Fire flooding assisted gravity drainage injection-production system and injection-production method based on intelligent temperature control

Abstract

The invention discloses a filling and extraction system achieving fireflood auxiliary gravity oil drainage based on intelligent temperature control and a filling and extraction method. According to the filling and extraction system, a filling pipe column, a monitoring pipe column and a production pipe column which are independent from one another are arranged in a production well, and an air filling well is provided with an air filling pipe column and an intelligent temperature control device used for intelligent regulation of the temperature of produced liquid. The filling pipe column is in serial connection with an insulated pipe, a sieve pipe and a guide cone, the monitoring pipe column is in serial connection with a monitoring pipe, the sieve pipe and the guide cone, the monitoring pipe is provided with a pressure measuring device, and the production pipe column is in serial connection with a hollow rod, an air-proof pump, a gas anchor, the sieve pipe and the guide cone. The intelligent temperature control device comprises multiple sets of temperature measurement devices arranged in the monitoring pipe column, a temperature measurement probe installed on a production pipeline on a wellhead, a data acquisition device arranged at a ground end, a control device connected with a data acquisition device and a temperature control actuating mechanism connected with the control device, wherein the temperature control actuating mechanism includes one of a filling pipeline communicated with the filling pipe column, an air filling pipeline communicated with the air filling pipe column and an electric heating device extending into the production pipe column.

Description

technical field [0001] The invention relates to the field of incineration oil layer exploitation, in particular to an intelligent temperature control-based fire flooding assisted gravity drainage oil injection and production system and an injection and production method. Background technique [0002] The combustion oil layer recovery technology uses part of the heavy components of the crude oil in the oil layer as fuel, continuously burns to generate heat, and drives the crude oil out of the oil layer. Compared with other oil recovery methods, it has many advantages such as wide application range, high oil displacement efficiency, and low cost. It can become an effective replacement technology for heavy oil recovery. Applying fire technology to horizontal wells can achieve the effect of fire flooding assisted gravity drainage. The typical characteristics of the production process of fire flooding assisted gravity drainage are high temperature (up to over 700°C), high gas-oi...

AI Technical Summary

Problems solved by technology

The data collection of these two wells is scattered, and requires frequent observation by the operators, and only manually records once an hour. The data collection is complicated, the workload is heavy, and it consumes manpower. Moreover, the recorded temperature data are all discrete, and the downhole temperature cannot be accurately expressed. changes over time;

[0009] (2) After obtaining the temperature data, there is no feedback link. When the operator finds that the range of change is large, he can only perform temperature control operations manually (adjust the amount of water injection, gas injection, and / or turn on electric heating, etc.); In time, high-temperature oxidative combustion may occur in the near-wellbore area of ​​the horizontal production well, and the fluid production temperature will increase significantly, which may bring serious consequences to fire flooding, such as pipe string burnout, gas channeling, sand production, etc., and if the gas injection rate reaches Less than the requirements of high temperature oxidation combustion of oil layer, oil layer combustion will enter low temperature oxidation combustion

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