Engineering services · New line

Integrated well reactivation engineering

From reservoir to production: integrated study, candidate screening, well-integrity assurance, intervention design, procurement and workover engineering supervision.

Light and medium crude · Nationwide coverage

Why now

Idle wells: the largest source of incremental production

30,722
oil wells in the country
8,491
active wells (27.6%)
22,231
idle wells awaiting intervention

Source: Venezuelan Petroleum Chamber, Venezuela Energética forum (April 2026). Reference figures

Lower CAPEX, faster to production

An idle well retains its wellbore, cemented casing, location and flowline. With remaining reserves confirmed by material balance and barrier integrity verified, the intervention restores production at a fraction of the CAPEX of a new well, with no exploration risk and a cycle time of weeks.

Engineering is the limiting factor

Reactivating the idle inventory demands reservoir, production and workover engineering backed by operational experience. Rig supply is growing faster than these technical teams: engineering is the program's limiting factor.

Where value is lost

Common failure modes in a reactivation program

01

Candidate selection with no reservoir basis

Wells are worked over by rig availability rather than remaining reserves, pressure and drive mechanism. The well ends up reconditioned but not producing.

02

Undersized rig

Hook load and drawworks power below the string weight plus fishing overpull. The string — or the well — is lost.

03

Integrity not verified

Casing, cement and wellhead with no prior diagnosis (cement log, pressure test). The problem is found with the rig already on location.

04

Materials out of sequence

Tubulars, packer or third-party services arriving after rig-up. Non-productive time paid at rig rate.

05

Design without nodal analysis

Tubing, artificial-lift method and perforation defined without modeling the IPR/VLP system. The well produces below its potential.

06

Program without change control

Field decisions with no approved program or record. No traceability and no lessons learned.

Cost concentrates at the rig; the outcome is decided by the engineering that precedes it.

Technical approach

Geosystem: reservoir, well and surface as one

The well is a continuous hydraulic system from the drainage radius to the separator. Production results from the balance between the reservoir's inflow capacity (IPR) and the lift capacity of the well and its facilities (VLP). Every reactivation decision is made on that integrated model, not on an isolated stage.

Flow: reservoir → well → surface Sección esquemática: el aporte del yacimiento (IPR) entra al pozo por los cañoneos, asciende por la tubería (VLP) y sale por el cabezal hacia las facilidades de superficie. Superficie del terreno Reservoir IPR Well VLP Surface Cabezal · facilidades Flow: reservoir → well → surface

ReservoirIPR

Static pressure, remaining reserves, drive mechanism, permeability, formation damage, fluid contacts and PVT. Defines inflow potential: the IPR curve.

WellVLP

Barrier integrity, mechanical diagram, perforated intervals, tubing, packer and artificial-lift method. Defines lift capacity: the VLP curve.

Surface

Wellhead, flowlines, manifolds, separation and backpressure of the gathering system. Sets the wellhead pressure the well must produce against.

Practical consequence: tubing diameter, lift method, the interval to perforate and even rig capacity are outputs of the integrated model, not input assumptions.

Service scope

Seven phases with deliverables and client approval

Each phase closes with a technical report and a client approval to continue, adjust or stop the program. The scope can be contracted in full or by phase.

01 Integrated study
  • Data validation: logs, cores, PVT, pressure tests and production/injection history.
  • Static model: structural framework, petrophysics and fluid contacts.
  • Dynamic model: material balance, decline analysis and drive mechanism.
  • Remaining reserves by sand and by well; intervals with recompletion opportunity.

Phase deliverable Potential report by reservoir and sand, opportunity and current-pressure maps, a validated technical database and an idle-well inventory with preliminary potential.

02 Candidate screening
  • Scoring by criteria: reservoir potential, fluid, mechanical integrity, intervention complexity and surface.
  • A/B/C ranking by production potential and ease of intervention.
  • Focus on light and medium crude; heavy and extra-heavy are assessed as separate programs.

Phase deliverable Ranked wells with the recommended reactivation sequence. Weighting criteria are agreed with the client.

03 Diagnosis
  • Wellhead inspection: tubing and annular pressures, sustained casing pressure (SCP).
  • Acoustic fluid level, casing pressure test and diagnostic swabbing.
  • Fluid sampling and accessible-depth check.

Phase deliverable A diagnosis sheet per well, the recommended intervention type and wells ruled out with technical basis. Separates wells recoverable without a rig from those needing a full workover.

