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What hydraulic fracturing is, how the process works stage by stage, what's actually in frac fluid, and why it unlocked America's shale oil and gas.
Hydraulic fracturing — 'fracking' — is a well completion technique that pumps fluid and sand into low-permeability rock at high pressure to create and prop open fractures, giving trapped oil and gas a path to flow to the well. Combined with horizontal drilling, it turned previously uneconomic shale into the engine of US energy production.
Here we explain the process step by step, what proppant and frac fluid are made of, how a long lateral is fractured in dozens of stages, and we separate the facts from the common myths.
A plain-English definition.
Read →The step-by-step process.
Read →What holds the fractures open.
Read →Water, sand and additives — the real breakdown.
Read →Plug-and-perf, sleeves and zipper fracs.
Read →Why shale needs fracking.
Read →
Built by the team behind OpsFlo — field service & billing software for oilfield service companies. Capture tickets at the wellsite and bill in days, not weeks.
No. A typical slickwater frac fluid is roughly 90% water and 9.5% sand, with only about 0.5% chemical additives such as friction reducers and biocides. Operators disclose additives publicly via FracFocus.
Fracturing occurs thousands of feet below freshwater aquifers, separated by impermeable rock and multiple cemented casing strings. Documented water-quality incidents are generally traced to surface spills or faulty well construction, not fractures reaching aquifers.
A modern horizontal well is typically fractured in 30 to 60 or more isolated stages along the lateral, each targeting a limited interval for even reservoir coverage.