학술논문

SYSTEM OF DEVICE FOR CONTROLLING FLUID INJECTION IN A WELL
Document Type
article
Source
Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 330, Iss 11, Pp 192-198 (2019)
Subject
inflow control device
horizontal well
neural networks
matrix approach
modeling
Engineering geology. Rock mechanics. Soil mechanics. Underground construction
TA703-712
Language
Russian
ISSN
24131830
2500-1019
2413-1830
Abstract
The relevance of the research is in the fact that fluid flow control devices can serve as a practical solution to premature breakthrough of water or gas in a horizontal well due to heterogeneity of inflow profile along the axis of the horizontal trunk, changes in reservoir pressure at various sites, as well as development of contact fields, especially as the deposits are depleted, serve as fluid control devices. There are active Interval Control Valve (ICV) or passive Inflow Control Device (ICD). ICD devices are able to equalize the inflow along the horizontal well, creating additional resistance to fluid flow, depending on the amount of inflow in this horizontal section. The drawback of modern ICDs is that they do not have the ability to regulate and activate ICD after installation in the wellbore. This creates certain risks associated with the uncertainty in description of reservoir properties that are present at all stages of field development. ICV systems are operated remotely from the surface of the well, but are not able to determine the nature of the incoming fluid (oil, gas, water) into the well and make a decision in automatic mode. Objects of the research are a horizontal wells and a fluid flow control device. Methods: simulation Simulink, neural networks, matrix methods, methods of linearization of nonlinear equations. The main aim of the research is to development of a new design scheme of the inflow control device, with the possibility of continuous monitoring of the nature of the incoming liquid, and software for controlling the valve with the wellhead. Results. The authors have proposed a new design scheme of inflow control device in a horizontal well, which helps continuous assessment the nature of the incoming fluid. This design allows you automatically adjust the position of the actuator mechanism, as reported by measuring instruments. The mathematical description of the valve operation is given. The model of the valve was developed in Simulink simulation environment, using the matrix approach and neural networks, to build a qualitative dependence of the valve position on pressure drop value. The results of the neural network block operation and the final result of modeling are presented.