04 Integrity and design
  • Barrier verification (ISO 16530-1, NORSOK D-010): cement logs and casing pressure test.
  • Load analysis: string weight, fishing overpull and design factors.
  • Rig sizing by loads (API 4F/8C, API Std 53) and control fluid.
  • Completion design by nodal analysis (IPR/VLP); API 5CT tubulars.
Completion schematic Wellhead Surface casing Production casing Production tubing Packer Artificial lift Perforations Reservoir

Phase deliverable A per-well workover program with the rig technical requisition, approved by the client.

05 Procurement
  • Materials inspected on location before rig-up.
  • Tubulars with mill certificate and thread inspection; completion and lift string per design.
  • Cement, fluids and chemicals per design; guns and tools with confirmed service date; third-party services contracted.

Phase deliverable Materials released on location; procurement is closed against the program, not the other way around.

06 Workover
  • Well engineer on location: verifies execution against the program and authorizes technical changes with the client representative.
  • Daily engineering report: progress against program, non-productive time and decisions.
  • Defined scope: the rig contractor executes and is responsible for personnel, equipment and HSE; SERCOESCA provides the engineering.

Phase deliverable Supervised execution with change control and daily reporting.

07 Bringing on production
  • Kick-off by swabbing or coiled tubing with nitrogen until stable flow.
  • Initial well test with a portable separator: rates, BSW, GOR and pressures.
  • Nodal-model history match and artificial-lift adjustment.
  • Close-out report and look-back review for the next well.

Phase deliverable Initial well test and match against the design, close-out report and program feedback.

Timings are referential (assumes 15–20 rig days and available data). From the second well onward the phases overlap: while one well is on the rig, the next already has an approved program and materials on location.

Client data

Our engineering on the subsurface data chain

We work on whatever data repository the client has, in whatever state it is in. Results are delivered in OSDU- and ArcGIS/QGIS-compatible formats so they integrate into the client's platform with no rework. Platforms organize the information; they don't decide which well to intervene or how. That is our scope.

Engineering and supply

Engineering and supply under one responsibility

SERCOESCA supplies OCTG tubulars (API 5CT), sucker rods and mechanical-pumping accessories (API 11B/11E), lubricants and location modules. The specification comes out of the design, and procurement is closed against the program — not the other way around.

Technical governance

Technical independence, change control and traceability

Engineering, not operations

We own no rig and operate no equipment. The technical requisition is issued from the well's loads and pressures; the client contracts the rig and the contractor is responsible for the operation.

Approved program and change control

No operation runs without an approved program; every deviation is documented and authorized before execution.

Well control and barriers

We verify two barriers throughout the intervention and the BOP test, in line with the well-control and HSE standard of the operator and the contractor.

Daily reporting and close-out

Operations report every 24 hours, a decision log, classified non-productive time and a close-out report per well.

Third-party services

Wireline, coiled tubing, cementing and perforating with vetted vendors; technical and sequence coordination handled by our engineering.

Compliance

Contracts with defined scope, counterparty verification and compliance with the regulations applicable to each project.

Design references
  • ISO 16530-1
  • NORSOK D-010
  • API 4F/8C
  • API Std 53
  • API 5CT

The team

A team with 20+ years in Venezuelan fields

Reservoir engineering

Integrated studies, material balance, reserves and candidate screening.

Production engineering

Diagnosis, nodal analysis, artificial lift and well testing.

Workover and recompletion

Workover engineering supervision, fishing, squeeze cementing and well control.

Completion

Completion design, perforating and initial evaluation.

Planning

Operational programs, risk analysis and change control.

Technical procurement

Specification, inspection and logistics of tubulars and materials.

Field experience, not desk experience · 20+ years in Venezuelan fields. A team based in Venezuela, trained in workover, recompletion and completion with operators and joint ventures, in light and medium crude and gas-condensate reservoirs. Nationwide coverage.

Engagement models

Scope contractable by phase

01

Technical advisory

Program review and validation, a well engineer on location, and candidate and risk assessment for a client team.

02

Engineering by phases

Execution of one or several phases, from the integrated study to the workover program.

03

Full well engineering

Engineering responsibility across the seven phases, through to bringing the well on production and the close-out report, per the program and the handover criteria agreed with the client.

Recommendation: start with phases 1 to 3 on a group of wells. It delivers ranked, diagnosed candidates before committing a rig, and lets the client validate the team on a bounded scope.

Next steps

How we start

  1. 01

    Technical meeting

    Review of the field, the idle-well inventory and the available information (logs, history, diagrams).

  2. 02

    Confidentiality agreement and data access

    Production and injection history, pressure tests, logs, mechanical diagrams and past interventions.

  3. 03

    Phase 1–3 proposal

    Scope, schedule, assigned team and committed deliverables for the integrated study, candidate screening and diagnosis.

Request a technical meeting

Tell us about the field and the idle-well inventory. We'll come back with a proposed technical meeting.

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