Method for promoting thick oil oilfield oil well oil production

Abstract

The invention discloses a method for increasing the oil production of a thick oil well. The method is to drill a plurality of horizontal branch boreholes which are communicated with a main bore hole with a drilling method along horizontal direction in an oil layer, and to inducibly generate a plurality of root shaped induced oil flow channels around the main bore hole and in the deep part of the oil layer, thereby increasing the oil production of the oil well. The method generates the plurality of inducible oil flow channels through drilling, increases seeping channels and improves the seeping capability of thick oil in the stratum, according to the characteristics of an offshore thick oil deposit, the mechanical properties of rock and the formation fluid properties, in particular to the restriction of service life of a production platform (generally 20 years), so crude oil can flow into a pitshaft more easily. Therefore, the method greatly increases the well yield capability of an oil field and the rate of oil production, and has enormous economic and technical benefits.

Description

technical field [0001] The invention relates to a method for increasing the oil production of an oil well in a heavy oil oil field, in particular to a method for drilling to induce loose sandstone heavy oil flow channels to increase the oil production of the oil well. Background technique [0002] Generally, the crude oil recovery rate of heavy oil fields is much lower than that of ordinary oil fields. For example, in oil fields with a formation viscosity of less than 10mPa.s, the recovery rate can reach more than 50%; It is very difficult to reach 25%. For a long time, crude oil research and engineering technicians have focused on the development of heavy oil, researched and applied steam huff and puff, steam flooding, steam assisted gravity drainage (SAGD), burning oil layers, wellbore heating, gas flooding, microbial flooding, light injection, etc. Physical and chemical methods such as oil (solvent) dilution and crude oil viscosity reducer reduce the viscosity of crude o...

AI Technical Summary

Problems solved by technology

[0004] 1) The injection equipment is bulky and takes up a lot of space, and the oil production platform is too small to be placed; if the platform is transformed, the cost is too high;

[0005] 2) The energy consumption of the injection process is high, and the power of the platform is difficult to meet; some technologies require fresh water, and the cost of seawater desalination on the platform is high;

[0006] 3) In light oil dilution technology, there is a shortage of light oil resources and external transportation, the cost is too high and the economic benefits are poor;

[0007] 4) The use of crude oil viscosity reducer requires a large amount and high cost, and there is a possibility of environmental pollution;

[0008] 5) There are great security risks in the application of the above technologies in offshore oilfields

According to the current technical level, the above-mentioned technologies cannot be applied in offshore oil fields

Images