与ISO 13503-4《石油和天然气工业完井液和材料第4部分:静态条件下增产和砾石充填液泄漏测量程序》相同。API RP 13M-4提供了在静态条件下测量增产和砾石充填流体的流体损失的一致方法。然而，本推荐规程中的程序不包括与多孔介质发生反应的流体。本版API RP 13M-4是ISO 13503-4（等同）石油和天然气工业完井液和材料第4部分:静态条件下的增产和砾石充填液泄漏测量程序的等同国家采用。

Identical to ISO 13503-4, Petroleum and natural gas industries-Completion fluids and materials-Part 4: Procedure for measuring stimulation and gravel-pack fluid leakoff under static conditions.API RP 13M-4 provides for consistent methodology to measure fluid loss of stimulation and gravel-pack fluid under static conditions. However, the procedure in this Recommended Practice excludes fluids that react with porous media.This edition of API RP 13M-4 is the identical national adoption of ISO 13503-4, (Identical) Petroleum and natural gas industries-Completion fluids and materials-Part 4: Procedure for measuring stimulation and gravel-=pack fluid leakoff under static conditions.