After a well is drilled, it must be evaluated to determine if it contains commercial quantities of oil or gas. The well logging market includes both wireline logging (lowered after drilling) and LWD (logged while drilling).

Logging Measurement

The [LSI keyword: well logging market] measures several physical properties. Gamma ray: distinguishes shale (high radioactivity) from sandstone/limestone (low). Resistivity: detects hydrocarbons (oil is resistive, saltwater is conductive). Porosity: measures the volume of pore space (using neutron, density, or sonic tools). The well logging market for "sonic" (acoustic) tools measures the speed of sound in the rock, which correlates with porosity. The well logging market for "nuclear magnetic resonance" (NMR) is the most advanced, measuring pore size distribution and fluid properties (oil vs. water). The well logging market for "formation pressure" (using a probe to measure pressure) and "formation sampling" (extracting a fluid sample) are used to confirm fluid type. The well logging market for "image" logs (creating an image of the borehole wall) are used to identify fractures and sedimentary structures.

The well logging market is segmented by method (wireline vs. LWD). Wireline logs are run after drilling (or on a separate trip). The well logging market for wireline is mature. LWD logs are run while drilling. The well logging market for LWD is growing, as the data is real-time and the hole is fresher. The well logging market for "combo" tools (which combine multiple measurements in one string) is standard.

Open Hole vs. Cased Hole

The well logging market is divided into open hole (before casing is set) and cased hole (after casing is set). Open hole logs measure the formation directly. The well logging market for "open hole" is the primary evaluation for new wells. Cased hole logs are used to evaluate the well after casing is in place (e.g., to check cement bond, to monitor production over time). The well logging market for "cement bond" logs (CBL) measures the quality of the cement job. The well logging market for "production" logs (PL) measures flow rates and fluid types in producing wells. As the well logging market continues to evolve, the focus will be on "high-temperature" and "high-pressure" (HPHT) tools, on "wireless" telemetry (for cased hole), and on "real-time" data transmission (to enable faster decisions). The well log is the final report card on a well, determining its value and future production.

Explore key developments shaping industry transformation:

key industrial hose

mexico industrial hoses market

north america industrial hose market

two wheeler rubber hoses and tubing market