TECHNICAL WRITING PORTFOLIO

Complex engineering, explained so it actually lands.

I'm Annie Otedoh. I turn dense subject matter — petroleum engineering, earth science, industrial process — into short, structured explainers people finish reading. Below: three samples, ordered from the most structurally demanding to the lightest.

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writing samples
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subject domains
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jargon left unexplained

Samples

Each piece was written to make a technical audience-adjacent reader — someone curious, not necessarily an engineer — understand a real mechanism, not just enjoy a fun fact.

Stages of an Oil Well

process explainer — petroleum engineering
ProblemThe oil well lifecycle has many overlapping technical stages that confuse outsiders.
ApproachSequence it as a real numbered process — because order is the point — and give each stage one plain-language job description.
OutputAn 8-step reference a non-engineer can follow start to finish.
01

Exploration

Geologists and geophysicists test how viable the land is; wildcat wells are drilled to confirm the site is worth developing.

02

Site Preparation

The land is cleared, access roads are built, and equipment is brought in ahead of drilling.

03

Drilling

A hole connects the surface to the subsurface. Steel casing provides structure, cement locks it in place, and drilling mud controls pressure.

04

Well Completion

Valves, tubing, and perforation are added — the finishing work, including installing the wellhead ("Christmas tree") — before the well is ready to produce.

05

Production

Oil and gas travel up through the tubing. Water, gas, and oil are separated before the crude moves on through pipelines.

06

Well Maintenance

Damaged equipment is repaired and blockages cleared to keep production running smoothly.

07

Enhanced Recovery

Once natural reservoir pressure drops, water, steam, or gas is injected to push out more oil — potentially raising total recovery to around 70%.

08

Plug and Abandon

When a well is no longer commercially viable, it's permanently sealed with cement, closing out its lifecycle.

The Laws That Secretly Control Petroleum Engineering

concept explainer — applied physics
ProblemPhysics laws (Boyle's, Darcy's, Joule–Thomson) sound abstract and disconnected from real drilling work.
ApproachGive each law a one-line "plain translation" before the technical explanation, anchoring theory to what actually happens downhole.
OutputA four-law breakdown that makes textbook physics feel like field knowledge.
1. Boyle's Law
// gas expansion helps push oil to the surface

Deep underground, gas is highly compressed. Once drilling starts and oil begins flowing out, pressure drops — giving that gas more room to expand. That expansion acts like a piston, helping push oil through the reservoir and toward the wellbore.

2. Joule–Thomson Effect
// rapid gas expansion can freeze pipelines shut

When highly compressed gas suddenly expands through tight spaces, it cools rapidly. If water is present, gas hydrates — ice-like solid plugs — can form and completely block pipelines and flowlines.

3. Darcy's Law
// how easily fluid moves through rock decides how a well performs

Reservoir rocks contain tiny pore spaces that act like microscopic highways for fluid. Darcy's Law explains that the easier fluid moves through those pores (permeability), the easier oil flows — and ultimately, whether a well is commercially viable.

4. Murphy's Law
// not official, but every offshore engineer plans around it

Equipment failure, stuck pipe, hydrates, blowouts — offshore engineering runs on contingency planning because so much can go wrong. It's controlled chaos with steel pipes, and the best documentation assumes Murphy is right.

52 Amazing Facts About Rocks (Part 2)

educational carousel — geology
ProblemGeology reads as dry or purely academic to a general audience.
ApproachCompress each fact into one clean, standalone sentence — no fact depends on the one before it.
OutputA skimmable, shareable fact list suited to social/carousel formats.
  • 23Ice can be considered a rock in geology.
  • 24Rainbow-coloured rocks exist (labradorite).
  • 25Obsidian is sharper than surgical steel.
  • 26Some rocks change colour in sunlight.
  • 27Some rocks are flexible (itacolumite).
  • 28Rocks can form from lightning strikes (fulgurites).
  • 29Permeability controls how fluids flow through rocks.
  • 30Porosity determines how much fluid a rock holds.
  • 31Precious gemstones come from rocks.
  • 32Some rocks are used in medicine.
  • 33Metals are extracted from ore rock.
  • 34Oil and gas are stored in rocks.
  • 35Glaciers carry and deposit rocks far from their origin.
  • 36Some rocks are naturally polished by rivers.
  • 37Some rocks are magnetic.
  • 38Crystals can grow inside rocks (geodes).
  • 39Impurities can turn diamonds blue, pink, or yellow.
  • 40Ruby and sapphire are "twins" — both corundum, distinguished only by trace elements.

About

I write to close the gap between subject-matter experts and everyone else. My background gives me a natural pull toward energy, earth science, and process-driven industries, but the actual skill is the same anywhere: find the real mechanism, strip the jargon, and sequence it so nothing needs to be re-read. I'm looking for technical writing, documentation, or STEM content roles.