Research And Improvement Of The Supporting Technology Of Multi-Sublayer Test Instrument

Multi-Sublayer Test Instrument is based on the patent of "Casing hole formation dynamics tester", which is a new generation of cased hole wireline formation tester. Applied to Test oil of the cased hole after perforating. Or Formation Testing of oil and gas production wells in early, middle and late.It can obtain formation pressure, formation pressure gradient, formation temperature and other parameters directly from the target reservoir through hierarchical test.Also it can provide effective formation permeability, skin factor, fluid index and the fluid density. and other important parameters. Mean while, the instrument could accurately measure the gas and water interface, and complete dynamic monitoring of reservoirs. It is an integrated oil and gas producing wells of the reservoir dynamic characteristics of the tester.This paper is based on the structure and test principle of Multi-Sublayer Test Instrument, focuses on the relevant supporting technology of Multi-Sublayer Test Instrument.The supporting technology includes hydraulic balancing technology under high temperature and pressure, automatic pressure testing technology, signal transmission coding system and ground control technology. Combined with laboratory test results, by researching and analyzing the overall process of debugging problems with pressure testing of Multi-layered instrument, which will propose a solution or improvement program and demonstrate the feasibility and requirement of the instrument. Also to ensure the safety and reliability when the instrument works in the well.