam Injection Survey
Track where the steam goes and which zones take it. Quarterly or bi-annual surveillance across the whole flood.
02Water Injection Survey
Temperature, CCL, I-131 tracer and spinner on one string. Finds packer leaks, top-perf leaks, casing holes and plugged perfs. Rated 350°F, 15,000 psi.
03Temperature Survey
High-resolution tool, ±2°F, 0–600°F, 15,000 psi. Developed with Texaco R&D for steam-flood surveillance.
04Fluid Entry Survey
Fullbore spinner plus capacitance. A real production profile: what each set of perforations gives you, and what it is.
05Capacitance Survey
Oil, water or gas, and how much of each. The fastest way to find where water is entering a producer.
06Caliper Survey
Multi-arm casing inspection. Internal diameter, scale, corrosion, collapse and ovality, measured instead of guessed.
07Noise Survey
Listen for channeling, leaks and behind-pipe flow that no temperature log can see.
08Dual-Spaced Neutron
Porosity and gas through casing. Time-lapse monitoring of contacts without pulling tubing.
09CHAT · Cased Hole Analysis
Our combination string. Pressure, temperature, capacitance, spinner and CCL in one trip, one log, one answer.
Wireline operations
Slickline and braided line,
on our own units.
Surveys, safety valves, plugs, fishing, perforating, sampling. The same crews that log your well can service it on the same day.
Get a wireline crew- Pressure & temperature surveysGradient, traverse and fluid level
- Safety valve removal & replacementAll major manufacturers. Wireline-set and insert valves for tubing-retrievable systems
- Downhole plug workRemove, redress, replace. Tubing set DW & TSB, collar set DD, nipple set XX, S & FVL. Halliburton, Baker and Camco types
- Running & pulling toolsStanding valves, gas-lift, chokes, plugs and more
- Scale & paraffin cuttingRestore tubing ID without a rig
- Fishing servicesFor wire and tools, slickline or braided line
- Braided line servicesHeavy pulling, swabbing and fishing
- Tubing swagingSwages and swab cups
- Single-shot mechanical perforator2-3/8" to 3-1/2" tubing. Perforator, shell and button hole puncher
- Fluid samplingTimer and mechanical samplers
- BailingSample, pump, drive-down and hydrostatic bailers
Fabrication & tech department
We don't wait
on a vendor.
Our machine shop builds the downhole tools you just watched. An electronics engineer on staff designs and repairs the boards inside them. When a tool breaks at 2 a.m., it is fixed in Bakersfield, not shipped to Houston.
That is the whole reason WELACO can keep quality high and turnaround short while the industry gets busier.
SHOP
Full machine shop
Downhole logging tools, offshore skid units, portable mast units, complete wireline units and electronic line units. Modification of existing equipment.
R&D
Full-time R&D
A standing research and development program so the newest and most accurate technology ends up on your well, not in a brochure.
TECH
Technical department
Keeps the computers in the office and on every truck working, so the turnaround on your survey stays measured in hours.
DRAFT
In-house drafting & log reproduction
Your log is drafted, reproduced and delivered by the people who ran it.
Geothermal
High-temperature
wireline, done right.
A 1.83-inch tool string that reaches zones of interest through the tubing and evaluates them through both tubing and casing. High-speed, stable electronics and optimized detectors give log data with far less statistical uncertainty than conventional devices.
Because the point of the program is reservoir monitoring and time-lapse logging, calibration and QA are strict: API and industry-standard compliance, plus periodic operating-characteristic checks at our technical facility. Same response on every log, so you can trust the difference between them.
GEOTHERMAL PTS · SPECWAC-GEO-183
- O.D. in heat shield
- 1.83 in
- E-line tool length
- 96.93 in
- Memory tool length
- 96.93 in
- Conveyance
- E-line or memory
- Access
- Through tubing & casing
- Components
- Mil-grade selection
- QA
- API + periodic OC checks
APPLICATIONS
- Temperature zone identification
- Fluid movement monitoring
- Wellbore potential evaluation
- Downhole P-T-S monitoring
- Casing integrity evaluation
- High-temperature wireline services
Where we've worked
Home is Kern County.
The work is everywhere.
DOMESTIC · 9 STATES
- Arizona
- California
- Colorado
- Hawaii
- Louisiana
- Nevada
- New Mexico
- Texas
- Utah
INTERNATIONAL · 12 COUNTRIES
- Canada
- El Salvador
- Indonesia
- Kenya
- Mexico
- New Zealand
- Nicaragua
- Philippines
- Tunisia
- Turkmenistan
- Venezuela
- Yemen
OFFSHORE
Offshore skid units built in our own shop. We have logged on and off shore across the western United States and overseas, with active service in Indonesia and the Philippines.
About WELACO
Three analog trucks and
one contract. That was 1990.
OCT 1990
Well Analysis Corporation opens in Bakersfield with three logging units, analog equipment on every one, and a single contract with Shell Oil Company.
THE SLOW YEARS
The industry went quiet. WELACO kept growing anyway, on the strength of one thing: the quality of the service.
BUILDING THE SHOP
Computerized logging units. In-house drafting and log reproduction. A complete machine shop producing our own downhole electronic tools, with an electronics engineer on staff.
TODAY
The largest production logging company on the West Coast. Home office in Bakersfield, offices in Los Angeles and Fallon, Nevada. Gas storage, steam injection, water flood and disposal, fluid entry, noise and geothermal logging, on shore, offshore and overseas. Committed to a full-time R&D department and to growing with our customers.
Contact
Tell us about
the well.
Field, depth, what you are trying to find out. We will come back with a plan and a crew date.
HOME OFFICEWell Analysis Corp.
5500 Woodmere Drive
Bakersfield, California 93313
EMAILinfo@welacogroup.com