Determining wellbore leak crossflow rate between formations in an injection well

Abstract

Techniques to determine wellbore leak crossflow rate between formations in an injection well are described. The techniques repurpose well performance principles to achieve the objective of cross flowrate quantification without the need to run a flowmeter.

Description

[0001] priority claim [0002] This application claims priority to US Patent Application No. 15 / 805,813, filed November 7, 2017, the entire contents of which are incorporated herein by reference. technical field [0003] This specification relates to lateral flow analysis in injection wells. Background technique [0004] Injection wells are used to flow fluids into a subterranean region comprising a formation, a portion of a formation, or formations, such as sandstone, limestone, or other formations. The injection fluid can be water, wastewater, brine, water mixed with chemicals, combinations thereof or other fluids. Injection wells are sometimes used for hydrocarbon recovery. For example, fluids such as steam, carbon dioxide, water, or other fluids may be injected into a hydrocarbon reservoir to maintain reservoir pressure, or to heat hydrocarbons in the reservoir, thereby allowing recovery of the hydrocarbons from the reservoir. Sometimes a leak occurs inside an injecti...

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Problems solved by technology

Such leaks can affect the integrity of the injection well and thus the recovery of hydrocarbons from the hydrocarbon reservoir

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