An Intelligent Completion Flow Simulation Method Based on Point-Bridge Topology

Abstract

An intelligent well completion flow simulation method based on point-bridge topology, step 1, collecting basic information related to well completion and reservoir; step 2, drawing a schematic diagram of the completion structure; step 3, performing grid division according to the schematic diagram of well completion Step 4: Select the grid center in each section of each layer as the axial grid calculation point; Step 5: If there is flow between adjacent grid calculation points in the axial and radial directions, connect them with a straight line, Establish a point-bridge topological structure diagram of intelligent well completion; step 6, calculate the pressure and flow distribution in the annulus of each layer according to the established point-bridge topological structure, the calculation formula of the flow and pressure distribution in the pipe string is Bernoulli benefit equation; the present invention is based on the point-bridge topology to characterize the five-layer flow annular pipe string of intelligent well completion, fully considers different environmental controls and different flow laws in the pipe string, and accurately calculates the flow and pressure changes, thereby realizing intelligent well completion Accurate simulation and calculation of downhole flow.

Description

technical field [0001] The invention relates to an intelligent well completion method in the field of petroleum and natural gas development, in particular to an intelligent well completion flow simulation method based on a point-bridge topology. Background technique [0002] Well completion refers to the method of establishing a communication channel between the wellbore and the reservoir after the wellbore is drilled. The communication channels established by traditional well completion methods such as perforation completion cannot realize post-control. Intelligent well completion refers to the well completion method with downhole data monitoring and flow control system, through data monitoring and flow control to realize the optimization of development, so as to achieve intelligence. One of the core systems of intelligent well completion is the downhole flow control system, including tools and equipment such as power transmission, signal analysis and transmission, downhol...

AI Technical Summary

Problems solved by technology

[0003] The main problems are (1) In terms of intelligent well completion equipment and tools, although localization has been initially realized, the intelligence of well completion is realized through precise simulation and control of flow, and core technologies such as simulation methods and control schemes still need breakthroughs (2) In the reservoir, intelligent well completion has at most five layers of flow annulus: tubing, center pipe (or liner), sand control screen layer, flow control layer (ICD or ICV, etc.), completion (jet pore, etc.) layer, near wellbore reservoir

The flow laws in the five-layer ring control string are different, and the radial flow and axial flow exist simultaneously, which makes the pressure distribution and flow change rules more complicated. The conventional completion flow rules and productivity calculation methods have many assumptions and large errors. Large, unable to meet the calculation requirements of intelligent well completion

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